Electrospun porous cellulose acetate fibers from volatile solvent mixture

Electrospun porous cellulose acetate (CA) fibers were produced from highly volatile binary solvent system; dichloromethane(DCM)/acetone. The morphology and porous structure of CA fibers were highly dependent on DCM/acetone ratio and the concentration of the solutions. Ribbon-like porous CA fibers were obtained from 5% (w/v) to 10% (w/v) polymer solutions depending on the DCM/acetone ratio; 1/1, 2/1, 3/1 and 9/1 (v/v). Using higher DCM/acetone ratio resulted in bead-free fibers from less concentrated polymer solutions due to the high viscosity of the solutions, in addition, more porous CA fibers were obtained owing to the high volatility of DCM.

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► Porous cellulose acetate (CA) fibers were electrospun from volatile solvent mixture.
► The morphology of the CA fibers was very much depending on the DCM/acetone ratio.
► Higher DCM/acetone ratio yielded more porous fibers due to high volatility of DCM.
► Higher DCM/acetone ratio yielded bead-free fibers from less concentrated solutions.