纳米粒子原位杂化超滤膜的构建及其抗污染机理

项目名称： 纳米粒子原位杂化超滤膜的构建及其抗污染机理

项目编号： No.51278247

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 建筑科学

项目作者： 李健生

作者单位： 南京理工大学

项目金额： 85万元

中文摘要： 以超滤为核心的膜法水处理技术是解决饮用水安全和达标污水回用的重要途径。针对传统聚合物超滤膜抗污染性差的不足，本项目提出构建纳米粒子原位杂化超滤膜并探索其抗污染机理的研究设想。从结构设计出发，将铸膜溶剂中纳米粒子的无水制备和相转化成膜相结合，分析无机物种前躯体在铸膜液体系中的演化、缩聚过程，获得纳米粒子高度分散的原位杂化超滤膜。考察成膜过程中无机物种与高分子链的相互作用及其在膜孔周围的组装行为，剖析制备条件与杂化膜结构的关联性；探究聚合物基体中原位形成的纳米粒子与以天然有机物(NOM)、合成有机复合物(SOC)及胞外聚合物(EPSs)为代表的目标污染物之间的界面作用，揭示原位杂化超滤膜的促进传输机理及抗污染机制，阐明其与目标污染物高效去除的构效关系。通过对这些科学问题的探索，可望解决传统超滤膜通量衰减快、使用寿命短的技术难题，为超滤膜法水处理在饮用水和达标污水回用领域中的应用提供技术支撑。

中文关键词： 纳米粒子；超滤膜；抗污染；原位杂化；界面作用

英文摘要： Ultrafiltration(UF) membrane technology is considered as an important method for filling the requirements of safety of drinking water and reuse of industrial wastewater which meets the discharge standard. However, poor antifouling properties of traditional UF membrane affect its application and usage life. This project dedicates to investgating the improved antifouling mechanism of the hybrid UF membrane prepared by in situ nanoparticles modification route. Based on the structure design of the hybrid UF membrane，in situ hybrid UF membrane with small size and well dispersed nanoparticles will obtained by combination of the synthesis of nanoparticles under water free condition with the preparation of polymer UF membrane via traditional phase separation process. The condensation and evolution of inorganic precursor in ploymer membrane casting solution will be analyzed.Then, more attentions will be focused on the interaction between polymer chain and inorganic species as well as the assembly behaviour of nanoparticles around the pores during the membrane formation process.The relationship between the perparation condition and the structure of the obtained membrane will be analyzed. The interfacial reaction between the in situ formed nanoparticles in polymer matrix and the typical pollutants,e.g.natural organic matt

英文关键词： Nanoparticles；Ultrafiltration membrane；Antifouling；In situ hybrid；Interfacial reaction