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Fabrication and Performance of Cellulose Acetate Membranes for Forward Osmosis

Authors： LI Guoliang1,2,3, WANG Jun1,2,*, ZHAO Changwei1,2, HOU Deyin1,2, LIU Huijuan1,2

Units： (1.Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; 2. Beijing Key Laboratory of Industrial Wastewater Treatment and Resource Recovery, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; 3. University of Chinese Academy of Sciences, Beijing 100049, China)

KeyWords： forward osmosis; cellulose acetate; PET mesh; permeability; chemical resistance; fouling resistance

ClassificationCode：X703.1

year,volume(issue):pagination： 2017,37(1):92-99

Abstract：

A polyethylene terephthalate (PET) mesh enhanced cellulose acetate membrane was fabricated via a phase inversion process. The obtained PET mesh embedded membrane shows asymmetric structure with the thickness of 127μm. The mechanical strength is as high as 37.86N. The high hydrophilic membrane has the contact angle of 51.4°, and the porosity is high to 74.2%. The membrane performance shows long term stability after being immersed in the solutions with the pH in the range of 2 to 11. The membrane has well organic fouling resistance and the permeability can be completely recovered by simple cleaning. The performance of the membrane was tested using 0.2mol/L NaCl as the feed solution and 1.5mol/L glucose as the draw solution. The membrane displayed a water flux of 3.78L/(m2•h) and salt rejection of 95.65% in forward osmosis (FO) mode. While in pressure retarded osmosis (PRO) mode, the water flux was 5.34L/(m2•h) and salt rejection 96.25%. The high ratio (0.71) of water flux in FO mode to that in PRO mode indicates that the fabricated membrane has a lower degree of internal concentration polarization(ICP).

Funds：

国家自然科学基金(Nos.51378491，21307149)

AuthorIntro：

作者简介：李国亮(1985-)，男，博士研究生，研究方向为膜技术与应用研究。E-mail: glli@yic.ac.cn *联系作者：王军，研究员；电子邮件：junwang@rcees.ac.cn

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