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―PVA/GLA/Al 2 O 3 ·3SiO 2 composite membranes were prepared through the reaction polyvinyl alcohol (PVA) with glutaraldehyde (GLA) as a cross-linking agent and subsequently adding aluminum silicate (Al 2 O 3 · 3SiO 2 ) as an inorganic material. The water uptake decreased as the GDL contents increased due to cross-linking process of PVA with GDL, and the ion conductivity increased as the Al 2 O 3 ·3SiO 2 contents increased in PVA/ GLA/Al 2 O 3 ·3SiO 2 composite membranes. The cross-linking structure of the polymers was confirmed using IR and the tendency of water uptake. The thermal analysis of the copolymers was carried out by TGA. TGA results showed that PVA/GLA composite membrane were more heat-resistant than PVA due to the cross-linking of PVA, and the heat stability of the composite membranes improved much more as the concentration of Al 2 O 3 · 3SiO 2 increased. Membranes prepared in this study seem to be have thermal stability and increase a tendency of the cation conductivity up to 60 ℃, but to be exhibit lower performance tendency at over 90 ℃. Therefore, it is necessary to do more aggressive effort to explore the possibility of application as an ion-conductive composite electrolyte.

Preparation and Characteristic Studies of Sulfonated Poly (vinyl alcohol) Composite Membranes Containing Aluminum Silicate for PEMFC