最新刊期
卷 32 ， 期 9 ， 2019
- 摘要：Benefiting from advantages such as good safety, high energy density and long cycle life, all-solid state lithium battery becomes one of the most promising energy storages. However, as an important component of solid lithium battery, solid-state electrolyte still has many problems like low ionic conductivity at room temperature and poor interface properties, which restrict the commercial progress of solid-state lithium battery. This state-of-the-art review provides current researches of outstanding solid-state electrolytes including the solid-state polymer electrolyte,inorganic oxide based lithium ion conductor and inorganic sulfide based lithium ion conductor, summarizes their characteristics and tries to find a promising way for future solid electrolyte.关键词：Solid-state electrolyte;Lithium battery;Solid-state polymer electrolyte;Inorganic solid electrolyte
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发布时间：2022-09-02 - 摘要：The intrinsic low thermal conductivity of polymer materials cannot meet the heat dissipation requirements of modern electronic devices. Therefore, it is important to improve the thermal conductivity of polymers to achieve high-efficiency heat transfer. Hexagonal boron nitride (h-BN) have many advantages such as excellent electrical breakdown strength, high thermal conductivity, excellent dielectric properties, low hygroscopicity and high temperature oxidation resistance. It is also an ideal filler for the preparation of low dielectric constant, low dielectric loss and high thermal conductivity polymer composites. The recent research progress of preparation of BNNSs,as well as methods of improving the thermal conductivity of polymer composites by using BN are reviewed in this article.关键词：Hexagonal boron nitride(h-BN);Thermal conductivity;Polymer
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发布时间：2022-09-02 - 摘要：Self-healing, defined as the ability of materials to self-repair and recover their mechanical properties when being damaged, is quite significant for materials in extending their service time and improving their usage safety. The ionic pairs in ionomers tend to aggregate due to electrostatic interaction and incompatibility with the main chain, forming dynamic physical crosslinks, thus endowing inonomers with the ability to self-heal without the aid of extrinsic healing agents. Herein,the self-healing progress and mechanisms, currently investigated self-healing ionomers,methods of triggering their self-healing behaviors as well as factors that may influence their self-healing ability are systematically reviewed.关键词：Ionomer;Self-healing;Multiplets;Physical crosslinking
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发布时间：2022-09-02 - 摘要：Transplanted tumor model is a commonly used in vivo tumor model. However, it requires a high concentration of tumor cells. Considerable cells are easier to be collected by using three-dimensional (3D) culture technology than traditional two-dimensional culture technique. In this study, zein porous microcarriers were prepared for expanding tumor cells to construct a reliable tumor model. The experimental results show that the cells have good adhesion ability on the microcarriers, and the porous microcarriers have higher cell density than the nonporous microcarriers prepared from the same material. The microcarriers can apply in the construction of transplanted tumor models.关键词：Zein;Porous microcarriers;Tumor model
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发布时间：2022-09-02 - 摘要：The acylhydrazone compound (named AAD), which is a hydroxyl terminated chain extender in PU,was synthesized using terephthalic dihydrazide and diacetone alcohol. The difunctional polyol (polycaprolactone diol PCL-210)and the trifunctional polyether polyol (TEP-240) which are hydrophilic and widely used in biomedical polyurethane materials, react with MDI-50 to produce isocyanate group-terminated polyurethane prepolyxmer respectively. The two pre-PU prepolymer with —NCO groups are mixed in a certain proportion and cross-linked with AAD to obtain a self-healing polyurethane. The self-repairing property was characterized by the recovery value of the tensile strength and the elongation at break before and after repair. It showed that the tensile strength recovered to 94.6% after 24 hours of repair at room temperature, and the elongation at break recovered to 76.3% of the original sample.关键词：Self-repair;pH sensitivity;Reversible covalent bond;Cross-linked polyurethane;Acylhydrazone bond
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发布时间：2022-09-02 - 摘要：In order to study the influence of micro-filler surface modification on the properties of epoxy compositesand UHV basin insulator, surface nano-modified micro-nano alumina filler with different particle size increase values was prepared by the surface grafting of silane method. Epoxy/alumina composites and UHV basin insulator were prepared by blending different proportions of micro-nano alumina fillers to determine their mechanical properties, electrical properties and thermal properties, and compared with unblend epoxy compositesand UHV basin insulator. The results showed that the thermal and electric properties of epoxy composites and UHV basin insulator remained constant after blending carboxylic acid surface grafted alumina filler. however, mechanical properties increased obviously. the tensile strength of epoxy composites increased by 16.5%,the failure pressure value of UHV basin insulator increased by15% when the alumina mass fraction was 15%. With the increase of alumina particle size increased, the electric strength decreased. Alumina surface grafting has practical significance for improving the mechanical properties of epoxy composites and improving the reliability of UHV basin insulator.关键词：Alumina;Silane method;Epoxy composite;Tensile strength;Basin insulator
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发布时间：2022-09-02 - 摘要：The BiVO4/SBA-15 catalyst was prepared by post-hydrothermal method. The catalysts were characterized by XRD,N2 adsorption-desorption and UV-vis. The photocatalytic oxidation simulated diesel desulfurization experiments of simulated diesel are carried out by using 400W metal halide lamp. The effects of reaction conditions on desulfurization were investigated in homemade desulfurization reactor. The results indicated that the BiVO4/SBA-15 catalyst maintains hexagonal mesoporous structure of SBA-15 molecular sieve, and it has good catalytic activity in the desulfurization reaction. The desulfurization rate of simulated diesel can reach 95.58% when the amount of catalyst is 15g/L,n(O)/n(S)=2.0,the reaction temperature is 60℃,the reaction time is 4h,and ratio of extractant to simulated oil is 1 : 1.关键词：BiVO4/SBA-15;Photocatalytic;Oxidative;Desulfurization;Performance
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发布时间：2022-09-02 - 摘要：Polyvinyl alcohol/Chondroitin sulfate fiber scaffolds were prepared by electrospinning with polyvinyl alcohol and chondroitin sulfate as raw materials,and the optimum preparation scheme of composite porous scaffolds was obtained by orthogonal experiment. The morphology and structure of the fiber scaffolds were characterized by SEM and FTIR, and tested the cytotoxicity and degradation proformance of the material. The results shows that when the volume ratio of polyvinyl alcohol to CS solution is 3 : 1,the spinning voltage is 16 kV,and the injection rate is 0.2mm/min, the spinning effect is the best. The cytotoxicity of the material is 0 or 1,that's to say,the material is no cytotoxicity, the degradation rate is about 75% at 60 days of degradation,so the fiber scaffolds has a good application prospect in cartilage repair.关键词：Cartilage scaffolds;Electrospinning;Polyvinyl alcohol;Chondroitin sulfate
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发布时间：2022-09-02 - 摘要：According to the features of the polymer chemistry course, the teaching practices of contrast teaching method applied to polymer chemistry are summarized. The contrast method in polymerization principles,basic concepts and polymers are discussed, and the aim is to draw inferences about other cases and take advantage of this method in the course of polymer chemistry. The practices show that,the contrast method has obvious improvement in teaching effects of polymer chemistry course and is worth popularizing.关键词：Contrast teaching;Polymer chemistry;Teaching effect
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发布时间：2022-09-02 - 摘要：Polymer science is a subject with strong applicability. Polymer science experiments play an important role in this subject. A series of reforms have been carried out in the polymer chemistry experiment course by rearranging the experiment items, innovating on the experiment contents constantly to improve the interesting and practicability of them, emphasizing on the ideas of green chemistry experiment and environmental protection. The interactive promotion between experimental teaching and theoretical teaching has been effectively enhanced,the enthusiasm of students has been obviously inspired and the chemistry environmental protection consciousness of the students has been increased. These are important for improving the comprehensive practical ability of the students and cultivating the high quality applied talents to meet the requirements of the society.关键词：Polymer chemistry experiment;Teaching reform;Applied talent
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发布时间：2022-09-02 - 摘要：In colleges and universities, encouraging undergraduate students to participate in scientific research projects is an effective way to promote the organic combination of school teaching and student scientific research ability training. Moreover, it is of great significance for cultivating innovative talents and improving the quality of talent training. This thesis aims at lacking innovation existed in students majoring in engineering,and combining with the practice of students participating in science and technology competitions in recent years. Furthermore, this paper analyzes the need of science and technology competition activities which improve students' ability of innovation and practice, proposes some effective measures for the innovation spirit and innovation ability training mode of undergraduates majoring in materials based on science and technology competition with interest-oriented.关键词：Talents cultivating;Science and technology competition;Interest-oriented;Innovation
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发布时间：2022-09-02 - 摘要：This paper gave an example of the course "polymer materials processing technology" teaching practice,which is based on the teaching theory of hybrid teaching model, and constructed the "Polymer Materials Processing Technology" teaching hybrid teaching model consisted of small private online course (SPOC) and classroom discussions, and the promotion of hybrid teaching model on the comprehensive ability of students were investigated. The results showed that it is feasible and effective to integrating hybrid teaching model into classroom teaching. The new teaching model will promote the student to acquire the fundamental knowledge by online open courses, and construct the knowledge system in fulfilling the test,transfer knowledge in the discussion the engineering case, exerting a positive effect to the cultivation of students' comprehensive ability.关键词：Hybrid teaching model;Online open courses;Polymer Materials Processing Technology
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发布时间：2022-09-02
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