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Study on Preparation of Highly Hydrophobic PVDF Porous Membrane

Authors： XU Shengdong, LYU Xiaolong, WANG Hanli, GU Jie, ZHENG Shuyun, MA Ronghua,ZHANG Shaozhe

Units： 1 State Key Laboratory of Separation Membranes and Membrane Processes, School of Material Science and Engineering, Tiangong University, Tianjin 300387, P. R. China; 2 Shandong?Huaxia?Shenzhou?New?Material?Co.?，Ltd，State?Key?Laboratory?of?Fluorine?Containing?Functional?Membrane, Shandong Huantai

KeyWords： PVDF, PVDF-CTFE, Non-solvent induced phase separation, Blend, Hydrophobicity

ClassificationCode：TQ082.8

year,volume(issue):pagination： 2022,42(1):50-56

Abstract：

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).

Funds：

国家自然科学基金项目（21776216）；山东省自然科学基金项目（ZR2019LFG007)

AuthorIntro：

许胜东(1993-)，男，河北省沧州市，硕士生，研究方向为膜制备．

Reference：

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