复合膜表面电性能对截留性能的影响  

Effect of electrical properties of composite membrane surface on rejection performance

作　　者：傅燕[1] 王薇[1,2] 芮玉青[1] 

机构地区：[1]天津工业大学中空纤维膜材料与膜过程教育部重点实验室,天津300160 [2]天津膜天膜工程技术有限公司,天津300160

出　　处：《天津工业大学学报》2010年第4期10-13,共4页Journal of Tiangong University

基　　金：国家重点基础研究发展计划(973计划)课题(2006CB708602);天津市科技攻关计划项目(06YFGZSH01700)

摘　　要：研究了复合膜的流动电位(ΔE)和Zeta电位(ζ)与无机盐水溶液的浓度及测试压差的关系;并对复合膜的截留性能随操作压力、无机盐溶液浓度和种类等的变化规律进行分析.结果表明:复合膜是负电性的,在低浓度溶液中膜的电荷效应对截留性能有重要影响,而在高浓度溶液中膜的电性能影响不显著;复合膜的透过通量随压力的增加而增大,截留率随压力的增加而增加并趋向于定值;复合膜对无机盐溶液的截留率随溶液浓度的增大而下降,并逐渐趋向于定值;复合膜对二价盐的截留率明显高于一价盐.The effects of the concentration of inorganic electrolyte and operating pressure on the streaming potential（ΔE） and Zeta potential（ζ）are investigated,and the effects of the type,the concentration of inorganic electrolyte solutions and the operating pressure on the separation performance of membranes（such as observed rejections）are also investigated.The experimental results show that composite membrane is negatively charged.In the low concentration solution,the surface electrical properties of composite membrane have a major impact on the separation properties.But the impact of the surface electrical properties is not strong in high concentration solution.The permeation flux of composite membranes increases as the pressure increases,and the rejection rate increases as the pressure increases and tends to the definite value.The rejection rate of composite membranes decreases as inorganic salt concentration increases and gradually tends to the definite value.And the rejection rate of divalent salt on composite membranes is higher than that of monovalent salt.

关 键 词：复合膜 流动电位 ZETA电位 截留性能 

分 类 号：TS102.54[轻工技术与工程—纺织工程] TQ028.8[轻工技术与工程—纺织科学与工程]