Fe^(3+)/TiO_2改性PVDF中空纤维催化膜的制备及表征  

Preparation and characterization of PVDF hollow fiber catalytic membrane modified by Fe^(3+)/TiO_2

作　　者：张瑛洁[1,2] 杨榕[1] 袁明圆[1] 岳显[1] 林茹[1] 马军[2] 

机构地区：[1]东北电力大学化学工程学院,吉林132012 [2]哈尔滨工业大学市政环境工程学院城市水资源开发利用(北方)国家工程研究中心,哈尔滨150090

出　　处：《膜科学与技术》2012年第5期68-73,共6页Membrane Science and Technology

基　　金：国家高技术研究发展计划(863)项目(2009AA06Z310);国家自然基金项目(50978067);国家水体污染控制与治理科技重大专项(2008ZX07421-002;2009ZX07424-005;2009ZX07424-006);吉林省科技发展计划项目(20116022);东北电力大学博士科研启动基金项目(BSJXM-200904)

摘　　要：通过干-湿相转化法制备Fe3+/TiO2改性聚偏氟乙烯中空纤维膜,研究了不同聚合物浓度、改性溶胶量、致孔剂对中空纤维膜性能的影响,并对改性后PVDF中空纤维膜的微观结构、膜成分和催化活性进行了测试.结果表明:随着聚合物浓度的增大,中空纤维膜的水通量减小,截留率增加;改性溶胶的添加,显著提高了膜的亲水性和孔隙率,但机械性能有所降低;添加无水LiCl形成的孔多为网络状孔;高分子致孔剂有助于成指状孔,且水通量、截留率都有很大改善.Fe3+/TiO2/PVDF膜有较强的催化过氧化氢的能力.The poly （vinylidene fluoride） （PVDF） hollow fiber membrane modified by Fe3＋/titania （TiO2） had been prepared by dry-wet spinning process. The effect of polymer concentration, the amount of modified sol and porogen on the properties of hollow fiber membrane was studied and the study on the microstructure, composition and catalytic activity of the modified PVDF hollow fiber membrane were also carried out. The results showed that pure water flux reduced of the membrane and BSA retention rate increased as polymer concentration increased. The addition of Fe3＋/TiO2 sol improved the hydrophilic and porosity of the hollow fiber membrane remarkably, but reduced the mechanical property. The membrane with the addition of anhydrous LiC1 formed meshwork type pore structure while the membrane with the addition of polymer porogen formed finger-like pore, the water flux and BSA retention of the membrane improved greatly. Fe3＋/TiO2/PVDF membrane has a strong catalytic activity to decompose H2O2.

关 键 词：聚偏氟乙烯 Fe3+/TiO2溶胶 多相类芬顿 催化 改性 表征 

分 类 号：TB383.2[一般工业技术—材料科学与工程]