最新刊期
卷 29 ， 期 6 ， 2016
- 摘要：Biomaterials are used in human tissues and organs to diagnosis diseases, repair and inprove body functions as high-tech materials. Extensive attention and comprehensive research have been done in the field of tissue engineering, regenerative medicine and drug delivery. However, the general existence of nonspecific protein absorption usually leads to the pollutions of the biomaterials and sometimes even life-threatening consequences. Therefore, the research of non-specific protein resistant materials has become a hot topic in the field of biomedical materials. Firstly, this paper intrdouces the process of protein absorption and the mechanism of anti-protein materials resistant materials. Then it foucuses on the public concerning anti-protein materials and their applications in the biomedical field. Finally, it shows a developing trend of biomaterials.关键词：Protein resistant materials;Adsorption mechanisms;Biomedical applications;Review
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发布时间：2022-09-12 - 摘要：The light-emitting diode lighting (LED) encapsulant is an indispensable part of the LED devices, and it protects the LED chip from the damage of the environmental temperature,humidity,radiation, mechanical forces and so on. So far, the silicone based LED encapsulants considered as an ideal kind of material for high-power LED encapsulation. They show excellent thermal stability, UV radiation stability, durable thermal cycling performance, as well as high transparency, good hydrophobicity. However, the refractive index difference between the silicone encapsulant and the chip material usually cause noticeable loss of the light output. How to enhance the silicone encapsulant' s refractive index in order to improve the light output efficiency of LED has become one of the hot points in this area. This review reports the research progress of the silicone based LED encapsulants with high refractive index in the near decade. There are mainly three ways to enhance the refractive index of the encapsulants according to the literature, that includes introducing hetero- atoms into the molecular chain, introducing phenyl groups attached to silicon and introducing inorganic nano-particles to the material. The progress in this field is also illustrated by analysis the changes of the amount of the publication and patent disclosed in the recent years.关键词：Silicone resin;LED encapsulant;Refractive index;Organosilane
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发布时间：2022-09-12 - 摘要：As one kind of important stimuli-responsive materials, the shape memory polymers (SMP) have developed dramatically in the last decade. Many new branches and directions, mechanism explanationand transition structures emerged as well as its applications. SMP has exhibited excellent performance in the fields like astronomy, biology, pharmacy, sensors and actuators, The researches on SMP have been much appreciated, making it one of the most active research fields. This review summarized the recent researches on shape memory polymers made by domestic and foreign scholars. It illustrated the memorizing pattern, classification and the functions of the shape memory polymers. Besides, it offered a future prospect and researching directions so as to provide a reference for the research on it.关键词：Research progress;Shape memory;Polymer
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发布时间：2022-09-12 - 摘要：In recent years, organic/polymer solar cells have drawn extensively attention. Their energy conversion efficiency needs to be further improved to meet commercial requirement of solar cells. This paper reviews the research progress of new two-dimensional material graphene and its derivatives used as acceptor materials,electrode material, interface modified material in the organic/polymer solar cells. Synthetic methods and application of graphene derivatives in organic solar cells were also discussed and analyzed. At last, further modification of graphene and its derivatives was prospected, in order to get better applications in organic solar cell material in future.关键词：Graphene;Organic solar cells;Acceptor material;Electrode material;Charge transport material
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发布时间：2022-09-12 - 摘要：Reactive epoxy groups exists in epoxidized natural rubber (ENR),which provided a great convenience for further modification of ENR based on the ring-opening reaction of epoxy groups. Selective hydrogenation to double bond of ENR can improve the thermal stability. Antiager and flame retardant can be loaded to the molecular chain of ENR by the reaction of epoxy groups with amine compounds and phosphorus compounds so as to achieve the molecule-size dispersed state. Also telechelic NR can be prepared by selective oxidation degradation of epoxy group of ENR, which can be used for precursor of block copolymer of NR. a modification with other polymers can be realized by the reaction based on epoxy groups. In addition, ENR has well compatibility with inorganic filler and other polar polymer in blend due to the presence of epoxy groups.关键词：Natural rubber;Epoxidation;Secondary modification;Epoxidized natural rubber
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发布时间：2022-09-12 - 摘要：Nowadays,Polyaniline has become one of the most widely studied conductive polymer materials. With special electrical and optical properties, Polyaniline after doped by proton acid can be applied to the field of the electronics industry, information engineering, national defense engineering, et al. Doped polyaniline can be formed P and N conducting state. With the doping mechanism, Polyaniline is completely reversible during the course of the doping and dedoping. The electrochemical activity is decided by the doping level that is affected by some factors such as pH value and the potential. Polyaniline has more excellent reversible than the traditional electrode materials of lithium ion batteries in the process of charging and discharging. Therefore, the research on the design of polyaniline regarded as an important hole of electrode materials of lithium ion batteries has been paid more and more attention. In this paper, the preparation methods of the different structure of polyaniline are mentioned in details, which are blended with Electrode materials for lithium ion batteries. And the electrochemical performances of the electrode composites added polyaniline are emphatically introduced. As a result, the electrochemical properties can be obviously improved by blended with polyaniline. Finally, the application prospect of polyaniline is predicted, which is used as the electrode materials for lithium ion batteries.关键词：Polyaniline;Lithium ion batteries;electrode Composites;The electrochemical properties
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发布时间：2022-09-12 - 摘要：The pseudo-graphite crystalline structure of carbon fiber is the origin of its excellent mechanical properties. The formation and evolution of crystalline structure of PAN stabilized fiber during carbonization were investigated by the method of wide angle X-ray diffraction in present. The results indicated that : below 1000℃,the polycyclic aromatic structures, which were generated during stabilization process, were closed together and packed parallel to the fiber axis just like nucleation judged by the phenomenon that the d spacing of (002) miller plane was decreased while the crystallites grow slowly. When the heat treatment temperature is higher than 1000℃,the crystallite sizes were increased obviously, implied the three dimensional growth of the pseudo-graphite crystalline structure. During the graphitization stage when the heat treatment temperature was above 1500℃,the crystallite sizes were increased rapidly due to the rearrangement of the crystalline structure. According to the presented results, the structural design and adjustment could be achieved by controlling both the rate of nucleation and growth for pseudo-graphite crystallites.关键词：Carbon fiber;Crystalline structure;Nucleation and growth
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发布时间：2022-09-12 - 摘要：Monodisperse crosslinked carboxyl-functionalized polystyrene microspheres were prepared by dispersion polymerization and the crosslinker-postaddition method with styrene(St) as monomer, divinylbenzene(DVB) as crosslinker, acrylic acid(AA) as functional monomer, 2 , 2-azobis ( isobutyronitrile) (AIBN) as initiator. The microspheres had been characterized by FT-TR, SEM,LPS and Zeta potential analysis, respectively. The results show that the initiator dosage, stabilizer dosage and crosslinker-adding mode have a significant impact on the mono-dispersibility, diameter of polymer particles. Under the conditions w(St) 15% (based on total reaction system mass),w(DVB) 1 %,w( AA) 1 %,w(AIBN) 2% and w(PVP) 6% (DVB, AA, AIBN, PVP based on St mass), the average diameter of PS-DVB-AA microspheres is 4µm. And it also shows that these microspheres keep good excellent particle sphericity and monodisperse property, and carry anionic charge on the surface.关键词：Dispersion polymerization;Carboxyl;Crosslinking;Polymer microsphere
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发布时间：2022-09-12 - 摘要：Poly(aspartic acid)/3 , 5-diamino benzoic acid graft copolymer(PASP/3 , 5-DMBA) was synthesized by using PSI and 3,5-DMBA as the starting materials, and its scale and corrosion inhibitions were evaluated by static and rotary loss test respectively. The results showed that the introduction of 3,5-DMBA could effectively improve the scale and corrosion performances of PASP. Remarkably the scale inhibition rates against CaSO4 and Ca3 (PO4)2 increased significantly at low dosages. The inhibition efficiencies of PASP/3,5-DMBA against CaCO3 and CaSO4 were close to 100 % when the dosages were 1. 25mg/L and 6mg/L respectively. Scale inhibition efficiency against Ca3 (PO4)2 could reach to 75% when the dosage was 18mg/L. After PASP/3,5-DMBA was added, CaCO3,CaSO4 and Ca3 (PO4 )2 deposits showed flower and cascade patterns with floppy accumulation as observed by scanning electron microscopy (SEM).关键词：Poly(aspartic acid);Graft copolymer;Scale inhibition;Corrosion inhibition
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发布时间：2022-09-12 - 摘要：The PTMC rods were directly synthesized via a bulk ring-opening polymerization reaction of TMC in the presence of Sn(Oct)2 as the catalys. The pH of the media before and after degradation was monitored with a combination microelectrode (InLabMicroTM , Toledo-Mettler) and a digital pH meter (FiveEasyTM , Toledo-Mettler). The potential cytotoxicity of the PTMC rods was evaluated using an MTS assay. For one polymer at each study time point, six specimens were implanted bilaterally into the subcutaneous tissue of the back of one rat. After implantation, the Histology of the polymers was evaluated by H&E. The results showed that PTMC can be degraded without the formation of the acidic degradation products, and all the PTMC rods can thus be considered non-cytotoxic with no adverse effects on cell viability. In addition, the PTMC rods are able to coexist with subcutaneous tissues without causing harm, regardless of their initial molecular weight. Thus, the PTMC rods are considered to have good biocompatible and safe for in vivo implantation.关键词：Poly (trimethylene carbonate);Biocompatibility;Cytotoxicity;pH
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发布时间：2022-09-12 - 摘要：Because of the limited supply, non-renewability, and environmental pollution of fossil energy sources, more and more attention has been focused on research high value-added chemicals and fuel from the degradation of lignin. ligin, usuallly used as fuel, has a complex polymer structure which make it difficult to be used as a chemical raw material. Worse yet, complex polymer structure is also an obstacle of research on lignin depolymerization. So, research on the mechanism of lignin pyrolysis by using lignin model compounds was developed rapidly. The research status of pyrolysis process of lignin model compounds were summarized in present paper. Different pyrolysis process characteristics, advantages, application and related mechanism of the lignin monomers , dimers and multimers were introduced, followed by the prediction of the future development of pyrolysis process of lignin model compounds.关键词：Lignin;Model compound;Cracking
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发布时间：2022-09-12 - 摘要：In the experimental teaching of polymer chemistry, the teaching concept of ' flipped classroom' was introduced with the help of the short teaching video. The ability of active learning for the students was effectively aroused and the interactivity for teaching and learning was greatly increased. Due largely to the introduction of "flipped classroom" , the comprehension to the experiments was greatly deepened resulting in the flexible application of theory of polymer chemistry to explain the experimental phenomena. Just because of the application of short teaching video , the responding problems, such as the shortage of class hour for experimental course, lack of experimental equipment and shortage of laboratories, were effectively relieved. In contrast, the utilization efficiency of experimental equipment and laboratories was greatly increased. Depending on the diversified design for experimental projects, the abilities of the students to analyze and solve problems were greatly increased. Through a series of training and thinking, it is much favorable for students to get better understanding of the responding theory of polymer chemistry. Thus, the experimental course becomes more effective to help the students to deepen the understanding of the knowledge, which was leaned from the theory teaching. Furthermore, the related regulations of the operation are being built, which will be much profitable for the further promote 'flipped classroom' in other experimental courses.关键词：Experimental course of polymer chemistry;Flipped classroom;Short teaching video
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发布时间：2022-09-12 - 摘要：Experimental teaching is the important practical link for cultivating inter-disciplinary innovative talents. "Polymer chemistry experiment" is one of the professional basic course for the students majoring in polymer science and engineering. Based on the existing problems in teaching system of polymer chemistry experiment, the way of teaching reform is discussed in this paper. The teaching staff may carry out multi-level contents of course ( introducing comprehensive, design-typed, interest experiments),as well as use advanced technologies for modern teaching and flexibly adopt interactive teaching mode, for the purpose of inspiriting students' interest in scientific research, fostering their subjective initiative, establishing rigorous scientific approach, improving critical thinking ability and creativity.关键词：Polymer chemistry experiment;Teaching reform;Innovation ability
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发布时间：2022-09-12
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