INIQUI   05448
INSTITUTO DE INVESTIGACIONES PARA LA INDUSTRIA QUIMICA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Sorción en membranas de mezcla de polímeros hidrofílicos
Autor/es:
BETINA VILLAGRA DI CARLO; MARIA ANTONIA TORO; HUGO ALBERTO DESTEFANIS
Lugar:
Salta
Reunión:
Jornada; X JORNADAS DE CIENCIA Y TECNOLOGÍA DE FACULTADES DE INGENIERÍA DEL NOA; 2015
Institución organizadora:
UNSA-Facultad de Ingenieria- Facultad deCiencias Naturales
Resumen:
ABSTRACT: Dense membranes were prepared using a hydrophilic polymeric mixture of poly(vinyl
alcohol) and poly(acrylic acid). The poly(vinyl alcohol) was chosen due to its hydrophilic character, good
chemical stability, high temperature resistance and easy processability, while the poly(acrylic acid) is
greatly hydrophilic. Then, thermal treatment of the membranes to promote crosslinking of the blend
polymer was undertaken. From infrared spectra with horizontal attenuated total reflectance (FTIR/
HATR), surface chemical composition of dense membranes and incorporated hydrophilic groups, were
analyzed. Crosslinked dense membranes were investigated with water- ethanol mixtures performing
sorption experiments at several temperatures (30, 40, 50 and 60°C). A sorption-diffusion mechanism
governs mass transfer through polymeric membrana, therefore thermodynamic aspects were analyzed, the
solubility parameters (Hildebrand) and solvent interaction parameters (Flory-Huggins) in the polymeric
mixture were estimated to evaluate the effect of water and ethanol in the polymeric matrix.
Palabras claves: polímeros, membranas mezcla, sorción
Keywords: polymers, blend membranes, sorption