膜分离技术是废水处理中应用较为先进的新型技术，然而对于工业上广泛使用的有机聚合物膜，膜污染问题仍为限制其大规模应用的一个瓶颈。本项目拟探索一种同时实现膜表面特性和微结构双调控以解决膜污染问题的方案，研究将构建和制备一种具有三种功能特性的新型聚合物不对称改性纳米二氧化硅（P1-SiO2-P2），并将其与聚偏氟乙烯（PVDF）共混成膜，控制条件使P1-SiO2-P2在成膜过程中定向迁移排布，最终在膜表面形成覆盖有亲水性聚合物链段的微纳米粗糙结构，从而赋予共混膜高效抗污染性能。在此基础上，一方面探索P1-SiO2-P2的制备和共混成膜条件对膜结构和抗污染性能的影响，确立相应的构效关系；另一方面探索P1-SiO2-P2/PVDF共混膜的高效抗污染机制。本项目旨在提高膜的抗污染性能，将为解决膜分离技术在废水处理应用中存在的膜污染问题提供实验及理论依据。

Membrane separation is an emerging advanced technology in wastewater treatment. However, the problem of membrane fouling is considered as a bottleneck for the popular organic polymer membrane in the full-scale application. In this project, we will explore a new idea to resolve the problem of membrane fouling, based on the bi-regulation control of the surface properties and microstructure of the membrane. We will prepare a novel kind of polymer asymmetric modified silica nanoparticles with tri-functional properties（P1-SiO2-P2）, blend them with polyvinylidene fluoride（PVDF）to prepare P1-SiO2-P2/PVDF membrane, control the conditions to make directional migrate and become exposed at the surfaces of the membrane and the pore walls, endow the surface with micro/nano-structures and hydrophilic polymer chains enrichment. On this basis, we focus on the effect of preparing membrane conditions on the structure and performance of the final membrane, establish their structure-activity relationship for seeking a method on improvement of the anti-fouling performance. Besides, we explore the efficient anti-fouling mechanism of P1-SiO2-P2/PVDF membrane. This project aims at improving the anti-fouling properties of the membrane, and provides the experimental data and theoretical reference for solving the common problem of membrane fouling in wastewater treatment.