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Preparation of Thermoplastic Polyurethane/Multi-Walled Carbon Nanotubes Composite Foam with High Resilience Performance via Fused Filament Fabrication and CO(2) Foaming Technique

Wearable flexible sensors with high sensitivity and wide detection range are applied in motion detection, medical diagnostic result and other fields, but poor resilience and hysteresis remain a challenge. In this study, a high-resilience foam sensor was prepared through a combination of additive man...

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Autores principales: Guo, Huijing, Thirunavukkarasu, Naveen, Mubarak, Suhail, Lin, Huang, Zhang, Chen, Li, Yonggui, Wu, Lixin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10054835/
https://www.ncbi.nlm.nih.gov/pubmed/36987314
http://dx.doi.org/10.3390/polym15061535
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author Guo, Huijing
Thirunavukkarasu, Naveen
Mubarak, Suhail
Lin, Huang
Zhang, Chen
Li, Yonggui
Wu, Lixin
author_facet Guo, Huijing
Thirunavukkarasu, Naveen
Mubarak, Suhail
Lin, Huang
Zhang, Chen
Li, Yonggui
Wu, Lixin
author_sort Guo, Huijing
collection PubMed
description Wearable flexible sensors with high sensitivity and wide detection range are applied in motion detection, medical diagnostic result and other fields, but poor resilience and hysteresis remain a challenge. In this study, a high-resilience foam sensor was prepared through a combination of additive manufacturing and green physical foaming method. The conductive filaments were prepared by using MWCNTs-modified TPU by the physical method of melt blending. Samples were prefabricated using the FFF printer and then saturated with CO(2) in an autoclave before being removed and heated to foam. The composite foam effectively reduced residual strain, demonstrating the high resilience of the 3D-printed composite materials with a foam porous structure. The residual strain of the sample before foaming was >6% after a single cycle, and then gradually increased. The residual strain of the foamed samples is less than 5%. In addition, composite foam has high sensitivity and can monitor subtle pressure changes (0~40 kPa). The sensing performance of the composite foam was evaluated, and the current signal remained stable under different loading rates and small compression strains (2~5%). By using this highly resilient conductive composite material, a hierarchical shoe insole was designed that successfully detected human walking and running movements.
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spelling pubmed-100548352023-03-30 Preparation of Thermoplastic Polyurethane/Multi-Walled Carbon Nanotubes Composite Foam with High Resilience Performance via Fused Filament Fabrication and CO(2) Foaming Technique Guo, Huijing Thirunavukkarasu, Naveen Mubarak, Suhail Lin, Huang Zhang, Chen Li, Yonggui Wu, Lixin Polymers (Basel) Article Wearable flexible sensors with high sensitivity and wide detection range are applied in motion detection, medical diagnostic result and other fields, but poor resilience and hysteresis remain a challenge. In this study, a high-resilience foam sensor was prepared through a combination of additive manufacturing and green physical foaming method. The conductive filaments were prepared by using MWCNTs-modified TPU by the physical method of melt blending. Samples were prefabricated using the FFF printer and then saturated with CO(2) in an autoclave before being removed and heated to foam. The composite foam effectively reduced residual strain, demonstrating the high resilience of the 3D-printed composite materials with a foam porous structure. The residual strain of the sample before foaming was >6% after a single cycle, and then gradually increased. The residual strain of the foamed samples is less than 5%. In addition, composite foam has high sensitivity and can monitor subtle pressure changes (0~40 kPa). The sensing performance of the composite foam was evaluated, and the current signal remained stable under different loading rates and small compression strains (2~5%). By using this highly resilient conductive composite material, a hierarchical shoe insole was designed that successfully detected human walking and running movements. MDPI 2023-03-20 /pmc/articles/PMC10054835/ /pubmed/36987314 http://dx.doi.org/10.3390/polym15061535 Text en © 2023 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
Guo, Huijing
Thirunavukkarasu, Naveen
Mubarak, Suhail
Lin, Huang
Zhang, Chen
Li, Yonggui
Wu, Lixin
Preparation of Thermoplastic Polyurethane/Multi-Walled Carbon Nanotubes Composite Foam with High Resilience Performance via Fused Filament Fabrication and CO(2) Foaming Technique
title Preparation of Thermoplastic Polyurethane/Multi-Walled Carbon Nanotubes Composite Foam with High Resilience Performance via Fused Filament Fabrication and CO(2) Foaming Technique
title_full Preparation of Thermoplastic Polyurethane/Multi-Walled Carbon Nanotubes Composite Foam with High Resilience Performance via Fused Filament Fabrication and CO(2) Foaming Technique
title_fullStr Preparation of Thermoplastic Polyurethane/Multi-Walled Carbon Nanotubes Composite Foam with High Resilience Performance via Fused Filament Fabrication and CO(2) Foaming Technique
title_full_unstemmed Preparation of Thermoplastic Polyurethane/Multi-Walled Carbon Nanotubes Composite Foam with High Resilience Performance via Fused Filament Fabrication and CO(2) Foaming Technique
title_short Preparation of Thermoplastic Polyurethane/Multi-Walled Carbon Nanotubes Composite Foam with High Resilience Performance via Fused Filament Fabrication and CO(2) Foaming Technique
title_sort preparation of thermoplastic polyurethane/multi-walled carbon nanotubes composite foam with high resilience performance via fused filament fabrication and co(2) foaming technique
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10054835/
https://www.ncbi.nlm.nih.gov/pubmed/36987314
http://dx.doi.org/10.3390/polym15061535
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