The characteristics of crosslinked PAA composite membrane for separation of aqueous organic solutions by reverse osmosis

被引:22
|
作者
Huang, JC
Guo, QH
Ohya, H
Fang, J
机构
[1] Acad Sinica, Guangzhou Inst Chem, Lab Cellulose & Lignocellulos Chem, Guangzhou 510560, Peoples R China
[2] Yokohama Natl Univ, Fac Engn, Dept Mat Sci & Chem Engn, Yokohama, Kanagawa 240, Japan
关键词
crosslinked PAA composite membrane; reverse osmosis separation; aqueous solution of organic;
D O I
10.1016/S0376-7388(97)00337-2
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Crosslinked polyacrylic acid (PAA) composite membranes have been prepared. The reverse osmosis (RO) separation properties of crosslinked PAA composite membrane for aqueous solutions of organics, such as alcohols, amines, aldehydes, acids, ketones, esters, etc., have been studied. It was found that the solute rejection (Ra) and the volume fluxes of solutions (Jv) for 1000 ppm ethanol, ethylamine and ethyl aldehyde reached 66.2%, 51.0%, 84.0% and 0.90x10(-6), 0.40x10(-6) 0.40x 10(-6) m(3)/m(2) s, respectively, in the conditions of 5.0 MPa and 30 degrees C. The solute rejections increased with the increase of the molecular weights of alcohols, amines and aldehydes. The order of solute rejections for alcohols and amines with different structures was tert-->sec-->iso-->n-. The separation results (Ra>70%) for ketones, esters, phenols and polyols have been obtained by the crosslinked PAA composite membrane. The morphology of the membrane has also been observed by SEM technique. (C) 1998 Elsevier Science B.V.
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页码:1 / 11
页数:11
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