INFLUENCE OF PREPARATION CONDITIONS OF COMPOSITE ULTRAFILTRATION MEMBRANE

Abstract

    Composite membrane has been fabricated from cellulose nitrate using cellulose or polyeste as a supporting material. The sublayer of membrane is made of cellulose nitrate and the toplayer is formed from cellulose nitrate. Influence of preparation conditions on characteristics of each layer has been investigated in terms of casting characteristics of material, membrane thickness, solution composition and evaporation time of solvent. The optimum conditions for each layer have been chosen for preparation of composite membrane, which could have a good separation property in both flux of filtrate and rejection for yeast in beer solution after fermentation process