Huang & Thomas Europol 2018 Final Manuscript.pdf (3.25 MB)

Fabricating porous poly(lactic acid) fibres via electrospinning

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journal contribution
posted on 19.03.2018, 10:00 by Chao Huang, Noreen Thomas
© 2018 Elsevier Ltd In this paper, amorphous poly(lactic acid) (PLA), a biodegradable polymer with excellent bio-compatibility, is successfully electrospun into micron-sized fibres with controlled surface and internal morphologies. By careful solvent selection, either surface porosity or internal porosity can be achieved through different mechanisms. Use of chloroform as the solvent gives rise to circular pores of 100 nm diameter confined to the surface. These are obtained in humid conditions by the so-called ‘Breath Figure’ mechanism. It is found that combining chloroform with a water-miscible non-solvent yields either surface porosity (wrinkled effect) using a low boiling point liquid, e.g. ethanol, or internal porosity using a high boiling point liquid, e.g. dimethyl sulphoxide (DMSO). Both these microstructures are obtained through a non-solvent induced phase separation (NIPS) mechanism. Finally, it is found possible to produce both surface and internal porosity using DMSO by a vapour induced phase separation (VIPS) mechanism. The porous electrospun PLA mats were shown to exhibit significantly increased oil absorption capacity compared with the non-porous fibre mats.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Materials

Published in

European Polymer Journal

Volume

99

Pages

464 - 476

Citation

HUANG, C. and THOMAS, N.L., 2018. Fabricating porous poly(lactic acid) fibres via electrospinning. European Polymer Journal, 99, pp. 464-476.

Publisher

© Elsevier

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

20/12/2017

Publication date

2018

Notes

This paper was accepted for publication in the journal European Polymer Journal and the definitive published version is available at https://doi.org/10.1016/j.eurpolymj.2017.12.025

ISSN

0014-3057

Language

en

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