膜科学与技术

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Preparation of polyimide hollow fiber nanofiltrationmembrane by crosslinking

Authors： DONG Xiangling1,2，YU Haijun 1，ZHANG Jingyu 1,2，ZOU Tong 1,2，JIN Yan3，WANG Lina *1，CAO Yiming1

Units： 1 Dalian National Library for Clean Energy (DNL), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China. 2University of Chinese Academy of Sciences,Beijing,100049,China. 3Vontron?Technology?Co.,?Ltd.,?Guiyang?550018,?China

KeyWords： polyimide; SRNF membrane; chemical crosslinking; total saponins of Panaxnotoginsenosides

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2018,38(6):69-75

Abstract：

Polyimide hollow fiber membrane was chemicallycrosslinkedby Polyethyleneimine(PEI) of different molecular weightsand diamines in order to prepare nanofiltration(NF)membrane. The effects of molecular weightof PEI and crosslinking time on membrane separation performance were studied. It was found that membrane separation performance deteriorated with increasing molecular weightof PEI，while it meliorated with prolonged crosslinking time. Pure water permeance(PWP)and rejection of membrane was 0.83Lm-2bar-1h-1 and 97.0% respectively, when PEI600 used as crosslinking agent and crosslinking time was 4h. Membrane crosslinked by ethylenediamine obtained the best separation performance withPWPof 2.58 Lm-2bar-1h-1 and rejection of 82.6%, when separation performances of membranes crosslinked by small molecule diamines were compared. In addition, NF membrane has a soundseparation performance on the total saponins of Panaxnotoginsenosides (tSPN) system。

Funds：

辽宁省自然科学基金面上项目（2015020579），国家重点研发计划（2016YFE0118800）

AuthorIntro：

第一作者简介：董香灵（1993-），女，河南商丘市人，硕士，从事中空纤维纳滤膜的制备及耐溶剂改性能研究，Email: dxl@dicp.ac.cn *通讯作者，Email: wangln@dicp.ac.cn

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