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Improvement of the water resistance of atactic poly(vinyl alcohol) nanowebs by a heat treatment

Title
Improvement of the water resistance of atactic poly(vinyl alcohol) nanowebs by a heat treatment
Authors
Lee, Seong JunLee, Se GeunKim, Ho YoungLyoo, Won Seok
DGIST Authors
Lee, Seong JunKim, Ho Young
Issue Date
2007-12
Citation
Journal of Applied Polymer Science, 106(5), 3430-3434
Type
Article
Article Type
Article
Keywords
A-PVAAtactic Poly(Vinyl Alcohol) NanowebsBead-and-String MorphologyBiological PropertiesCrystallinityElectrospinningFiber DiameterHeat-TreatedHeat TreatmentMechanical PropertiesMorphologyNano-Scale MaterialsNanofiberNanofibersNanoparticlesPolyvinyl AlcoholPolyvinyl AlcoholsSolubilityWater ResistanceWeb
ISSN
0021-8995
Abstract
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.
URI
http://hdl.handle.net/20.500.11750/5426
DOI
10.1002/app.26750
Publisher
Wiley Blackwell
Related Researcher
Files:
There are no files associated with this item.
Collection:
Magnet-Controlled Materials Research Group1. Journal Articles
ETC1. Journal Articles


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