膜生物反应器(MBR)是一种新型高效的污水处理技术，但在运行中存在膜污染问题，仍为限制其大规模应用的一个瓶颈。本项目拟探索一种基于刷形高临界溶解温度(UCST)聚合物改性MBR膜解决膜污染问题的方案。研究将设计制备一种刷形UCST聚合物，并将其与偏氟乙烯(PVDF)共混制备智能自清洁抗污染MBR膜；被污染的改性MBR膜进行清洗时，通过改变清洗水温度控制膜表面刷形UCST聚合物链段伸展膨胀，可以直接破坏污染层并使污染物脱落，从而有效控制膜污染。在此基础上，一方面考察聚合物的制备和制膜条件对改性MBR膜结构和智能自清洁抗污染性能的影响，确立相应的构效关系；另一方面探索改性MBR膜的智能自清洁抗污染原理及其调控机制。本项目旨在提供一种新的策略用于膜清洗时污染物的去除，为MBR膜污染控制提供实验及理论依据。

Membrane bioreactor (MBR) is a practical emerging advanced technology in sewage water treatment. However, the problem of membrane fouling is still 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 a smart self-cleaning MBR membrane modified by a brush upper critical solution temperature (UCST) copolymer. We will design and prepare a novel brush copolymer with UCST properties, blend them with polyvinylidene fluoride (PVDF) to prepare smart self-cleaning membrane. The brush copolymer chain stretching out at the temperature bigger than UCST can repel the foulant and realize the smart self-cleaning during membrane cleaning. On this basis, we focus on the effect of the brush UCST copolymer preparing and membrane fabricating conditions on the membrane structure and its smart self-cleaning performance, establish their structure-activity relationship for seeking a method on improvement of the anti-fouling performance. Besides, we explore the efficient smart self-cleaning performance regulation mechanism of the modified MBR membrane. This project aims at removing the MBR membrane foulants by a new membrane cleaning strategy, and provides the experimental data and theoretical reference for controlling membrane fouling in MBR.