Sulfobetaine-grafted poly(vinylidene fluoride) ultrafiltration membranes exhibit excellent antifouling property

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题名:	Sulfobetaine-grafted poly(vinylidene fluoride) ultrafiltration membranes exhibit excellent antifouling property
作者:	Chiang,YC;Chang,Y;Higuchi,A;Chen,WY;Ruaan,RC
贡献者:	化學工程與材料工程學系
关键词:	SELF-ASSEMBLED MONOLAYERS;POLY(ETHYLENE GLYCOL);COPOLYMER MEMBRANES;PROTEIN ADSORPTION;SENSITIVE MEMBRANES;PVDF MEMBRANES;SURFACE;POLYMERS;IMMOBILIZATION;POLYMERIZATION
日期:	2009
上传时间:	2010-06-29 17:28:04 (UTC+8)
出版者:	中央大學
摘要:	The zwitterionic sulfobetaine methacrylate(SBMA) was grafted on the surface of poly(vinylidene fluoride) (PVDF) membrane via ozone surface activation and surface-initiated atom transfer radical polymerization (ATRP). The steady adsorption of bovine serum albumin (BSA) and gamma-globulin were investigated to test the antifouling character after SBMA grafting. Hardly any albumin adsorption was observed, as the grafting density exceeded 0.4 mg/cm(2) of polySBMA. The adsorption of gamma-globulin was also greatly reduced. To investigate whether the method, ozone surface activation along with ATRP, was able to graft SBMA inside the pores of the membrane, cyclic filtration tests were performed and the ultrafiltration (UF) membrane of wider pore size was used. The cyclic filtration test for BSA yielded an extremely low irreversible membrane fouling ratio (R-ir) of 13% in the first cycle, and apparently no irreversible fouling was observed in the second cycle. A more stringent test was carried out by passing the gamma-globulin solution. It was found that the virgin PVDF membrane was continuously fouled by gamma-globulin after three cyclic operations, while the polySBMA-modified membrane had the R-ir value as low as 4.7% in the third cycle. The results indicated that the surface modification via ozone surface activation and ATRP could actually penetrate into the pores of a UF membrane. The polySBMA-grafted PVDF membrane was observed to effectively resist the plasma protein adsorption, and exhibited an extremely low biofouling characteristic during filtration. (C) 2009 Elsevier B.V. All rights reserved.
關聯:	JOURNAL OF MEMBRANE SCIENCE
显示于类别:	[化學工程與材料工程研究所] 期刊論文

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