Effect of gelatin on water flux and hydrophilicity of cellulose acetate membranes

فاقد چكيده فارسي

In this study, cellulose acetate membranes were prepared by phase inversion immersion precipitation method. Various solutions with constant concentration of polymer (17.5%) were formulated. Gelatin as an additive in three levels was used to change the hydrophilicity and consequently water flux of the membranes. In this research, acetic acid was applied as a common solvent for the polymer and its additive. Also, distilled water with temperature of 24˚C was utilized as nonsolvent. These made the membrane completely environmentally friendly. Solutions were cast on a glass plate by a film applicator with thickness of 200 μm. Finally, performance of membranes were evaluated by contact angle and permeation tests. The permeability of the samples was measured for 2 hours under the conditions of protein separation from the aqueous solution and the effect of gelatin as a hydrophilic additive was investigated. The results indicate that water flux and hydrophilicity of the samples rise with increasing in dosage of gelatin.