【作者】 桂张良； 安全福； 钱锦文；

【Author】 Gui Zhangliang,An Quanfu,Qian Jinwen (MOE Key Laboratory of Macromolecule Synthesis and Functionalization,Department of Polymer Science and Engineering,Zhejiang University,Hangzhou,310027)

【机构】 教育部高分子合成与功能构造重点实验室浙江大学高分子系；

【摘要】 <正>从上个世纪90年代初Decher等报道了基于静电相互作用的层层自组装(Layer-by-layerself-assembly)技术,利用此技术制备的多层膜具有厚度和化学组成纳米尺度可控的特点。LbL技术已广泛的用于制备分离膜、传感器、光电器件和生物医药材料等方面。目前,对阴阳离子聚电解质多层膜的组装与应用已进行了较深入和系统的研究,但基于多层膜的解离还鲜有报道。可以预见,多层膜的解离在缓释药物、纳米图案化和自支撑多层膜的制备等方面具有广泛的应用前景。更多还原

【Abstract】 Three-component multilayer films was prepared by consecutively depositing a polycation blend of poly(4-vinylpyridiniomethanecarboxylate)(PVPMC) and poly(diallyldimethylammonium) (PDDA) with poly(acrylic acid)(PAA).The self-assembly and disintegration behavior of the multilayer films were investigated in details by quartz crystal microbalance(QCM) and atomic force microscopy(AFM).It was found that nanoporous PDDA/PAA multilayer films could be obtained conveniently by partly disintegrating(PVPMC+PDDA)/PAA multilayer films in 0.15M NaCl solution.The diameter of.nanopores decreased and the porosity increased with decreasing pH of blended polycation solutions at the pH range of pH 3.2 to pH 2.8.This method could be used in fiber-optic sensor and controlled release.更多还原