Environmentally Friendlier Printable Conductive and Piezoresistive Sensing Materials Compatible with Conformable Electronics

Franco, Miguel; Motealleh, Azadeh; Costa, Carlos M.; Perinka, Nikola; Ribeiro, Clarisse; Tubio, Carmen R.; Carabineiro, Sónia Alexandra Correia; Costa, Pedro; Lanceros-Méndez, Senentxu

http://hdl.handle.net/10362/159278

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Autores

Carabineiro, Sónia Alexandra Correia

Costa, Pedro

Lanceros-Méndez, Senentxu

Resumo(s)

Flexible and conformable conductive composites have been developed using different polymers, including water-based polyvinylpyrrolidone (PVP), chemical-resistant polyvinylidene fluoride (PVDF), and elastomeric styrene-ethylene-butylene-styrene (SEBS) reinforced with nitrogen-doped reduced graphene oxide with suitable viscosity in composites for printable solutions with functional properties. Manufactured by screen-printing using low-toxicity solvents, leading to more environmentally friendly conductive materials, the materials present an enormous step toward functional devices. The materials were enhanced in terms of filler/binder ratio, achieving screen-printed films with a sheet resistance lower than Rsq < 100 Ω/sq. The materials are biocompatible and support bending deformations up to 10 mm with piezoresistive performance for the different polymers up to 100 bending cycles. The piezoresistive performance of the SEBS binder is greater than double that the other composites, with a gauge factor near 4. Thermoforming was applied to all materials, with the PVP-based ones showing the lowest electrical resistance after the bending process. These conductive materials open a path for developing sustainable and functional devices for printable and conformable electronics.

Descrição

This work was supported by the Portuguese Foundation for Science and Technology (FCT): projects UID/FIS/04650/2021, and Stimulus of Scientific Employments 2020.04028.CEECIND (C.M.C.), 2020.04163.CEECIND (C.R.) and CEECINST/00102/2018 Institutional Call (S.A.C.C.). This study forms part of the Advanced Materials program and was supported by MCIN with funding from European Union NextGenerationEU (PRTR-C17.I1) and by the Basque Government under the IKUR program. Funding from the Basque Government Industry Department under the ELKARTEK program is also acknowledged. The authors thank CEMUP for the assistance with XPS analyses. Publisher Copyright: © 2023 The Authors. Published by American Chemical Society.

Palavras-chave

conductive materials conformable electronics doped graphene functional composites green processing Process Chemistry and Technology Polymers and Plastics Organic Chemistry