Synthesis and Properties of Chemically Cross-Linked Poly(Vinyl Alcohol)/quaterized Hydroxyethylcellulose Ethoxylate (PVA/QHECE) as Novel Alkaline Anion-Exchange Membrane

Abstract:

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A new type of chemically cross-linked polymer blend membranes consisting of poly(vinyl alcohol) (PVA) and quaterized hydroxyethylcellulose ethoxylate (QHECE) have been prepared and evaluated as OH--conducting polymer electrolytes. The OH--conductivity (s) of the membranes was investigated as a function of cross-linking time, blending composition and water uptake. Membrane swelling decreased with cross-linking time, accompanied by an improvement in mechanical properties and a small decrease in OH--conductivity due to the reduced water absorption. The OH--conductivities in the range of 2.7 ×10-4-1.52 ×10-3 S cm-1 were obtained at room temperature (19±2°C), depending on the polymer composition and the content of cross-linking agent. TG analysis showed that the membranes exhibited the thermal stability high up to 350°C when incorporating 75% QHECE. In addition, the membranes displayed a high alkaline stability without losing their integrity and OH--conductivity after conditioning in 6M KOH at 60°C for one week.

Info:

Periodical:

Advanced Materials Research (Volumes 287-290)

Edited by:

Jinglong Bu, Pengcheng Wang, Liqun Ai, Xiaoming Sang, Yungang Li

Pages:

1344-1347

DOI:

10.4028/www.scientific.net/AMR.287-290.1344

Citation:

L. L. Liu et al., "Synthesis and Properties of Chemically Cross-Linked Poly(Vinyl Alcohol)/quaterized Hydroxyethylcellulose Ethoxylate (PVA/QHECE) as Novel Alkaline Anion-Exchange Membrane", Advanced Materials Research, Vols. 287-290, pp. 1344-1347, 2011

Online since:

July 2011

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Price:

$35.00

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