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热致相分离法制备亲水性聚丙烯中空纤维膜

作者：王芳¹，²，王娟¹，²，³，赵雅静¹，²，程兰¹，²，李庆广⁴，李凭力¹，²

单位： 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

关键词：亲水改性；热致相分离法；聚丙烯；聚甲基丙烯酸甲酯

DOI号：

分类号： TQ028.8

出版年,卷(期):页码： 2018,38(3):68-74

摘要：

本文通过热致相分离法(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浓度下的改性聚丙烯中空纤维膜。利用傅里叶红外光谱、X射线光电子能谱、扫描电镜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%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1256L/ (m2 h)，相比于纯聚丙烯膜提高了167%

The hydrophilic character of isotactic polypropylene(iPP) hollow fiber membrane was improved by blendinghydrophilic polymer polymethylmethacrylate(PMMA) via thermally induced phase separation. Hydrophilicity of iPPmembraneswas 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 1256 L/ (m2 h) with 10% of PMMA added, improving by 167% compared to neat iPP membrane.

基金项目：

作者简介：

王芳（1991- ）, 女, 湖北襄阳人, 硕士生, 主要研究聚丙烯膜的制备及改性, E-mail：hbwf77@163.com * 通讯作者, E-mail: lipingli@tju.edu.cn

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