膜科学与技术

PP/POE中空纤维膜的制备及其VMD应用研究

作者：程鹏高，史星星，刘天宇，项军，米国梁，唐娜

单位：天津科技大学化工与材料学院，天津，300457

关键词：中空纤维膜；聚丙烯；POE含量；热致相分离；真空膜蒸馏

出版年,卷(期):页码： 2021,41(1):89-94

摘要：

选用乙烯-辛烯共聚物（POE）作为聚丙烯（PP）共混增韧改性材料，通过热致相分离法制备PP/POE中空纤维膜，研究POE含量对膜性能的影响。结果表明：POE最佳添加量为15%，共混膜的水接触角提高8.5%，平均孔径提高24.83%，真空膜蒸馏（VMD）通量从8.36 kg·m-2·h-1增加到12.60 kg·m-2·h-1，提高了50.72%；膜的拉伸强度提高了12.82%，最大伸长率提高了51.89%。

This study selected ethylene-octene copolymer (POE) as polypropylene (PP) blend toughening modified material to prepare PP/POE hollow fiber membrane by thermally induced phase separation to study the effect of POE content on membrane properties. The results showed that the optimal addition of POE was 15%, the water contact angle of the blend membrane was increased by 8.5%, the average pore size was increased by 24.83%, and the flux of vacuum membrane distillation (VMD) increased from 8.36 kg·m-2·h-1 to 12.60 kg·m-2·h-1, an increase of 50.72%; the tensile strength of the membrane increased by 12.82%, and the maximum elongation increased by 51.89%. In this work, ethylene-octene copolymer (POE) was used as toughening modification material to prepare PP/POE co-blend hollow fiber membrane by thermally induced phase separation. The effect of POE content on membrane properties and performance was investigated. Under optimum condition ( 15%(wt) POE ), the water contact angle, the average pore size, the flux, the tensile strength, and elongation were improved 8.5%, 24.83%, 50.72%, 12.82%, and 51.89%, respectively. The flux of vacuum membrane distillation (VMD) increased from 8.36 kg·m-2·h-1 to 12.60 kg·m-2·h-1.

程鹏高（1982-），男，辽宁海城人，硕士，工程师，主要研究方向：膜与膜过程，海卤水资源综合利用，盐科学，E-mail：cpg@tust.edu.cn

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