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%.
