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Forward osmosis technology is promising molecular separation processes employing osmotic pressure difference of two phases separated by a membrane. Membrane for forward osmosis application has a semipermeable property which selectively passes the certain molecules while reject others. Cellulose triacetate and cellulose acetate are common polymers that are often used in the fabrication of forward osmosis membranes. However, the solvent used in the fabrication of forward osmosis membrane is a toxic organic solvent. CyreneTM (C6H8O3) is a solvent derived from cellulose and is an environmentally friendly solvent because it does not leave sulfur and nitrogen emissions. This work is investigating the fabrication of forward osmosis membranes based on cellulose triacetate and cellulose acetate via phase inversion method, by using Cyrene as solvent. Various composition of the polymers and the green solvent were evaluated. The properties of forward osmosis membranes were characterized by its morphology by scanning electron microscopy and its performance based on water flux and reverse solute flux.

Fabrication of Cellulose Acetate Membrane using Cyrene as Green Solvent