热致相分离法制备亲水性聚丙烯中空纤维膜  

Hydrophilic modification of iPP/PMMA microporous membranes via thermally induced phase separation

作　　者：王芳[1,2] 王娟[1,2,3] 赵雅静[1,2] 程兰[1,2] 李庆广 李凭力[1,2] WANG Fang;WANG Juan;ZHAO Yajing;CHENG Lan;LI Qingguang;LI Pingli(School of Chemical Engineering and Technology,Tianjin University,Tianjin 300350,China;Tianjin Key Laboratory of Membrane Science and Desalination Technology,Tianjin University,Tianjin 300350,China;Weihai Expand Fiber Co.Ltd.,Weihai 264200,China;Hebei Xu Yang Coal Carbonization Co.Ltd.,Dingzhou 073000,China)

机构地区：[1]天津大学化工学院,天津300350 [2]天津大学天津市膜科学与海水淡化重点实验室,天津300350 [3]威海拓展碳纤维有限公司,威海264200 [4]河北旭阳焦化有限公司,定州073000

出　　处：《膜科学与技术》2018年第3期68-74,共7页Membrane Science and Technology

摘　　要：通过热致相分离法(TIPS),利用亲水性聚合物聚甲基丙烯酸甲酯(PMMA)来提高聚丙烯(iPP)中空纤维膜的亲水性,并获得了不同PMMA浓度下的改性膜.利用FTIR、XPS、SEM及接触角测量仪等方法表征了iPP膜的组成、结构以及亲水性等性能.结果表明:PMMA的添加提高了膜的亲水性、水通量;当PMMA的添加量为10%(质量分数)时,接触角从125°降到67°,平均孔径从0.17μm增加到0.30μm,水通量为1 256L/(m2·h),相比于纯膜提高了167%.The hydrophilic character of isotactic polypropylene（iPP）hollow fiber membrane was improved by blending hydrophilic polymer polymethylmethacrylate（PMMA）via thermally induced phase separation.Hydrophilicity of iPP membranes was optimized by variation of PMMA concentration in iPP/PMMA/DBP/DOP blend system using dibutyl phthalate（DBP）and dioctyl phthalate（DOP）as mixed diluent.The compositions,structural morphorlogy and hydrophilicity were characterized by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy,scanning electron microscope and contact angle measuring meter.The experimental results showed that the hydrophilicity and water flux of the blended membranes were enhanced siginificantly due to the addition of PMMA;the contact angle decreased to 67°from 125°and the water flux increased to 1 256 L/（m^2·h）with 10%（mass fration）of PMMA added,improving by 167% compared to neat iPP membrane.

关 键 词：亲水改性 热致相分离法 聚丙烯 聚甲基丙烯酸甲酯 

分 类 号：TQ028.8[化学工程]