PVDF/TiO_2复合平板超滤膜的制备与性能研究  

Preparation and performance researches on PVDF/TiO_2 composite ultrafiltration flat membrane

作　　者：王斯维[1] 文晨[1] 朱愉洁[1] 肖长发[2] 

机构地区：[1]天津工业大学环境与化学工程学院,天津300160 [2]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

出　　处：《天津工业大学学报》2010年第5期1-5,共5页Journal of Tiangong University

基　　金：国家重点基础研究发展计划(973计划)项目(2006CB708602)

摘　　要：采用自制纳米TiO2溶胶、商品化纳米TiO2粒子溶胶表面涂覆PVDF膜制得PVDF/TiO2复合膜.通过纯水通量、截留率、接触角以及抗污染性能等实验,考察了不同粒径、浓度的纳米TiO2溶胶对PVDF膜性能的影响,并利用FT-IR和SEM表征了该复合膜的微观构造.结果表明:复合膜的分离性能得到提高,且自制纳米TiO2溶胶改性的PVDF膜综合性能较优异,其接触角由改性前的85.0°降至46.0°,并且去离子水清洗50min后,通量恢复率稳定在95%以上;FT-IR分析显示,复合膜表面羟基数有所增加;SEM观察表明,在PVDF膜表面镶嵌和吸附有一定量纳米TiO2粒子使复合膜呈现出良好的抗污染性能.A PVDF/TiO2 composite membrane was prepared by coating the membrane surface with TiO2 sol and novel TiO2 solution.By some experiments such as flux,retention rate,contact angle and anti-fouling properties,the effects of varying size and concentration of TiO2 sol and TiO2 solution coating on the PVDF/TiO2 composite membrane were studied,and the structure and micromorphology were characterized by FT-IR and SEM re-spectively.The results indicate that the separation performance of the PVDF/TiO2 composite membrane have been improved significantly.Among them,the membrane coating with the self-made TiO2 sol shows its out-standing performances,whose contact angle reduces from 85.0° to 46.0°,after cleaning with deionized water for 50 minutes,the flux recovery rate has reached over 95% and it is steady-going.It can be concluded from FT-IR that the number of hydroxyl on the surface of modified membrane has been increased significantly.It can be found from the result of SEM that a large number of TiO2 particles are embedded on the surface and porous of the modified membrane,so the anti-fouling property of the membrane has been enhanced.

关 键 词：聚偏氟乙烯膜 TIO2溶胶 复合平板超滤膜 有机-无机复合膜 表面改性 抗污染 

分 类 号：TS102.528.1[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]