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Volume 15
Issue 6
10.3390/ma15062209
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Article

Planar or Biaxial Stretching of Poly(ethylene terephthalate) Fiber Webs Prepared by Laser-Electrospinning

by
Tomoki Tokuda
1,
Ryo Tsuruda
1,
Takuya Hara
1,
Zongzi Hou
1,
Haruki Kobayashi
1,
Katsufumi Tanaka
1,
Wataru Takarada
2,
Takeshi Kikutani
3,4,
Juan P. Hinestroza
5,
Joselito M. Razal
6 and
Midori Takasaki
1,4,*
1
Faculty of Materials Science and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
2
Department of Materials Science and Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
3
School of Materials and Chemical Technology, Tokyo Institute of Technology, 4259-J3-142, Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan
4
Center for Fiber and Textile Science, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
5
Department of Fiber Science and Apparel Design, Cornell University, 135 Human Ecology Building, Ithaca, NY 14850, USA
6
Institute for Frontier Materials, Deakin University, Geelong, VIC 3216, Australia
*
Author to whom correspondence should be addressed.
Materials 2022, 15(6), 2209; https://doi.org/10.3390/ma15062209
Submission received: 8 February 2022 / Revised: 10 March 2022 / Accepted: 12 March 2022 / Published: 17 March 2022
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Abstract

In this work, laser-heated electrospinning (LES) process using carbon dioxide laser was explored as an eco-friendly method for producing ultrafine fibers. To enhance the thinning of fibers and the formation of fiber structure, planar or equibiaxial stretching and subsequent annealing processes were applied to poly(ethylene terephthalate) (PET) fiber webs prepared by LES. The structure and properties of the obtained webs were investigated. Ultrafine fiber webs with an average diameter of approximately 1 μm and a coefficient of variation of 20–25% were obtained when the stretch ratios in the MD (machine direction) × TD (transverse direction) were 3 × 1 and 3 × 3 for the planar and equibiaxial stretching, respectively. In the wide-angle X-ray diffraction analysis of the web samples, preferential orientation of crystalline c-axis were confirmed along the MD for planar stretching and only along the web plane for equibiaxial stretching, which was in contrast to the stretching of film samples, where additional preferential orientation of benzene ring along the film plane proceeded. The results obtained suggest that PET fiber webs fabricated through LES and subsequent planar or biaxial stretching processes have potential for a wide variety of applications, such as packaging and battery separator materials.
Keywords: poly(ethylene terephthalate); melt electrospinning; ultrafine fibers; birefringence; crystallinity; planar stretching; biaxial stretching poly(ethylene terephthalate); melt electrospinning; ultrafine fibers; birefringence; crystallinity; planar stretching; biaxial stretching

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MDPI and ACS Style

Tokuda, T.; Tsuruda, R.; Hara, T.; Hou, Z.; Kobayashi, H.; Tanaka, K.; Takarada, W.; Kikutani, T.; Hinestroza, J.P.; Razal, J.M.; et al. Planar or Biaxial Stretching of Poly(ethylene terephthalate) Fiber Webs Prepared by Laser-Electrospinning. Materials 2022, 15, 2209. https://doi.org/10.3390/ma15062209

AMA Style

Tokuda T, Tsuruda R, Hara T, Hou Z, Kobayashi H, Tanaka K, Takarada W, Kikutani T, Hinestroza JP, Razal JM, et al. Planar or Biaxial Stretching of Poly(ethylene terephthalate) Fiber Webs Prepared by Laser-Electrospinning. Materials. 2022; 15(6):2209. https://doi.org/10.3390/ma15062209

Chicago/Turabian Style

Tokuda, Tomoki, Ryo Tsuruda, Takuya Hara, Zongzi Hou, Haruki Kobayashi, Katsufumi Tanaka, Wataru Takarada, Takeshi Kikutani, Juan P. Hinestroza, Joselito M. Razal, and et al. 2022. "Planar or Biaxial Stretching of Poly(ethylene terephthalate) Fiber Webs Prepared by Laser-Electrospinning" Materials 15, no. 6: 2209. https://doi.org/10.3390/ma15062209

APA Style

Tokuda, T., Tsuruda, R., Hara, T., Hou, Z., Kobayashi, H., Tanaka, K., Takarada, W., Kikutani, T., Hinestroza, J. P., Razal, J. M., & Takasaki, M. (2022). Planar or Biaxial Stretching of Poly(ethylene terephthalate) Fiber Webs Prepared by Laser-Electrospinning. Materials, 15(6), 2209. https://doi.org/10.3390/ma15062209

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