最新刊期
      卷 28 ， 期 4 ， 2015
      • Zheng-yu GONG,Guo-ping ZHANG,Rong SUN,Ching-ping WONG
        Vol. 28, Issue 4, Pages: 1-11(2015) DOI: 10.14028/j.cnki.1003-3726.2015.04.001
        摘要：Self-healing materials,which can healing itself after damage, have achieved rapid development. Polymer materials with self-healing ability include extrinsic self-healing and intrinsic self-healing. There are growing concerns on intrinsic self-healing polymer materials since they have potential healing ability by itself and can achieve multiple repairing. Without or little external energy, intrinsic self-healing based on non-covalent interaction can be accomplished efficiently within few minutes. Those self-healing materials have a great significance for realizing energy conservation and sustainable development of society. Using different types of non-covalent bonds as clues,this review depicts the progress and application of intrinsic self-healing polymer materials. Furthermore, the developing direction of this field was also prospected in this review.  
        关键词：Non-covalent bond;Intrinsic;Self-healing;Smart materials   
        5
        |
        12
        |
        6
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 30019106 false
        发布时间：2022-09-18
      • Zhen-lin CHEN,Li-juan XIE
        Vol. 28, Issue 4, Pages: 12-17(2015) DOI: 10.14028/j.cnki.1003-3726.2015.04.002
        摘要：Dendriner polyamide amine (PAMAM) is a new three-dimensional polymer material which possesses properties of controlled particle size,monodispersion,non-immunogenicity,low cytotoxicity and biodegradation. As drug carriers,it has some advantages of small size, high permeability and retention (EPR) effect,good stability, high drug loading and so on, which can actively target specific tissues,cells or some certain targets through modification of targeting molecules, to improve therapeutic effect and decrease toxicity. The advantages and the latest research progress of active targeting PAMAM drug delivery system (ATPDDS) as drug active delivery platform is reviewed.  
        关键词：PAMAM;Targeting molecule;Targeting drug delivery system   
        3
        |
        11
        |
        1
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 30019098 false
        发布时间：2022-09-18
      • Xin-xiu SHI,Chong-kai YUAN,Chuan-ping WANG,Meng-zhong CUI
        Vol. 28, Issue 4, Pages: 18-37(2015) DOI: 10.14028/j.cnki.1003-3726.2015.04.003
        摘要：The thermosetting epoxy resins have excellent physical and chemical properties, and they have outstanding adhesive strength to the surface of both metallic and non-metallic materials. They are widely applied in casting, impregnation, lamination, adhesive and coating production, and other uses. However, epoxy resins have certain disadvantages, including brittleness,low resistance to impact and poor heat resistance,which limit their application. Many researchers have made fruitful studies on modification of epoxy resin. For example,organosilicon compound modified epoxy resin has unique advantages in improving its thermal oxidative stability, toughness and ablation resistance. In recent years, new results have been achieved in modifying epoxy resins using functional organic silicone compounds and polymers as modifiers. These researches include copolymerization modification,curing agent crosslinking modification,blending/cocrosslinking with resin epoxy modification, compatibilization modification, interpenetrating polymer network (IPN) modification, flame retardants introduced modification and nano/micron composite modification. This paper is aimed to draw a conclusion of the investigative progress of the research in organosilicon modified epoxy resins listed above. In addition,we predict the potential application and possible future development directions of silicone modified epoxy materials.  
        关键词：Organosilicon;Epoxy resin;Chemical modification;Toughness;Thermo-oxidative stability   
        2
        |
        8
        |
        7
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 30019099 false
        发布时间：2022-09-18
      • Yue ZHU,Xin-yu XU,Li ZHOU
        Vol. 28, Issue 4, Pages: 38-44(2015) DOI: 10.14028/j.cnki.1003-3726.2015.04.004
        摘要：Nanomaterials and liquid crystal materials are two excellent functional materials. Combination of nanomaterials and liquid crystal materials is of great interest due to their excellent properties. In addition to their own characterizations,the composite materials also show some new properties due to the interaction between nanomaterials and liquid crystal materials. Nanomaterials can be divided into metal nanoparticles,metal oxide nanoparticles,carbon nanotubes et al. This article describes the recent and significant development in different nanomaterials doping liquid crystal composite materials. The dispersion of nanoparticles in liquid crystals was examined. The effects of nanomaterials on the phase transition temperature of liquid crystal, photoelectric and conductive properties of the composites were investigated.  
        关键词：Nano materials;Liquid crystal;Composite materials;Photoelectric performance;Electrical conductivity   
        2
        |
        9
        |
        1
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 30019102 false
        发布时间：2022-09-18
      • Jie GUO,Yi XU,Zhi-jiang CAI
        Vol. 28, Issue 4, Pages: 45-51(2015) DOI: 10.14028/j.cnki.1003-3726.2015.04.005
        摘要：Preparation of polymer/TiO2 composite nanofibers using nano-titanium dioxide as photocatalyst has wide application in the fields of wastewater treatment, photovoltaic cells, sensors and lithium-ion batteries. This paper introduces the development of TiO2 nanofibers preparation by electrospinning in recent years at home and abroad,focusing on the preparation of TiO2 nanofibers with different types and the modification of TiO2 nanofibers by the methods of noble metals deposited,ion doped, semiconductor composite and surface sensitization. The potential applications and prospect of TiO2 nanofibers have also been described.  
        关键词：Electrospinning;Titanium dioxide;Nanofibers;Photocatalytic   
        2
        |
        10
        |
        2
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 30019103 false
        发布时间：2022-09-18
      • Zhen ZHU,Xin CHEN,Zhou-wen HE,Liang-hua XU,Chang-qing LI
        Vol. 28, Issue 4, Pages: 52-58(2015) DOI: 10.14028/j.cnki.1003-3726.2015.04.006
        摘要：Preparing PAN films by expelling the solvent in polymer solution of different concentration with double diffusion and gathering PAN nascent fibers through various jet rate. The effect of entanglements between molecules on crystallization behavior of PAN molecules in solidification process was studied by rheometer, X-ray diffraction etc. The results show that the differences of polymer solution concentration affect the intensity of molecular chain in polymer solution which affects the entanglements between molecules and crystallization behavior. The stronger entanglement is,the lower crystallization is. Shearing could change the conformation of molecular chain,which promotes to weaken the entanglements so that it is benefit to elevate the activity of polymer chain and the crystallization of PAN nascent fiber.  
        关键词：Molecular entanglements;Crystallinity;Polarity;Molecular mass   
        2
        |
        9
        |
        1
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 30019193 false
        发布时间：2022-09-18
      • Xue JIANG,Xiao-qing WANG,Huai-jun CHEN,Ji-dong HE
        Vol. 28, Issue 4, Pages: 59-66(2015) DOI: 10.14028/j.cnki.1003-3726.2015.04.007
        摘要：The maleoyl chitosan (MCS) was prepared at room temperature by using sodium carbonate as catalyst. The effect of reactant feed ratio on the degree of substitution and water-solubility of acylated product was studied. FT-IR show that the maleic anhydride is successfully grafted onto chitosan molecule, X-ray diffractometry(XRD) results indicate that maleic anhydride acylating destructed the hydrogen bonds within and between molecules of chitosan, which greatly improved water-solubility. The particle size and zeta potential at different pH values were determined by using Nano-ZS90 Malvern Instruments. The isoelectric point is pH = 3. 01. Three different maleoyl Chitosan nanoparticles in acetic acid, formic acid,lactic acid solution were prepared by self-assembly approach for the first time,which were characterized by scanning electron microscopy(SEM). Dynamic light scattering(DLS) tests show that three kinds of nanoparticles swelled from tens of nanometers to hundreds of nanometers when the pH value increased, which displays the pH-responsive property.  
        关键词：Chitosan;Self-assembly;Nanoparticles;pH- Responsive;Drug delivery   
        2
        |
        9
        |
        2
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 30019194 false
        发布时间：2022-09-18
      • Zhong-ping CHEN,Chang-chun SONG,Xu-chun WANG,Jun-hua CHEN,Jia-hao GUO,Jun-ming CHEN,Ting ZHANG
        Vol. 28, Issue 4, Pages: 67-73(2015) DOI: 10.14028/j.cnki.1003-3726.2015.04.008
        摘要：Polyaniline ( PAn) was electropolymerized on Ti-based metal electrode and Platinum was loaded on Polyaniline, Pt/PAn/Ti was prepared by cyclic voltammetry (CV) and was characterized by SEM and CV. Influence of platinum quantity and function of PAn were investigated by reseaching electrocatalytic oxidatiom of formaldehyde on Pt/ PAn/Ti electrode. The result showed that electrocatalytic oxidation effect of formaldehyde has relationship with platinum quantity. Platinum microparticles were dispersed better and they had bigger effective area, compared with the Pt/Ti electrode deposited the same platinum quantity, the peak current of formaldehyde in the positive scanning increase 2. 3 times and oxidation potential was negative by about 40mV on Pt/PAn/Ti electrode. The peak current of formaldehyde in the negative scanning increase about 5 times and oxidation potential was negative by about 30mV. At the same time, the result show too that the anti poisoning ability of Pt/PAn/Ti electrode was increased because of PAn.  
        关键词：Ti electrode;Polyaniline;Cyclic voltammetry(CV);Electrocatalytic oxidation;Formaldehyde   
        2
        |
        10
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 30019198 false
        发布时间：2022-09-18
      • Na QIANG,Hao LIANG,Fang XIE,Hai-xia TAO,Xian-feng LI,Li-fang LIU
        Vol. 28, Issue 4, Pages: 74-80(2015) DOI: 10.14028/j.cnki.1003-3726.2015.04.009
        摘要：A novel polyethylenimine(PEI)-based gene carrier was used for carrying a plasmid encoding small interfering RNA(siRNA). A series of semicrystalline copolymers, especially with functional group carboxyl poly(L-lactide-co-β-malic acid) were synthesized. Random polymers P(LA-co-BMD) were first synthesized through ring-opening copolymerization of L-LA and 3(S)-[(Benzyloxycarbony) methyl]-1, 4-dioxane-2, 5-dione(BMD) in the presence of dodecanol as initiator and stannous octoate(Sn(Oct)2 ) as catalyst. The structure of the copolymers was characterized by Nuclear Magnetic Resonance (1H NMR) , Gel Permeation Chromatography ( GPC), and Differential Scanning Calorimetry ( DSC). The density of carboxyl groups were increased with the functional monomer. The PEI was coupling with the copolymer by amino groups. The modification of polymeric vectors has shown higher transfection efficiency and lower cytotoxicity. The micelles showed a significant reduction in surface zeta-potential ( — 9〜-35mV) and a much smaller particle size(50〜500nm).  
        关键词：Polyethylenimine (PEI);Small interfering RNA(siRNA);Functional group;Zeta-potential;Particle size   
        4
        |
        11
        |
        1
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 30019202 false
        发布时间：2022-09-18
      • Cai-hua NI,Ming-qing CHEN,Xiao-ya LIU,Gang SHI
        Vol. 28, Issue 4, Pages: 81-85(2015) DOI: 10.14028/j.cnki.1003-3726.2015.04.010
        摘要：Several typical living free-radical polymerization (LFRP) systems were studied, the electronic effects of active species and dormant species on the equilibrium systems were analyzed, and the essential reasons for the occurrence and control of LFRP were investigated. It was concluded that active species and dormant species coexist in equilibrium system; The electronic effect of the materials was significant for the equilibrium systems ; Stable equilibrium systems and the rapid reversible changes between active species and dormant species resulted in the living free-radical polymerization. Recognizing this principle was helpful for students to understand the nature of living free-radical polymerization, and to use the knowledge smartly.  
        关键词：Living radical polymerization;Electronic effects;Equilibrium system;Active species;Dormant species   
        2
        |
        10
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 30019201 false
        发布时间：2022-09-18
      • Xue-feng LI,Gao-wen ZHANG
        Vol. 28, Issue 4, Pages: 86-89(2015) DOI: 10.14028/j.cnki.1003-3726.2015.04.011
        摘要：This paper first analyzes the disadvantages in training of innovative and entrepreneurial talents in colleges and universities of China,based on which the strategies are then discussed for training modes of innovative and entrepreneurial talents for the specialty of Polymeric Materials. Particularly, executive solutions are proposed to strengthen the practical training and promote the construction of engineering education. And then the talent training mode in the case study was carried out the application in the specialty of Polymeric Materials. Finally, the role of engineering education is investigated on training of interdisciplinary talents in colleges and universities.  
        关键词：Polymer materials;Innovation and entrepreneurship;Interdisciplinary talent   
        2
        |
        10
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 30019225 false
        发布时间：2022-09-18
      • Zhi HAO,Zhu LUO,Cai-juan HUANG
        Vol. 28, Issue 4, Pages: 90-93(2015) DOI: 10.14028/j.cnki.1003-3726.2015.04.012
        摘要：Polymer modification is one of the most important specialized courses in the curriculum for the graduate students majoring in polymer materials. The course has the characteristics of comprehension, practicality and frontier. Based on the specialty of the course content and requirement of higher education reform, the current teaching condition and existing problems are analyzed. From the teaching system, teaching content, teaching methods, testing ways and other aspects,some proposals of teaching reform for polymer modification are proposed. The purpose is to get better teaching effect in limited period. The practice shows that the teaching exploration can stimulate students learning interests and improve student's comprehensive ability.  
        关键词：Polymer modification;Teaching reformation;Proposals   
        4
        |
        14
        |
        1
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 30019228 false
        发布时间：2022-09-18
      0