Modification of ultrafiltration polyacrylonitrile membranes by sequential grafting of oppositely charged monomers: pH-dependent behavior of the modified membranes

被引:18
作者
Belfer, S [1 ]
机构
[1] Ben Gurion Univ Negev, Inst Appl Res, IL-84105 Beer Sheva, Israel
关键词
grafting onto PAN; ATR-FTIR; layered membranes; alternatively charged monomers;
D O I
10.1016/S1381-5148(02)00191-8
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
The grafting of oppositely charged water-soluble monomers onto:a polyacrylonitrile (PAN) ultrafiltration (UF) membrane and the consequent stratification processes were investigated by means of attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy. The grafting of monomers with sulfo-acidic groups was increased when it was,conducted on a membrane previously grafted with the presence of oppositely charged amine groups increased the grafting of exposed,to buffer solutions having different pH values, their ATR-FTIR spectra revealed that chemical changes had occurred both within the layers and on the surface. The pH-dependent behavior of the bilayered membranes showed that,the first-layer grafts had interpenetrated, to a certain extent, into the second layer of the polyelectrolyte and vice versa. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:155 / 165
页数:11
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