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Preparation of PVDF/SMA-g-PEG blend ultrafiltration membranes by reaction-controlled phase invension

Authors： JIA Xuying，Christine N. Matindi，CUI Zhengyu，LI Jianxin

Units： 1. State Key Laboratory of Separation Membrane and Membrane Process, Tianjin University of Technology, Tianjin 300387; 2. School of Materials Science and Engineering, Tianjin University of Technology

KeyWords： Polyvinyl chloride; Styrene-maleic anhydride; Polymer blend compatibility; Polyethylene glycol; Reaction-controlled phase inversion; Ultrafiltration membrane

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2023,43(5):74-82

Abstract：

The compatibility of PVDF/SMA blends was systematically analyzed according to the calculation and prediction of Schneier mixing enthalpy change theory, Flory-Huggins theory . A PVDF/SMA (88/12 wt./wt.)/DMAC homogeneous casting solution system (polymer concentration of 16 wt.%) was prepared, and PEG with molecular weight of 20 kDa (16 wt.%) was added as additive and ragent to control the esterification reaction between SMA and PEG(50 ℃).With the progress of esterification reaction between SMA and PEG and the synthesis of graft polymer SMA-g-PEG, the solution viscosity increased froml 780 mPa•s to 6580 mPa•s (64 h), and gel occurred. According to the esterification reaction process, the reaction is terminated, and the reaction system is considered as casting solution. The PVDF/SMA-g-PEG ultrafiltration membrane prepared from the casting solution with a reaction time of 48 hours has a pure water permeability up to 480.7 L m-2h-1 bar, a BSA retention rate was 96.6%, and a flux recovery rate was 78.9%. It exhibits excellent anti fouling and separation performance.

Funds：

国家自然科学基金项目“面向镁锂高效分的冠醚基聚酰（亚）胺包覆膜系统构建离子选择性分离机制”（项目编号：22278318）。

AuthorIntro：

贾旭莹（1996-），女，河北人，硕士，研究方向为膜制备，E-mail：18132789681@163.com

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