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pH-sensitive characteristics of poly(acrylic acid)-functionalized anodic aluminum oxide (AAO) membranes

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pH-sensitive characteristics of poly(acrylic acid)-functionalized anodic aluminum oxide (AAO) membranes.htm (413bytes)
Date
2011-02-21
Author
Song, Cunfeng
Shi, Wei
Jiang, Hairong
Tu, Jing
Ge, Dongtao
葛东涛
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  • 化学化工-已发表论文 [14469]
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Abstract
A simplified method to prepare pore-filled pH-responsive membranes was provided by using anodic aluminum oxide (AAO) membrane as supported matrix. To introduce reactive groups for grafting weak polyelectrolyte, silica-AAO composite membrane was prepared by depositing silica onto the AAO membrane through sol-gel method. The obtained composite membrane keeps the ideal pore structures of the original AAO membrane. Poly(acrylic acid) as responsive polymer was grafted onto the silica-AAO composite membranes by activating with 3-glycidoxypropyl trimethoxysilane. The obtained pH-responsive membranes showed evident pH-sensitivity, and the pH-valve effect was observed at the pH between 3 and 5. Electrochemical impedance spectroscopy demonstrates the membrane resistance increases from 4.3 x 10(5) Omega cm(2) at pH 2 to 1.3 x 10(6) Omega cm(2) at pH 6. (C) 2011 Elsevier B.V. All rights reserved.
Citation
JOURNAL OF MEMBRANE SCIENCE,2011,372(1-2):340-345
URI
http://dx.doi.org/doi:10.1016/j.memsci.2011.02.017
WOS:000289829200037
https://dspace.xmu.edu.cn/handle/2288/11700

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