Preparation and performance of graphene oxide doped reverse osmosis mixed matrix membrane

CHEN Xianhong1 FU Beijia2 ZHONG Mingqiang2 XU Lixin2 ZHOU Yong1 GAO Congjie1

(1.Ocean College, Zhejiang University of Technology, Hangzhou, Zhejiang, China 310014)
(2.College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang, China 310014)

【Abstract】The aromatic polyamide reverse osmosis membrane is poor in anti-fouling performance and chlorine resistance, which is limiting its application in some fields. The commercial reverse osmosis membrane was modified by the secondary interfacial polymerization method of adding graphene oxide (GO) to the oil phase. The separation performance and chlorine resistance of GO-doped reverse osmosis mixed matrix membranes were evaluated. The properties of the membranes were characterized by water contact angle, Zeta potential, scanning electron microscopy (SEM) and atomic force microscopy (AFM). The results show that the addition of GO increases the hydrophilicity, separation performance and chlorine resistance of the membrane. With 30 mg·L−1 GO content, the fluxes and rejection rates of the membrane reach peak values of (77.7 ± 0.9) L·m−2·h−1 and 97.6% ± 0.5%, increasing 38.4% and 4.5%, respectively. When the chlorination intensity is less than 4 800 mg·L−1·h, the changes of water flux and salt rejection rate of the membrane are not obvious.

【Keywords】 reverse osmosis; graphene oxide; secondary interfacial polymerization; membrane; separation;

【DOI】

【Funds】 National Key Research and Development Program of China (2016YFC0401508) National Basic Research Program of China (2015CB655303)

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(Translated by KANG GD)

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This Article

ISSN:0438-1157

CN: 11-1946/TQ

Vol 69, No. 01, Pages 429-434

January 2018

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Article Outline

Abstract

  • Introduction
  • 1 Experimental part
  • 2 Results and discussion
  • 3 Conclusion
  • References