bluuebunny/crossref_metadata_2025_split huggingface dataset:
Fabrication and Properties Detection of PLA-CNTs Hybrid Film Based on a Phase Inversion Method
Authors: Yu Kai , Hu Xueyan , Su Ya , Xu Jiahong , Liu Fangyu , Kang Yue , Song Kedong 
Published: April 2023

Abstract
Carbon-based nanomaterials have been extensively studied as scaffolds for neural tissue regeneration. In particularly, carbon nanotubes (CNTs), was most widely applied in neural tissue engineering due to their excellent electrical conductivity and good biocompatibility. In this study, the CNTs were introduced into the pure PLA film, to optimize the function of PLA film for further application. The PLA-CNTs film with CNTs content of 0%, 0.2%, 0.4% and 0.6% were prepared by a phase inversion method, respectively. Following this, the morphology and mechanical properties of the films were both evaluated. The results illustrated the CNTs were uniformly dispersed on the film surface and increased the surface roughness. The film had microporous structure on the cross section, which was not effect by the CNTs. Meanwhile, the critical tensile stress of the film increased from 14.0±3Mpa to 19.7 ±2Mpa, but the elastic modulus of PLA-CNTs hybrid film was no significantly changes. It is a preliminary study about fabrication and characterization of PLA-CNTs film.
Preparation and Characterization of a Novel Tissue-Engineered Blood Vessel of dECM/CS/Gel Bilayer Scaffolds
Authors: Du Jing , Liu Jiaqi , Suo Qiang , Ji Yunfang , Wang Yujie , Kang Yue , Li Xiangqin , Song Kedong 
Published: April 2023

Abstract
At present, decellularized extracellular matrix (dECM) has become a popular research material worldwide due to its good biocompatibility in the research of small-diameter tissue engineering blood vessels (diameter ≤6mm). In this study, the cells of porcine coronary artery were removed by acellular method to obtain dECM, which was coated with chitosan (CS)/gelatin (Gel) mixed hydrogels with different concentrations to bionic the natural blood vessel’s multilayer structure. The mechanical properties, microstructure, and biocompatibility of scaffolds were characterized. The experiment result showed that the bilayer scaffolds with different proportions were successfully constructed by this method, and the outer layers and inner layers of scaffolds were closely connected, and the pores were evenly distributed. The critical tension and elastic modulus of the five scaffolds showed no significant difference, and all scaffolds had good biocompatibility.
Research of Forming Microstructure of Copper/Graphite Composite Coating Prepared Based on Laser Micro-cladding
Authors: He Hongjun , Su Shaoxing , Dong Tianyuan , Song Wuyu , Lang Wenchang , Wei Xinlei 
Published: April 2023

Abstract
In order to further study the forming process and evolution mechanism of new copper / graphite composite coating based on laser microcladding technology, three groups of alloy powder materials with different proportions were set up, and the 1500W fiber laser was used to prepare micro-cladding coatings on 45# steel substrates. According to the known macroscopic morphology, four groups of cladding samples with uniform, smooth and dense surface were selected for analysis, the microstructure characteristics, element distribution and growth morphology, and the causes of microstructure defects were qualitatively and quantitatively analyzed by means of the metallographic test, SEM and EDS.On this basis, the relationship between the interfacial reaction mode affected the forming microstructure of micro-cladding coating and the flow behavior of molten pool was obtained, which can be used as a reference for the optimization and regulation of the process.
Outgassing Rates and Compositions of the Released Gases from Optical Fiber Panel and Photocathode Glass Used for Low-light-level Image Intensifiers
Authors: Guo Xin , Pang Yan , Deng Ningkang , Yuan Yuan , Hu Wenbo , Bu Renan 
Published: April 2023

Abstract
To analyze the vacuum failure mechanism of low-light-level image intensifiers in depth, the outgassing rates and compositions of the released gases from optical fiber panel and photocathode glass used for the image intensifiers were investigated by static pressure-rising method and residual gas analysis. The investigation results show that the outgassing rate of the optical fiber panel at a baking temperature of 150°C is only about one order of magnitude higher than that at 23°C, while the outgassing rate of the photocathode glass at 150°C is about two orders of magnitude higher than that at 23°C. As the static accumulation time of gas releasing extends, the outgassing rate of the optical fiber panel linearly increases at 23°C, and it remains basically unchanged at 150°C, while for the photocathode glass, its outgassing rate increases rapidly firstly and then tends to be stable gradually both at 23°C and 150°C. The gas compositions released from the optical fiber panel and photocathode glass at 23°C mainly include H2O, H2, N2/CO and CO2. After experiencing the vacuum baking at 150°C, the releasing ratio of H2O gas from the optical fiber panel decreased just slightly, which indicates that the vacuum baking degassing for the photocathode glass is relatively difficult; by contrast, the releasing ratio of H2O gas from the photocathode glass significantly decreased, and that of H2 gas obviously increased. These results can provide experimental bases for further optimizing the component materials and fabrication process of low-light-level image intensifiers.
Crystal Structure Analysis of Different Flame Retardant Copolymers
Authors: He Feng , Liu Qinghua 
Published: April 2023

Abstract
In this paper, through the DSC rising and cooling scanning and non-isothermal crystallization tests of different flame retardant copolymers, the crystallization process of four types of copolymers formed by adding different flame retardants such as CEPPA, DDP, Carbon-dots (gCDs), and MOF materials was studied. Also, the crystallization kinetics and crystal structure were explored. The results showed that the flame retardant effect of the flame retardant copolymer was improved after adding gCDs. The subcooling temperature (ΔTmc) values of MOF material and CEPPA were both higher than those of the DDP flame retardant copolymer after the addition of carbon dots, indicating that the introduction of the carbon-dots material made crystallisation easier. With the increase of carbon dot content, the value first increases and then decreases, indicating that the crystallization is the easiest when the content is 1%, and 1% gCDs+8% DDP has a higher crystallization ability. Pure DDP has the highest mc values, which also shows good spinnability. Also, the cooling rate strongly influences the crystallisation process, with crystallisation being more rapid when the crystallisation rate is higher. Also, the cooling rate strongly influence the crystallisation process, with crystallisation being more rapid when the crystallisation rate is higher.
Preparation of the Acenaphthene Phenyl Silicone Oil with Vinyl and Its Effent on Silicone Rubber Vulcanized at Room Temperature
Authors: He Xiaofeng , Guo Fuqiang , Ge Tiejun , Tang Kaihong , Shi Shengnan , Geng Maofu 
Published: April 2023

AbstractThe acenaphthene phenyl silicone oil with vinyl (AEPSV) was synthesized by Diels-Alder reaction with polyvinyl siloxane (SV) and acenaphthylene cyclopentadienone (AECPO). The structure was characterized by means of FT-IR and1H-NMR. Then added its into the silicone rubber as the heat-resistant additive. And the influence of content on the heat resistant and mechanical properties of silicone rubber were studied. The results showed that when the mass fraction of heat-resistant additiv was 9%, the initial degradation temperature of silicone rubber was 431.85°C.
Optimization Design and Fatigue Lifetime Analysis for Elastic Wheel of Low-floor Trams Using in Urban Rail Transit
Authors: Zhao Rongguo , Ye Duheng , Lin Sheng , Hu Weihui , Xiao Xianglong , Liu Yonglin , Mohammad Zaheer 
Published: April 2023

Abstract
Elastic wheel is an important component of the low floor tram using in urban rail transit, so it is of significance to optimize its structure and predict its service lifetime. Firstly, the fatigue characteristics of rubber material are studied based on the crack energy theory, and a finite element model of an elastic wheel for fatigue lifetime prediction is constructed. The numerical simulation results show that the fatigue lifetime of such a elastic wheel does not match with the expected one. Secondly, based on the orthogonal numerical test and the Sobol model, an improved sensitivity analysis method is proposed. Taking the minimum strain as an optimization objective, and selecting the structural parameters determined by the sensitivity analysis method as the design variables, the second-order response surface model is established, and the multi-island genetic algorithm is used to carry out the single objective and multi-factor optimization design of the rubber bodies of elastic wheel under the condition of stiffness constraint. The simulation results of the elastic wheel show that the fatigue lifetime of the optimized structure is 30% higher than that of the original one. Finally, the optimized elastic wheel is tested, and the results show that the stiffness coefficient, and the fatigue lifetime as well, are all satisfy with the design requirements.
Lightweight Optimization Design and Fatigue Lifetime Analysis for Anti-rolling Torsion Bar of Rail Vehicle
Authors: Zhao Rongguo , Liu Yonglin , Liu Wensong , Ye Duheng , Tang Lianyi , Xu Lingpeng , Mohammad Zaheer 
Published: April 2023

Abstract
Based on the fatigue strength assessment method in the FKM standard, the lightweight design of a type of anti-rolling torsion bar is studied by using the finite element method. Firstly, the finite element model of the torsion bar structure is constructed by using the Creo software and the HyperMesh software, and then the finite element analysis is carried out by using the ABAQUS software. The numerical simulation results indicate that under the condition of ultimate load 29.2kN, the static strength, anti-rolling stiffness and fatigue strength of the torsion bar are all satisfy with the design requirements. Secondly, the orthogonal numerical test method is utilized to investigate the influence of geometric parameters on the anti-rolling stiffness and Factor of Strength (FOS) value of the torsion bar. Taking the structural geometric parameters as variables and the FOS value as the objective function, a second-order response surface model is established. The single objective and multi-factor optimization design for the torsion bar under the condition of stiffness constraint is conducted by using the Isight software and multi-island genetic algorithm. The results show that, comparing with the original structure, the weight of the optimized structure is reduced by 20.89%, and the static and dynamic strength, and anti-rolling stiffness of the optimized structure are match with the design requirements. Finally, the static and dynamic strength tests for the optimized torsion bar are individually operated at the ultimate load and under two-stage cyclic loading with amplitude 18.0kN and 29.2kN. the results show that the calculated stiffness coefficient is consistent with the test one, and the service lifetime of the torsion bar is satisfy with the design requirement.
Simulation of Temperature Field in FSW of 6061T6 Aluminum Alloy IGBT Liquid Cooled Radiator Panel
Authors: Chen Xinghui , Zhang Hongshen , Huang Gan 
Published: April 2023

Abstract
Heat input and temperature field distribution in the welding process are crucial to welding quality. The parameters in the FSW process are optimized to study the influence of the temperature field on a car Insulated Gate Bipolar Transistor(IGBT) liquid cooled radiator panel 6061T6 aluminum alloy under friction stir welding. This paper established the liquid cooled radiator panel with friction stir welding fully coupled thermo-mechanical model, and explored the thermal physical parameters of 6061T6 aluminum alloy based on JMATPRO. Then, the temperature field distribution rules of friction stir welding at the inlet of liquid cooling plate and the weld joint under different welding time are explored by using ABAQUS. The effects of different rotational and welding speeds on the temperature field of the welded joint are also studied. Results show that most of the heat in the FSW process is generated by the shaft shoulder of the tool, and the heat at the welding position is a conical shape. Under the assumption that other technological parameters remain unchanged, the rotational speed of the pin is the most important factor affecting the temperature field of the FSW process.
Research and Improvement of Heat Transfer Performance of Plate and Shell Evaporator
Authors: Huang Jiarui , Zou Tonghua , Liu Zhe 
Published: April 2023

Abstract
Evaporator plays a key role in indirect refrigeration system, so improving the efficiency of evaporator is of great significance to improve the overall performance of refrigeration system. For the plate and shell evaporator, the reliability of the model is proved by numerical simulation of the existing evaporator and comparison with the experiment. An improved scheme is proposed for the existing evaporator, and the improved model is simulated and analyzed. The result shows that compared with the previous model, the improved model improves the heat exchange efficiency, reduces the pressure drop, and improves the overall efficiency of the evaporator.
Fabrication and Toxicity Assessments of A Novel Antibacterial Polyvinyl Alcohol/Polyionic Liquid Hybrid Membrane
Authors: Wang Hao , Hu Xueyan , Su Ya , Xu Jie , Fang Huan , Liu Jiaqi , Kang Yue , Li Xiangqin , Chen Zhen , Song Kedong 
Published: April 2023

Abstract
Poly ionic liquids (PILs) have become important choices as antibacterial agents because of their excellent biological properties and abundant species. Development of new antibacterial materials with PIL has been a feasible and popular research topic. In this paper, the Polyvinyl Alcohol/Polyionic Liquid (PVA-PIL) hybrid membranes were fabricated by vacuum drying method. Poly (1-Vinyl-3-butylimidazolium bromide) (PIL1) and poly (1-Vinyl-3-butylimidazolium bromide)-poly (butyl acrylate) (PIL2) were selected and tested as the main components of bacteriostatic agents. The antibacterial properties of the PVA-PIL hybrid membranes against bacteria E. coli and S. aureus were tested by the disc method. Meanwhile, the cytotoxicities of hybrid membranes were evaluated against mouse fibroblast (L929) by fluorescent staining experiment. M2 showed excellent antibacterial properties which could not be found on M3. Furthermore, all PVA-PIL membranes exhibited favorable cytocompatibilities. These properties make M2 a possible candidate for wound dressing.
Technical Appraisal Method of Circuit Breaker Material Evidence in Fire
Authors: Wang Liantie , Li Dandan , Guo Chen 
Published: April 2023

Abstract
Circuit breaker is an important electrical control on and off in the electrical line, which refers to the switch device that can close, load and break the current under normal loop conditions, and can close, load and break the current under abnormal loop conditions in the specified time. Circuit breakers are divided into high voltage circuit breakers and low voltage circuit breakers according to their range of use. Low voltage circuit breakers are common to molded case circuit breakers. Play a protective role in the safety of electrical lines and electrical appliances. When a fire occurs, the action of the circuit breaker plays a vital role in the occurrence and development of the fire. Therefore, the circuit breaker is an important material evidence in the investigation of the cause of electrical fire, and it will play an irreplaceable role in the investigation of the cause. In particular, the plastic case circuit breaker is the most commonly used type in life. The plastic case circuit breaker extracted from the fire scene, according to the appearance characteristics or internal structure characteristics, identify its working state in a period of time before and after the fire, and can judge the relationship between the physical evidence and the cause of fire.
Application of Secondary Short Circuit Fuse Mark in Fire Cause Investigation
Authors: Wang Liantie , Mo Yunfei , Meng Qingshan 
Published: April 2023

Abstract
Metallographic analysis technology holds an important place in the fire material evidence identification, especially in the cause of the electrical fire scene investigation process, indispensable metallographic method, through the analysis of the microstructure of metal material evidence, can judge the melting properties of material evidence, namely the formation of physical evidence logic relationship with the occurrence of fire in time, Thus provide the most direct evidence for the fire scene investigation. There are many kinds of fusion marks extracted from fire scene, common ones are fire fusion mark, primary short circuit fusion mark, secondary short circuit fusion mark, etc. [1]. The relationship between the formation of secondary short circuit fuse mark and the electrical circuit is complicated, and its characteristics are different from those of fire fuse mark and primary short circuit fuse mark.
Experimental Study on the Chemical Resistance of Polyaroxydiazole Fiber
Authors: Niu Huirong , Mao Ning 
Published: April 2023

Abstract
Polyarylene oxadiazole fiber (POD) is a kind of fiber commonly used in high temperature resistant filter materials. It is used in industrial filter screens. In order to study its chemical corrosion resistance, this paper uses different mass fractions of sulfuric acid, nitric acid, sodium hydroxide and ammonia solution is used to treat the POD fibers for different times. By characterizing the mechanical properties of the treated fiber, it intuitively reflects the acid and alkali resistance of the POD fibers. The results show that the strength retention rate of POD fibers is 38% when treated with 50% sulfuric acid for 72 hours; the strength retention rate is 36% when treated with 60% nitric acid for 72 hours; the strength retention rate is 77% when treated with 30% sodium hydroxide for 72 hours and after 72 hours of treatment with 20% ammonia water, its strength retention rate is 79%; the alkali resistance of POD fibers is better than the acid resistance.
Study on Microstructure and Properties of Thermal Barrier Coating for Gas Turbine
Authors: Sui Yongfeng , Liao Xiaolin , Liu Zhonghua , Tu Yao , Yu Peijiong , Chu Peng 
Published: April 2023

Abstract
Thermal barrier coating (TBC), which can protect the metallic components from hot gas, is one of the core technologies to achieve the development goal of higher thermal efficiency and lower emission for gas turbine. A double-coat TBC was prepared on the Mar M247 substrate of turbine blade for gas turbine which consisted of a CoNiCrAlY bond coat(BC) was prepared by high velocity oxygen fuel(HVOF) and a ZrO2-8Y2O3(8YSZ) top coat(TC) was prepared by atmospheric plasma spraying (APS).The microstructure of the TBC was analyzed by optical microscope(OM) and scanning electron microscope(SEM), and the thermal insulation and thermal shock resistance of the TBC were investigated. The results show that the homogeneous and fine microstructure in TBC is obtained,the interfacial bonding between the top coat and the bond coat, between the bond coat and the substrate is well. The thermal insulation temperature can reach 156°C,under the condition of test temperature of 1150°C and cooling air flow of 4 m3/h. And the thermal shock resistance is greater than 100 cycles at the test condition of 1050 °C.
Synthesis and Electrochemical Properties of SnO2/C Nanocomposites
Authors: Li Lin , Zheng Wei , Cheng Jinsong , Zhao Rongfei 
Published: April 2023

Abstract
The SnO2/C nanocomposites were prepared through a facile approach combining sol-gel synthesis with thermal reduction. The XRD, TG, (HR-) TEM, and electrochemical performance tests were used to study the relevance between the physical character and electrochemical properties of the electrode material. As the anode material, the results show that the SnO2/C nanocomposites delivered excellent lithium storage properties (539 mAh g–1 of 100th), compared with the bare SnO2 nanoparticles. It is demonstrated that the preparation of SnO2/C nanocomposites structured can effectively alleviate the particle pulverization caused by volume expansion, effectively shorten the diffusion distance of lithium ions, prevents the aggregation of SnO2 with the carbon layer, and improve the cycle stability of the electrode. Meanwhile, the incorporation of the SnO2 particles suppressed the stack of carbon layer.
SnS-RGO Hybrid Nanosheets as High Performance Flexible Photodetectors and Visible-Light Photocatalysts
Authors: Li Ang , Zhuo Renfu , Tang Xiaoli , Wang Jun , Yan De , Men Xuehu , Geng Baisong , Wu Zhiguo , Yan Pengxun , Zhang Guangàn 
Published: April 2023

Abstract
A straightforward solvothermal technique was used to create tin monosulfide (SnS) nanosheets that were reduced graphene oxide (RGO) bonded. On the folded RGO surface, it was discovered that the 2D SnS nanosheets had several layers that were evenly distributed. When exposed to visible light, a flexible photodetector made of PET substrate exhibits a 1.4 mA W−1 optical response, 3.5 × 107 Jones detection rate, and quick rise and fall times. (τ
rise = τ
decay = 0.08 s). When exposed to visible light, the methylene blue’s (MB) photocatalytic breakdown was used to test the photocatalytic performance of the synthesized SnS-RGO hybrid nanosheets. The fact that almost all of the MB dissolved in under one hour suggested that SnS-RGO nanosheets make promising high-performance photocatalysts.
Strengthening and Toughening Technology of Epoxy Resin
Authors: Wei Huazhen , Wang Danyong , Xing Wenfang 
Published: April 2023

Abstract
Epoxy resin materials have excellent processability, adhesion, corrosion resistance, electrical insulation, mechanical properties, heat resistance and other properties. At present, they are widely used in weapons, aviation, aerospace, high-temperature adhesives and many other fields. However, epoxy resin has the defects of brittleness, low flexibility, weak impact resistance, poor peel resistance and low heat resistance in the process of use, especially in high-end fields such as weapons, the upper limit temperature is not high, The problems of high brittleness and easy premature cracking exposed in low temperature environment limit the deeper use of epoxy resin materials. This paper analyzes and discusses the advantages and disadvantages of some mainstream epoxy resin modification technologies, and prospects the next research trend, so as to provide reference for further research on strengthening and toughening epoxy resin in the future.
Finite Element Structural Simulation of Connecting Rod
Authors: Jia Huamin , Li Shuhu 
Published: April 2023

Abstract
As an important bearing structure of maglev train, the connecting rod has high requirements for material performance. In this paper, according to the structural bearing capacity of the connecting rod, the finite element methodwas used to calculate and analyze the structure of the composite connecting rod and the aluminum alloy connecting rod under two working conditions, so as to determine the advantages of the composite connecting rod in mechanical properties and provide theoretical support for the design of the composite connecting rod.