Siti Wafiroh, Tokok Adiarto, and Grandis Kanserastiwi
Department of Chemistry, Faculty of Science and Technology , Airlangga University
Jl. Mulyorejo, Surabaya 60115, Indonesia e-mail : wafiroh@unair.ac.id
Membrane technology has been expanded very fast because of having so much excellence in dissociation, condensation and purification. In this research there was a process which made cellulose diacetate membrane from kapok. The purposes of this research are to study the membrane material composition and the influence of coagulan temperature towards cellulose diacetate membrane performance. The membrane was synthesized by phase inversion method with variation of coagulan temperature, that are 2°C, 4°C,
6°C, and 8°C. Before the membrane was put in coagulation bath, the solvent which was used to synthesize of membrane was evaporated for 25 seconds. Membrane consists of cellulose diacetate from kapok with variation 11%, 12%, 13%, and 14%, formamide 8%, and acetone as solvent. Membrane was characterized by the thickness of membrane, flux and rejection, tensile strenght test (stress, strain, and Modulus Young), and analysis the morphology of optimum membrane showing optimum performance using SEM
(Scanning Electron Microscopy). Flux and rejection were measured by well water as feed. The composition of membrane showing optimal performance are cellulose diacetate 14%, formamide 8%, acetone 78% on 2°C coagulan temperature. The result of membrane characterization with optimum performance are 0,0658 mm to thickness of membrane, 16,1358 L.m
-2 .hours
-1 to flux value, 97,7642 % to rejection coefficient, 779,45 N/cm 2 to stress, 0,0124 to strain, and 62893,13 N/cm 2 to Modulus Young value.