膜科学与技术

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Research on the crosslinked PDDA / CMCNa composite nanofiltration membrane

Authors： Qin Zhenping 1,3, Ren Xiaoyan1, 3, Guo Hongxia2,3 *, Du Ziang1, 3, Ji Shulan1, 3, Zhang Guojun 1,3

Units： 1. College of Environnental and Energy Engineering; 2. College of Materials Science and Engineering, Beijing University of Technology; 3.Beijing Key Laboratory for Green Catalysis and Separation，Beijing 100124，China

KeyWords： composite nanofiltration membrane; Layer-by-Layer; crosslinked

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2016,36(4):19-23

Abstract：

The cross-linked PDDA/CMCNa polyelectrolyte complex membrane has been fabricated by layer-by-layer self-assembly method, using glutaraldehyde (GA) as crosslinking agent and sulfuric acid (H2SO4) as catalyst. The membrane surface was characterized by SEM in comparison with that of the non-crosslinked membrane. The effect of crosslinking agent and sulfuric acid concentration on relative crosslinking degree and nanofiltration performance of the (PDDA/CMCNa)2.0-PAN composite membrane were also investigated. The results showed that: when GA crosslinking agent concentration was 1.0wt%, and the catalyst H2SO4 concentration was 0.3wt%, cross-linking at 30℃ temperature for 24h, the obtained cross-linked (PDDA/CMCNa)2.0-PAN composite membrane showed 94% retention ratio for Rhodamine B along with the flux of 46 L/(m2•h•MPa) under unit pressure at 25℃. Compared to the non-crosslinked composite membrane, the crosslinked composite nanofiltration membrane showed an improved rejection rate and flux, with just 2.0 number of assembly layers.

Funds：

国家自然科学基金项目（21176005，21476005）

AuthorIntro：

第一作者简介：秦振平（1964-），男，陕西省府谷县人，副教授；研究方向为膜科学与化工分离技术 * 联系人：郭红霞，e-mail：hxguo@bjut.edu.cn 电话010-67396110

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