甲壳素/聚丙烯腈复合纳滤膜的制备与截留性能研究  

Study of chitin-Na/polyacrylonitrile(PAN) composite nanofiltration membrane

作　　者：高复生[1] 陈国华[1] 陈容[1] 高从[1] 

机构地区：[1]中国海洋大学化学化工学院,青岛266100

出　　处：《膜科学与技术》2008年第1期1-6,共6页Membrane Science and Technology

基　　金：国家"973"项目资助(2003CB615706)

摘　　要：以甲壳素钠溶液为铸膜液,在聚丙烯腈超滤底膜上流延成膜,以环氧氯丙烷的乙醇溶液为交联剂交联制得一种新型的复合纳滤膜.该膜的最佳制备条件为:甲壳素钠溶液浓度为2%,环氧氯丙烷的乙醇溶液浓度为0.6%,在50℃交联18 h.膜负电荷来源于底膜部分水解.膜的静电位为-0.05 mV,电压渗系数为-3.23 mV/MPa;截留分子量为670 g/mol,膜孔半径约0.8 nm.该膜对电解质溶液的截留性能主要决定于荷负电膜对不同电解质离子之间的静电作用力大小.A novel composite nanofiltration membrane was fabricated by coating alkali solution of chitin onto polyacrylonitrile（PAN） UF membrane and subsequently cross-linked by epichlorohydrin（ECH）. The composite nanofiltration membrane with excellent rejection performance should be prepared while CH-Na concentration was2.0 %, epichlorohydrin（ECH） concentration was 0.6 %, cross-linking time was 18h at 50 ℃. The mem-brane had a negative electric charge, which came from PAN membrane＇ s hydrolyzation. The resting membrane potential was -0.05 mV and the etectro-osmotic transmission coefficient（13） was -3.23 mV/MPa; Molecular weight cut-off to PEG was 670 g/mol, the pore radii of the membrane was about 0.8 nm. The rejection capability to electrolyte was determined by static force between the membrane and the ion of the electrolyte.

关 键 词：甲壳素钠 环氧氯丙烷 脱盐率 聚丙烯腈 复合纳滤膜 

分 类 号：TB383.2[一般工业技术—材料科学与工程]