摘要
以亲水性聚(N-羟乙基丙烯酰胺)(PHEAA)、疏水性聚甲基丙烯酸甲酯(PMMA)为链段的两亲性三嵌段共聚物PHEAA-b-PMMA-b-PHEAA(PHMH)为改性剂,以聚偏氟乙烯(PVDF)为基底膜材料,利用非溶剂诱导相分离法制备了PVDF/PHMH基底.与未改性PVDF基底相比,PVDF/PHMH基底表面孔径变小,孔隙率和亲水性增加;与PVDF基底纳滤膜N0相比,通过界面聚合制备的PVDF/PHMH基底纳滤膜N1表面粗糙度大、亲水性强、截留分子量小,N1纳滤膜对Na_(2)SO_(4)的截留率为96.0%,水渗透通量高达304 L·m^(-2)·h^(-1)·MPa^(-1),优于商业化纳滤膜的渗透选择性.
Using polyvinylidene fluoride(PVDF)as a substrate material,an amphiphilic triblock copolymer PHEAA-b-PMMA-b-PHEAA(PHMH)with hydrophilic poly(N-hydroxyethyl acrylamide)(PHEAA)and hydropho⁃bic polymethyl methacrylate(PMMA)chain segments was used as a modifier for fabrication of PVDF/PHMH sub⁃strate via non-solvent induced phase separation method.The surface pore size of the PVDF/PHMH substrate was smaller than that of the unmodified PVDF substrate,and the porosity and hydrophilicity were increased.Compared with PVDF substrate nanofiltration membrane(N0),PVDF/PHMH substrate nanofiltration membrane(N1)prepared via interfacial polymerization exhibited a higher surface roughness,hydrophilicity and lower molecular weight cut-off.The N1 membrane showed a rejection of Na_(2)SO_(4) up to 96.0%and the water permeation flux was 304 L·m^(-2)·h^(-1)·MPa^(-1),which exceeded those of commercial nanofiltration membranes.
作者
杨炎福
王齐齐
张辉
张庆磊
赵军强
赵义平
陈莉
YANG Yanfu;WANG Qiqi;ZHANG Hui;ZHANG Qinglei;ZHAO Junqiang;ZHAO Yiping;CHEN Li(School of Materials Science and Engineering,Tianjin 300387,China;State Key Laboratory of Separation Membranes and Membrane Processes,Tiangong University,Tianjin 300387,China;Beijing Origin Water Membrane Technology Co.,Ltd.,Beijing 101400,China)
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2023年第4期221-227,共7页
Chemical Journal of Chinese Universities
基金
天津工业大学纤维培育基金(批准号:TGF-21-B2)资助。
关键词
两亲性嵌段共聚物
聚偏氟乙烯基底
界面聚合
纳滤膜
渗透选择性
Amphiphilic block copolymer
Poly(vinylidene fluoride)substrate
Interfacial polymerization
Nanofiltration membrane
Perm-selectivity
