TiO_2改性聚偏氟乙烯膜的性能研究  

Performance of TiO_2-Modified Polyvinylidene Fluoride Membrane

作　　者：朱愉洁[1] 文晨[1] 王斯维[1] 朱华章[1] 肖长发[1] 

机构地区：[1]天津工业大学材料科学与化学工程学院,天津300160

出　　处：《化工环保》2009年第3期279-282,共4页Environmental Protection of Chemical Industry

基　　金：国家重点基础研究发展计划(973计划)课题(2006CB708602);国家自然科学基金资助项目(50673077)

摘　　要：采用纳米TiO2水溶胶改性聚偏氟乙烯(PVDF)膜,并用改性膜过滤蛋白质溶液和乳化油废水,探讨了纳米TiO2水溶胶加入量对膜通量恢复率和清洗周期的影响。实验结果表明,当TiO2质量分数为0.10%时,改性膜PVDF-1的膜通量恢复率最高,过滤蛋白质溶液时膜通量恢复率达90%以上,过滤乳化油废水时膜通量恢复率达82%以上。与PVDF膜相比,改性膜的清洗周期均有不同程度的延长,PVDF-1改性膜过滤蛋白质溶液和乳化油废水时的清洗周期最长,分别达370min和400min。水滴与PVDF膜的接触角为93°,与PVDF-1改性膜的接触角为45°,说明改性膜的亲水性能已经明显提高。The polyvinylidene fluoride （PVDF） membrane was modified by nano-TiO2 hydrosol, and the modified membrane was used to filtrate the protein solution and the emulsified oil wastewater. The effects of the dosage of nano-TiO2 hydrosol on membrane flux recovery rate and cleaning period were studied. The experimental results indicate that when the mass fraction of TiO2 is 0. 10%, the membrane flux recovery rate of the modified membrane PVDF - 1 is the highest, which is more than 90% for the protein solution and more than 82% for the emulsified oil wastewater. Compared with the PVDF membrane, the cleaning periods of modified membranes are all extended at different degree, and the longest cleaning periods of modified membrane PVDF-1 are 370 min for the protein solution and 400 min for the emulsified oil wastewater. The contact angles of water drop with membrane are 93° for PVDF and 45° for PVDF-1, which indicate that the hydrophilicity of the modified membrane is significantly improved.

关 键 词：聚偏氟乙烯 二氧化钛 改性 膜 自清洁 蛋白质 乳化油 废水处理 

分 类 号：TQ028.8[化学工程]