bluuebunny/crossref_metadata_2025_split huggingface dataset:
“Mist Polymerization” Method for Fabricating Superhydrophobic Cotton Fabrics
Authors: Liu Xiangdong , Li Lin 
Published: March 2020

Abstract
Recently, our group developed a surface modification technology using “mist polymerization” to fabricate functional cotton fabrics. The “mist polymerization” method have both the advantages of liquid-phase and gas-phase reactions: less damages on the structure of the matrix material, very fine and controllable layer, wide applicable monomer range, and small monomer dosage. Here, I summarize recent works on the application of the “mist polymerization” method to fabricate superhydrophobic fabrics.
Preparation of pH-Sensitive β-Cyclodextrin Derivatives and Evaluation of Their Drug-Loading Properties
Authors: Jiang Liye , Liu Xiaofang , Xuan Guangshan 
Published: March 2020

Abstract
Hydroxypropyl β-cyclodextrin (HP-β-CD) is widely used in the encapsulation of drugs and the increase of solubility of poorly soluble drugs. The modified hydroxypropyl cyclodextrin can make cyclodextrin have pH and temperature sensitive and other characteristics. The purpose of this study was to oxidize and crosslink HP-β-CD to prepare a derivative of the network structure and evaluate its drug-loading properties. First, the βcyclodextrin with aldehyde group was obtained by periodate oxidation, and then crosslinked with different ratios of ethylenediamine (EN) to obtain a network structure of hydroxypropyl β-cyclodextrin derivative (EN-HP-β-CD). The β-cyclodextrin derivatives were characterized by FT-IR, DSC, XRD and SEM. Vitamin E (VE) was used as a model drug to study the solubilization effect, phase solubility and in vitro release behaviour under different pH conditions. The results showed that EN-HP-β-CD could significantly improve the solubility of VE, and 1:1 EN-HP-β-CD could increase the solubility by 25 times. In vitro release experiments under different pH conditions within 24 h showed that the cumulative release at pH 4.5 was 78.25%, which was significantly higher than the pH 7 release effect (43.94%). The result indicated that EN-HP-β-CD had solubility increasing effect and pH-sensitive properties.
Activated Carbon Developed from Amygdalus Pedunculata Shell for Cephalexin Removal: Kinetics and Equilibrium Study
Authors: Xiong Rongrong , Bai Qiuhong , Li Shaoni , Shu Yu , Chen Bang , He Li , Shen Yehua 
Published: March 2020

Abstract
Cephalexin (CEX) is widely used in aquaculture, animal husbandry, agriculture and forestry and other areas due to its wide antibacterial, high efficacy curative and less allergic reaction. However, exposure of antibiotics to the environment destroys the micro-ecological balance and leads to an increase in bacterial resistance. Herein, low-price and high-efficiency activated carbon (AC) was produced from Amygdalus pedunculata shells (APS) by phosphoric acid and zinc chloride activation. The as-obtained AC shows high specific surface area of up to 1, 810 m2 g−1 and 1, 688 m2 g−1 prepared by ZnCl2 and H3PO4 activation, respectively, and contains hierarchical sturcture of interconnected macro-, meso- and micropores. The maximum adsorption capacity for CEX based on the Langmuir model are 199.60 and 149.03 mg g−1 by ZnCl2 and H3PO4 methods, respectively. Therefore, the present AC produced from APS has potential as a low-cost adsorbent for CEX.
Fluorescence of CQDs Synthesized by Hydrothermal Method
Authors: Li Huiqin , Deng Cui , Yan Shaotian , Dou Shumei , Zhao Weiwei 
Published: March 2020

Abstract
Carbon quantum dots (CQDs) are widely used in biological imaging, biosensors and nanocaterials. Because of their good optical properties, biocompatibility, low toxicity, easy surface functionalization and other advantages. In this paper, Carbon quantum dots was prepared by one-step hydrothermal method with glucose as carbon source. The effects of the reaction time and the reaction temperature were investigated. The morphology of CQDs was observed by transmission electron microscopy and their structural properties were characterized using fluorescence spectrum, Fourier transform infrared spectrum and uv-visible spectrum. The experimental results show that CQDs with good performance is synthesized successfully by this method, and the synthesized CQDs has the best performance at 180°C and 8 h.
Study on Degradation of Azithromycin Antibiotics by Molybdenum Sulfide Graphene Oxide Composites under Visible Light
Authors: Li Changyan , Jin Huihui , Hou Zepeng , Guo Yan 
Published: March 2020

Abstract
Waste water including azithromycin antibiotics could cause environment to generate antibiotics bacteria, which heavily damage the ecological balance. It is necessary to study the degradation of azithromycin antibiotics. Molybdenum sulfide graphene oxide composites were synthesized by hydrothermal method. Owing to their better conductivity, the photocatalytic performance of molybdenum sulfide graphene oxide composites for azithromycin was evaluated in the visible-light range. The results show that the degradation rates of molybdenum sulfide and molybdenum sulfide graphene oxide composites to 100 mg/L azithromycin were 87% and 75%, respectively after 180 min of visible light irradiation. Molybdenum sulfide graphene oxide composites show better azithromycin degradation property.
Effect of Boron on Microstructure and Properties of Ultra-Low Carbon Steel
Authors: Ruan Shipeng , Zhao Aimin , Wang Lijun 
Published: March 2020

Abstract
The effect of boron on microstructure, mechanical property and conductivity of ultra-low carbon steel wire rod with diameter 6.5 mm was studied. The results show that boron has little influence on the grain size and mechanical property of ultra-low carbon steel wire rod when adding 0.0020% boron alone and under the same process conditions; but when 0.0055% boron is added, the ASTM grain size number of the wire rod is coarsened from the 7.5 grade to 6 grade, at the same time, the tensile strength is reduced by 20 MPa and the electrical conductivity is increased from 16.2%IACS to 16.3%IACS. The effect of Boron on tensile strength is mainly caused by coarsening grain diameter. The effect of boron on grain diameter is related to [B]/[N], when the [B]/[N] is relatively high(for example 1.34), the grain diameter growth is obvious, conversely, when the [B]/[N] is relatively low(for example 0.44), the grain diameter growth is not obvious.
A Three Dimensional Conductive Matrix of Activated Carbon Coated Copper-Cobalt Prussian Blue Material for Sodium Ion Supercapacitors
Authors: Xu Song , Wan Tao , Zhou Kaibin , Huang Haibo , Zhou Ting , Mao Wenqi , Wei Jiaqiang , Gong Shangkun , Liu Tong 
Published: March 2020

Abstract
In this work, a three dimensional (3D) conductive material of activated carbon coating Copper-Cobalt Prussian Blue (PB) is synthesized and applied on sodium ion supercapacitors. The activated carbon is proved able to enhance the conductivity, prevent structural collapse during sodium ion deintercalation, reduce interstitial water in PB crystals as well as special hindrance, and improve electrochemical performance of super capacitors dramatically. It is demonstrated that a specific capacity of 90.4 F g−1 and and power density of 4.3 kW kg−1 as well as energy density of 65.1 Wh kg−1 are achieved for CuCoHCF@ AC//AC device. In addition, 90% % starting value are retained for the specific capacity after 2000 cycles operation.
Characterization of Ethylene-butene Polyethylene Copolymers by DSC and SSA
Authors: Li Rui , Yang Guoxing , Liu Li 
Published: March 2020

Abstract
Two copolymers of M1 and M2 were studied by DSC and SSA. The SSA test was applied to characterized the distribution of methylene sequence length (MSL) in the M1 and M2 copolymers. The butene comonomer contents of M1 and M2 were 4.66 mol% and 4.83 mol%, respectively. The content of butene comonomer of M1 and M2 is low, and the distribution of MSL increases monotonously with that of MSL. The longest MSL of M1 is 195.4, and the mole fraction is 0.96%, which is higher than M2. The influence of MSL and distribution on the crystallinity and Tm is greater than that of the total monomer content, which are different with traditional opinions.
Fabrication and Photocatalytic Performance of CQDs/Co-g-C3N4 Heterojunction
Authors: Qiu Lingfang , Zhou Zhiwei , Qiu Xiaobin , Ma Mengfan , Li Ping , Duo Shuwang 
Published: March 2020

Abstract
A novel heterojunction photocatalyst by loading CQDs on Co-g-C3N4 was synthesized by simple hydrothermal process successfully. The crystal phase, surface chemical component and optical properties of CQDs/Co-g-C3N4, Co-g-C3N4 and g-C3N4 were analyzed based on characterizations such as XRD, FT-IR, DRS and PL. The effect of CQDs loading ratio on the properties and photocatalytic performance of the composites was investigated in detail. The optimized CQDs/Co-g-C3N4 (mass ratio of CQDs and Co-g-C3N4 was 0.12%) showed wide visible light adsorption within the wavelength of 800 nm. Moreover, it showed an improved RhB photodegradation efficiency which was 40.9% and 68.3% higher than the value of Co-g-C3N4 and g-C3N4, respectively. The higher photocatalytic activity of CQDs/Co-g-C3N4 should be ascribed to the effective separation of photo-induced carriers.
Enhanced Photocatalytic Performance of g-C3N4 Decorated with MOF-Derived Hollow ZnS Polyhedrons
Authors: Si Ying , Zhang Xiaoxian , Liang Tingting , Duo Shuwang , Liu Huan , Li Ping 
Published: March 2020

Abstract
The low separation rate of photo-generated e−-h+ pairs is one of the important elements leading to poor performance of semiconductor photocatalysts. The construction of heterojunctions is an effective method to separate e−-h+ pairs. For the purpose of addressing the efficient visible light driven photocatalysts, we construct a g-C3N4/ZnS heterojunction by a facile in-situ synthetic method. The as-obtained productions were characterized by XRD, UV-vis DRS and PL. Different weight ratios of g-C3N4/ZnS were prepared and g-C3N4/ZnS-8:1 displayed the highest photo activity for MO degradation. It is capable of declining 74.4% of MO within 160 min, •O2
− and h
+
play a most important function in the reaction. The enhancement of photocatalytic performance is ascribed to the formation of heterojunction, which promotes the separation of photo-generated e−-h+ pairs.
Delay-Enhanced Synchronization in Two Coupled Chaotic Light-Emitting Diodes
Authors: Qin Qing , Zhang J , Guo T 
Published: March 2020

Abstract
In a light-emitting diode (LED) with ac-coupled nonlinear optoelectronic feedback, chaos can occur within a wide range of the voltage threshold parameter. When two identical such LEDs are coupled without delays, with increase of the coupling strength, transitions occur from anti-phase synchronization of periodic spiking to complete synchronization of chaos. Here we present that a coupling time-delay enhances chaos synchronization with small coupling strengths. The numerical simulations with bifurcation diagrams demonstrate the underlying mechanisms.
Study on Preparation and Photocatalytic Activity of V-Doping Mixed Crystalline Phase TiO2 Powders
Authors: Peng Fuchang , Lai Qi , Zhong Junbo 
Published: March 2020

Abstract
The vanadium-doping TiO2 photocatalysts powders with different vanadium contents were prepared by a facile sol-gel method. The TiO2 powders were characterized by PL, XRD, UV-Vis-DRS and Laser particle size analyzer. The photocatalytic performance was valuated by photo-degradation of methyl blue. The degradation effect of MB was investigated on the influence of heat treatment temperature and vanadium doping amount. The results show that V-doping can promote the TiO2 particles phase transformation from anatase to rutile and restrain the particles size growth. The V-TiO2 sample is a mixture of rutile phase and anatase phase with good crystallinity. The sample of V-TiO2 particle size distribution is relatively uniform and narrow. The absorption spectrum of TiO2 after doping has obvious red shift compared with that before doping. V-doping can inhibit the recombination of photogenerated e−/h+ pairs. The photocatalytic activity of V-TiO2 with n(V): n(Ti) =1: 100 and calcined at 450 °C is the best, it is 57% in 100 minutes under the irradiation of fluorescent lamp. It is obviously higher than the activity of undoped TiO2 powders.
Structure and Dyeing Properties of Cotton Fabric Modified by Protein from Waste Feathers
Authors: Zhang Li , Li Hong , Zhu Jionglin , Yan Jun 
Published: March 2020

Abstract
The waste feather protein was extracted as modifier to modify cotton fabric. The modified process was selected: the mass fraction of the protein modifier was 4% (weight to the fabric), the mass fraction of the cross-linking reagent was 2%, the processing temperature was 70 °C, and the processing time was 60 min. The structure of the cotton fabric modified was analyzed by infrared spectrometer, scanning electron microscope, XRD and thermogravimetric analysis. The dyeing mechanism and properties of natural naphthoquinone dyes on the cotton fabric modified were analyzed. The results showed that the feather protein grafted onto the cotton fabric by the cross-linking agent. The cross-linking reactions occurred mainly in the amorphous area of the fabric. Furthermore, the dyeing properties of natural naphthoquinone dyes were significantly improved by protein cross-linking agent. The K/S value increased from 1.27 to 7.05 and the color fastness to dry and wet rubbing improved by about one grade.
A Method of Electroless Silver Plating on the Surface of PA6 Fiber
Authors: Chen Ming 
Published: March 2020

Abstract
A layer of silver was deposited on the surface of PA6 fiber fabric by electroless plating method to prepare silver/PA6 conductive fabric. The surface morphology and structure of the coating were analyzed by SEM and EDS. Electroless plating process conditions: 11 g/L silver nitrate, ammonia and sodium hydroxide appropriate preparation into 1.1% silver ammonia solution. Ingredients of reducing agent: glucose 10 g/L, tartaric acid 2 g/L, ethanol 100 ml/L, pH 11-13 was adjusted by adding 10 g/L sodium hydroxide solution, temperature 20-30 °C, reaction time 3min.The resistance of the preparation of silver/PA6 fabric is less than 1 Ω/cm, elemental silver content is 100%, the conductivity is excellent, and the electromagnetic radiation resistance is excellent.
Synthesis and Characterization of Cationic Waterborne Epoxy Acrylic Resin
Authors: Liu Hongbo , Xue Xiaowu , Zhang Wuying , Lin Feng 
Published: March 2020

Abstract
In this work, a cationic waterborne epoxy acrylic resin (WCEA) was synthesized from bisphenol an epoxy resin, acrylic acid, acrylic acid, hydroquinone as an inhibitor, and N, N-dimethylbenzylamine (DMBA) as a catalyst. The changes of NCO groups and acid value during the synthesis process were measured by chemical titration method, and its Fourier Transform Infrared (FTIR) spectra were investigated. The results indicate that the acidified waterborne resin has great water solubility and storage stability after grafting the half-blocked isocyanate.
Formation of Multiple Networks in Cis-1, 4-Polybutadiene: Dynamical Viscoelasticity, Gel Content and Cross-Link Density
Authors: Zhai Junxue , Li Xiang , Zhai Jinting , Zhang Ping , Zhao Shugao 
Published: March 2020

Abstract
The formation of multiple networks of cis-1, 4-polybutadiene rubber (BR) with sulfur and carbon black (CB) were discussed by analysing the curing curve, gel content, cross-linking density (XLD) and dynamic viscoelasticity. XLD and gel test show the network from chains entanglement and sulfur cross-link existing in unfilled BR, in addition there is another network from CB in filled BR. Networks from sulfur and CB cross-links has two different peaks of loss modulus (G”) and loss tangent at different dynamic strain. Furthermore, the average bonding number of each chain to form the network is calculated from the sulfur cross-link density. There is two percolation of G‘0.01Hz or gel content as the average bonding number increased in curing.
Study on Microstructure and Corrosion Resistance of AlCoCrFeNiTi(x) High-Entropy Alloys
Authors: Huang L , Wang X J , Huang B X , Wang C Z 
Published: March 2020

Abstract
AlCoCrFeNiTi(x) (x=0, 0.4, 0.8, 1.0) high entropy alloys (HEAs) were prepared by vacuum arc melting furnace. The results showed that AlCoCrFeNiTi(x) HEAs transformed from a single body-centered cubic structure (BCC) to two kinds of body-centered cubic structures accompanied by a small amount of Laves phase with the increase of Ti content, and the morphology of alloy structure changed from dendrites to the petal-like equi-axed crystals. In addition, the alloy with the content of 0.4 mol. % Ti has a corrosion potential of -0.335V and a minimum corrosion current density of 7.36×10−7 A/cm2, which indicated that the HEAs with the content of 0.4 mol.% Ti has the best corrosion resistance.
Study on Atom Packing and Electrical Properties of Tin (n=2-10) Clusters with GA&DFTB Calculations
Authors: Yu N , Geng Y , Zhang L 
Published: March 2020

Abstract
The researches of atom packing and electronic properties of titanium clusters are of great significance in producing highly pure Ti particles. The geometrical structures as well as electronic properties of Tin(n=2-10) clusters were obtained by using density functional tight binding (DFTB) simulations being combined with genetic algorithms (GA). The binding energy, the second differences in energy, HOMO-LUMO gap, and Mulliken populations were calculated and discussed. The results show that these Ti clusters containing three or less atoms have planar structures or a linear form, while those containing more than four atoms present three-dimensional geometries. There exist different packing structures including tetrahedron, octahedron, and decahedron. As the atom number increases in these clusters, the configures are formed by capping the atoms on the (111) facets of these clusters with octahedron and decahedron geometries. The binding for the electrons is stronger in the icosahedral cluster than that in those clusters having the other configurations. Mulliken populations present significant differences as the atom packing changes in these clusters.
Semi-Analytical Correlation for Pool Boiling Heat Transfer Using Nanofluids Based on Fractal Theory
Authors: Li Yuexiwei , Long Xiaobo , Fan Xingxiang , Liu Zhennan , Liu Cong , Zhang Songyuan 
Published: March 2020

Abstract
On the basis of fractal dispersion of active nucleation sites on boiling surface, a revised fractal model for nucleate pool boiling of nanofluids was established incorporating microlayer evaporation, nature convection and transient conduction. It has fewer empirical constants than that of traditional ones. Results of model using pure fluids and nanofluids conform to data from previous investigations. Thus, accuracy of model is verified. Effects of liquid properties and contact angle on pool boiling heat transfer coefficient (HTC) using nanofluids are discussed according to the present model. It is found that the HTC of nanofluid and the fractal dimension of nucleation sites decrease with the decreasing contact angle. The effect of liquid properties enhancement due to the presence of nanoparticles, has ignorable influence on HTC of dilute nanofluids while the decreased contact angle plays a more important role. It is also found that the surface with lower contact angle had a higher natural convection component.
Experimental and Constitutive Model Study on Dynamic Mechanical Behavior of H96 Brass Alloy
Authors: Zhou Ping , Luo Xiangyan , Liu Baojun 
Published: March 2020

Abstract
To study the mechanical response of H96 brass, the quasi-static and dynamic compression experiments were performed by the universal-testing machine and the split Hopkinson pressure bar system. The selected temperature range was 293 K ∼ 873 K, the selected strain-rate range was 0.001/s ∼ 6000/s and the strains were up to 0.6. It was shown that, this alloy has remarkable strain hardening character, and this alloy is sensitive to strain-rate and temperature. In addition, the Dynamic Strain Aging phenomenon of this alloy occurs under the condition of 473 K and 0.001/s. According to the testing results and the thermal-activation dislocation mechanism, a plastic flow constitutive model was brought forth. This constitutive model can predict and describe the plastic flow behavior of H96 brass alloy in a wide range of temperature and strain rate.
Laboratory Experimental Research on Foamed Warm Mix Asphalt Mixture Road Property
Authors: Gao Kaikai , Chen Fang , Kuai Haidong , Yang Zhengxun , Si Yi , Huo Zhiqiang 
Published: March 2020

Abstract
To verify the foamed warm mix asphalt mixture road property, the article formed foaming warm mix asphalt mixture, Sasobi-LM warm mix asphalt mixture, ordinary hot mix asphalt mixture test piece, comparative analysis of different asphalt mixture The resistance of high temperature to rutting, shear resistance, resistance of low temperature crack, water stability and fatigue properties, and comparative economic analysis. The results show that the resistance of low temperature crack, water stability and shear resistance of foamed warm asphalt mixture surpass Sasobi-LM warm asphalt mixture, but slightly lower than ordinary asphalt mixture; The resistance of high temperature rutting and fatigue resistance of the mixture is lower than that of Sasobi-LM warm mix asphalt mixture; through economic analysis, the economical efficiency of foamed warm mix asphalt mixture surpasses the economical efficiency of the Sasobi-LM warm mix asphalt mixture, lower than the ordinary hot mix asphalt mixture, it is recommended to choose construction in special areas.
Crack Control Technologies of Mass Concrete
Authors: Du Chunhao , You Qiang , Gu Xin , Peng Yiliang 
Published: March 2020

Abstract
With the rapid development of national economy, a variety of large-scale complex projects continue to emerge, resulting in the pouring of mass concrete has become an important part of the construction process. Due to various stress factors, cracks are easy to occur in mass concrete construction, which will not only affect the aesthetic performance of construction projects, but also their quality. Therefore, it is necessary to strengthen and control the construction of mass concrete for construction projects. This paper introduces crack prevention technology of mass concrete, including construction technology analysis, cause analysis and control measures. Through the literature review, the research status of related fields can be understood, thus providing theoretical basis for the future relevant projects.
Experimental Study and Finite Element Analysis of Externally Prestressed RPC Box-Girder with Corrugated Steel Webs
Authors: Ao Deng , Xu Qiang 
Published: March 2020

Abstract
Prestressed normal concrete (PC) box-girder with corrugated steel webs has been widely used in bridge engineering because of its favourable properties and wins general recognition of bridge practitioners, but researches on externally prestressed reactive powder concrete (RPC) box-girder with corrugated steel webs are still rare. In this paper, the experiment and ABAQUS finite element analysis considering materials nonlinearity are performed to study the mechanical properties of externally prestressed RPC box-girder with corrugated steel webs during its whole bending process. The experimental results show that compared with externally prestressed normal concrete (PC) box-girder with corrugated steel webs, the externally prestressed RPC box-girder with corrugated steel webs has higher ultimate bearing capacity, higher cracking strength, better anti-cracking performance and durability. The ABQUS finite element analysis results have good agreement with the test results and the model of this article for the analysis of the whole bending process of externally prestressed RPC box-girder with corrugated steel webs is feasible.