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Improvement of the water resistance of atactic poly(vinyl alcohol) nanowebs by a heat treatment
- Improvement of the water resistance of atactic poly(vinyl alcohol) nanowebs by a heat treatment
- Lee, Sung Jun; Lee, Se Geun; Kim, Hoyoung; Lyoo, Won Seok
- DGIST Authors
- Lee, Sung Jun; Kim, Hoyoung
- Issue Date
- Journal of Applied Polymer Science, 106(5), 3430-3434
- Article Type
- A-PVA; Atactic Poly(Vinyl Alcohol) Nanowebs; Bead-and-String Morphology; Biological Properties; Crystallinity; Electrospinning; Fiber Diameter; Heat-Treated; Heat Treatment; Mechanical Properties; Morphology; Nano-Scale Materials; Nanofiber; Nanofibers; Nanoparticles; Polyvinyl Alcohol; Polyvinyl Alcohols; Solubility; Water Resistance; Web
- Nanoscale materials can be rationally designed to exhibit significantly changed physical, chemical, and biological properties because of the extremely small dimensions. Therefore, atactic poly(vinyl alcohol) (a-PVA) nanowebs by an electrospinning technique have very high water solubility because of their nanoscale in comparison with microscale materials such as fibers and films. In this study, a-PVA nanowebs were prepared via electrospinning under suitable conditions to form PVA webs with uniform nanofibers (fiber average diameter = 200 ± 50 ran), not a bead or bead-and-string morphology. Furthermore, to improve the water resistance of the water-soluble a-PVA nanowebs, the PVA nano-webs were heat-treated at various heat-treatment temperatures. The melting temperature of the heat-treated PVA nanowebs shifted toward a lower temperature with an increase in the heat-treatment temperature, and this indicated that micronetwork domains formed. Moreover, with the exception of a PVA nanoweb treated at an excessive heat-treatment temperature, the heat-treated PVA nanowebs showed higher crystalline and mechanical properties than a pure PVA nano-web. © 2007 Wiley Periodicals, Inc.
- Wiley Blackwell
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- Magnet-Controlled Materials Research Group1. Journal Articles
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