PH-responsive membrane skins by surface-catalyzed polymerization

被引：10

作者：

Bai, Dongshun ^{[1
]}

Elliott, Steven M. ^{[1
]}

Jennings, G. Kane ^{[1
]}

机构：

[1] Vanderbilt Univ, Dept Chem Engn, Nashville, TN 37235 USA

来源：

CHEMISTRY OF MATERIALS | 2006年 / 18卷 / 22期

关键词：

D O I：

10.1021/cm061533v

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The modification of alumina membranes with ultrathin polymer skins that exhibit large pH-responsive properties was investigated. A new surface catalyzed polymerization process to grow polymethylene (PM)-rich copolymer films with randomly distributed ester side chains. The process enables the growth of copolymer films with controlled film thickness in the range to several hundred nanometers by controlling polymerization time and monomer concentrations. PM-CO2H skins was used to examine the effect of solution pH on ion transfer. A thin layer of chromium followed by gold onto the feed side of alumina membranes with 20 nm pore sizes was deposited. Copolymer films are then grown selectively from the gold surface by immersion of the entire membrane in an either solution at 0 °C containing 2 mM diazomethane (DM) and 160 mM ethyl diazoacetate. It was observed that the response of the film can be related to its composition as determined by RAIRS analysis of copolymer films.

引用

页码：5167 / 5169

页数：3

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