Efeitos da incorporação de peneiras moleculares 3A, 4A, 5A e 13X em membranas compósitas de quitosana/poli(vinil álcool)

Abstract

Recebido em 1/12/08; aceito em 24/7/09; publicado na web em 11/1/10 EFFECT OF MOLECULAR SIEVES 3A, 4A, 5A AND 13X INCORPORATION ON THE CHITOSAN/POLY(VINYL ALCOHOL) COMPOSITES MEMBRANES. The composite membranes prepared via incorporation of 12.5% of molecular sieves 3A, 4A, 5A and 13X into chitosan/poly(vinyl alcohol) (1:1). The composite membranes were immersed in the cross-linker sulfuric acid in order to acquire high proton conductivity for applications in electrolytes in PEMCF and DMF. The influence of the molecular sieves on the structural, optical, thermal, mechanical, morphologic and protonic conductivity properties and water/methanol swelling degree of membranes were investigated.