平板纳滤膜和极细中空纤维纳滤膜表面Zeta电位的测试  

Zeta potential test of flat nanofiltration membrane and ultrafine hollow fiber membrane

作　　者：范云双 宋晓绪[1] 曹占平 孙道宝[3,4] 胡晓宇 FAN Yun-shuang;SONG Xiao-xu;CAO Zhan-ping;SUN Dao-bao;HU Xiao-yu(School of Environmental and Chemical Engineering,Tianjin Polytechnic University,Tianjin 300387,China;State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Membrane Science and Technology,Tianjin Polytechnic University,Tianjin 300387,China;Tianjin Motimo Membrane Technology Co Ltd,Tianjin 300457,China;State Key Laboratory of Membrane Materials and Membrane Applications,Tianjin 300457,China)

机构地区：[1]天津工业大学环境与化学工程学院,天津300387 [2]天津工业大学省部共建分离膜与膜过程国家重点实验室/分离膜科学与技术国家级国际合作研究中心,天津300387 [3]天津膜天膜科技股份有限公司,天津300457 [4]膜材料与膜应用国家重点实验室,天津300457

出　　处：《天津工业大学学报》2018年第2期31-36,共6页Journal of Tiangong University

基　　金：天津市海洋经济创新发展区域示范项目(CXSF2014-24);天津市科技计划项目(16PTSYJC00110)

摘　　要：为了研究平板纳滤膜表面Zeta电位测试中的最佳条件和极细中空纤维纳滤膜表面Zeta电位测试方法,以平板聚酰胺纳滤膜和醋酸纤维素中空纤维纳滤膜为研究对象,根据流动电位法原理,利用Sur PASS固体表面Zeta电位分析仪测试纳滤膜表面Zeta电位,并首次提出醋酸纤维素中空纤维纳滤膜Zeta电位测试方法.实验结果表明:纳滤膜样品测试前需要在超纯水中浸泡2 h以上;平板纳滤膜最佳测试压力为3 k Pa;平板膜样品池的流道最佳高度为100~110μm,测试流量在80~120 m L/min,样品测试结果的标准偏差小于2m V.醋酸纤维素中空纤维纳滤膜在测试前,通过调节样品填充的紧实程度控制测试流量在80~120 m L/min,测试结果的标准偏差小于1 m V.In order to study optimal conditions in Zeta potential measurement of flat nanofiltration membranes and Zeta potential test method of ultrafine hollow fiber nanofiltration membrane,Zeta potential measurement method of nanofiltration(NF)membrane surface including plate NF membrane and hollow fiber NF membrane were studied by SurPASS solid surface Zeta potential analyzer.According to the principle of streaming potential method,Zeta potential test for cellulose acetate(CA)hollow fiber NF membrane was also proposed.Experimental results showed that nanofiltration membrane samples need to be immersed in ultrapure water for more than 2 h before measurements;the best test pressure of plate NF membrane is 3 kPa,the best streaming channel is 100-110μm and the best flow is 80-120 mL/min,the standard deviation of test results is less than 2 mV.The sample filing tightness of cellulose acetate hollow fiber nanofiltration membrane needs to be adjusted before test to control flow rate of 80-120 mL/min.Before the test,by adjusting the tightness of cellulose acetate hollow fiber nanofiltration membrane sample filling to control test flow rate of 80-120 mL/min,the standard deviation of test results is less than 1 mV.

关 键 词：平板纳滤膜 极细中空纤维纳滤膜 ZETA电位 流动电位 电位测试 

分 类 号：TS102.528.1[轻工技术与工程—纺织工程] TS102.54[轻工技术与工程—纺织科学与工程]