Existence d'un paradoxe de Schroeder avec la membrane Nation? Etude par diffusion de rayons X aux petits angles

摘要

Water uptake of perfluorinated ionomer membranes (Nafion) is studied by small angles X-rays scattering (SAXS). The purpose is to determine if these membranes are subjected to the Schroeder paradox. This paradox is defined as a difference of eater uptake for a membrane immersed in water or balanced in presence of a statured vapor pressure. Results from SAXS measurements indicate that the appearance of the paradox is dependent on the pretraitement of the membrane because of its water uptake memory.