Modi. cation of polysulfone membranes via surface-initiated atom transfer radical polymerization
Modi. cation of polysulfone membranes via surface-initiated atom transfer radical polymerization
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莫迪。
DOI：
10.1016/j.apsusc.2009.06.075
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发表时间：
2009-08-15
影响因子：
6.7
通讯作者：
Shi, Jun-Li
中科院分区：
文献类型：
--
作者：
Dong, Han-Bang;Xu, You-Yi;Shi, Jun-Li
通过表面引发原子转移自由基聚合（ATRP）在氯甲基化聚砜（CMPSF）膜表面接枝亲水性聚乙二醇甲基醚甲基丙烯酸酯（P（PEGMA））和聚甲基丙烯酸缩水甘油酯（PGMA）刷。在ATRP之前，先对PSF进行氯甲基化，然后通过相转化法将所得CMPSF制备成多孔膜。结果表明，CMPSF膜表面上的氯化苄基团提供了有效的大分子引发剂来接枝明确定义的聚合物刷。用1H-1 NMR确证了CMPSF的结构。通过增重测量来确定P（PEGMA）和PGMA的接枝率。衰减全反射傅里叶变换红外光谱（ATR-FTIR）和X射线光电子能谱（XPS）证实了P（PEGMA）和PGMA链的接枝。水接触角的测定表明，P（PEGMA）和PGMA接枝链的引入显著提高了聚砜膜的表面亲水性。考察了P（PEGMA）和PGMA固定化对膜形态、渗透性能和抗污染性能的影响。结果表明，P（PEGMA）和PGMA接枝改性后聚砜膜的纯水通量提高，亲水性改善，抗蛋白质吸附能力增强。而大分子单体P（PEGMA）的加入，使聚砜膜的性能明显优于大分子单体PGMA。(C)2009爱思唯尔有限公司版权所有。
Hydrophilic poly((poly(ethylene glycol) methyl ether methacrylate) (P(PEGMA)) and poly(glycidylmethacrylate) (PGMA) brushes were grafted from chloromethylated polysulfone (CMPSF) membrane surfaces via surface-initiated atom transfer radical polymerization (ATRP). Prior to ATRP, chloromethylation of PSF was performed beforehand and the obtained CMPSF was prepared into porous membranes by phase inversion process. It was demonstrated that the benzyl chloride groups on the CMPSF membrane surface afforded effective macroinitiators to graft the well-defined polymer brushes. H-1 NMR was employed to confirm the structure of CMPSF. The grafting yield of P(PEGMA) and PGMA was determined by weight gain measurement. Attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy and X-ray photoelectron spectroscopy (XPS) confirmed the grafting of P(PEGMA) and PGMA chains. Water contact angle measurements indicated that the introduction of P(PEGMA) and PGMA graft chains promoted remarkably the surface hydrophilicity of PSF membranes. The effects of P(PEGMA) and PGMA immobilization on membrane morphology, permeability and fouling resistance were investigated. It was found that P(PEGMA) and PGMA grafts brought higher pure water flux, improved hydrophilic surface and better anti-protein absorption ability to PSF membranes after modifiation. And evidently, macromonomer P(PEGMA) brought much better properties to the PSF membranes than PGMA macromonomer. (C) 2009 Elsevier B.V. All rights reserved.