iPP/TiO2杂化中空纤维微滤膜的制备及其油水分离应用  

Preparation and characterization of iPP/TiO2 hybrid membrane for oil/water separation

作　　者：齐凯丽 徐世昌[1] 杨超环 赵雅静[1] 李英栋[1] 李凭力[1] QI Kaili;XU Shichang;YANG Chaohuan;ZHAO Yajing;LI Yingdong;LI Pingli(School of Chemical Engineering and Technology,Tianjin University,Tianjin Key Laboratory of Membrane Science and Desalination Technology,Tianjin 300350,China)

机构地区：[1]天津大学化工学院天津市膜科学与海水淡化重点实验室

出　　处：《膜科学与技术》2019年第4期8-14,共7页Membrane Science and Technology

摘　　要：在热致相分离法制备聚丙烯(iPP)中空纤维膜的过程中,通过添加疏水性TiO2纳米颗粒来提高膜的疏水性能,获得具有不同TiO2添加量的iPP/TiO2杂化膜.利用XRD、SEM、接触角测量仪以及光学显微镜等手段对膜的元素组成、形貌结构、疏水性以及油水分离效果等进行表征.结果表明,TiO2的添加改善了膜的疏水性能,对油包水乳化液表现出优异的分离效果;当TiO 2的添加量为0.5%时,膜的接触角达到147°,平均孔径和孔隙率同步增大,杂化膜的油通量达到了纯膜通量的150%.此外,粒径在0.5~1.5μm范围内的油包水乳化液经iPP Ti 5膜过滤后,其滤液中的水滴在光学显微镜下不可见.Superhydrophobic-superoleophilic isotactic polypropylene(iPP)TiO2 hollow fiber hybrid membrane was successfully produced via thermally induced phase separation(TIPS)method.The elemental composition,morphology,wettability and oil-water separation effect of the prepared membrane were characterized by XRD,SEM,contact angle measuring instrument and optical microscope,etc.The results depicted that,the addition of hydrophobic TiO2 improved the hydrophobicity of the membrane,and the hybrid membranes performed excellent oil/water separation efficiency.When the TiO2 content was 0.5%,the contact angle of the membrane reached 147°,and the average pore size and porosity increased simultaneously.Fortunately,the oil flux of the blend membrane reached 150%of the pure membrane flux.Moreover,the water-in-oil emulsion with a particle size in the range of 0.5~1.5μm was filtered through the iPP-Ti-5 membrane,and the water droplets in the filtrate were not visible under an optical microscope.

关 键 词：聚丙烯中空纤维膜 TIO2纳米颗粒 超疏水超亲油 油水分离 

分 类 号：TQ028.8[化学工程]