Seperation of Aqueous Ethanol Solution by Pervaporation using Uniplanar-Oriented Carboxymethyl Cellulose Membranes

Abstract

The separation of aqueous ethanol solution by pervaporation through uniplanar oriented cellulose acetate and cellulose membranes was investigated. For both of cellulose acetate and cellulose membranes, the permeation rates of uniplanar oriented membranes were considerably higher then those of unstretched membranes. On the contrary, the separation factors decreased with uniplanar orientation. Further, effect of uniplanar orientation on pervaporation was discussed in relation to molecular structure and affinity to ethanol and water of cellulose acetate and cellulose membranes