聚丙烯酸/聚砜交联复合膜的反渗透分离性能的研究Ⅰ.膜的制备及其对多种有机物水溶液的分离性能

STUDIES ON THE SEPARATION PROPERTIES OF CROSSLINKED PAA/ PSF COMPOSITE MEMBRANE BY REVERSE OSMOSIS Ⅰ. MEMBRANE PREPARATION AND THE SEPARATION PROPERTIES FOR SOME ORGANIC AQUEOUS SOLUTIONS

用 TDI交联剂交联的方法 ,进行了聚丙烯酸 /聚砜交联复合膜的制备 ,研究了交联剂、添加剂对膜性能的影响 ,并通过扫描电镜观察了膜的截面结构 。

PAA (polyacrylic acid)/PSF (polysulfone) composite membrane has been prepared through TDI crosslinked method. The effects of crosslinked agent and additive on the properties of membrane have been studied. The morphologic structures of PAA/PSF composite membrane has also been observed by SEM .The reverse osmosis (RO) separation properties ofPAA/PSF composite membrane for aqueous solutions of organics, such as alcohols, amines, aldehydes, acids, ketones, and esters etc., have been studied. the solute rejection ( R a) and the volume fluxes of solutions ( J v ) for 1000 ppm ethanol, ethylamine and ethyl aldehyde are 67% , 61.0% , 84.0% , and 0.49 ×10 -6 , 0.43 ×10 -6 , 0.25 ×10 -6 , m 3/m 2·s, respectively in the conditions of 5.0 kg/cm 2 and 25 ℃. The separation results( R a> 70% ) for ketons, esters, phenols and poloyols have been obtained.