Electrospinning of ultrafine cellulose acetate fibers: Studies of a new solvent system and deacetylation of ultrafine cellulose acetate fibers |
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| Authors: | Won Keun Son Ji Ho Youk Taek Seung Lee Won Ho Park |
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| Institution: | 1. Research Institute of Advanced Materials, Chungnam National University, Daejeon 305-764, South Korea;2. Department of Textile Engineering, College of Engineering, Inha University, Incheon 402-751, South Korea;3. Department of Textile Engineering, College of Engineering, Chungnam National University, Daejeon 305-764, South Korea |
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| Abstract: | Electrospinning of cellulose acetate (CA) in a new solvent system and the deacetylation of the resulting ultrafine CA fibers were investigated. Ultrafine CA fibers (～2.3 μm) were successfully prepared via electrospinning of CA in a mixed solvent of acetone/water at water contents of 10–15 wt %, and more ultrafine CA fibers (0.46 μm) were produced under basic pH conditions. Ultrafine cellulose fibers were regenerated from the homogeneous deacetylation of ultrafine CA fibers in KOH/ethanol. It was very rapid and completed within 20 min. The crystal structure, thermal properties, and morphology of ultrafine CA fibers were changed according to the degree of deacetylation, finally to those of pure cellulose, but the nonwoven fibrous mat structure was maintained. The activation energy for the deacetylation of ultrafine CA fibers was 10.3 kcal/mol. © 2003 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 42: 5–11, 2004 |
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| Keywords: | electrospinning ultrafine fibers cellulose acetate deacetylation activation energy |
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