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原位化学诱导相转化法聚氯乙烯超滤膜的研制

作者：陈小乐，厍景国，高海富，王暄，武春瑞，吕晓龙

单位：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

关键词：聚氯乙烯；超滤膜；N-β-氨乙基-γ-氨丙基三甲氧基硅烷；原位化学诱导

DOI号：

分类号： TQ028.8

出版年,卷(期):页码： 2023,43(4):21-27

摘要：

针对超滤膜亲水性不足、渗透性和选择性不能平衡的问题，本文设计了简便高效的原位化学诱导相转化法，在铸膜液中加入可与聚氯乙烯（PVC）的C-Cl键反应的含-NH2的改性剂N-β-氨乙基-γ-氨丙基三甲氧基硅烷（KH792），制备了PVC超滤膜。主要探究了KH792含量对PVC膜结构和性能的影响，结果表明，随着KH792含量从0%增加到12%，PVC膜的平均孔径由56.84 nm增加到86.33 nm，孔径分布相对原膜更加均一；孔隙率由62%提高到88%；初始接触角由87.5°降到70.68°，120 s内动态接触角下降范围由8°增加到20°，亲水性得到提升；在保证牛血清白蛋白（BSA）截留率为95%左右的同时，纯水通量由46 L·m-2·h-1增加到539 L·m-2·h-1。

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.

基金项目：

国家自然科学面上基金项目（51978466，52170047）

作者简介：

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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