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Polymers 2016, 8(10), 376; doi:10.3390/polym8100376

Effect of Saponification Condition on the Morphology and Diameter of the Electrospun Poly(vinyl acetate) Nanofibers for the Fabrication of Poly(vinyl alcohol) Nanofiber Mats

1
Department of Bio-fibers and Materials Science, Kyungpook National University, Daegu 41566, Korea
2
Department of Textile Engineering & Technology, Yeungnam University, Gyeongsan 38541, Korea
*
Authors to whom correspondence should be addressed.
Academic Editor: Hsing-Lin Wang
Received: 8 September 2016 / Revised: 14 October 2016 / Accepted: 17 October 2016 / Published: 21 October 2016
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Abstract

Novel poly(vinyl alcohol) (PVA) nanofiber mats were prepared for the first time through heterogeneous saponification of electrospun poly(vinyl acetate) (PVAc) nanofibers. The effect of varying the saponification conditions, including temperature, time, and concentration of the alkaline solution, on the morphology of the saponified PVA fibers were evaluated by field-emission scanning electron microscopy. At 25 °C, the saponified PVA fibers exhibited a broad diameter distribution. The average fiber diameter, however, was found to decrease with increasing saponification temperature. When the saponification time was increased from 6 to 30 h, the average fiber diameter decreased gradually from 1540 to 1060 nm. In addition, the fiber diameter and morphology were also affected by the concentration of the alkaline saponification solution. The most optimal conditions for fabrication of thin, uniform, and smooth PVA nanofibers corresponded to an alkaline solution containing 10 g each of NaOH, Na2SO4, and methanol per 100 g of water, a temperature of 25 °C, and a saponification time of 24 h. View Full-Text
Keywords: electrospinning; heterogeneous saponification; poly(vinyl alcohol); poly(vinyl acetate); nanofiber mats electrospinning; heterogeneous saponification; poly(vinyl alcohol); poly(vinyl acetate); nanofiber mats
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Yang, S.B.; Kim, J.W.; Yeum, J.H. Effect of Saponification Condition on the Morphology and Diameter of the Electrospun Poly(vinyl acetate) Nanofibers for the Fabrication of Poly(vinyl alcohol) Nanofiber Mats. Polymers 2016, 8, 376.

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