Effect of spraying polyvinyl alcohol solution on the surface of liquid film on the structure and antifouling properties of polyvinylidene membrane

被引：0
作者：
Xu, Lang [1 ]
Wang, Chenyang [1 ]
Shuai, Qi [1 ]
Li, Hongjun [2 ]
Zhang, Hongwei [1 ,2 ]
Zuo, Danying [1 ,2 ]
机构：
[1] Wuhan Text Univ, State Key Lab New Text Mat & Adv Proc Technol, Wuhan 430020, Peoples R China
[2] Wuhan Text Univ, Hubei Prov Engn Res Ctr Ind Detonator Intelligent, Wuhan 430073, Peoples R China
来源：
JOURNAL OF POLYMER ENGINEERING | 2023年 / 43卷 / 03期
关键词：
antifouling property; hydrophilicity; PVDF membrane; spraying PVA solution; two-step method of membrane formation; PVDF MEMBRANE; POLY(VINYL ALCOHOL); SEPARATION; FABRICATION; PVA; POLYMORPHISM;
D O I：
10.1515/polyeng-2022-0198
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Polyvinylidene fluoride (PVDF) membrane was prepared by a two-step method of surface gelation-immersion precipitation. The surface of the scraping solution film was sprayed with polyvinyl alcohol (PVA) aqueous solution to gel the film surface first, and then the liquid film was immersed in a coagulation bath for phase transformation to obtain the surface modified PVDF membrane. The effects of PVA solution with different mass fraction on the structure and properties of PVDF membrane were studied. The results showed that with the increase of spraying PVA mass fraction, the contact angle of the upper surface of PVDF membranes gradually decreased, the porosity and mean pore size of PVDF membranes gradually increased, and the crystallinity of PVDF membranes gradually decreased. The pores on upper surface of the membranes first increased and then decreased, and the finger-like macropore structure appeared inside the membranes, the water flux first increased and then decreased, and the rejection rate increased. Dynamic cycle filtration experiment of bovine serum protein (BSA) solution showed an increase in membrane flux recovery from 68.31 to 95.08% and a decrease in the irreversible fouling rate from 31.69 to 4.92%, indicating an improvement in the hydrophilicity and antifouling properties of the modified PVDF membrane.
引用
收藏
页码：254 / 264
页数：11
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