bluuebunny/crossref_metadata_2025 huggingface dataset:
Test on Corrosion Resistance of GFRP Anchor Bolt
Authors: Luo Xiao Yong , Tang Xie Xing , Li Kai Lei , Kuang Ya Chuan
Published: June 2012

Steel is commonly used as the materials of anchor bolts in permanent anchoring works. The nature the steel anchor bolt easy to be corroded, however, poses a serious potential safety hazard to the anchoring system mainly including steel anchor bolts. To use GFRP(glass fiber reinforced polymer) anchor bolts instead of reinforcing bars is an effective means to deal with corrosion. Based on the test of accelerating aging in high solubility, the physical and mechanical performance tests are conducted on GFRP bolts in normal, acid, alkalis and salt conditions, from which the change law of physical and mechanical property can be studied for bolts in different corrosion conditions. As shown from the test results, the weight of GFRP bolt is reduced after it is corroded and the rate of weight loss increases as the corrosion time extends. Thick swelling can be seen on bolts in alkalis conditions. Loss rate of tensile strength and increase rate of elastic modulus are greater in alkalis conditions than in acid conditions, the former reaching 13.76% and the latter 9.83%. As for bolts in acid conditions, tensile strength decreases as the corrosion time extends while the rate and amount of loss is less than that of bolts in acid and alkalis conditions. The tensile strength decreases as the solubility of corrosion solution increases. The loss rate of tensile strength is the most for bolts in alkalis conditions; it comes second in acid conditions and the least in salt conditions. The elastic modulus of bolts in acid conditions and alkalis conditions increases while the rate is comparatively low as the solubility gets higher. Elastic modulus of bolts in salt conditions decreases as the solubility rises with lower rate and smaller amount of loss. These results supply test foundation for application of GFRP bolts in complicated geological conditions.
Experimental Study on Mix Design of Plastic Concret with Lower Elastic Modulus and Higher Impervious Coefficient
Authors: Cheng Su Zhen , Xu Shang Jie , Cong Rong , Wang Ke Liang
Published: June 2012

Through laboratory testing, the main properties and effects of rubber particle and water-binder ratio of plastic concrete are researched. The results indicate if the rubber particle of plastic concrete with certain water-binder ratio increases and its elastic modulus decreases, there is no effect to the permeability coefficient of plastic concrete basically. If the water-binder ratio of plastic concrete is lower, its elastic modulus increases but permeability coefficient reduces distinctly. Therefore, the comprehensive utilization of the test of rubber particle with change of water-binder ratio can make up plastic concrete with lower elastic modulus and smaller permeability coefficient. It will provide a new method to solve the problem of plastic concrete with higher elastic modulus and larger permeability coefficient and meet the needs of a project.
Collision Ansysis of Sandwiched Polyurethane Composite Steel Tube
Authors: Wang Lin , Zhang Xing
Published: June 2012

This paper mainly uses nonlinear finite element software ANSYS/LS-DYNA to simulate the impact response of the sandwiched polyurethane composite steel tube as well as the traditional steel pipe. Comparative numerical simulation experiments were carried out in which sandwiched polyurethane tube and steel tube with the same mass were respectively collided with rigid balls in the same velocity. The paper mainly analyzes the maximum collision force, absorbing energy and the maximum collision depth of the rigid collision ball of the two different types of tube. Then it concludes that the sandwiched polyurethane composite pipe crashworthiness of the collision is better than that of the traditional steel tube.
Application of FLAC to Study on Anchorage for Mountain Slope
Authors: Chen Hai Jun , Yuan Wei Bin
Published: June 2012

In the paper, the mountain of Siwu village was selectedd for the study. Combined with status of landslide, three typical profile of the slope were selected to carry out stability analysis, reinforcement scheme was proposed for the characteristics of each slope. Based on the field measurement, the fast Lagrangian numerical simulation (FLAC) was used to carry out comparative study of the quality of the two anchoring scheme. The results show that two reinforcement measures with anchor cable or anchor can be effective to provide slope stability.
Structural Performance of Chinese Larch Plywood
Authors: Zhou Hai Bin
Published: June 2012

China has the largest plywood production in the world. With the fast development of timber construction in China, plywood has been used as an important structural material for sheathing. It is needed to evaluate some performances for structural use, such as uniform load test. Plywood of different thickness is manufactured according to independent developed technology on a production line. The uniform load capacity was evaluated for wall sheathing. The results showed that those two types met requirements on structural performances of wall sheathings of PS2. It was suggested that the unnecessary high performance should be intentionally lowered by veneer combination of larch or other soft species.
Development of a Fire Resistant Low Alloy Steel for Construction
Authors: Sun Ying
Published: June 2012

Three fire-resistant steels for construction were developed, which are low carbon Mn-Cr-Mo steel microalloyed with Nb and free Nb. The mechanical properties of the alloy were studied by tensile and impact testing. The effects of parameters in controlled rolling and controlled cooling process on the mechanical properties and the microstructures of the steel were investigated. It is found that the precipitation strengthening is important strengthening way to improve the elevated temperature strength of fire-resistant steels.
Finite-Element Analysis on Carbon Fiber Reinforced Polymer (CFRP) Plates Reinforcement for the Rigid Joints of Steel Structures
Authors: Ma Hua , Zhou Li Chun , Li Zhen Bao , Zhang Xue Wei , Sun Xin Yu
Published: June 2012

The method of CFRP plate reinforcement for the rigid joints with complete welding was studied using finite-element analysis. Three models were adopted in analyzed software ANSYS and they are Solid45, Combin14 and Shell181, which used to simulate steel, glue and CFRP plate respectively. The results show that the ultimate bearing capacity of rigid joints improves significantly after using CFRP reinforcement for joints. And the results also show that the level of improvement is relative to the length, width and thickness of CFRP plates.
The Matching of Flow Control and Structure Parameters for the Bitumen Foaming Technology
Authors: Cheng Hai Ying , Yan Ting Yuan , Wang Peng Fei , Li Zhi Qiang , Du Juan
Published: June 2012

A new driving device is developed for precise flow control of bitumen foaming. Based on the theoretical studies like fluid dynamics, contact heat transfer, phase change, multiphase flow and turbulent flow theories, a reasonable control model for the bitumen foaming behavior is built. And the CFD simulation analysis of the model with the testing parameters is taken. The results show that the foamed bitumen outlet flow follows the quadratic curve control law with the new driving device.
Analysis of Structural Properties and Seismic Performance of a Temple
Authors: Gao Da Feng , Wang Lei , Li Peng Fei
Published: June 2012

In order to further study the seismic mechanism of ancient timber structure, the wooden structure of the temple was taken as the research object, and the reasonable mechanical model was established by applying semi-rigid spring element to simulate mortise-tenon joint, tou-kung and column base. The test of the compressive, bent and the shear capacity all met requirements by analyzing the model under the static load, and the average safety margin of the structure is 86.7%. The first six inherent frequencies and vibration shapes were obtained by analysing the finite element model using the method of Block Lanczos, With full transient analysis, considered the model in the El-Centro wave, Taft wave and Lanzhou artificial wave excitation under the three earthquake time history analysis, and got the model acceleration time history curves, the results show that the ancient Chinese timber structure has better aseismic performance. The above-mentioned methods and corresponding conclusions could provide the reference for maintenance and protection of ancient Chinese timber structure.
Microwave Absorbing Properties of MnO2/Ni-Zn Ferrite/Graphite Structural Composite
Authors: Deng Jing Lan , Huang Ke
Published: June 2012

In order to get high microwave absorbing properties, a new kind of three-layer structure composite absorption material was designed and prepared for optimal attenuation. Manganese Oxide was used as the absorbent in the matching layer. Nickel-Zinc ferrite (Ni-Zn ferrite) was used as the absorbent in the dielectric layer and Graphite was used as the absorbent in absorbing layer. The effects of different proportions of absorbents on the microwave absorbing properties were investigated. The results shows that the maximum wave absorbing peak of the 11# sample with the thickness of 5mm is −38.54dB at 14.35GHz and had a bandwidth of 7.1GHz (R<−10dB). This is very important in the design and application of absorbing material.
Overall Dynamic Analysis of K-Reticulated Shell Structure with BRB in Severe Earthquakes
Authors: Wang Xiu Li , Zhou Kun
Published: June 2012

The overall K6 reticulated shell structure's dynamic elastic-plastic analysis in 9 degrees area under earthquake was researched under different places of Buckling Restrained Braces (BRB) on the shell. The elastic effects of supporting structure and BRB were two key factors. Analysis result shows that it has good performance for energy dissipation on K6 reticulated shell with BRB on both upper and supporting structures together.
Seismic Analysis of Soil Nailed Wall Using Finite Element Method
Authors: Wu Jian Chun , Shi Rong
Published: June 2012

Using dynamic elastic-plastic finite element method, on the base of works together and interaction between loess and flexible retaining wall, 3-D nonlinear FEM (ADINA) is used to analyze and discussed the dynamic response of slope protected by soil nailing retaining wall under the EL-Centro and man-made Lanzhou accelerogram. A model that is capable of simulating the nonlinear static and dynamic elastic-plastic behavior of soil is used to model the soil, and a bilinear elastic-plastic model that has hardening behavior is used to model the soil nailing. Friction-element is employed to describe the soil-structure interaction behavior.The results show that the method is safe and credible. The results of the FEM dynamic analysis can be a useful reference for engineers of the design and construction of the soil nailed wall.
Practice and Theoretical Thought on the Supporting for Soft Rock
Authors: Zhang Qin Xiang , Zhao Hua , Xu Ting Hui , Zhang Shi Ping
Published: June 2012

The support of soft rock roadway is the worldwide problem in Coal resources exploitation, and this problem affect production safety and efficiency of coal mining serious. The surrounding rock of Ronghua coal mine is complex soft rock with expansibility, complex geological structure and deep high stress, large deformation of rocks, floor heave serious , supporting difficulties, frequent overhaul, waste a lot of manpower and material resources, and serious threats to the mine's safety production. After many years of practicing, a new idea of supporting the soft rock in different time periods, which is” avoiding first, then resistance”, was propounded. Based on the lithology of surrounding rock and geologic structure, the roadway’s length of service, application, and service condition were considered, several pointed support schemes of roadway in -650m level: Super-strong supporting, High-strong supporting, Flexibility combined supporting and Retractable U-shaped supporting were confirmed. A whole soft rock supporting technology system has been formed which effectively solved the difficult problems of soft rock supporting. These achievements can provide useful experience for similar engineering problems.
Groove Resistance Simulation Analysis and Fault Detection of Aluminum Reduction Cell
Authors: Wang Shu Ping , Song Ya Jing
Published: June 2012

The power spectrum method of frequency domain is presented in this paper for analyzing the four states of aluminum reduction cell (that is the normal condition, the liquid aluminum fluctuation, the abnormally low polar distance or drop of an anode and the anodic long bud), the characteristics of frequency domain under circumstances of function and malfunction and pointing out that groove resistance simulation analysis provide reliable basis for fault detection of aluminum reduction cell.
Research on Evaluation System of China’s Energy Security Considering Energy Transportation
Authors: Niu Dong Xiao , Lu Xin , Qiao Huan Huan , Zhai Hui Juan
Published: June 2012

Based on detailed analysis of the influencing factors on energy security, this paper build the China's energy security evaluation index system considering energy transport from the four aspects of energy supply, energy consumption, energy, transport, energy and social environment, then classified the level of energy security according to the evaluation system. At last, this paper made an empirical analysis on the 2001-2010 energy security through the Analytic Hierarchy Process.
A Single Ion Conducting Gel Polymer Electrolyte Based on Poly(lithium 2-Acrylamido-2-Methylpropanesulfonic Acid-Co-Vinyl Triethoxysilane) and its Electrochemical Properties
Authors: Cui Wei Wei , Tang Dong Yan , Guan Li Li
Published: June 2012

Single ion conducting polymer electrolytes synthesized through a copolymer poly(lithium 2-acrylamido-2-methylpropanesulfonic acid-co-vinyl triethoxysilane) and a crosslinker poly(etheylene glycol) dimethacrylate (PEGDMA) were prepared. Scanning electron microscope (SEM) was used to observe the morphology of the surface and cross-section of the polymer electrolyte membrane. AC impedance and linear sweep voltammetry were used to investigate the electrochemical properties of the polymer electrolytes. It was found that the obtained membrane had a typical amorphous structure and possessed a smooth surface. The bulk resistance of the polymer electrolyte increased with the increase in the plasticizer uptake. The electrochemical stability increased with the increase in the content of VTES.
Superconducting Magnetic Energy Storage Summarize
Authors: Zhou Xue Song , Lu Bin , Ma You Jie
Published: June 2012

Superconducting magnetic energy storage system using superconducting coils to store energy in the form of electromagnetic energy, Superconducting magnetic energy storage not only can reactive power compensation but also can active thought the power of mediation. It can achieve the power of the four-quadrant operation. This article outlines the advantages of the superconducting energy storage technology and development status, superconducting energy storage and how various components used. Finally describes how the four-quadrant active and power exchange. I think 21st century technology superconducting will develop far-reaching impact semiconductors as the 20th century semiconductors. So it has a great significance.
Microstructure and Corrosion Resistance of In Situ Al0.983Cr0.017/Al Composites
Authors: Zhang Jian , Wang Qiu Lin , Wan Bin , Zhao Long Zhi
Published: June 2012

In situ Al0.983Cr0.017 intermetallic compounds reinforced aluminum matrix composite was fabricated by the mechanical stirring casting method in this paper. In addition, microstructure and corrosion resistance of composite was investigated by XRD and SEM. The results show that the Al0.983Cr0.017 intermetallic compounds reinforcement distribute in the matrix uniformly. The clean interface between reinforcement and matrix has good interfacial bond. The corrosion resistance of Al0.983Cr0.017/Al composite materials presented a U-shaped curve, the best corrosion resistance present in the composite with 12% volume fraction reinforcement. The Al0.983Cr0.017 has a high corrosion resistance, which promoted the nucleation of pitting. Furthermore, the reinforcement interrupt the continuity of the matrix, inhibits the further expansion of pitting, which increases the corrosion resistance of composites.
Study on the Application of N,N′-1-Ethyl-4-Butyl, Triethylene and Diamine Hexafluorophosphate in Supercapacitors
Authors: Cai Ke Di , Mu Wei Fang , Mu Jun Yi , Jin Zhen Xing
Published: June 2012

An electrolyte, N,N′-1-ethyl-4-butyl, triethylene diamine hexafluorophosphate dissolved in glutaronitrile, was developed and investigated in a symmetrical supercapacitor using activated carbon as electrodes (active carbon/active carbon). The electrochemical erformance of the supercapacitor was examined using ac impedance and constant current charging/discharging tests. According to the results, its singleanode speciﬁc capacitance could reach 324.7 Fg−1. The supercapacitor also has better capacitance characteristics.
An Investigation of the Electrochemical Hydrogen Storage Performances of the RE-Mg-Ni-Based A2B7-Type Electrode Alloys Prepared by Melt Spinning
Authors: Zhang Yang Huan , Chen Le Le , Liu Xiao Gang , Yang Tai , Hou Zhong Hui , Zhao Dong Liang
Published: June 2012

The RE-Mg-Ni-based A2B7-type La0.75−xPrxMg0.25Ni3.2Co0.2Al0.1 (x = 0, 0.1, 0.2, 0.3, 0.4) electrode alloys were synthesized by melt spinning technology. The impacts of the melt spinning and the substitution of Pr for La on the microstructures and electrochemical characteristics of the alloys were investigated in detail. The results reveal that the as-cast and spun alloys have a multiphase structure, containing two main phases (La, Mg)2Ni7 and LaNi5 as well as a residual phase LaNi2. The melt spinning results in a notable grain refinement of the alloys without altering the phase structure of the alloys. The discharge capacity of the (x=0.1) alloy first mounts up and then falls with rising the spinning rate. And the as-spun (10 m/s) alloy yields the maximum discharge capacity with the variation of Pr content. Furthermore, the measurements of the electrochemical hydrogen storage kinetics reveal that the high rate discharge ability (HRD), the hydrogen diffusion coefficient (D) and the limiting current density (IL) of the alloys first increases then decreases with rising the spinning rate and the amount of Pr substitution.
Using Natural Dyes to Prepare Nanoporous TiO2 Dye-Sensitized Solar Cell
Authors: Pan Yun Fang
Published: June 2012

Dye-sensitized solar cell has been attracting considerable attention all over the world. In this article, natural dyes were used to prepare nanoporous Tio2 dye-sensitized solar cell. The nature dyes can be extracted easily and then employed in the solar cell to reduce material cost. At the same times, the dyes were non-toxic, environmentally friendly and fully biodegradable. Black rice, curcuma and red cabbage were used to prepare the organic natural dyes. The best dyes obtained from red cabbage as chlorophyll dyes that have the efficiency of energy conversion 0.05%.
Physical and Electrochemical Properties of a Mixed Lithium Phosphate as Cathode Material for Lithium Ion Battery
Authors: Xie Hui , Liu Jian Zhuang
Published: June 2012

A mixed lithium phosphate LiMn0.6Fe0.4PO4 as cathode material for lithium ion battery was synthesized by solid-state reaction. The crystalline structure, morphology of particles and electrochemical performances of the sample were investigated by X-ray diffraction, scanning electron microscopy, charge-discharge test and cyclic voltammetry. The results show that the small LiMn0.6Fe0.4PO4 particles are simple pure olive-type phase structure with uniformly distribution of gain size. The LiMn0.6Fe0.4PO4 obtained has a high electrochemical capacity, good cycle ability and excellent stability under high temperature. However, the capacity loss corresponding to 4.0V plateau at high rate, which had been proved by various electrochemical tests, is the main obstacle to its practical application.
Summary of Lithium-Ion Battery Polymer Electrolytes
Authors: Bin Wu , Chun Fan
Published: June 2012

Polymer electrolyte is a good ion conductor in lithium-ion battery with an excellent performance in conductivity, ion mobility and ion transport number. Some researches show strengthening mechanisms of polymer electrolyte membranes correlated with macromolecules group weight of PEGDME such as concentration of compounded Li+ salt. Ion transport in glassy polymer electrolytes including polymer backbones with same mesogenic chains can affect amorphous structure and relaxation at ambient temperature. In addition, singe crystal structure polymer electrolytes have various internal microstructures and external properties such as conductivity and charge or discharge stability in electrochemical that correlating with layers of ion diffusion and forming.
Damping Properties of Cups-Stacked Carbon Nanotubes (CSCNTs)/RTM6 Composites
Authors: Liu Yan , Li Rui Feng , Peng Hua Xin , Limmack Andy , Han Zhi Wu
Published: June 2012

Carbon nanotubes have better physical and mechanical behaviors than the traditional materials, in this study cups-stacked carbon nanotubes (CSCNTs) were filled into epoxy nancomposites to fabricate CSCNTs/epoxy nanocomposites. RTM6 was used by epoxy resin system. The cups-stacked carbon nanotubes (CSCNTs) were dispersed into the RTM6 matrix. In this study, damping properties of the CSCNTs/RTM6 were measured; effect of different weight percentages of the CSCNTs was investigated. And the morphologies of fracture surface of CSCNTs/epoxy nanocomposites were observed by scanning electron microscope (SEM); damping behaviors of the nanocomposites were studied by DMA tester at frequency domain.
Effect of Heat-Treatment on the Activity of Nickel Phthalocyanine Catalysts for Oxygen Reduction Reaction in Acid and Alkaline Electrolytes
Authors: Ding Lei , Xu Li , Liu Ling Ling , Qiao Jin Li , Liu Yu Yu
Published: June 2012

Effect of heat-treatment on the activity of nickel phthalocyanine (NiPc) catalysts for oxygen reduction reaction (ORR) was studied in both acid and alkaline electrolytes. The catalytic activity was found to depend strongly on the electrolyte and heat treatment temperature. High ORR activity was demonstrated on 40%NiPc/C electrode in 0.1M KOH solution, and the heat-treatment of 800oC is optimal for the catalyst synthesized. Further using rotating disk electrode (RDE) measurements and Koutechy-Levich analysis, the overall electron transfer number in the catalyzed ORR on 40%NiPc/C was found to be 2.8, suggesting the catalyzed ORR proceeds via both the 2e- transfer reduction and the 4e- transfer reduction.
Catalytic Processing of Coal into Liquid Fuels: Mechanochemical Activation of Coal
Authors: Zhaksyntay Kayrbekov , Ermek Aubakirov , Zhannur Myltykbaeva
Published: June 2012

This paper presents the results of the influence of mechanochemical treatment Karazhyrin coal on the yield of liquid products. Under the mechanochemical processing of coal along with the dispersion its activation is accompanied by significant structural changes of OMC. It is shown that the preliminary mechanochemical treatment contribute to the increase of the degree of conversion of coal in the process of hydrogenation. A more profound transformation of OMC is confirmed by an increase of the yield of liquid products, particularly, the content of the gasoline fraction is increasing.
A Survey of Nuclear and Solar Energy
Authors: Wang Chen , Zeng Kai
Published: June 2012

The energy is the important matter condition of the human survival and the development. Coal, petroleum, natural gas and other fossil energy support in 19 and twentieth Century in recent 200 years, the progress of human civilization and the development of economy and society,But coal, petroleum, natural gas and other non-renewable energy increasing consumption, not only make the mankind is faced with resource depletion pressure, but also feel the serious environmental problems threatening.At present, improving energy efficiency, development and utilization of renewable energy sources, protect the ecological environment, realizing sustainable development have become the common action of international renewable energy rich, clean, sustainable utilization. Strengthen the development and utilization of renewable energy, is to deal with the increasingly serious energy and environmental problems in the route one must take, also is the human society to realize the sustainable development of the route one must take.
Preparation of Domestic Honeycomb Briquette from Corn Stover and Coal
Authors: Zhang Xiao Bo , You Li Qin , Wang Tian Gui
Published: June 2012

In order to find new ways to utilize agricultural residues corn stover, mixing corn stover, clay and coal to make coal-biomass honeycomb briquette was studied. The effects of shape-forming pressure, biomass proportion, binder’s dosage were investigated by orthogonal experiments. The results show that the factor’s levels have no significant influence on the combustion time of coal-biomass honeycomb briquette. Further experiments indicate that to make coal-biomass briquettes qualified for substituting the marketed coal briquettes the amount of corn stover can reach to 20 percent of the briquettes (dry mass basis) and the shape-forming pressure lowers to 5 MPa. If the content of the corn stover reaches more than 25%, Strength of the honeycomb briquettes will lower than 700 N which is the low limit of the state’s standard though other indexes have on substantial change. Without changing use habit and stove, honeycomb briquettes produced from coal and corn stover can replace the traditional coal briquettes for domestic use, which can be considered as one of the choices to dispose agricultural residues.
The Influence of Mechanochemical Treatment on the Acid and Catalytic Properties of Modified Natural Zeolite
Authors: Gulzira Vassilina , Raisa Moisa , Elmira Yermoldina , Zhaksyntay Kayrbekov
Published: June 2012

The effect is studied of duration of mechanochemical impact, as well as modification sequence and grinding on the acidic and catalytic properties of synthesized catalysts based on natural zeolite in the conversion of n-octane.It is shown that the highest catalytic activity in the conversion of n-octane has a modified nickel-and zinc-based catalyst zeolite and structured bentonite clay, subjected to mechanochemical treatment for 12 hours after the promotion.
The Analysis of Tianjin Subway Environmental Control System
Authors: Chang Li , Tang Chen Hui , Li Zheng
Published: June 2012

The paper takes Tianjin subway as an example, and use the Subway Environment Simulation (SES) program to establish subway system with platform screen doors or different characteristics of two systems to carry out the simulate computation in summer, transition season and winter of the two systems; by analyzing the difference between two environment control modes, get the chart of the temperature distribution characteristic. The table result showed that it has more advantages using closed system than PSD system in Tianjin by using the primary invests and saving energy consumption.
Effect of CeO2 Promoter on Catalytic Performance of CuO-ZnO-ZrO2/HZSM-5 Catalyst for Carbon Dioxide Hydrogenation into Dimethyl Ether
Authors: Zhang Ming Yu , Wang Hua , Gao Wen Gui
Published: June 2012

A series of CuO-ZnO-CeO2-ZrO2/HZSM-5 catalysts were prepared and characterized by XRD, H2-TPR. CO2 hydrogenation to DME was carried out in a fixed bed reactor to test the catalytic performance of Ce-modified CuO-ZnO-ZrO2/HZSM-5 catalyst under the condition of GHSV=1800 h-1, p=3.0 MPa and T=250°C. The results indicate that the added CeO2 improved the performance of the bifunctional catalysts, the CO2 conversion and DME selectivity were obviously improved. CuO-ZnO-CeO2-ZrO2/HZSM-5 catalyst with Ce to Zr molar ratio of 1/1 showed the highest activity for DME synthesis from CO2 hydrogenation.
Experimental Study on Synthesis of Adsorption Material of Porous Zeolite with Fly Ash
Authors: Niu Yong Hong , Li Ying , Zhang Xue Feng
Published: June 2012

This paper investigates the use of a thermal power plant fly ash as raw materials for preparing zeolite test method. Process is making fly ash and sodium hydroxide in certain proportion mixed,calcined, grinded, stired, aged, washed, dryed. Finaly it develops with ideal adsorption properties of porous zeolite materials. The material in industrial water treatment and air purification field has broad application prospects.
Experimental Study on Treatment Phenolic Wastewater by Polymerized Silicate Containing Aluminium Sulfate and Magnesium Sulfate
Authors: Yang Jia Mo , Chen Ying , Wang Zhen , Ma Peng
Published: June 2012

A new inorganic polymer coagulant polymerized silicate containing aluminium sulfate and magnesium sulfate(PAMSS)were prepared. The effects of ratio of magnesium to silicon （Mg／Si）, pH, dosage of flocculant, temperature of the wastewater on phenol removal rate were investigated. The results shown that the removal of phenol is more than 80 ％ when the optimum ratio of magnesium to silicon is 1:1 for PAMSS, the amount of PAMSS added is 11 ml/100ml water, pH value of water is 7，the temperature of wastewater is 40 °C.
Polycarbonate from the Copolymerization of Carbon Dioxide with Epoxide
Authors: Wang Yan Rong , Qin Gang , Cao Shao Kui
Published: June 2012

A novel Schiff complex DSHE-Zn prepared for alternating copolymerization of carbon dioxide and cyclohexene oxide (CHO). DSHE-Zn has been found to be a catalyst for coupling carbon dioxide and cyclohexene oxide to afford alternating copolymer, poly(cyclohexenylene carbonate) (PCHC). The structure of product was investigated by FT-IR and ¹H NMR
Sol-Gel Preparation and Characterization of SiO2/TiO2 Composite Mesoporous Materials with Bacterial Cellulose for Photocatalysis of Methyl Orange
Authors: Xiong Xiao Li , Pei Chong Hua , Li Shu Wei
Published: June 2012

SiO2/TiO2 composite mesoporous materials prepared by sol-gel method with bacterial cellulose（BC）as a surface esteriﬁcation agent and porous template was as photocatalyst in the degradation of methyl orange（MO）in water under UV- irradiation. The results show that the best heat treatment condition is at 600°Cfor 3 h and the optimum content of SiO2 is 30% (30 denotes the weight percent of SiO2). The photoactivity of 30SiO2/TiO2 catalyst prepared with BC was much better than that of reference catalyst prepared with no BC. An addition of BC not only raises the adsorbability of the photocatalyst, but also effectively inhibits anatase-rutile transformation and effectively induce amorphous-anatase transformation of TiO2. The BET surface area of 30%SiO2/TiO2 composite mesoporous materials was the largest. The resulting mesoporous materials showed a high photocatalytic activity for the photodegradation of methyl orange in the UV-irradiation.
Research Nanostructurized Carbon-Containing Catalysts on the тonkeris Clay Base by Physico-Chemical Methods
Authors: Dinistanova Balaussa K. , Tanirbergenova Sandugash K. , Мansurova R.M. , Mansurov Zulkhair A.
Published: June 2012

In this work are presented research results of physical and chemical characteristics of carbon-containing catalysts on Tonkeris clay base. A magnetic property of these catalysts was studied. It was established that the structure of the catalysts are contains а nano-sized carbon particles in a different morphology. Gydrocracking processes were investigated on the bases synthesized catalysts.
Preliminary Research on the Uptake Behavior of Ammonium Molybdophosphate for Cesium and the Corresponding Structural Transformation
Authors: Huang Zhao Ya , Zhang Dong , Tan Zhao Yi
Published: June 2012

In this work, Ammonium Molybdophosphate (AMP) was synthesized and the adsorption of Cs onto it under different initial pH conditions was investigated. The results show the negative effect of the hydronium and hydroxyl irons on the uptake of Cs while the iron-exchange capacity can reach 144.8 mg/g. In addition, the structure differences between AMP samples before and after Cs adsorption were examined by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and Raman technique. The results show that the Keggin structure of AMP stayed unchanged while new bonds arose after the Cs adsorption.
Study on the Defluorinated Materials of High Fluoride
Authors: Chen Rui Yang , Shi Zhan , Zhang Zhen Bin , Liu Miao
Published: June 2012

In our country, high fluoride containing groundwater is general. Now,there have been some study on fluoride containing groundwater, but MgSO4 is the first use. In this paper,therefore,study a new method for removing fluorine from groundwater with MgSO4 , CaO powder regulate pH, studies the influencing factors of fluorine removal rate, such as pH,temperature and so on, obtain the proper treatment condition:8% MgSO4 solution 10ml, CaO powder regulate pH11,stir 5min at 40°C. Using this method, the concentration of fluorine ion in the groundwater is lower than the national provided drinking water criterion of <1.0mg/L, fluorine removal rate reach 93%.
Influence Factors and Kinetic Study on Photocatalytic Degradation of Rhodamine B by Fe-Doped TiO2/Diatomite Composite
Authors: Lin Jun Xiong , Wang Lan , Sun Chong
Published: June 2012

Supported Fe-doped TiO2 has been prepared by a sol-gel method through the use of porous diatomite. The synthesized Fe-doped TiO2/diatomite composites were characterized by SEM and EDX techniques. The composite presented in this study showed higher adsorption and photodegradation ability of Rhodamine B than TiO2/diatomite and diatomite. It was found that the decolorization efficiency were dependent on the operational parameters of pH, photocatalyst dosage and dye concentration, and about 85% of the initial 50 mg/L dye could be adsorbed and degraded in 240 min. Moreover, kinetic study indicated that the photocatalytic degradation process could be described by the Langmuir-Hinshelwood model.
Estimating the Energy Carbon Footprint of Huangshan National Park
Authors: Li Man , Zhang Jin He , Chen Jing , Zhou Jing , Wang Nan Nan
Published: June 2012

Tourism is sensitive to global climate change and greenhouse gas emissions generated by the energy consumption restrict the sustainable development of tourism industry. Methods trying to make the tourism development of sustainability measurable are too confused to be of practical value. To overcome this obstacle, this paper built a Tourism Carbon Footprint Model based on energy consumption structure. With this TCF model, we analyzed carbon footprint of Huangshan between 2006 and 2009. We find that: (1) total carbon footprint of Huangshan increases from 2674.92 hm2 to 3456.76 hm2 at the annual rate of 7%; (2) energy consumption carbon footprint differs significantly in structure. The five kinds of energy carbon footprint, in the descending order, are the electricity, coal, diesel, gasoline, liquefied petroleum gas; (3) analysis of energy consumption carbon footprint shows that Huangshan is sustainable between 2006 and 2009.
Study on the Photocatalytic Degradation of Bisphenol a by La3+ Doping TiO2 under Sunshine Irradiation
Authors: Jin Xing , Lian Jin Lan , Qiao Yu
Published: June 2012

Lanthanum doping TiO2 powders were prepared using sol-gel method, and characterized by XRD. The doping quantity, time of solar irradiation and the added quantity of catalyst were investigated for the influence on the photocatalytic degradation of bisphenol A. The results show the structure of La3+ doped TiO2 powders were anatase, particle size were 16 nm. For the initial concentration of bisphenol A solution were 50 mg/L , when the doping quantity of La were 1.0 wt %, the dosing quantity of TiO2 were3.6 g/L, PH value were acid, irradiation time were 2 h, the photocatalytic activity of TiO2 was the best.
Tensile Properties on Single-Bar Modified Tricot Fabric Reinforced Composites
Authors: Ma Xiao Hong , Qin Zhi Gang
Published: June 2012

Four kinds of single-bar modified tricot fabrics are knitted on a Raschel latch needle warp knitting machine with glass continuous-filament yarns. The glass warp knitted fabric/ unsaturated polyester resin composites are produced by manual molding technology. The tensile properties of composite samples are tested on the universal material testing machine. The stress-strain curves, elastic modulus, fracture strengths of composites are analyzed in the course, wale and diagonal directions. The results show that the tensile stress/strain curves of single-bar modified tricot warp knitted fabric reinforced composites were nonlinear. The tensile properties of composites possess obvious anisotropic characteristics. The values of elastic modulus and tensile strength were in relation to the yarn numbers bearing tensile load in tensile directions
New Closed UV Sterilizer Application of Wastewater Treatment
Authors: Zhang Ji Ku , Dong Zhi Biao , Yang Yan Bin
Published: June 2012

This paper introduces some kinds of UV sterilizers and their characteristics, focusing on system composition, parameter design and characteristics of the new closed UV sterilizer.
The Purifying Capacity and Influential Factors of Wetland Soil to Phenol
Authors: Wang Xue Dong , Ying Li , Zheng Lu Ying , Ma Xue Jiao
Published: June 2012

In order to study the purification ability of reed wetland soil to phenol and its influence factors, the dynamic soil column method and static degradation method was conducted, the results indicated that wetland soil without reed-planted had a high purifying efficiency to phenol. Both the residence time of phenol in soil and the range of particle size affect the purifying efficiency of wetland soil to phenol. Reed can affect purifying efficiency of wetland soil to phenol by changing soil infiltration and physicochemical properties of rhizosphere.
Catalytic Dechlorination of Para-Nitrochlorobenzne in Wastewater through a Nanoscale Nickel-Iron Bimetallic Catalyst
Authors: Niu Shao Feng , Li Chun Hui , Cai Yan Peng
Published: June 2012

In this research, nickel/iron (Ni/Fe) bimetallic nanoparticles were used for the dechlorination of para-nitrochlorobenzene (p-NCB) which could be identified in contaminated soil and wastewater. In the reaction, Ni acted as a collector of hydrogen and the Fe was corroded for producing hydrogen gas. p-NCB was rapidly adsorbed onto the surface of the nanoparticles. Then, p-NCB was degraded to p-CAN and reduced to aniline, or dechlorinated directly to aniline. It was indicated that Ni loading ratio, Ni/Fe mass ratio, and reaction temperature could greatly affect the dechlorination process of p-NCB. Under similar conditions, when 6 g/L of nanoscale Ni/Fe was used, the dechlorination efficiencies reached 25.9 and 100% under 0.5 and 2.0% of Ni/Fe mass ratios, respectively. Thus, a negative linear correlation between the reaction rate and the initial concentration of p-NCB (within a range of 20 to 80 mg/l) could be observed. The reaction activation energy of 94.6 kJ/mol was obtained within the temperature range of 15 to 35 °C.
Study on Scale Inhibition Performance of Polyaspartic Acid Derivative
Authors: Gao Yu Hua , Liu Zhen Fa , Zhang Li Hui , Li Hai Hua
Published: June 2012

Static and dynamic experiments were used to evaluate scale inhibition performance of polyaspartic acid derivative (PASP-SEA-ASP). The static experiments showed that the PASP-SEA-ASP had good scale inhibition performance and the scale inhibition rate exceeded 80% when the PASP-SEA-ASP was 2 mg•L-1 and the solution temperature was 40 OC. In the dynamic experiments, almost no scale formed on the heat transfer surface and the fouling thermal resistance decreases extraordinarily with PASP-SEA-ASP treatment experiment compared with the experiment without treatment. The PASP-SEA-ASP could be used in industrial cooling water systems.
Study the Biodegradation of a Injection Human-Like Collagen Hydrogel
Authors: Du Yu Zhang , Fan Dai Di , Ma Xiao Xuan , Zhu Chen Hui , Zhang Li Jun
Published: June 2012

In this paper, the cross-linking hydrogels were synthesized by EDC crosslinker and Carboxymethyl chitosan (CMCS)/Human-like collagen (HLC). The morphology of the hydrogels was observed by scanning electron microscope (SEM). The important performance of these hydrogels is biodegradation which was assessed in two ways: (1) Through enzyme solution experiment in vitro , investigating in vitro degradation property. (2) Injecting the hydrogels to mice subcutaneous , after 2,4,12,and 24 weeks of healing ,the rats were sacrificed and explanted specimens were prepared for histology analysis. Investigating degradation time in vitro and in vivo , and studying the histology .HLC hydrogels degradation time gets eight to ten months, in addition has good compatibility of the histological performances. The hydrogels are promised for the applications in the biomaterials area.
Synthesis and Characterization of Carboxymethyl Chitosan/Human-Like Collagen Hydrogel
Authors: Wang Yong Hui , Zhu Chen Hui , Mi Yu , Fan Dai Di , Zhang Li Jun
Published: June 2012

Hydrogels were prepared from carboxymethyl chitosan (CMCS)/Human-like collagen(HLC) by S-acetylmercaptosuccinic anhydride(SAMSA) crosslinker. Fourier transform infrared (FTIR) spectroscopy indicated that there exactly existed interaction HLC, carboxymethyl chitosan and SAMSA. The morphology of the hydrogels was observed by scanning electron microscope (SEM). The equilibrium swelling ratio was also evaluated. Cell culture results showed that these hydrogels were good in promoting the cell attachment and proliferation. The hydrogels are promised for the applications in the biomaterials area.
The Influence of Nonlinear Matrix on Mechanical Behavior of Polymer Particulate Composite
Authors: Majer Zdeněk
Published: June 2012

In this contribution the mechanical behavior of polymer particulate composite is studied. A numerical model is created as three phase continuum when a matrix, particles and an interphase are considered. Size of particles and properties of matrix are determined from experiment. A non-linear behavior of matrix is considered in calculations. The main objective is to estimate mechanical response of particulate composite depending on the change in matrix and interphase properties. The results are evaluated for different volume filler fraction of particles. The finite element commercial code ANSYS is used for calculations. Results indicated that by the change of volume filler fraction and properties of matrix and interphase it can be obtained composite with relatively different properties.
The Effect of Heat Treatment on the Microstructure and Mechanical Properties of Multilayered Composites Welded by Explosion
Authors: Prikhodko Elena A. , Bataev Ivan A. , Bataev Anatoliy A. , Lozhkin Vasily S. , Mali Vjacheslav I. , Esikov Maksim A.
Published: June 2012

The structure of composites formed by explosive welding of thin sheets of tool and austenitic steels was studied by structural analysis methods. It is shown that the quenching and tempering of composites leads to the formation of complicated structure containing, along with layers of dissimilar steels, layers with new chemical compositions. Due to the structural changes there is an 2-fold increasing of impact toughness.
The Advantage of Automatic Control in Human-Like Collagen Production by Recombinant Escherichia coli BL21
Authors: Mu Ting Zhen , Luo Yan'e , Fan Dai Di , Zhang Tao
Published: June 2012

Two control models, manual way and automatic way, have been compared during the fermentation process in this study. The automatic way is achieved by a fermentation controller developed by ourselves. Compared to manual way, biomass (OD600) and the production of human-like collagen (HLC) could be increases significantly, reaching to 144 and 7.12g/L respectively. Acetic acid, a key byproduct, is also lowered very obviously. Beside the production controlled by automation model was very stable, the automatic controller can regulate the feeding rate in real time and save labor force.
Structure of Antheraea pernyi/Bombyx mori Silk Fibroin Scaffolds
Authors: Wu Xiufang , Jiao Yu Hong , Liu Gui Yang , Yan Shu Qin , Li Ming Zhong
Published: June 2012

As the tissue engineering scaffolds, the pore structure and condensed structure of silk fibroin scaffolds should be adjusted and controlled. In this study, Antheraea pernyi/Bombyx mori (A. p/B. m) silk fibroin blend scaffolds were prepared by freeze-drying. The influence of blend ratios on the pore structure and condensed structure of the scaffolds was investigated. The results showed that the average pore diameter of the blend scaffolds changed from 56 to 326 μm. Due to the difference of properties and the macromolecules aggregation status of two silk fibroin solutions, the pore diameter, content of α-helix and crystallinity of the scaffolds decreased with the increasing of the proportion of B. m silk fibroin. By adjusting the blend ratios, the pore structure and condensed structure of A. p/B. m silk fibroin blend scaffolds could be controlled.
Optimization of the Extraction of Coconut Protein and the Evaluation of Antioxidant and ACE Inhibitory Activities of its Enzymatic Hydrolysates
Authors: Liu Zhe , Shen Xuan Ri , Yu Yang , Wang Yao , Li Peng
Published: June 2012

The extraction of proteins from coconut meat was performed utilizing alkaline extraction. On the basis of single factor experiment, an orthogonal experiment was designed to optimize the extraction conditions (including extraction time, temperature, NaOH concentration and liquid to solid ratio). The highest extraction rate (7.3%) was obtained at 120 min, 45 °C, 0.1 M and liquid-solid ratio 25:1. Coconut protein was consequently hydrolyzed with four commercial enzymes (alcalase, trypsin, pepsin, papain). Furthermore, activities of hydrolysates on DPPH radical scavenging and ACE inhibition were assayed respectively. The results indicated that pepsin hydrolysate exhibited the highest DPPH radical scavenging activity (100%, 1 mg protein/mL), and trypsin hydrolysate possessed the most potent ACE inhibitory activity (40.2%, 1 mg protein/mL).
Preparation and Electrospinning of Acidified-Oxidized Potato Starch
Authors: Wang Hong Jie , Jin Xin , Wang Wen Yu , Xiao Chang Fa , Tong Lin
Published: June 2012

This paper investigates the preparation and electrospinning of acidified-oxidized potato starch. In this article, acidified-oxidized potato starch was prepared by adding ammonium persulfate as an oxidizing agent and hydrochloric acid as a catalyst. The effect of reaction time, temperature, the concentration of hydrochloric acid and the content of ammonium persulfate on the viscosity and content of carboxyl were discussed. The optimum reaction conditions were as follows: 1.5 hours ,50°C, 0.5mol/l HCl, 2.5% (NH4)2S2O8. And then, the acidified-oxidized potato starch prepared at the optimum condition was dissolved in dimethyl sulfoxide (DMSO) to be electrospinned by contrast to native starch. Electrospinning of 5wt%-21wt% of modified starch in DMSO produced beads, beaded fibers, and smooth fibers, depending on the concentration range. Smooth fibers were observed until the concentration reached 19wt%, while native starch was 5wt%.
Formation of Silkworm-Like Vaterite via Orientated Attachment Process
Authors: Liu Jun , Wang Xiao Hong , Zhang Qun , Guan Ye Bin
Published: June 2012

Worm-like vaterite crystals were directly formed via an oriented attachment progress from nanocrystals in the presence of 50% volume ration of dimethyl sulfoxide (DMSO) at ambient temperature. The complex and unusual morphogenesis of the precipitated vaterite under ambient experimental conditions may imply that a simply synthesis routine which can be provided for certain materials with special morphologies.