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E-Skin Development and Prototyping via Soft Tooling and Composites with Silicone Rubber and Carbon Nanotubes

The strategy of embedding conductive materials on polymeric matrices has produced functional and wearable artificial electronic skin prototypes capable of transduction signals, such as pressure, force, humidity, or temperature. However, these prototypes are expensive and cover small areas. This stud...

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Autores principales: García-Ávila, Josué, Rodríguez, Ciro A., Vargas-Martínez, Adriana, Ramírez-Cedillo, Erick, Martínez-López, J. Israel
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8746103/
https://www.ncbi.nlm.nih.gov/pubmed/35009402
http://dx.doi.org/10.3390/ma15010256
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author García-Ávila, Josué
Rodríguez, Ciro A.
Vargas-Martínez, Adriana
Ramírez-Cedillo, Erick
Martínez-López, J. Israel
author_facet García-Ávila, Josué
Rodríguez, Ciro A.
Vargas-Martínez, Adriana
Ramírez-Cedillo, Erick
Martínez-López, J. Israel
author_sort García-Ávila, Josué
collection PubMed
description The strategy of embedding conductive materials on polymeric matrices has produced functional and wearable artificial electronic skin prototypes capable of transduction signals, such as pressure, force, humidity, or temperature. However, these prototypes are expensive and cover small areas. This study proposes a more affordable manufacturing strategy for manufacturing conductive layers with 6 × 6 matrix micropatterns of RTV-2 silicone rubber and Single-Walled Carbon Nanotubes (SWCNT). A novel mold with two cavities and two different micropatterns was designed and tested as a proof-of-concept using Low-Force Stereolithography-based additive manufacturing (AM). The effect SWCNT concentrations (3 wt.%, 4 wt.%, and 5 wt.%) on the mechanical properties were characterized by quasi-static axial deformation tests, which allowed them to stretch up to ~160%. The elastomeric soft material’s hysteresis energy (Mullin’s effect) was fitted using the Ogden–Roxburgh model and the Nelder–Mead algorithm. The assessment showed that the resulting multilayer material exhibits high flexibility and high conductivity (surface resistivity ~7.97 × 10(4) Ω/sq) and that robust soft tooling can be used for other devices.
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spelling pubmed-87461032022-01-11 E-Skin Development and Prototyping via Soft Tooling and Composites with Silicone Rubber and Carbon Nanotubes García-Ávila, Josué Rodríguez, Ciro A. Vargas-Martínez, Adriana Ramírez-Cedillo, Erick Martínez-López, J. Israel Materials (Basel) Article The strategy of embedding conductive materials on polymeric matrices has produced functional and wearable artificial electronic skin prototypes capable of transduction signals, such as pressure, force, humidity, or temperature. However, these prototypes are expensive and cover small areas. This study proposes a more affordable manufacturing strategy for manufacturing conductive layers with 6 × 6 matrix micropatterns of RTV-2 silicone rubber and Single-Walled Carbon Nanotubes (SWCNT). A novel mold with two cavities and two different micropatterns was designed and tested as a proof-of-concept using Low-Force Stereolithography-based additive manufacturing (AM). The effect SWCNT concentrations (3 wt.%, 4 wt.%, and 5 wt.%) on the mechanical properties were characterized by quasi-static axial deformation tests, which allowed them to stretch up to ~160%. The elastomeric soft material’s hysteresis energy (Mullin’s effect) was fitted using the Ogden–Roxburgh model and the Nelder–Mead algorithm. The assessment showed that the resulting multilayer material exhibits high flexibility and high conductivity (surface resistivity ~7.97 × 10(4) Ω/sq) and that robust soft tooling can be used for other devices. MDPI 2021-12-30 /pmc/articles/PMC8746103/ /pubmed/35009402 http://dx.doi.org/10.3390/ma15010256 Text en © 2021 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
García-Ávila, Josué
Rodríguez, Ciro A.
Vargas-Martínez, Adriana
Ramírez-Cedillo, Erick
Martínez-López, J. Israel
E-Skin Development and Prototyping via Soft Tooling and Composites with Silicone Rubber and Carbon Nanotubes
title E-Skin Development and Prototyping via Soft Tooling and Composites with Silicone Rubber and Carbon Nanotubes
title_full E-Skin Development and Prototyping via Soft Tooling and Composites with Silicone Rubber and Carbon Nanotubes
title_fullStr E-Skin Development and Prototyping via Soft Tooling and Composites with Silicone Rubber and Carbon Nanotubes
title_full_unstemmed E-Skin Development and Prototyping via Soft Tooling and Composites with Silicone Rubber and Carbon Nanotubes
title_short E-Skin Development and Prototyping via Soft Tooling and Composites with Silicone Rubber and Carbon Nanotubes
title_sort e-skin development and prototyping via soft tooling and composites with silicone rubber and carbon nanotubes
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8746103/
https://www.ncbi.nlm.nih.gov/pubmed/35009402
http://dx.doi.org/10.3390/ma15010256
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