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Communication Dans Un Congrès Année : 2022

Healable ionoelastomer based on poly(ionic liquid)

Résumé

Ionoelastomers are elastomer based on poly(ionic liquid) (PIL) and have been introduced recently as liquid-free and stretchable ionic conductors. These ionically conducting materials find their applications in all-solid stretchable and wear-able electrochemical devices. In this presentation, we report a novel PIL based on imidazolium and bis(trifluoromethanesulfonyl)imide synthesized from commercially available copolymer rubber of polyepichlorohydrin and poly(ethyleneoxide). The PIL bearing allyl functional groups was then crosslinked with dynamic boronic ester crosslinkers through thiol-ene photoaddition. The resulting ionoelastomers are healable via vitrimer chemistry of boronic ester transester-ification. The effect of crosslinker and additional poly(ethylene glycol) based dangling chains acting as free volume enhanc-er has been studied on thermomechanical properties and ionic conductivities. At optimal conditions, the resulting ionoelas-tomer is soft with a Young modulus of 0.2MPa, stretchable up to 300% elongation, and exhibits an ionic conductivity of 1.6 X 10−5 S·cm−1 at 30 °C. In addition, the vitrimer properties of the material have been demonstrated with Arrhenius-type stress relaxation, healability, and recyclability. The recycled materials were able to retain their original mechanical and con-ductive properties. The reported material has allowed obtaining sustainable high-performance polymer materials with high ionic conductivity and by combing the facile processability of thermoplastics with the performance advantages of perma-nent crosslinked thermosets via vitrimer chemistry

Domaines

Chimie Polymères
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Dates et versions

hal-04400043 , version 1 (17-01-2024)

Identifiants

  • HAL Id : hal-04400043 , version 1

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Fengdi Li, Giao. T. M. Nguyen, Cédric Vancaeyzeele, Frederic Vidal, Cédric Plesse. Healable ionoelastomer based on poly(ionic liquid). Bordeaux Polymer Conference, Laboratoire de Chimie des Polymères Organiques, Jun 2022, Bordeaux, France. ⟨hal-04400043⟩
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