Titre :

Evaluation of shear piezoelectric coefficients by a bimorph cantilever technique for extruded and oriented poly( l ‐lactide) films

Auteur(s) :

Ben Achour, Mohamed Aymen [Auteur]
Laboratoire de Matériaux Céramiques et de Mathématiques [CERAMATHS]
Samuel, Cédric [Auteur]
Ecole nationale supérieure Mines-Télécom Lille Douai [IMT Nord Europe]
Rguiti, Mohamed [Auteur]
Laboratoire de Matériaux Céramiques et de Mathématiques [CERAMATHS]
Barrau, Sophie [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Courtois, Christian [Auteur]
Laboratoire de Matériaux Céramiques et de Mathématiques [CERAMATHS]
Lacrampe, Marie‐France [Auteur]
Centre for Materials and Processes [CERI MP - IMT Nord Europe]

Titre de la revue :

Polymers for Advanced Technologies

Nom court de la revue :

Polymers for Advanced Techs

Numéro :

34

Pagination :

939-947

Éditeur :

Wiley

Date de publication :

2023

ISSN :

1042-7147

Discipline(s) HAL :

Chimie/Matériaux
Chimie/Polymères

Résumé en anglais : [en]

Uniaxially stretched poly(l-lactide) (US-PLA) films display shear piezoelectric properties of interests for smart applications. However, the measurement of these properties is quite challenging and a simple technique based ...
Lire la suite >Uniaxially stretched poly(l-lactide) (US-PLA) films display shear piezoelectric properties of interests for smart applications. However, the measurement of these properties is quite challenging and a simple technique based on bimorph cantilevers is here used. This technique is validated with commercial piezoelectric poly(vinylidene fluoride) (PVDF) films. A piezoelectric coefficient d31 close to 19 pm/V is then obtained with a precision close to 5% and a good accuracy to expected values. For US-PLA films made by extrusion—machine-direction orientation, shear piezoelectric coefficients d14 up to 5.9 pm/V are found. Relevant trends can be captured but a low precision on d14, close to 10%, is highlighted. This behavior is probably related to film thickness heterogeneities arising from the extrusion processing at the laboratory scale. Piezoelectric voltage coefficients (g14) and electromechanical coupling coefficients could be also easily obtained with additional measurements of the dielectric permittivity and mechanical compliance. Outstanding g14 coefficients up to 320 mV.m/N are confirmed for US-PLA films with a precision close to 20%. The bimorph cantilever technique consequently represents a simple and reliable technique to evaluate piezoelectric properties of soft materials, in particular shear piezoelectric properties of US-PLA films for future developments and optimizations at the pilot scale.Lire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Université de Lille
CNRS
INRAE
ENSCL

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Équipe(s) de recherche :

Ingénierie des Systèmes Polymères

Date de dépôt :

2023-03-24T08:31:15Z
2023-03-24T08:49:07Z
2023-03-24T09:07:39Z