EXPANDED POLYMERIC MEMBRANES

摘要

A method of manufacturing an expanded polymeric membrane comprising a glassy polymer having a glass transition temperature of at least 160°C and possessing two ortho-positronium (o-Ps) lifetimes is described. The polymeric membrane is treated by CO2 at temperatures between 25°C and 200°C and pressures between 2 and 40 MPa. Uses of the expanded polymeric membrane include pervaporation and nanofiltration.