Preparation and characterization of polyvinyl alcohol/chitosan blended membrane for alkaline direct methanol fuel cells

被引:102
作者
Yang, Jen Ming [1 ]
Chiu, Hsien Chih [1 ]
机构
[1] Chang Gung Univ, Dept Chem & Mat Engn, Tao Yuan 333, Taiwan
关键词
Polyvinyl alcohol; Chitosan; Ionic conductivity; Methanol permeability; Alkaline direct methanol fuel cells; POLY(VINYL ALCOHOL) MEMBRANES; SOLID POLYMER ELECTROLYTE; ANION-EXCHANGE MEMBRANES; COMPOSITE; CHITOSAN; PROTON; PERFORMANCE; CONDUCTIVITY; TRANSPORT; PYRROLIDONE);
D O I
10.1016/j.memsci.2012.06.051
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
A novel polyvinyl alcohol/chitosan, PCS, blended membrane is prepared by direct blend process and solution casting method. In order to reduce the swelling ratio and enhance the chemical and thermal stabilities of the PCS, PCS membrane is crosslinked with glutaraldehyde to get PCS-G membrane. These membranes are characterized by differential scanning calorimetry, X-ray diffraction, thermogravimetry analysis and mechanical properties of tensile strength and elongation at breaking. The structures of these membranes are identified with azocarmine G. The various membranes are immersed in KOH(aq) solution to form polymer electrolyte membranes and then the alkaline uptake and swelling ratio in the thickness (SWL) and plane direction (SWA) in membranes are studied. The ionic conductivity and methanol permeability of the membranes are conducted. It is found that the value of methanol permeability through the membrane is lower than that of Nafion membrane. Compared to data of Nafion and other studies, PCS91-G membranes with higher selectivity suggest their potential applications in DMFC. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码:65 / 71
页数:7
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