最新刊期
卷 27 ， 期 4 ， 2014
- 摘要：In this paper, the biomimetic synthesis of silica material was reviewed, the characteristics and simulation methods of template molecules in vitro biomimetic synthesis of SiO2 materials was summarized. We explained the influence of concentration,type of anions and different types of synthetic template matrix on SiO2 size and morphology,and put forward the new ideas on biomimetic mineralization of SiO2. So,we were inspired to design and synthesize a stable kind of polypeptides with catalytically activity, and using this production as a template to design and synthesize inorganic SiO2 material with special structure and properties,which could be applied in biological catalysis,drug delivery and other fields.关键词：Multi-level silica;Biomineralization;Biological macromolecules;in vitro
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发布时间：2022-09-18 - 摘要：Fullerene C60 owns the perfect structural symmetry and unique physical and chemical properties. It is believed that C60 has much potential in biomedical, superconductivity, optics and catalysis and so on. But its poor solubility in water and compatibility with the organism limit its application. So people synthesize a variety of water-soluble C60 derivatives and study their application. This article mainly reviews the research of water-soluble C60 derivatives in the biomedical field for recent years, including cancer treatment,drug or gene carrier, antioxidation, interaction with enzymes,cytotoxicity. In addition,the study prospects on these derivatives are also included.关键词：Fullerene;Water-soluble;Fullerene derivatives;Cancer treatment;Drug carrier
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发布时间：2022-09-18 - 摘要：Firstly, the structure of keratin and its classification and extraction method were introduced. Then, being acted as natural polymer materials, keratin modification, material preparation and its application fields were reviewed. Keratin materials were modified commonly used physical blend and grafted polymerization methods. Keratin was applied to prepare environmentally friendly composite materials,while the degradation of keratin mainly adopt microbial and enzymatic hydrolysis. Keratin materials have good biocompatibility and biodegradability owing to the keratin hydrolysis can obtain many kinds of amino acid. Keratin was used as medical materials,drug release materials,daily materials, food packaging materials,plastic materials. It was also used as a good adsorbent of heavy metal ions and waste water decoloring agent. In summary, the keratin materials development and application has a very promising future.关键词：Keratin materials;Biodegradable polymer materials;Functional polymer materials;Bio-functional materials
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发布时间：2022-09-18 - 摘要：Diketopyrrolopyrrole(DPP) was introduced to Donor-acceptor polymers due to its excellent copianarity and strong ability of electron-withdrawing. It controls energy level as well as band gap to broaden responding range of visible spectrum. To date,DPP based polymers have attracted widespread attention and aquired a photoelectric conversion efficiency of 9. 64%. This paper studies the research of donor-acceptor narrow band gap polymers,which, DPP unit act as accepter and some electron-rich group such as thiophene derivatives, benzodithiophene (BDT) as donor. As well as inner relation of structrue of material and properties of polymer solar cells.关键词：Diketopyrrolopyrrole;Solar cells;Narrow bandgap;Hole mobility;Open-circuit voltage;Short-circuit
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发布时间：2022-09-18 - 摘要：Metal-free anionic polymerization is an important branch of controlled/living anionic polymerization,which has the excellent characterization to initiate alkyl (meth) acrylates monomers at wide temperature range ( - 20~70℃) with narrow molecular weight distribution in a controlled/living manner. This method provides an effective method to design and synthesize homopolymer, block copolymer, graft copolymer and functional polymer of alkyl (meth) acrylates. This paper reviews the pass and recent developments in metal-free anionic polymerization of alkyl (meth) acrylates using different initiators, including the mechanism of reaction, reactive characterizations,investigation situation and future prospect.关键词：Metal-free anionic polymerization;Room temperature;Living polymerization;Alky (methyl)acrylate
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发布时间：2022-09-18 - 摘要：The dynamics of jet falling process during melt electrospinning was studied using high-speed camera. Phenolic microspheres were chosen as marking particles of the flying jets to observe and measure the falling distance and draw ratio. The results showed that it was three dimensional dynamic process with whipping motion and had three stages of plummeting stage, unstable stage and curing stage. Changes of swinging angle, swinging radius and deposition area of experimental resultant fibrous film during the jet falling process under different applied voltages were studied. It was found that whipping motion of flying jets was suppressed with the increase of the applied voltage. Stretching and thinning mechanism of the flying jets were also investigated. It was found that the flying jets underwent three distinct morphological changes, namely stretching from one end,tug of war-style stretching and solidification.关键词：Melt electrospinning;High-speed camera;Jet falling process;Whipping motion;Stretching and thinning mechanism
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发布时间：2022-09-18 - 摘要：Phosphomolybdic acid /PMMA composite fiber were prepared by electrospinning technique. Effect of relative molecular mass,phosphomolybdic acid PMMA and mixed solvent volume ratio of DMF and ethanol on composite fiber morphology and diameter were investigated. The morphology of composite fibers was observed by scanning electron microscopy (SEM). And the electrical conductivity,viscosity and surface tension in different conditions of spinning solution were tested. It was found out that the relative molecular weight of PMMA and the volume ratio of DMF and ethanol had obviously effect on composite fiber morphology. The diameters of composite fibers were significantly affected by the content of phosphomolybdic acid. The ideal spinning conditions is as follows: the weight average molecular weight of PMMA is 60000, the content of phosphomolybdic acid spinning solution is 16mg/mL, the volume ratio of DMF and ethanol is 6:4.关键词：Phosphomolybdic acid;Polymethyl methacrylate;Electrospinning;Composite fiber morphology
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发布时间：2022-09-18 - 摘要：The waterborne epoxy anti-corrosive emulsion was prepared by phase inversion with nonionic surfactant made in the laboratory and epoxy resin E-20,and the influence factors about the technique of epoxy resin emulsification was investigated which focuses on the complex performance of the emulsion, the specific conditions include: the proportion of each material in the epoxy resin emulsion system, temperature and stirring speed of emulsification system. The results show that the stablest emulsion with the film which has the best complex performance that includes mechanical property and anti-corrosion property was prepared as the content of emulsifier at 12. 5 %,the content of complex solubilizer at 11. 5 % , emulsification temperature in 30℃,stirring speed at 300r/min.关键词：Waterborne epoxy emulsion;Phase inversion;Technique emulsification
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发布时间：2022-09-18 - 摘要：A series of PVP-P(AAEA-co-AA)s-IPN(PVP-SIPN)hydrogels were obtained via solution polymerization using PVP as the second network, PVP-P(AAEA-co-AA)/gold nanoparticlescomposite hydrogels(GNPs gel) were synthesis via in situ reduction. The swelling/deswelling properties, temperature sensibility and electric responsive of the hydrogels were studied. The result shows that with the increasing dosage of PVP, the swelling rate, the equilibrium swelling degree diminished; the water-retention rate decreased with the increasing dosage of PVP when the dosage is lower than 5%, however, the water-retention rate rise with the increasing dosage of PVP when the dosage is higher than 5%; the VPTT of the PVP-SIPN hydrogels increased slightly and the temperature sensibility weakened. The addition of gold nanoparticles cut down the equilibrium swelling degree of GNPs gel from 82.3g/g to 22.66g/g. With tha applied voltage, GNPs gel show up a different swelling/deswelling properties, when the dense of ion outside over 0.2mol/L, the hydrogel conducted swelling, on the contrast, it conducted deswelling, and the deswelling ratio of GNPs gel increased with the increasing of the voltage.关键词：Hydrogels;Gold nanoparticles;Temperature sensibility;Electrical sensitivity
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发布时间：2022-09-18 - 摘要：Polymerizable surfactant monomers (abbreviated as surfmers) are a kind of functional surfactants, which not only have hydrophobic and hydrophilic groups but also contain polymerizable vinyl double bonds. The special molecular architecture imparts them unique physicochemical properties: amphipathic property and polymerizability. Surfmers as novel polymerizable monomers have wide application value in the field of industrial production and scientific research. This review briefly summarizes synthesis and properties of six kinds of surfmers with different charges and their application. New trends and future perspectives of their research area are also proposed.关键词：Surfmer;Cationic;Anionic;Noionic;Ion-paired;Zwitterionic;Gemini
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发布时间：2022-09-18 - 摘要：Based on the tendency of popularity in nowadays higher education in China, and on the fact that most students majoring in engineering are weak in physics, the conception and the outline of the object approaching and multi-dimensional teaching in polymer physics have been suggested, upon the comprehensive analysis on the recognition principles of human beings and the characteristics of the course. From the sensory awareness of the structural and property characterizations or evaluations of polymers, the students get to learn the abstract concept focusing on the statistics and dynamic of polymer chains. Through the multi-dimensional studies and activities on research, practice, training, seminar, and literature reading and discussion, the students further grasp and understand the knowledge.关键词：Polymer physics;Object approaching;Multi-dimensional teaching
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发布时间：2022-09-18 - 摘要：According to the features of coating chemistry and the requirements for major of material physics,we explored the inquiry teaching and courses teaching during the course of Coating Chemistry theory teaching. The students were encouraged to be bold in exploration and practice. On the other hand, the unpalatable theory, which is difficult to express clearly was found to be very familiar and intuitively clear to most students in the courses teaching. In addition, the experimental teaching was found to be a good way to improve the students’ manipulative ability. While practice teaching could promote application of professional knowledge.关键词：Coating chemistry;Theory teaching;Experimental teaching;Practice teaching
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发布时间：2022-09-18
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