PVDF ultrafiltration membranes of controlled performance via blending PVDF-g-PEGMA copolymer synthesized under different reaction times

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	PVDF ultrafiltration membranes of controlled performance via blending PVDF-g-PEGMA copolymer synthesized under different reaction times
	Crittenden, John C.; Liu, Baicang; Wang, Shuai; Li, Tong; Chen, Chen
刊名	FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING
	2018-04-01
卷号	12 期号:2 页码:-
关键词	Polyvinylidene fluoride ultrafiltration membrane Amphiphilic copolymer Blended modification High flux Atomic transfer radical polymerization
ISSN号	2095-2201
文献子类	Article
英文摘要	Polyvinylidene fluoride grafted with poly(ethylene glycol) methyl ether methacrylate (PVDF-g-PEGMA) was synthesized using atomic transfer radical polymerization (ATRP) at different reaction times (9 h, 19 h, and 29 h). The corresponding conversion rates were 10%, 20% and 30%, respectively. PVDF was blended with the copolymer mixture containing PVDF-g-PEGMA, solvent and residual PEGMA under different reaction times. In this study, we explored the effect of the copolymer mixture additives with different synthesis times on cast membrane performance. Increasing the reaction time of PVDF-g-PEGMA causes more PVDF-g-PEGMA and less residual PEGMA to be found in the casting solution. Incremental PVDF-g-PEGMA can dramatically increase the viscosity of the casting solution. An overly high viscosity led to a delayed phase inversion, thus hindering PEGMA segments in PVDFg-PEGMA from migrating to the membrane surface. However, more residual PEGMA contributed to helping more PEGMA segments migrate to the membrane surface. The pure water fluxes of the blended membrane with reaction times of 9 h, 19 h, and 29 h are 5445 L.m(-2).h(-1), 1068 L.m(-2).h(-1) and 1179 L.m(-2).h(-1), respectively, at 0.07 MPa. Delayed phase inversion can form smaller surface pore size distributions, thus decreasing the water flux for the membranes with PVDF-g-PEGMA at 19 h and 29 h. Therefore, we can control the membrane pore size distribution by decreasing the reaction time of PVDF-g-PEGMA to obtain a better flux performance. The membrane with PVDF-g-PEGMA at 19 h exhibits the best foulant rejection and cleaning recovery due to its narrow pore size distribution and high surface oxygen content. (C) Higher Education Press and Springer-Verlag Berlin Heidelberg 2017
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/40632]
专题	生态环境研究中心_城市与区域生态国家重点实验室
推荐引用方式 GB/T 7714	Crittenden, John C.,Liu, Baicang,Wang, Shuai,et al. PVDF ultrafiltration membranes of controlled performance via blending PVDF-g-PEGMA copolymer synthesized under different reaction times[J]. FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING,2018,12(2):-.
APA	Crittenden, John C.,Liu, Baicang,Wang, Shuai,Li, Tong,&Chen, Chen.(2018).PVDF ultrafiltration membranes of controlled performance via blending PVDF-g-PEGMA copolymer synthesized under different reaction times.FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING,12(2),-.
MLA	Crittenden, John C.,et al."PVDF ultrafiltration membranes of controlled performance via blending PVDF-g-PEGMA copolymer synthesized under different reaction times".FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING 12.2(2018):-.