磺化聚三氟苯乙烯对不同溶剂体系制备聚砜超滤膜结构及性能影响研究  

Effect of sulfonated polytrifluorostyrene on structure and performance of polysulfone ultrafiltration membranes prepared by different solvent systems

作　　者：蒋也 郭小滔 杜丽君 薛冰 杨曙光[1] Jiang Ye;Guo Xiaotao;Du Lijun;Xue Bing;Yang Shuguang(National Key Laboratory of Fiber Material Modification,College of Material Science and Engineering,Donghua University,Shanghai 201620,China;Shanghai Huayi 3F New Materials Co.,Ltd.,Shanghai 200025,China)

机构地区：[1]纤维改性国家重点实验室,东华大学材料科学与工程学院,上海201620 [2]上海华谊三爱富新材料有限公司,上海200025

出　　处：《合成技术及应用》2023年第1期38-43,共6页Synthetic Technology & Application

基　　金：国家自然科学基金项目(52003046)。

摘　　要：本文以聚砜(PSF)为膜材料,磺化聚三氟苯乙烯(SPTFS)为改性剂,采用不同溶剂N,N-二甲基乙酰胺(DMAc)、N,N-二甲基甲酰胺(DMF)、N-甲基吡咯烷酮(NMP)制备了改性聚砜膜。采用扫描电镜、接触角测量仪、孔径分析仪和死端过滤系统研究SPTFS和溶剂对膜结构和性能的影响。研究表明,SPTFS的引入能够改变膜结构,SPTFS改性膜由纯聚砜膜的指状孔结构转变为胞腔状孔或海绵状孔结构。同时,SPTFS能够改善聚砜膜的渗透性能,以DMAc、DMF、NMP为溶剂改性的聚砜膜水通量分别提升了618.7、127.5、194.0 L/(m^(2)·h),同时蛋白质截留率均高于97%,显示出优异的分离性能。In this paper,sulfonated polytrifluorostyrene(SPTFS)as additive and different solvents N,N-dimethylacetamide(DMAc),N,N-dimethylformamide(DMF),N-methylpyrrolidone(NMP)were used to prepare modified polysulfone(PSF)membranes.The effects of additive and solvents on membrane structure and performance were investigated by field emission scanning electron microscopy,contact angle measurement,pore size analyzer and dead-end filtration system.It showed that the introduction of SPTFS could change the membrane structure,the modified membrane exhibited sponge-like or macrovoids cross-sectional structure changed from the finger-like structure of polysulfone membrane.SPTFS also improved the water permeation,the water fluxes of the modified PSF membranes using DMAc,DMF,and NMP as solvents were increased by 618.7,127.5,and 194.0 L/(m^(2)·h),respectively.All prepared membranes exhibited protein rejection higher than 97%,demonstrating excellent separation performance.

关 键 词：磺化聚三氟苯乙烯 聚砜膜 超滤 溶剂 渗透性 

分 类 号：TQ322[化学工程—合成树脂塑料工业]