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论文类型：期刊论文

发表时间：2014-10-01

发表刊物：DESALINATION

收录刊物：SCIE、EI、Scopus

卷号：350

页面范围：95-101

ISSN号：0011-9164

关键字：Nanofiltration; Hollow fiber composite membrane; Sulfonated poly(phthalazinone ether sulfone); High temperature resistance

摘要：Sulfonated poly(phthalazinone ether sulfone)/poly(phthalazinone ether sulfone) (SPPES/PPES) hollow fiber composite nanofiltration membrane was prepared by coating a SPPES layer on top of the PPES hollow fibers via the dip-coating method. Effects of the composition of coating solution and preparation conditions as well as the operating conditions on the performance of the SPPES/PPES composite membrane (CM) were investigated. It was found that an optimum rejection ratio of CM1 for 1000 mg/L Na2SO4 solution was 93.6%, and the pure water flux was 8.7 L/(m(2).h) under an operating pressure of 0.35 MPa at 20 degrees C. The flux of CM1 can be up to 58 L/(m(2).h) with the operating temperature increased from 20 degrees C to 90 degrees C, while the rejection for 1000 mg/L Na2SO4 solution only had a slight change at the pressure of 1.0 MPa. Furthermore, a short time stability measurement for about 200 h proved that the SPPES/PPES composite membrane had much better performance at a high operating temperature. Finally, a back-washing method was used to clean the pollution substances after the stability measurement, and performance of the composite membrane almost reached the initial value with the hydraulic washing time of 20 min at 50 degrees C under the pressure of 0.3 MPa. (C) 2014 Published by Elsevier B.V.