<![CDATA[Â Research the manufacture of composite membranes waste sulfonated polystyrene, vanillin chitosan, polyethylene glycol and natural zeolites have been carried out. This study aimed to determine the effect of sulfonation and the addition of natural zeolite on the value of cation exchange capacity, swelling degree, and thermal properties of the composite membrane. Polystyrene sulfonated polystyrene was made by sulfonation method that was isolated from sterofoam wrap food waste. Composite membranes made with the addition of natural zeolite and polyethylene glycol variation (w/w). Cation exchange capacity analysis results showed an increases in the value of the variation of the addition of natural zeolite and polyethylene glycol. Fourier Transform Infra Red analysis showed the entry of sulfonate groups on polystyrene characterized by the absorption at a wavelength of 1180.44 cm-1 indicating the presence of symmetric vibrations of functional groups S=O. Inclusion of vanillin in chitosan group characterized by vibrational C=N (imine) at wave number 1636.76 cm-1 and loss of C=O absorption peaks at wave numbers aldehyde group in vanillin at 1666.50 cm-1. All membranes variations have low homogenity. All variation on the thermal test showed that the more the composition of the zeolite or PEG increases the thermal resistance of the membrane. Membrane that has the potential to be applied to the fuel cell is the addition of zeolite membranes with 3% and 6% polyethylene glycol by cation exchange capacity of 0.957 meq/g, 28.75% Swelling Degree and thermal resistance to a temperature of 250oC.Keywords: Cation exchange capacity, chitosan vanilin, natural zeolite, polymer electolite membrane, sulfonated polystyrene]]>
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