聚偏氟乙烯膜亲水改性研究进展

聚偏氟乙烯以其优异的力学性能和化学性能被广泛用于制备微滤膜、超滤膜、纳滤膜和反渗透膜等水处理膜材料，然而由于其极强的疏水性，使其在用于水处理过程中存在通量低和容易被污染等缺陷，这极大地降低了水处理效率和薄膜的使用寿命，因此对其亲水改性具有重要的实际意义。本文根据改性方法的异同，将近几年来国内外对聚偏氟乙烯膜的亲水化改性研究工作按共混改性、共聚改性、表面接枝改性和表面涂覆改性等方法进行了综述，通过不同改性方法对聚偏氟乙烯水处理膜的亲水效果、渗透能力和防污染性等方面的影响，着重比较讨论了各种改性方法的改性效果及优缺点。最后对未来聚偏氟乙烯膜的亲水改性研究及工业化应用的发展趋势进行了展望。

Research progress of hydrophilic modification of polyvinylidene fluoride membranes

Polyvinylidene fluoride(PVDF),due to its excellent mechanical and chemical properties,has been widely used to prepare microfiltration,ultrafiltration,nanofiltration and reverse osmosis membranes for water treatment. However,its strong hydrophobicity makes it easy get fouled and poor permeability in the water treating process,so it is beneficial to improve the hydrophilic properties by modification. This paper summarized the researches of PVDF hydrophilic modification in recent years from the aspects of blending,co-polymerization,surface grafting and surface coating. By comparing the influence of hydrophilicity,permeability and anti-fouling among various modification methods,we introduced the modification effect and the advantages and disadvantages of various methods. Finally,the trends of PVDF hydrophilic modification research and its industrialization were prospected.