大孔径PVDF平板微孔膜的制备与性能研究  

PREPARATION AND PERFORMANCE RESEARCHES ON PVDF MICROPOROUS FLAT MEMBRANE WITH THE LARGE PORE DIAMETER

作　　者：左丹英[1] 徐又一[2] 张振[1] 

机构地区：[1]武汉科技学院纺织与材料学院,湖北武汉430073 [2]浙江大学高分子科学研究所,浙江杭州310027

出　　处：《水处理技术》2008年第6期8-11,15,共5页Technology of Water Treatment

基　　金：国家(973)计划资助项目(2003CB615705);武汉科技学院校基金项目(20063124)

摘　　要：对大孔径聚偏氟乙烯(PVDF)均质膜的制备及其结构性能进行了研究。结果发现,聚合物浓度、凝固浴组成、添加剂种类是影响膜结构与性能的主要因素。通过对这三个制膜条件的控制及优化,制备出多孔的上下表面、全海绵状孔结构的断面、性能良好、结构可控的PVDF微孔膜。上下表面孔径范围为0.2～3μm,水通量在200～600L/m2·h(0.1MPa)的范围。尤其是纳米TiO2粒子添加剂的加入,使得膜的强度大大提高。PVDF homogeneous fiat membranes with large pore size were prepared and their structure and performance were investigated. The results showed that polymer concentration, the composition of coagulation bath and the sort of additives were the leading thctors on the membrane structure and property. By adjusting and optimizing the preparation conditions, PVDF microporons membranes with the controllable structure and the excellent performance were produced. All PVDF membranes exhibited a porous upper and bottom surfaces and a symmetric cross-section with the sponge-like structure. The range of pore diameter on membrane surfaces was from 0.2 to 3.0μm, and the water fluxes varied from 200 to 600 L/h.m^2 （0.1MPa） with the preparation conditions. Especially, the addition of nano-TiO2 enhanced greatly the membrane strength.

关 键 词：PVDF 相转化 大孔径 海绵状孔 纳米TIO2 

分 类 号：X703.1[环境科学与工程—环境工程]