共查询到19条相似文献,搜索用时 62 毫秒
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磁性生物高分子微球的制备方法和研究进展 总被引:11,自引:1,他引:10
磁性生物高分子微球是一种型功能材料,在生物工程、生物医学等方面有广阔的应用前景。本文介绍了磁性生物高分子的制备方法、性质及在固定化酶、靶向药物、细胞分离与免疫分析等领域的应用。 相似文献
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环境响应型智能开关膜的研究进展 总被引:1,自引:0,他引:1
综述环境响应型智能开关膜的制备方法和分类,并分别介绍温度响应型、光响应型、电场响应型、pH响应型以及分子识别响应型等智能开关膜的研究现状. 相似文献
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微孔无机膜的制备与改性 总被引:22,自引:0,他引:22
较系统地介绍了溶胶-凝胶法在膜制备中的应用,对阳极氧化法、化学气相沉积法以及刚刚发展起来的沸石子筛膜、炭膜的制备工艺也做了简单介绍,并对膜的改性技术进行了回顾。 相似文献
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为研制高性能防水透湿织物,在涤纶薄膜基底上沉积了氟碳高分子膜,利用光电子能谱(XPS),表面衰减全反射红外光说(ATR-FT-IR),掠角红外光谱(GAIR)对膜进行了表征,构成该膜的大分子由-C-,-CF-,CF2-和C且分组成,随阒施加能量的增加,缺氟基团-C-和富氟基团CF3-同时增加,这可由分子内分支、交联和双键增加及由它们构成的网状结构增强来解释。 相似文献
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介绍了模板浸取法的原理,综述了其在多孔玻璃膜和多孔有机膜制备中的应用概况,分析了影响多孔膜结构与性能的因素,并对模板浸取法的发展趋势进行了展望。 相似文献
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导热高分子材料研究进展 总被引:32,自引:0,他引:32
讨论了提高聚合物导热性能的途径-合成高导热系数的结构聚合物,用高导热无机填料对聚合物进行填充复合。综述了导热高分子材料的研究成果:聚合物导热的基本概念和影响其导热性能的因素及导热系数的预测理论;聚合物基导热复合材料的选材、复合技术及其应用。指出了导热高分子材料的研究方向--纳米导热填料的研究和开发;聚合物树脂基体的物理化学改性;聚合物基体与导热填料复合新技术的研究和开发;复合材料导热模型的建立、导热机理(特别是聚合物基体与导热填料界面的结构与性能对材料导热性能的影响)及导热通路的形成等;探索高导热本体聚合物材料的制备方法和途径等。对导热高分子材料的研究和开发有重要意义。 相似文献
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It is demonstrated that microporous membranes can be obtained by perforating polymer films with the aid of a needle cliche perforator. 相似文献
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Ibrahim El-Sherbiny Islam Khalil Isra Ali Magdi Yacoub 《Drug development and industrial pharmacy》2017,43(10):1567-1583
Smart materials are those materials that are responsive to chemical (organic molecules, chemical agents or specific agents), biochemical (protein, enzymes, growth factors, substrates or ligands), physical (electric field, magnetic field, temperature, pH, ionic strength or radiation) or mechanical (pressure or mechanical stress) signals. These responsive materials interact with the stimuli by changing their properties or conformational structures in a predictable manner. Recently, smart polymers have been utilized in various biomedical applications. Particularly, they have been used as a platform to synthesize stimuli-responsive systems that could deliver therapeutics to a specific site for a specific period with minimal adverse effects. For instance, stimuli-responsive polymers-based systems have been recently reported to deliver different bioactive molecules such as carbohydrates (heparin), chemotherapeutic agents (doxorubicin), small organic molecules (anti-coagulants), nucleic acids (siRNA), and proteins (growth factors and hormones). Protein therapeutics played a fundamental role in treatment of various chronic and some autoimmune diseases. For instance insulin has been used in treatment of diabetes. However, being a protein in nature, insulin delivery is limited by its instability, short half-life, and easy denaturation when administered orally. To overcome these challenges, and as highlighted in this review article, much research efforts have been recently devoted to design and develop convenient smart controlled nanosystems for protein therapeutics delivery. 相似文献
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Nanoparticles made from biodegradable materials like polyalkylcyanoacrylates are being examined as drug delivery systems. The capacity of these particles to carry a drug can differ subject to the method of manufacture. We studied the adsorption and uptake of doxorubicin by nanoparticles when the drug was added before or after completion of formation of the isobutylcyanoacrylate nanoparticles. The uptake of the drug was measured by ultracentrifugation. The percent of the drug associated with the nanoparticles formed in the presence of the drug was twice that of the other method. However, the affinity of doxorubicin for nanoparticles of either method, determined by the Langmuir and Freundlich isotherms, was the same. The release study indicated that only 4 to 8% of the drug is released in vitro under sink condition. This may suggest that the drug adsorbs strongly on the surface and also associates with the matrix of the nanoparticles. 相似文献