摘要
以丙烯酸(AA)为单体、碱化聚偏氟乙烯(HPVDF)为基材,通过自由基接枝共聚与碱诱导沉淀相转化连续进行的“一锅法”过程,制备了高亲水性聚偏氟乙烯-g-聚丙烯酸钠(PVDF-g-PAAS)超滤膜(FAS)。探讨了聚合反应及相转化条件对FAS理化性质、微观形貌及蛋白质污染行为的影响规律。结果表明,随着接枝体系料比(AA/HPVDF)和料液比(w(HPVDF))的增大,FAS表面由平整变为褶皱,断面由指状孔向海绵状过渡。FAS系列的初始水接触角均低于60°,在10s内完全润湿,牛血清白蛋白(BSA)截留率大于90%。料比为6/12时得到的FAS12-6的AA接枝率最高,纯水通量达565.83L/(m^(2)·h),清洗通量恢复率达94.62%,4次循环后稳态通量衰减低于8%,干后再润湿的纯水通量恢复率达81.6%。
The high hydrophilic polyvinylidene fluoride graft sodium polyacrylic acid(PVDF-g-PAAS)ultrafiltration membranes(FAS)were prepared using acrylic acid(AA)as monomer and alkaline polyvinylidene fluoride(HPVDF)as membrane material by continuous"one-pot"process of radical grafting copolymerization and immersion precipitation phase inversion.Effects of reaction conditions on physical and chemical properties,morphologies and protein contamination behavior of FAS were investigated.The results show that with the increase of material ratios(AA/HPVDF)and material-liquid ratios(w(HPVDF))of the grafting systems,the FAS surface changes from flat to wrinkled and porous,the cross-section transitions from finger to sponge.The initial water contact angles of FAS series membranes are all below 60°and wetted within 10 s,and bovine serum albumin(BSA)rejection is greater than 90%.The grafting rate of the FAS12-6 obtained at the AA/PVDF of 6/12 is the highest,the pure water flux reaches 565.83 L/(m^(2)·h),the recovery rate of cleaning flux reaches 94.62%,the initial flux decay is less than 8%after 4 cycles,and the recovery rate of pure water flux after drying reaches 81.6%.
作者
陈嘉智
孟晓荣
朱俊锋
田玉瑞
周文帅
王旭东
Jiazhi Chen;Xiaorong Meng;Junfeng Zhu;Yurui Tian;Wenshuai Zhou;Xudong Wang(School of Chemistry&Chemical Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;School of Environmental&Municipal Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;Research Institute of Membrane Separation Technology of Shaanxi Province,Xi’an 710055,China)
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2021年第5期79-86,92,共9页
Polymer Materials Science & Engineering
基金
陕西省科技统筹创新工程项目(2017ZDCXL-GY-07-03)
西安市科技创新引导项目(201805033YD11CG17(4))
陕西省技术创新引导专项(2018HJCG-18)
陕西省科技创新团队(2017KCT-19-01)
大学生创新创业训练计划(201910703037)。
关键词
聚偏氟乙烯接枝聚丙烯酸钠
一锅法
接枝共聚
高亲水
超滤膜
抗蛋白质污染
polyvinylidene fluoride graft sodium polyacrylic acid
one pot method
graft copolymerization
high hydrophilic
ultrafiltration membrane
protein pollution resistance
