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Preparation and Characterization of Quaternized Chitosan/PS of Composite Nanofiltration Membrane
Authors： Li Saisai  Gao Xueli  Wang Zhi  Gao Congjie
Units： College of Chemistry and Chemical Engineering,Ocean University of China, Qingdao 266100,China
KeyWords： positively charged NF membrane; rimethyl chitosan chloride; epichlorohydrin;cross-linking time
ClassificationCode：TQ028.8
year,volume(issue):pagination： 2013, 33(3):44-48

Abstract：

 A series of novel positively charged nanofiltration membrane having a polysulfone (PS) UF membrane as the substrate were prepared by coating the aqueous solution of trimethyl chitosan chloride (TMC), subsequently crosslinking with epichlorohydrin(ECH). Besides a comprehensive study on preparation of the NF membrane, the effect of cross-linking time on the performance of composite NF membrane was focused specially. The results suggest that the optimal cross-linking time is only 2h, which is greatly shortened when compared with other existing research; The pure water permeability of NF membrane is 14.09 L•h-1 •m-2 •MPa-1, and surface roughness is about 4nm；The rejection of this membrane to the electrolyte solutions decreases in the order of MgCl2,NaCl,MgSO4 andNa2SO4, meeting the Donnan equilibrium mode of the positively charged NF membrane.

Funds：
国家863计划资助项目(2012AA03A602)

AuthorIntro：
李赛赛(1989-)，女，浙江东阳，研究生，膜材料的开发和应用，电话：15966928780，E-mail：lss890315@163.com*通讯作者：高学理，男，高级工程师，硕士生导师，电话：0532-66782723，E-mail：gxl_ouc@126.com

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