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Preparation of polyvinyl chloride ultrafiltration membrane by in situ chemical induced phase conversion

Authors： CHEN Xiaole, SHE Jingguo, GAO Haifu, WANG Xuan, WU Chunrui, LYU Xiaolong

Units： State Key Laboratory of Separation Membranes and Membrane Process, School of Material Science and Engineering, Tiangong University, Tianjin 300387, China

KeyWords： polyvinyl chloride, ultrafiltration membrane, N-β-aminoethyl-γ-aminopropyl trimethoxysilane, in situ chemical induction

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2023,43(4):21-27

Abstract：

Aiming at the problems of insufficient hydrophilicity, permeability and selectivity of ultrafiltration membranes, a simple and efficient in situ chemically induced phase conversion method is designed in this paper. In the cast membrane liquid, NH2-containing modifier N- β-aminoethyl-γ-aminopropyl trimethoxysilane(KH792) is added to the C-Cl bond of polyvinyl chloride (PVC), PVC ultrafiltration membrane was prepared. The influence of KH792 content on the structure and properties of PVC membrane was investigated. The results showed that as the content of KH792 increased from 0% to 12%, the average aperture of PVC film increased from 56.84 nm to 86.33 nm, and more homogeneous pore size distribution compared to the original membrane; porosity increased from 62% to 88%; initial contact angle decreased from 87.5° to 70.68°, dynamic contact angle drop range increased from 8° to 20° within 120s; while the bovine serum albumin (BSA) interception rate was guaranteed to be around 95%, the flux of pure water was increased from 46 L·m-2·h-1 increased to 539 L·m-2·h-1.

Funds：

国家自然科学面上基金项目（51978466，52170047）

AuthorIntro：

陈小乐（1997-），女，山西省大同人，硕士研究生，研究方向为分离膜制备与应用；E-mail：1358470640@qq.com

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