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东华大学学报（英文版）
东华大学
东华大学学报（英文版）

东华大学

严濒景

双月刊

1672-5220

xuebao@dhu.edu.cn

021-62373643

200051

上海市延安西路1882号《东华大学学报》编辑部

东华大学学报（英文版）/Journal Journal of Donghua University(English Edition)EI
查看更多>>本刊以纺织、合成纤维、服装等学科为特色，兼顾相关学科的学术刊物，主要刊载本校师生员工的科技论文，同时也刊载校外、海外的科研论文。
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    Preparation and Luminescence Properties of Nylon 6 Composite Nanofibers

    ZHANG ManXI PengWANG YanSHU Dengkun...
    1-9页
    查看更多>>摘要：The luminescent fibers have a good application prospect.The feature of this paper is that efficient luminescent nylon 6 (PA6) composite nanofibers are successfully prepared by electrospinning.The luminescent PA6 composite nanofibers composed of PA6,Eu(BA)3Phen and Tb (BAO) 3Phen (BA =P-methylbenzoic acid,BAO =P-methoxybenzoic acid,and Phen=1,10-phenanthroline).The structure and properties were characterized by scanning electron microscopy (SEM),Fourier transform infrared spectroscopy (FTIR),fluorescence spectroscopy,and thermogravimetriy (TG) analysis.The correspondence between polymer matrix and as-prepared composite nanofibers properties has also been studied in detail.Through using hexafluoroisopropanol (HFIP) as solvent,Eu(BA)3Phen/PA6 and Tb(BAO)3Phen/PA6 composite nanofibers exhibit good luminescence properties.It is noted that only 5％ rare earth luminescent materials are added to Tb(BAO)3Phen/PA6 composite nanofibers,and the luminescence intensity of the asprepared nanofibers reaches half that of the pure rare earth luminescent materials.Furthermore,uniform dispersion of pure rare earth luminescent materials in the as-prepared nanofibers gives the composite nanofibers good mechanical properties and thermal stability.These results provide an important basis for the preparation and wide application of new PA6 luminescent fibers.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 维普
    • 万方数据

    Mechanical Simulation of Hierarchical Micro-Nano Structure of Butterfly Wings

    SHI ShunjieGE DengtengJIN JunhongLI Guang...
    10-16页
    查看更多>>摘要：The ridge-cross rib microstructures of Carystoides escalantei butterfly wing scales have been reproduced by 2D and 3D models via the ANSYS software,and the structural analyses under tensile and bending deformation,as well as the relative failure analyses are performed for those models.It has been found that the curved model in which the ridges acted as triangular prisms while the cross-ribs acted as bend cuboids could simulate the real scale configuration more accurately.Besides,it also shows much more even stress distribution under deformation and better mechanical properties than the rectangular one,in which both ridges and cross-ribs are modeled as regular cuboids.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 维普
    • 万方数据

    Low-Velocity Impact and Compression after Impact (CAI) Behaviors of Carbon-Aramid/Epoxy Hybrid Braided Composite Laminates

    CAO HongxueSUN YingTANG MengyunDING Xu...
    17-27页
    查看更多>>摘要：Low-velocity impact and in-plane axial compression after impact (CAI) behaviors of carbon-aramid/epoxy hybrid braided composite laminates were investigated experimentally.The following three different types of carbon-aramid/epoxy hybrid braided composite laminates were produced and tested:(a) inter-hybrid laminates,(b) sandwich-like inter-hybrid laminates,and (c) unsymmetric-hybrid laminates.At the same time,carbon/epoxy braided composite laminates were used for comparisons.Impact properties and impact resistance were studied.Internal damages and damage mechanisms of laminates were detected by ultrasonic C-scan and B-scan methods.The results show that the ductility index (DI)values of three kinds of hybrid laminates aforementioned are 37％,4％ and 120％ higher than those of carbon/epoxy laminates,respectively.The peak load of inter-hybrid laminates is higher than that of sandwich-like inter-hybrid laminates and unsymmetric-hybrid laminates.The average damage area and dent depths of inter-hybrid laminates are 64％ and 69％ smaller than those of carbon/epoxy laminates.Those results show that carbon-aramid/epoxy hybrid braided composite laminates could significantly improve the impact properties and toughness of non-hybrid braided composite laminates.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 万方数据

    Preparation of Photochromic Waterborne Polyurethane Films: Effect of Spiropyran Concentration on Photochromic Properties

    BAO LihongWANG Shixian
    28-34页
    查看更多>>摘要：Incorporation of photochromic compounds to the polymer through chemical bonding will result in an enhancement of photoactivity and stabilization of optical properties.Here,spiropyran (SP) was introduced into polyurethane (PU) through semi-continuous emulsion copolymerization to get waterborne polyurethane dispersion (SPU).Studies on photochromic properties by UV-vis technique demonstrated the absorption intensity increased with the increasing of SP concentration and the colorless film turned to purple under UV irradiation.The kinetics for ring-opening and ring-closing reaction against SP were both first order,but the rate constants decreased with the increasing of SP concentration.The prepared SPU films showed reasonable photostability and photoreversibility according to the convenient test methods under UV-vis irradiation.Temperature dependence studies demonstrated that the photobleaching rate increased at higher temperatures with the same SP concentration.The chemical combination between SP and isocyanate (NCO) end group of polyurethane was confirmed through swelling experiments.Morphology studies were conducted by scanning electron microscope (SEM) micrographs and showed good compatibility between SP and PU.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 万方数据

    Preparation, Characterization and Antioxidant Activity of Inclusion Complex of Bakuchiol with Hydroxypropyl-β-cyclodextrin

    DENG YunxiaLIU MinyanWANG LuBIAN Yonggang...
    35-42页
    查看更多>>摘要：Bakuchiol isolated from Psoralea corylifolia is a naturally occurring prenylated phenolic monoterpene with a variety of bioactivities.The aim of this study was to improve the water solubility and thermal stability of bakuchiol through complexing it with hydroxypropyl-β-cyclodextrin (HP-β-CD).The bakuchiol/HP-β-CD inclusion complex's behavior and characterization were investigated by ultraviolet-visible (UV-vis) spectroscopy,Fourier transform infrared spectroscopy (FT-IR),thermogravimetric analysis (TGA),X-ray diffraction (XRD),1H nuclear magnetic resonance (NMR),and two-dimensional (2D) NMR.The obtained results indicated the formation of 1 ∶ 1 inclusion complex for bakuchiol with HP-β-CD.Water solubility of bakuchiol was significantly improved by complexation with HP-β-CD as demonstrated by phase solubility studies.The encapsulation of bakuchiol was confirmed by UV-vis,FT-IR,and XRD.The thermal stability was effectively enhanced by TGA and derivative thermogravimetry (DTG) analysis.In vitro antioxidant activity showed that bakuchiol/HP-β-CD inclusion complex had a little higher antioxidant ability than free bakuchiol.Moreover,we got the possible inclusion mode for the bakuchiol/HP-β-CD inclusion complex through NMR analysis.These results suggest that the inclusion complex can be a potentially useful approach in the design of novel formulations of bakuchiol for medical applications.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 万方数据

    Modal Analysis and Multi-objective Optimization of Pressurizing Pipeline

    WANG YepingLI Hang
    43-49页
    查看更多>>摘要：The pressurizing pipeline of hot press resonates under the excitation load,which poses a serious hidden danger to the safety of the equipment and the operator.In order to increase the natural frequency of the pressurizing pipeline,modal analysis of the pressurizing pipeline is carried out to study the mechanism of pipeline vibration and common vibration reduction measures.A method of increasing the natural frequency of the pressurizing pipeline was analyzed.The influence of pipeline clamp assembly stiffness,pipeline damp number and pipeline clamp installation position on the mode of the pressurizing pipeline is studied.Sensitivity analysis is carried out to study the influence of the various parameters on the mode of the pressurizing pipeline.Genetic algorithm based on Pareto optimality is introduced for multi-objective optimization of pressurizing pipeline.The optimization results show that the natural frequency of the pressurizing pipeline increases by 2.4％ and the displacement response is reduced by 17.7％.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 维普
    • 万方数据

    Basic Physical Properties and Degradability of Tungsten Wire Fibers

    ZHU YejiaMA YanxueGUAN GuopingMENG Fenye...
    50-54页
    查看更多>>摘要：In order to explore the feasibility of tungsten filament as biomedical metal material,this article conducted a series of performance tests on two different thicknesses of black tungsten filament and two different thicknesses of white tungsten filament.It mainly tested the basic physical properties of the tungsten filament including the longitudinal cross-section of the fiber,the fiber diameter,the mechanical properties of the fiber and the biodegradability,and analyzed the results.The results showed that the breaking force of tungsten filament was about 3000MPa.And whether it was black tungsten filament or white tungsten filament,the larger the diameter,the greater the breaking force,and the breaking strength of the tungsten filament was much larger than the breaking strength of the steel wire.The larger the diameter of the tungsten filament,the slower the degradation rate.During the two months,the mass loss rate of the thick black tungsten filament was 59.40％,thin black tungsten filament was 83.88％,thick white tungsten filament was 47.39％,thin white tungsten filament was 72.29％,the degradation rate of thick tungsten wire was nearly half of the thin,and degradation mainly occured in the first months.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 维普
    • 万方数据

    Application of Differential Invariant Method for Solving the Electromagnetic Fields

    FU JingliXIANG ChunCAO ShanGUO Yongxin...
    55-59页
    查看更多>>摘要：We study the first integral and the solution of electromagnetic field by Lie symmetry technique and the differential invariant method.The definition and properties of differential invariants are introduced and the infinitesimal generators of Lie symmetries and the differential invariants of electromagnetic field are obtained.The first integral and the solution of electromagnetic field are given by the Lie symmetry technique and the differential invariants method.A typical example is presented to illustrate the application of our theoretical results.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 维普
    • 万方数据

    Effect of Woven Structure and Ratios of Warp and Weft Density on Water Permeability and Thickness of Woven Polyimide Vascular Grafts

    CHEN XiaoyingGUAN GuopingMA YanxueMENG Fenye...
    60-65页
    查看更多>>摘要：Textile vascular grafts are often used to treat the cardiovascular diseases.Scholars continue to search for new materials for the development of vascular grafts with excellent properties,polyimide (PI) fiber is a material suitable for making vascular grafts with high strength,radiation resistance and stable property,as wall as non-cytotoxic and satisfying blood compatibility.This study investigated the tensile strength and hydrolytic degradation properties of PI,polyester (PET) and nylon (PA).The results suggested that the PI is suitable for preparing vascular grafts.And influences of different weaves and ratios of warp and weft density on the water permeability,thickness and porosity of PI vascular grafts were analyzed.Vascular grafts with six weaves and two ratios of warp and weft density were designed and prepared.The surface morphology,permeability and thickness were characterized to optimize the structure of the vascular grafts.The results showed that the wall thickness of all the samples is less than 100 μm except for the sample with the ratio 2 ∶ 3 and 1/3 twill pattern.Permeability is mainly determined by the weave and the ratio of warp and weft density.The samples in plain weave have the lowest water permeability compared with other samples.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 维普
    • 万方数据

    Experimental Analysis of Influencing Factors on Heat Exchange Efficiency of Cast-in Place Energy Piles

    CHEN ZhiXIAO YuXIAO HenglinQUE Mengke...
    66-73页
    查看更多>>摘要：The energy pile is a kind of building energy-saving technology using shallow geothermal energy,and its heat exchange performance is an important factor affecting its development.In this study,heat exchange tests were carried out on three full-size cast-in place energy piles,and the influence of various factors on the heat exchange amount and the heat exchange rate was analyzed.The following conclusions are drawn:(1) the heat exchange rate of the cast-in place energy pile is greatly affected by the inlet water temperature;(2) increasing the pile length can increase the heat exchange amount,but has little effect on improving the heat exchange rate;(3) the increase in the heat exchange amount by heat exchange pipes in series is not significant,and therefore the parallel-type heat exchange pipes should be considered in practical engineering;(4) the appropriate circulating water flow velocity gives the best heat exchange efficiency.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 维普
    • 万方数据