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Article Dans Une Revue Smart Materials and Structures Année : 2018

3D interlock design 100% PVDF piezoelectric to improve energy harvesting

Résumé

Piezoelectric textile structures based on 100% poly(vinylidene fluoride) (PVDF) were developed and characterised. Multifilaments of 246 tex were produced by melt spinning. The mechanical stretching during the process provides PVDF fibres with a piezoelectric β-phase of up to 97% has been measured by FTIR experiments. Several studies have been carried out on piezoelectric PVDF-based flexible structures (films or textiles), the aim of the study being the investigation of the differences between 2D and 3D woven fabrics from 100% optimised (by optimising piezoelectric crystalline phase) piezoelectric PVDF multifilament yarns. The textile structures were poled after the weaving process, and a maximum output voltage of 2.3 V was observed on 3D woven under compression by DMA tests. Energy harvesting is optimised in a 3D interlock thanks to the stresses of the multifilaments in the thickness. The addition of a resistor makes it possible to measure energy of 10.5 μJ.m−2 during 10 cycles of stress in compression of 5 s each.
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Dates et versions

hal-04502180 , version 1 (13-03-2024)

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Anaëlle Talbourdet, François Rault, Guillaume Lemort, Cédric Cochrane, Eric Devaux, et al.. 3D interlock design 100% PVDF piezoelectric to improve energy harvesting. Smart Materials and Structures, 2018, Smart Materials and Structures, 27, ⟨10.1088/1361-665X/aab865⟩. ⟨hal-04502180⟩

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