Azzaz, Cherif M., Mattoso, Luiz H. C., Demarquette, Nicole R. et Zednik, Ricardo J..
2021.
« Polyvinylidene fluoride nanofibers obtained by electrospinning and blowspinning: Electrospinning enhances the piezoelectric β‐phase myth or reality? ».
Journal of Applied Polymer Science, vol. 138, nº 10.
Compte des citations dans Scopus : 10.
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Résumé
Considerable effort has been devoted to improving the properties of PVDF (polyvinylidene fluoride), arguably the most technologically important piezoelectric polymer. Electrospinning has been found to be a particularly effective method of producing PVDF nanofibers with superior piezoelectric properties due to the resulting exceptionally high fraction of the piezoelectrically active crystalline β‐phase. It is typically assumed that the high external electric fields applied during electrospinning enhance the formation of this β‐phase, with the confused literature offering various unsatisfactory mechanistic explanations. However, by comparing PVDF nanofibers produced by two different processes (electrospinning and blowspinning), we show that the electric field is entirely unnecessary; indeed, the crystallization dynamics are principally driven by the applied mechanical stress, as evidenced by structurally identical 200 nm diameter PVDF fibers produced with and without external electric fields.
| Type de document: | Article publié dans une revue, révisé par les pairs |
|---|---|
| Professeur: | Professeur Demarquette, Nicole R. Zednik, Ricardo |
| Affiliation: | Génie mécanique, Génie mécanique |
| Date de dépôt: | 12 nov. 2020 21:40 |
| Dernière modification: | 23 sept. 2021 04:00 |
| URI: | https://espace2.etsmtl.ca/id/eprint/21380 |
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