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Soft Stretchable Conductive Carboxymethylcellulose Hydrogels for Wearable Sensors

Hydrogels that have a capability to provide mechanical modulus matching between time-dynamic curvilinear tissues and bioelectronic devices have been considered tissue-interfacing ionic materials for stably sensing physiological signals and delivering feedback actuation in skin-inspired healthcare sy...

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Detalles Bibliográficos
Autores principales: Park, Kyuha, Choi, Heewon, Kang, Kyumin, Shin, Mikyung, Son, Donghee
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8871095/
https://www.ncbi.nlm.nih.gov/pubmed/35200473
http://dx.doi.org/10.3390/gels8020092
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author Park, Kyuha
Choi, Heewon
Kang, Kyumin
Shin, Mikyung
Son, Donghee
author_facet Park, Kyuha
Choi, Heewon
Kang, Kyumin
Shin, Mikyung
Son, Donghee
author_sort Park, Kyuha
collection PubMed
description Hydrogels that have a capability to provide mechanical modulus matching between time-dynamic curvilinear tissues and bioelectronic devices have been considered tissue-interfacing ionic materials for stably sensing physiological signals and delivering feedback actuation in skin-inspired healthcare systems. These functionalities are totally different from those of elastomers with low ionic conductivity and higher stiffness. Despite such remarkable progress, their low conductivity remains limited in transporting electrical charges to internal or external terminals without undesired information loss, potentially leading to an unstable biotic–abiotic interfaces in the wearable electronics. Here, we report a soft stretchable conductive hydrogel composite consisting of alginate, carboxymethyl cellulose, polyacrylamide, and silver flakes. This composite was fabricated via sol–gel transition. In particular, the phase stability and low dynamic modulus rates of the conductive hydrogel were confirmed through an oscillatory rheological characterization. In addition, our conductive hydrogel showed maximal tensile strain (≈400%), a low deformations of cyclic loading (over 100 times), low resistance (≈8.4 Ω), and a high gauge factor (≈241). These stable electrical and mechanical properties allowed our composite hydrogel to fully support the operation of a light-emitting diode demonstration under mechanical deformation. Based on such durable performance, we successfully measured the electromyogram signals without electrical malfunction even in various motions.
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spelling pubmed-88710952022-02-25 Soft Stretchable Conductive Carboxymethylcellulose Hydrogels for Wearable Sensors Park, Kyuha Choi, Heewon Kang, Kyumin Shin, Mikyung Son, Donghee Gels Article Hydrogels that have a capability to provide mechanical modulus matching between time-dynamic curvilinear tissues and bioelectronic devices have been considered tissue-interfacing ionic materials for stably sensing physiological signals and delivering feedback actuation in skin-inspired healthcare systems. These functionalities are totally different from those of elastomers with low ionic conductivity and higher stiffness. Despite such remarkable progress, their low conductivity remains limited in transporting electrical charges to internal or external terminals without undesired information loss, potentially leading to an unstable biotic–abiotic interfaces in the wearable electronics. Here, we report a soft stretchable conductive hydrogel composite consisting of alginate, carboxymethyl cellulose, polyacrylamide, and silver flakes. This composite was fabricated via sol–gel transition. In particular, the phase stability and low dynamic modulus rates of the conductive hydrogel were confirmed through an oscillatory rheological characterization. In addition, our conductive hydrogel showed maximal tensile strain (≈400%), a low deformations of cyclic loading (over 100 times), low resistance (≈8.4 Ω), and a high gauge factor (≈241). These stable electrical and mechanical properties allowed our composite hydrogel to fully support the operation of a light-emitting diode demonstration under mechanical deformation. Based on such durable performance, we successfully measured the electromyogram signals without electrical malfunction even in various motions. MDPI 2022-02-04 /pmc/articles/PMC8871095/ /pubmed/35200473 http://dx.doi.org/10.3390/gels8020092 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Park, Kyuha
Choi, Heewon
Kang, Kyumin
Shin, Mikyung
Son, Donghee
Soft Stretchable Conductive Carboxymethylcellulose Hydrogels for Wearable Sensors
title Soft Stretchable Conductive Carboxymethylcellulose Hydrogels for Wearable Sensors
title_full Soft Stretchable Conductive Carboxymethylcellulose Hydrogels for Wearable Sensors
title_fullStr Soft Stretchable Conductive Carboxymethylcellulose Hydrogels for Wearable Sensors
title_full_unstemmed Soft Stretchable Conductive Carboxymethylcellulose Hydrogels for Wearable Sensors
title_short Soft Stretchable Conductive Carboxymethylcellulose Hydrogels for Wearable Sensors
title_sort soft stretchable conductive carboxymethylcellulose hydrogels for wearable sensors
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8871095/
https://www.ncbi.nlm.nih.gov/pubmed/35200473
http://dx.doi.org/10.3390/gels8020092
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