膜科学与技术

疏水性PVDF多孔膜制备工艺优化研究

作者：许胜东，吕晓龙，王汉利，谷杰，郑书云，马荣花，张绍哲

单位： 1省部共建分离膜与膜过程国家重点实验室，材料科学与工程学院，天津工业大学，天津300387； 2含氟功能膜材料国家重点实验室，山东华夏神州新材料有限公司，山东桓台256400

关键词： PVDF, PVDF-CTFE, 非溶剂致相分离法, 共混，疏水性

出版年,卷(期):页码： 2022,42(1):50-56

摘要：

本文将聚偏氟乙烯三氟氯乙烯（PVDF-CTFE）与聚偏氟乙烯（PVDF）以2:3共混，采用正交实验设计方法对多孔膜的制备工艺进行优化研究，结果表明，当聚合物固含量为18wt%，复合添加剂总含量为18wt%，其中丙二醇:聚乙二醇400为1:1时，多孔膜水接触角达到93.8°，拉伸断裂强度为2.63MPa；当壁厚为150nm时，多孔膜超滤水通量达到183L/（m2·h），透气系数达到0.8mL/（m2·s·Pa）。
关键词：PVDF, PVDF-CTFE, 非溶剂致相分离法, 共混，疏水性

In this paper, polyvinylidene fluoride chlorotrifluoroethylene (PVDF-CTFE) and polyvinylidene fluoride (PVDF) are blended in 2:3, and the preparation process of the porous membrane is optimized by the orthogonal experiment design method.The results show that when the solid content is 18wt% and the total content of composite additives is 18wt%, where propylene glycol:polyethylene glycol 400 is 1:1, the porous film has a water contact angle of 93.8°and a tensile breaking strength of 2.63MPa; When the wall thickness is 150nm, the porous membrane ultrafiltration water flux can reach 183L/(m2·h), and the air permeability coefficient can reach 0.8mL/(m2·s·Pa).

许胜东(1993-)，男，河北省沧州市，硕士生，研究方向为膜制备．

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