CE06 - Polymères, composites, physique et chimie de la matière molle, procédés

Energy micro-GENEration with PIezoelectric biobased polymers – GENEPI

Submission summary

Piezoelectric materials represent strategic elements for sensors and energy harvesters with multiple applications, in particular with the emergence of self-powered IoT devices. However, new concepts are required to tackle economic and environmental issues regarding actual lead-based piezoelectric ceramics without compromising final performances. The GENEPI project consequently investigates the spontaneous shear piezoelectricity of poly(L-Lactide) (PLA) as an ideal alternative with many positive benefits. An industrially-relevant and solvent-free extrusion-orientation (MDO) fabrication process is currently under development at IMT Lille Douai to open a straightforward fabrication of PLA-based sensors / harvesters but several scientific challenges need to be overcome to get a full expertise on these technologies and enable faster developments. In this context, the first scientific objective of GENEPI project is to improve the knowledge on shear piezoelectric properties of PLA, in particular on process – structures – properties relationships and the use of (meth)acrylic block copolymers as blending partners to develop high-performance shear piezoelectric films at the laboratory scale. The second scientific objective of the GENEPI project is to convert the peculiar piezoelectricity of PLA into a conventional ferroelectric behavior in order to boost piezoelectric properties of PLA beyond the theoretical limit with electromechanical responses in practical mechanical modes for sensing / actuation / harvesting operations. This challenging task will explore several concepts (high-temperature ferroelectricity of PLA, pseudo-ferroelectricity of nanostructured PLA-based blends and electric field-assisted crystallization of PLA) to reveal long-term research strategies.

Project coordination

Cédric Samuel (Centre d'Enseignement de Recherche et d'Innovation Matériaux et Procédés)

The author of this summary is the project coordinator, who is responsible for the content of this summary. The ANR declines any responsibility as for its contents.

Partner

CERI MP Centre d'Enseignement de Recherche et d'Innovation Matériaux et Procédés

Help of the ANR 207,727 euros
Beginning and duration of the scientific project: - 48 Months

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