Conductivity of zeolite/poly(tetrafluoroethylene) composite membrane in the presence of water vapor

Abstract

The conductivities of zeolite/poly(tetrafluoroethylene) composite membranes were measured in the presence of water vapor at 75–150 °C. The conductivity of composite membranes depended on zeolite structure, zeolite content, and exchangeable cation in zeolite; the Li ion-exchanged Y-type zeolite/poly(tetrafluoroethylene) composite membrane with 80 wt.% of zeolite powder showed the highest conductivity among the composite membranes tested in the present study. It was found that the conductivity increased with an increase in the amount of water adsorbed on the composite membrane.