气体分离复合膜的聚丙烯腈支撑底膜的制备与表征  

Preparation and characterization of polyacrylonitrile substrate membrane for gas separation

作　　者：王连军[1] 李杨[1] 胡义 孙健 李泰胧 吕权 李恕广 

机构地区：[1]大连理工大学,大连116024 [2]大连欧科膜技术工程有限公司,大连116035

出　　处：《膜科学与技术》2015年第2期48-52,共5页Membrane Science and Technology

基　　金：国家自然科学基金重点项目(21034001);国家科技支撑计划项目(2013DAH03B01)

摘　　要：采用相转化法,以聚丙烯腈聚合物为制膜材料,研究了聚合物的浓度、凝胶浴温度、挥发时间及各种添加剂对膜结构和性能的影响.采用扫描电子显微镜、凝胶渗透色谱等手段对底膜进行了表征.结果表明,采用增加聚合物的浓度、降低凝胶浴温度或加长挥发时间,以及在一定范围内增加添加剂H2O、ZnCl2和正丁醇含量等方法,都可以明显改变膜性能,使膜断面由大空腔结构趋向海绵孔结构.制备了具有海绵孔断面结构的,用作气体分离复合膜底膜的PAN超滤膜.In this study, Polyacrylonitrile （PAN） was used to prepare the substrate membrane with sponge-like cross section for gas separation composite membrane. The influences of polymer concentration, temperature of coagulation bath, evaporation time and introduction of additives on membrane performance were investigated by Scanning Electron Microscopy and Gel Permeation Chromatography. It indicated that increasing polymer concentration, evaporation time, amount of additives （H2O, ZnCl2 and 1-Butanol） and decreasing temperature of coagulation bath, were all effective methods to regulate the membrane performance and obtain the membrane with sponge-like structure.

关 键 词：聚丙烯腈 海绵孔 添加剂 膜制备 表征 

分 类 号：TQ051.893[化学工程]