膜科学与技术

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Preparation and performance optimization of PVA/PEI composite nanofiltration membrane

Authors： Hou Yingfei1,2,Wang Jinfeng1,Liu Min1

Units： State Key Laboratory of Heavy Oil (China University of Petroleum (East China)), Qingdao 266580;2.Application of vocational and technical institute of petroleum and chemical engineering in xinjiang, kuytun, 833200

KeyWords： poly(ethyleneimine);poly(vinyl alcohol);nanofiltration membrane

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2016,36(6):53-60

Abstract：

In this paper, the polycationic polyethyleneimine ( PEI) as a cationic additive is blended with polyvinyl alcohol ( PVA) to prepare positively charged composite nanofiltration membrane with polysulfone ultrafiltration membrane as supporting layer. The impact of membrane preparation conditions on membrane performance was discussed. The chemical composition, surface morphology and hydrophilic of the film were characterized by infrared spectroscopy, scanning electron microscopy and the contact angle. The results showed that with the increasing of PEI content, the rejection to divalent salt solution firstly increases and then decreases. The results show that the optimum polymerization condition are as follows: the concentration(mass fraction) of PVA and PEI are 2%, PVA: PEI = 8:1, the concentration of glutaraldehyde is 2%, the concentration of sulfuric acid is 1%, dried temperature is 70℃. The membrane prepared under the optimum conditions exhibited a rejection of 94.52% to 2g/L MgSO4 with flux of 5.91 L/(m2•h). A salt rejection order of MgSO4>MgCl2>Na2SO4>NaCl. After adding PEI to the membrane, surface potential and separation performance of the membrane increases and hydrophilic, flux also increased.

Funds：

基金项目：中央高校基本科研业务费专项资金资助（R1504059A）；省部共建分离膜与膜过程国家重点实验室开放课题（M2-201503）

AuthorIntro：

作者简介：侯影飞（1977-），男，籍贯皖，教育程度为博士，现工作于中国石油大学（华东），副教授，研究方向为膜分离，13953223691，houyf@upc.edu.cn

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