非溶剂相分离（NIPS）制膜方法是20世纪60年代发明的一种高效的制膜方法。利用该法制备的不对称膜结构赋予膜优异的选择渗透性能，膜孔结构易于调控，已经成为当前聚合物分离膜研究及商业化生产中普遍采用的方法。聚偏氟乙烯（PVDF）具有优异的综合性能，成膜性能佳，可利用NIPS法制膜。NIPS法PVDF膜的研制、膜结构控制方法及应用研究受到国际膜研究者广泛关注，是分离膜领域热点之一。本文分别针对NIPS法PVDF超滤膜制备的相分离原理研究、膜结构控制方法及膜应用研究等关键研究进展作简要介绍。

The non-solvent phase separation (NIPS) is a highly efficient membrane preparation method which was invented in 1960s. Membranes prepared by NIPS method always possess asymmetric structure with a denser top layer and looser support layer which gives the membranes excellent selectivity and permeability. What’s more， the structure of the membranes could be easily controlled By NIPS method. So it has been widely used in research and commercial manufacture of membranes. Poly (vinylidene fluoride) (PVDF) has excellent chemical and mechanical properties and has been widely used. PVDF ultrafiltration (UF) membranes could be easily prepared by NIPS method. Owing to the excellent separation properties， PVDF UF membranes have been widely used in wastewater treatment， pure water production， pretreatment of seawater desalination， etc. The preparation process， the control method of the micro-pores and the application of PVDF UF membranes have gained most attentions and became worldwide research hot area. In this paper， we made a brief introduction about the research progress on the phase separation theory of PVDF UF membranes prepared by NIPS， membrane structure control method and its application， etc.