Estudio del transporte de masa a través de membranas compuestas

BETINA VILLAGRA DI CARLO; LÓPEZ MUÑOZ MERCEDES; ELZA CASTRO VIDAURRE

SALTA

Jornada; X JORNADAS DE CIENCIA Y TECNOLOGÍA DE FACULTADES DE INGENIERÍA DEL NOA; 2015

UNSA-Facultad de Ingenieria- Facultad de Ciencias Naturales

ABSTRACT: Composite membranes were prepared, a polyethersulfone (PES) support porous membrane was synthesized by the phase inversion technique; then a plasma pre-treatment of the substrate surface using argon was followed by activated support coating with a layer of hydrophilic polymeric mixture of poly(vinyl alcohol) [PVA, 75wt%] and poly(acrylic acid) [PAA, 25wt%]. Finally, thermal treatment of the composite membranes to promote crosslinking of the coated polymer was undertaken. From infrared spectra with horizontal attenuated total reflectance (FT-IR/HATR), surface chemical composition of composite membrane was analyzed. Composite membranes were investigated with water- ethanol (20/80wt %) mixtures performing pervaporation (PV) experiments at several temperatures (30, 40, 50 and 60°C). Driving forces for mass transport across the composite membrane were estimated by the fugacity difference between the bulk feed and the permeate. Fluxes, selectivity (awater/Ethanol) and permeation activation energy (EJi) are reported. activation energy (EJi) are reported. awater/Ethanol) and permeation activation energy (EJi) are reported.Ji) are reported. Palabras claves: polímeros, membranas compuestas, pervaporación Keywords: polymers, composite membranes, pervaporatioN