最新刊期
卷 33 ， 期 1 ， 2020
- 摘要：Mussel foot-byssus proteins (mfps) are well known for their strong adhesive properties at different substrate surfaces and wet/underwater conditions. By incorporating the functional groups (mainly catechols etc.) in mussel adhesion proteins into synthetic polymers, a new research area called mussel-inspired artificial polymers has become the focus of academic researches, aiming at obtaining similar or even superior adhesive properties compared with the natural one. Here, we have summarized the recent progress in mussel protein-inspired polymers, which are categorized according to the types of main chain structures. By studying the relationship between the molecular structure and the functional properties of biomimetic materials, we hope to provide some helpful reference and guidance for the design and synthesis of new functional mussel-inspired materials.关键词：Mussel protein;Catechol;Synthetic polymer;Backbone structure;Biomimetic
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发布时间：2022-08-31 - 摘要：As a new forming technology, 3D printing technology has attracted great attention in recent years. However, the common monomer printing consumables such as PLA and ABS have limited their further application due to their own shortcomings.In this paper, the application and research progress of plant fiber and its extracts reinforced polymer composites in the field of 3D printing were reviewed, with emphasis on the research status of wood fiber, bamboo fiber, straw fiber and other common plant fibers used in 3D printing.The research on 3D printing and the application of polymer reinforced with cellulose, lignin, hemicellulose and other plant fiber extracts are also introduced.At the same time, some problems and modification methods of plant fiber/polymer materials were analyzed and prospected.关键词：Natural fiber;Extractive;Polymer;3D printing
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发布时间：2022-08-31 - 摘要：Polyisobutylene has a good biocompatibility due to its fully saturated structure and the presence of only carbon-hydrogen bonds. Polyisobutylene-based bioinert elastomers have made many advances in recent years, including PIB-poly(methyl methacrylate) (PMMA) for toughening of bone cements; PIB-cyanoacrylate (CA) for intervertebral disk replacement; PIB-based amphipathic networks(APNs) for immunoisolatory membranes and the development of polyisobutylene based polyurethanes(PU) and polyureas. Significant advances have also been made in poly(styrene-b-isobutylene- b-styrene) biomedical materials, including SIBS for drug delivery vehicles, glaucoma diversion tubes, heart valves, and artificial blood vessels. It also looks forward to the future development of polyisobutylene-based bioinert elastomers.关键词：Polyisobutylene;SIBS;Biomedical materials;Bioinert elastomer
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发布时间：2022-08-31 - 摘要：The formation of polymer gels are judged by inverted test tube method and rheological test. The results show that these methods are effective during determining its formation. And according to the analysis of various factors affecting gel formation, it was found that the gels can be prepared when they are in the methanol solvent, R=1.25, 50℃ and the monomer concentration (mass fraction) over 22%. Through the infrared analysis of polyamide amine (PAMAM), N , N-methylenebisacrylamide (MBA) and N-aminoethylpiperazine (AEPZ), it shows that the chemical crosslinking reaction between MBA and AEPZ can be happened and PAMAM is then generated. And infrared analysis of PAMAM with LiBr and PAMAM with no LiBr showed that the cross-linked polyamide amine contained rich hydrogen bonds interaction, which provided a possibility for self-repair of the material. The equilibrium swelling ratio tests of PAMAM-1 (monomer concentration 22%), PAMAM-2 (monomer concentration 27%) and PAMAM-3 (monomer concentration 32%) show that PAMAM-1 has the highest swelling ratio. Through the dynamic modulus tests, we know that the G' of PAMAM-1, PAMAM-2 and PAMAM-3 are 5000Pa, 15000Pa and 24000Pa respectively, indicating that the gels had good elasticity and belonged to chemical crosslinking. The self-repairing process of the material was characterized by PAMAM-3, which indicated that the cross-linked polyamide amine can be repaired by hydrogen bonds and physical interaction, and has potential applications in drug release.关键词：Reversible non-covalent bond;Hydrogen bonds;Crosslinking polyamide amine gels;Self-healing
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发布时间：2022-08-31 - 摘要：In this article, an eco-friendly three-layer waterproof composite with self-healing property is prepared by modification of superabsorbent fibers with epoxy resin, blending with rubber, casting, calendering and vulcanization processes. The microstructure, mechanical properties, oxidation resistance, self-healing property and impermeability were investigated by SEM, FT-IR, TY-8000 universal material testing machine and BTS-001 electric impervious instrument. The results show that the superabsorbent fibers added in composite not only increased tensile strength, up to 1.83MPa, but also enhanced elongation at break, over 700%. The waterproof material was completely cut off. After 24 hours of selfhealing, the incision part showed no visible marks; and the crack completely healed. There was no water leakage within 24 hours. After 48h self-healing, the maximum tensile strength was 2.36 times as previous material and elongation at break reached to 80%.关键词：Multi-effect synergy;Self-healing;Waterproof;Rubber
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发布时间：2022-08-31 - 摘要：Adopt the modified sol-gel method to prepare chitosan and inorganic phase SiO2 form amino-modified crosslinked composite gel to add to polyurethane coating (PU paint) and wood substrate. The result shows that the pore size of amino-modified crosslinked composite gel is 12μm~16μm, it not only preserves the light structure and mesoporous characteristics of gel, but also contains the active organic groups that chitosan has. It has certain adsorption effect on VOCs of PU paint and wood substrate, among which, the adsorption effect of VOCs on fir is the strongest, reaching 72.86%. It is showed that this method has certain operability and it will provide a new method for the prevention and control of wood furniture pollution, which can make it possible to achieve the large-scale enterprise application.关键词：Amino modified-crosslinked chitosan-silica composite aerogel;Mesoporous;Adsorb;Volatile organic compounds(VOCs);Wood furniture
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发布时间：2022-08-31 - 摘要：In order to further improve the flame retardant performance of silicone rubber (SR), the surface modification of silicon powder (SF) was carried out with silane coupling agent. The surface morphology of SR composite was characterized by scanning electron microscope (SEM).The mechanical properties, flame retardant properties and smoke suppression properties of SR composite were studied by LOI, horizontal and vertical test, cone calorimeter (CCT), smoke density test (SDT) and other means. The results showed that the mechanical properties of SR with modified SF were significantly improved when the same quality SF or modified SF was added. Among them, 21%(wt) modified SF/SR composite has the best mechanical and flame retardant properties. Compared with pure SR, the LOI of modified SF/SR composite increased by 15%, pHRR decreased by 86%, the fire growth index decreased by 58%, and the maximum smoke density decreased by 43%.关键词：Silicone Rubber;Silica powder;Flame retardant;Smoke suppression;Mechanical properties
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发布时间：2022-08-31 - 摘要：Full English course is a new measure to expand the field of international education, and also an important aspect to improve the quality of international students. Polymer materials science and engineering includes a wide range of subjects, such as polymer chemistry, polymer physics, polymer preparation engineering, polymer processing, material research methods, molding design and so on. The course 'Polymer Materials Science and Engineering’ is a combined course designed for postgraduates and foreign students. The so online course is flexibly designed in English with novel academic ideas. This paper systematically introduced the experience of the online course characteristic, teaching effect and inspiration of the 'Polymer Materials Science and Engineering’.关键词：Polymer materials and engineering;Online course construction;English courses;Foreign student courses
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发布时间：2022-08-31 - 摘要：Aiming at the existing problem of polymer materials science and engineering professional in the graduation practice, we combined with the requirements of international engineering certification and the graduation goals of the school for graduates, proposed the method that the graduation practice of polymer professional was suitable for the combination of centralized practice and decentralized practice to integrate the graduation practice into the graduation design and graduation thesis, made practice become a part of graduation design and graduation thesis, self-employment in advance, and established a stable base of practice outside the university, it improved the quality of graduation practice, also consolidated and deepened their own professional theoretical level, and improved their operational creative ability and thinking innovation ability, resulting in the increase of comprehensive engineering quality.关键词：Graduation practice;Status analysis;Solutions;Practice base
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发布时间：2022-08-31
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