Modelado de la estructura de membranas de Nafion utilizando dispersión a bajo ángulo de rayos-X

FERNÁNDEZ BORDÍN SANTIAGO P; OLIVEIRA, RAFAEL GUSTAVO; ANDRADA, H. E.; CARRERAS, A. C.; CASTELLANO, G. E.; GALVÁN JOSA, VICTOR M.

Tucumán

Congreso; 101 Reunion Anual de la Asociación Física Argentina; 2016

Asociación Física Argentina

The structure of Nafion 117 membranes was studied through SAXS experiments and 2D pattern simulations. Measurements were taken for different moisture conditions by synchrotron radiation, and for different temperatures through X-ray tube irradiation. The experimental profiles were fitted through simulations based on a new structural model including: the amorphous polymer matrix, polymer crystallites, and core-shell type channels conformed by water cylinders and sulfonic chains. The geometrical parameters intervening in the simulation of the SAXS patterns were optimized for each experimental condition. The proposed model allowed the proper description of the experimental SAXS profiles for the various moisture conditions studied.