纳米Al_2O_3改性PVDF超滤膜的制备及其抗污染性  

Preparation of poly (vinylidene fluoride) ultrafiltration membrane modified by nano-sized alumina and its antifouling performance

作　　者：芦艳[1,2] 于水利[1] 孟丽丽[2] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,哈尔滨150090 [2]大庆石油学院化学化工学院,黑龙江大庆163318

出　　处：《哈尔滨工业大学学报》2009年第10期64-69,共6页Journal of Harbin Institute of Technology

基　　金：国家高技术研究发展计划项目(863-2008AA06Z304);国家博士后基金资助项目(20080440129);国家博士后基金特别资助项目(200902395)

摘　　要：为改善聚偏氟乙烯(PVDF)超滤膜的水通量和抗污染性能,以无机纳米氧化铝粒子作为添加剂与PVDF共混,采用相转换法流延成膜.用接触角测定仪测得膜与水的接触角用以表征膜的亲水性的变化;用扫描电镜(SEM)和透射电镜(TEM)观察膜的表面孔分布和断面孔的结构及纳米颗粒在膜中的分散情况;采用万能电子试验机(W-56)强度测定仪测定膜的机械性能;利用杯试超滤装置对改性膜的抗污染性能进行研究,并对污染膜上的污染物进行了气相色谱和质谱分析.结果表明,纳米Al2O3的加入量(质量百分比)为2%时,改性膜具有较好的水通量、强度和抗污染性能;纳米Al2O3的加入没有改变膜的微观结构.改性膜在保持PVDF有机膜原有特性的基础上,通过改善PVDF膜的表面亲水性而使其通量和抗污染性能得到增强.Organic-inorganic composite membranes were prepared by phase inversion process using nano-sized alumina（Al 2 O3） particles as inorganic additive uniformly dispersed in poly（vinylidene fluoride）（PVDF） in order to improve the flux and antifouling performances of PVDF ultrafiltration membrane.Contact angle between water and the membrane surface was measured by contact anglometer in order to characterize the hydrophlicity changing of the membrane surface.Porous dispersion of the membrane surface,the cross-secti... Organic -inorganic composite membranes were prepared by phase inversion process using nano-sized alumina （Al2O3 ） particles as inorganic additive uniformly dispersed in poly（vinylidene fluoride） （PVDF） in order to improve the flux and antifouling performances of PVDF uhrafiltration membrane. Contact angle between water and the membrane surface was measured by contact anglometer in order to characterize the hydrophlicity changing of the membrane surface. Porous dispersion of the membrane surface, the cross-sectional structures and nanometer particles distribution were examined by scanning electron microscopy （SEM） and transmission electron microscopy （TEM） respectively. Mechanical performances of membranes were measured by omnipotence electronic intensity measuring instrument （W -56）. Antifouling performance of modified membranes was investigated by an ultrafiltration （UF） cup set. Contaminations on the fouled membranes were analyzed by gas chromatography and mass spectrum. Experimental results indicate that the modified membrane has favorable performances such as water flux, intensity and antifouling performances with 2% addition of nanometer Al2O3 particulars. The addition of nanometer Al2O3 particulars can not affect microstructures of the membrane＇s surface and cross-section. On the basis of keeping the traits of PVDF organic membranes, surface hydrophlicity properties and antifouling performances of modified membranes are improved significantly due to nano-size

关 键 词：PVDF 纳米Al_2O_3 改性膜 超滤 膜污染 

分 类 号：TQ050.4[化学工程]