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Flexoionic effect on ionic liquid based polymer composites for bending and pressure sensing applications

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Resumo:Due to their ionic composition, adaptability, and responsiveness to different stimuli, ionic liquids (ILs) are among the most suitable systems to develop smart stimuli-responsive materials, to be applied as sensors and actuators, in particular when incorporated into a polymer matrix, with improved processability and integration into devices. In the present work, films based on the IL 1-butyl-3-methylimidazolium tetrachloroferrate ([Bmim][FeCl4]) incorporated into a poly(vinylidene fluoride) (PVDF) matrix with different concentrations (5, 10, and 20 wt.%) are prepared by solvent casting. Samples are used for the fabrication by doctor blade and screen printing of a fully printed flexoelectric device suitable for bending and pressure monitoring. The highest sensing response is observed for the composites incorporating 20 wt.% IL content, leading to a bending angle and pressure sensitivity of 7.29 µV/° and 0.7 µV kPa−1, respectively. The technological potential of the developed materials and their flexoionic response, combined with their processability by printing techniques, has been demonstrated in a finger movement monitoring system, opening the possibility of application in areas including wearables and robotics.
Autores principais:Fernandes, Liliana Sofia Correia
Outros Autores:Pereira, Nelson Miguel Macedo Silva; Perinka, Nikola; Botelho, Gabriela; Correia, Daniela M.; Lanceros-Mendez, S.
Assunto:flexoionic ionic liquids printable electronics sensors flexoionic
Ano:2025
País:Portugal
Tipo de documento:artigo
Tipo de acesso:acesso restrito
Instituição associada:Universidade do Minho
Idioma:inglês
Origem:RepositóriUM - Universidade do Minho

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