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Piezoresistive, Surface Contact, Carbon-Polymer Composite Sensors / DAVID O'CONNOR

Swansea University Author: DAVID O'CONNOR

  • E-Thesis - restricted access under embargo until: 27th March 2028

DOI (Published version): 10.23889/SUthesis.63342

Abstract

Printed, thin-film, flexible, polymer composite force sensors afford the opportunity for spatial mapping with a small form factor on a flexible substrate. The piezoresistive responses of printed, dual-substrate, nano-carbon sensors were investigated up to 2 kN in compression with multiple configurat...

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Published: Swansea, Wales, UK 2023
Institution: Swansea University
Degree level: Doctoral
Degree name: EngD
Supervisor: Claypole, T. C.
URI: https://cronfa.swan.ac.uk/Record/cronfa63342
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first_indexed 2023-05-03T15:05:57Z
last_indexed 2023-05-03T15:05:57Z
id cronfa63342
recordtype RisThesis
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spelling v2 63342 2023-05-03 Piezoresistive, Surface Contact, Carbon-Polymer Composite Sensors 8179a6c5c80ce5c9654c8d5ed14d5876 DAVID O'CONNOR DAVID O'CONNOR true false 2023-05-03 Printed, thin-film, flexible, polymer composite force sensors afford the opportunity for spatial mapping with a small form factor on a flexible substrate. The piezoresistive responses of printed, dual-substrate, nano-carbon sensors were investigated up to 2 kN in compression with multiple configurations and materials. Clarification of the dominant piezoresistive mechanism and development of real world applicationswas sought after. The sensor topology and bulk materials revealed clustersof thin-film graphite platelets (⪅ 20μm) percolating within the bulk, and producingelectrically conductive asperities at the contact surface, which was confirmedby detailed chemical and morphological characterisation. The dominant piezoresistivemechanism was linked to the conductive surface contact area between thetwo substrates as the surfaces deformed, when subject to a compressive load. Thepiezoresistive response was altered by varying the conductive particle loading of theinks from 0 to 7% by volume fraction, along with a simplified surface contact modelpresented to predict the response. A new ink and methodology was developed tocoat carbon fibres, producing a flexible piezoresistive sensor fibre, for integrationinto a fibre reinforced composite panel. This new configuration takes advantage ofthe dual-substrate surface contact mechanic of the sensor architecture by allowingeach sensor fibre (one substrate of the dual-substrate architecture) to be woven intoa piece of cloth and then placed in contact to another similarly woven cloth withina typical fibre composite layup, to create an integrated sensor matrix at no additionalmanufacturing cost for the assembly of the composite panel. Fibre reinforcedpanels containing addressable integrated sensor networks embedded demonstratesthe ability to develop smart structural composites, and the opportunity to furtherdevelop wearable technology via a woven sensor fibre fabric. E-Thesis Swansea, Wales, UK Printed, sensors, carbon, thin-film 27 3 2023 2023-03-27 10.23889/SUthesis.63342 COLLEGE NANME COLLEGE CODE Swansea University Claypole, T. C. Doctoral EngD EPSRC COATED2 M2A 2023-09-28T15:13:49.2000816 2023-05-03T16:00:11.2063915 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering DAVID O'CONNOR 1 Under embargo Under embargo 2023-05-03T16:34:30.3146727 Output 19926061 application/pdf E-Thesis - restricted access true 2028-03-27T00:00:00.0000000 Copyright: The Author, David O'Connor, 2023. true eng
title Piezoresistive, Surface Contact, Carbon-Polymer Composite Sensors
spellingShingle Piezoresistive, Surface Contact, Carbon-Polymer Composite Sensors
DAVID O'CONNOR
title_short Piezoresistive, Surface Contact, Carbon-Polymer Composite Sensors
title_full Piezoresistive, Surface Contact, Carbon-Polymer Composite Sensors
title_fullStr Piezoresistive, Surface Contact, Carbon-Polymer Composite Sensors
title_full_unstemmed Piezoresistive, Surface Contact, Carbon-Polymer Composite Sensors
title_sort Piezoresistive, Surface Contact, Carbon-Polymer Composite Sensors
author_id_str_mv 8179a6c5c80ce5c9654c8d5ed14d5876
author_id_fullname_str_mv 8179a6c5c80ce5c9654c8d5ed14d5876_***_DAVID O'CONNOR
author DAVID O'CONNOR
author2 DAVID O'CONNOR
format E-Thesis
publishDate 2023
institution Swansea University
doi_str_mv 10.23889/SUthesis.63342
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering
document_store_str 0
active_str 0
description Printed, thin-film, flexible, polymer composite force sensors afford the opportunity for spatial mapping with a small form factor on a flexible substrate. The piezoresistive responses of printed, dual-substrate, nano-carbon sensors were investigated up to 2 kN in compression with multiple configurations and materials. Clarification of the dominant piezoresistive mechanism and development of real world applicationswas sought after. The sensor topology and bulk materials revealed clustersof thin-film graphite platelets (⪅ 20μm) percolating within the bulk, and producingelectrically conductive asperities at the contact surface, which was confirmedby detailed chemical and morphological characterisation. The dominant piezoresistivemechanism was linked to the conductive surface contact area between thetwo substrates as the surfaces deformed, when subject to a compressive load. Thepiezoresistive response was altered by varying the conductive particle loading of theinks from 0 to 7% by volume fraction, along with a simplified surface contact modelpresented to predict the response. A new ink and methodology was developed tocoat carbon fibres, producing a flexible piezoresistive sensor fibre, for integrationinto a fibre reinforced composite panel. This new configuration takes advantage ofthe dual-substrate surface contact mechanic of the sensor architecture by allowingeach sensor fibre (one substrate of the dual-substrate architecture) to be woven intoa piece of cloth and then placed in contact to another similarly woven cloth withina typical fibre composite layup, to create an integrated sensor matrix at no additionalmanufacturing cost for the assembly of the composite panel. Fibre reinforcedpanels containing addressable integrated sensor networks embedded demonstratesthe ability to develop smart structural composites, and the opportunity to furtherdevelop wearable technology via a woven sensor fibre fabric.
published_date 2023-03-27T15:13:50Z
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score 11.012678

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