Metadata of CSIR Papers
View Archive Info| Field | Value | |
| Creator |
Singh, S
Jasti, A Kumar, M Shahi, VK |
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| Subject |
Polymer Science
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| Description |
Alkaline membranes also termed as anion exchange membranes (AEMs) have recently become important materials for electrochemical technology, alkaline fuel cells, and electrolyzers. We report a simple synthesis procedure for an anion-exchange silica precursor (AESP) by epoxide ring opening reaction using 3-aminopropyltriethoxysilane (APTEOS) and glycidyltrimethylammonium chloride (GDTMAC). The AESP-poly(vinyl alcohol) (PVA) organic-inorganic hybrid AEM was prepared by the sol-gel method in acidic medium followed by chemical crosslinking of -OH groups via formal reaction. The reported method is a "green" alternative for the production of AEM without the use of any solvent residues or hazardous chemicals. This simplified procedure in aqueous media avoids the use of chloromethyl methyl ether (CME), a carcinogen and harmful to human health. These AEMs (especially AEM-70) were designed to possess all the required properties of a highly anion conductive membrane such as high water uptake (67.3%), ion-exchange capacity (1.36 mequiv g(-1)), and permselectivity (0.94), along with reasonable conductivity (7.61 mS cm(-1)) due to quaternary ammonium group functionality. Electroosmotic studies revealed quite low mass drag and equivalent pore radius (2.31-5.28 A degrees) of the membrane, which are also desirable properties of an efficient AEM. Electrodialytic performance of the AEM-70 membrane revealed its suitability for applications in electro-membrane processes.
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| Publisher |
ROYAL SOC CHEMISTRYCAMBRIDGETHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND
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| Date |
2011-09-20T12:03:10Z
2011-09-20T12:03:10Z 2010 |
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| Type |
Article
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| Identifier |
POLYMER CHEMISTRY
1759-9954 http://hdl.handle.net/123456789/12203 |
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| Language |
English
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