Thermoplastic polyurethane flexible capacitive proximity sensor reinforced by CNTs for applications in the creative industries

Abstract Wearable sensing platforms have been rapidly advanced over recent years, thanks to numerous achievements in a variety of sensor fabrication techniques. However, the development of a flexible proximity sensor that can perform in a large range of object mobility remains a challenge. Here, a p...

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Autores principales:	Reza Moheimani, Nojan Aliahmad, Nahal Aliheidari, Mangilal Agarwal, Hamid Dalir
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/2679362fa4194edab7000863e8e31dfb
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spelling	oai:doaj.org-article:2679362fa4194edab7000863e8e31dfb2021-12-02T14:01:34ZThermoplastic polyurethane flexible capacitive proximity sensor reinforced by CNTs for applications in the creative industries10.1038/s41598-020-80071-02045-2322https://doaj.org/article/2679362fa4194edab7000863e8e31dfb2021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-80071-0https://doaj.org/toc/2045-2322Abstract Wearable sensing platforms have been rapidly advanced over recent years, thanks to numerous achievements in a variety of sensor fabrication techniques. However, the development of a flexible proximity sensor that can perform in a large range of object mobility remains a challenge. Here, a polymer-based sensor that utilizes a nanostructure composite as the sensing element has been presented for forthcoming usage in healthcare and automotive applications. Thermoplastic Polyurethane (TPU)/Carbon Nanotubes (CNTs) composites are capable of detecting presence of an external object in a wide range of distance. The proximity sensor exhibits an unprecedented detection distance of 120 mm with a resolution of 0.3%/mm. The architecture and manufacturing procedures of TPU/CNTs sensor are straightforward and performance of the proximity sensor shows robustness to reproducibility as well as excellent electrical and mechanical flexibility under different bending radii and over hundreds of bending cycles with variation of 4.7% and 4.2%, respectively. Tunneling and fringing effects are addressed as the sensing mechanism to explain significant capacitance changes. Percolation threshold analysis of different TPU/CNT contents indicated that nanocomposites having 2 wt% carbon nanotubes are exhibiting excellent sensing capabilities to achieve maximum detection accuracy and least noise among others. Fringing capacitance effect of the structure has been systematically analyzed by ANSYS Maxwell (Ansoft) simulation, as the experiments precisely supports the sensitivity trend in simulation. Our results introduce a new mainstream platform to realize an ultrasensitive perception of objects, presenting a promising prototype for application in wearable proximity sensors for motion analysis and artificial electronic skin.Reza MoheimaniNojan AliahmadNahal AliheidariMangilal AgarwalHamid DalirNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Reza Moheimani Nojan Aliahmad Nahal Aliheidari Mangilal Agarwal Hamid Dalir Thermoplastic polyurethane flexible capacitive proximity sensor reinforced by CNTs for applications in the creative industries
description	Abstract Wearable sensing platforms have been rapidly advanced over recent years, thanks to numerous achievements in a variety of sensor fabrication techniques. However, the development of a flexible proximity sensor that can perform in a large range of object mobility remains a challenge. Here, a polymer-based sensor that utilizes a nanostructure composite as the sensing element has been presented for forthcoming usage in healthcare and automotive applications. Thermoplastic Polyurethane (TPU)/Carbon Nanotubes (CNTs) composites are capable of detecting presence of an external object in a wide range of distance. The proximity sensor exhibits an unprecedented detection distance of 120 mm with a resolution of 0.3%/mm. The architecture and manufacturing procedures of TPU/CNTs sensor are straightforward and performance of the proximity sensor shows robustness to reproducibility as well as excellent electrical and mechanical flexibility under different bending radii and over hundreds of bending cycles with variation of 4.7% and 4.2%, respectively. Tunneling and fringing effects are addressed as the sensing mechanism to explain significant capacitance changes. Percolation threshold analysis of different TPU/CNT contents indicated that nanocomposites having 2 wt% carbon nanotubes are exhibiting excellent sensing capabilities to achieve maximum detection accuracy and least noise among others. Fringing capacitance effect of the structure has been systematically analyzed by ANSYS Maxwell (Ansoft) simulation, as the experiments precisely supports the sensitivity trend in simulation. Our results introduce a new mainstream platform to realize an ultrasensitive perception of objects, presenting a promising prototype for application in wearable proximity sensors for motion analysis and artificial electronic skin.
format	article
author	Reza Moheimani Nojan Aliahmad Nahal Aliheidari Mangilal Agarwal Hamid Dalir
author_facet	Reza Moheimani Nojan Aliahmad Nahal Aliheidari Mangilal Agarwal Hamid Dalir
author_sort	Reza Moheimani
title	Thermoplastic polyurethane flexible capacitive proximity sensor reinforced by CNTs for applications in the creative industries
title_short	Thermoplastic polyurethane flexible capacitive proximity sensor reinforced by CNTs for applications in the creative industries
title_full	Thermoplastic polyurethane flexible capacitive proximity sensor reinforced by CNTs for applications in the creative industries
title_fullStr	Thermoplastic polyurethane flexible capacitive proximity sensor reinforced by CNTs for applications in the creative industries
title_full_unstemmed	Thermoplastic polyurethane flexible capacitive proximity sensor reinforced by CNTs for applications in the creative industries
title_sort	thermoplastic polyurethane flexible capacitive proximity sensor reinforced by cnts for applications in the creative industries
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/2679362fa4194edab7000863e8e31dfb
work_keys_str_mv	AT rezamoheimani thermoplasticpolyurethaneflexiblecapacitiveproximitysensorreinforcedbycntsforapplicationsinthecreativeindustries AT nojanaliahmad thermoplasticpolyurethaneflexiblecapacitiveproximitysensorreinforcedbycntsforapplicationsinthecreativeindustries AT nahalaliheidari thermoplasticpolyurethaneflexiblecapacitiveproximitysensorreinforcedbycntsforapplicationsinthecreativeindustries AT mangilalagarwal thermoplasticpolyurethaneflexiblecapacitiveproximitysensorreinforcedbycntsforapplicationsinthecreativeindustries AT hamiddalir thermoplasticpolyurethaneflexiblecapacitiveproximitysensorreinforcedbycntsforapplicationsinthecreativeindustries
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Thermoplastic polyurethane flexible capacitive proximity sensor reinforced by CNTs for applications in the creative industries

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