Deakin University
Browse
razal-structureandpropertiesof-2020.pdf (6.63 MB)

Structure and properties of poly(Ethylene terephthalate) fiber webs prepared via laser-electrospinning and subsequent annealing processes

Download (6.63 MB)
Version 3 2024-06-19, 00:47
Version 2 2024-06-03, 23:25
Version 1 2021-01-05, 15:08
journal contribution
posted on 2024-06-19, 00:47 authored by T Tokuda, R Tsuruda, T Hara, H Kobayashi, K Tanaka, W Takarada, T Kikutani, JP Hinestroza, Joselito RazalJoselito Razal, M Takasaki
Melt-electrospinning is an eco-friendly method for producing ultra-fine fibers without using any solvent. We prepared webs of poly(ethylene terephthalate) (PET) through melt-electrospinning using CO2 laser irradiation for heating. The PET webs comprised ultra-fine fibers of uniform diameter (average fiber diameter = 1.66 μm, coefficient of variation = 19%). The co-existence of fibers with high and low molecular orientation was confirmed through birefringence measurements. Although the level of high orientation corresponded to that of commercial highly oriented yarn, crystalline diffraction was not observed in the wide-angle X-ray diffraction (WAXD) analysis of the webs. The crystallinity of the webs was estimated using differential scanning calorimetry (DSC). The fibers with higher birefringence did not exhibit any cold crystallization peak. After annealing the web at 116 °C for 5 min, a further increase in the birefringence of the fibers with higher orientation was observed. The WAXD results revealed that the annealed webs showed crystalline diffraction peaks with the orientation of the c-axis along the fiber axis. In summary, the formation of fibers with a unique non-crystalline structure with extremely high orientation was confirmed.

History

Journal

Materials

Volume

13

Article number

ARTN 5783

Pagination

1-12

Location

Switzerland

Open access

  • Yes

ISSN

1996-1944

eISSN

1996-1944

Language

English

Publication classification

C Journal article, C1 Refereed article in a scholarly journal

Issue

24

Publisher

MDPI