Synthesis Cellulose Acetate Membranes for Water Treatment in the Coastal Region

Abstract

Indonesia especially Riau Province have several coastal areas. Availability of fresh water in coastal areas Riau very minimal so that the necessary technology that can process water at the coast into clean water. Suitable technology used is cellulose acetate membrane technology. In this research is made of cellulose acetate membranes using phase inversion technique by precipitation by immersion. Ethanol is used as a coagulant ( non - solvent ) with the composition of the casting solution consists of cellulose acetate 17 % w/w , acetone 56 % w/w , and formamide 56 % w/w . Advantages of cellulose acetate as the membrane material is hydrophilic and have durability resistance of fouling, especially protein and fat. Cellulose acetate membranes also possess high flux, a combination that is rare in other membrane materials. Cellulose acetate membranes are relatively easy to manufacture and raw materials are renewable resources. Selection of acetone because acetone capable of dissolving cellulose acetate. Cellulose acetate and formamide are not mutually dissolve (having different polarity characteristics) so it is necessary to dissolve the cellulose acetate phase using acetone. The purpose of the addition of formamide is additive to improve the properties of the membrane surface. With the additives may affect the morphology and structure of membrane performance. The third raw material is capable of producing a white sheet-shaped membrane. To maintain the quality of the cellulose acetate membrane, the membrane is kept in a solution of sodium azide 0.1%.