標題: Alignment-Improved and Diameter-Reduced Electrospun Polymer Fibers via the Hot-Stretching Process
作者: Hsu, Hsun-Hao
Chiu, Yu-Jing
Li, Jia-Wei
Tseng, Hsiao-Fan
Chang, Kai-Chieh
Chen, Jiun-Tai
交大名義發表
應用化學系
National Chiao Tung University
Department of Applied Chemistry
關鍵字: contact angles;diameter reduction;electrospinning;hot-stretching;orientation dispersion
公開日期: 1-Jan-1970
摘要: Electrospinning is one of the most facile and versatile techniques to prepare polymer fibers ranging from micrometers to nanometers. Although several parameters can be tuned to control the sizes and morphologies of electrospun fibers, many obstacles are still encountered as the target sizes of the fibers are getting smaller; for example, the sizes of the fibers can be effectively reduced by lowering the polymer solution concentrations but beaded or beads-on-string structures are usually formed. To overcome such obstacles, here a simple technique to prepare alignment-improved and diameter-reduced fibers without bead formation by hot-stretching electrospun fibers at temperatures higher than the glass transition temperatures of the polymers is developed. Polystyrene and poly(methyl methacrylate) are both used in this work as model materials. The relationship between the draw ratio and diameter of the fibers is quantitatively analyzed, demonstrating the control of the fiber diameters. Moreover, higher degrees of alignment improvement at the middle part of the fibers than those at the end part is observed, which results in lower water contact angles at the middle part of the fibers. This work provides a useful post-treatment technique to control the sizes and orientations of electrospun polymer fibers.
URI: http://dx.doi.org/10.1002/mame.201900637
http://hdl.handle.net/11536/153568
ISSN: 1438-7492
DOI: 10.1002/mame.201900637
期刊: MACROMOLECULAR MATERIALS AND ENGINEERING
起始頁: 0
結束頁: 0
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