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Mechanically Enhanced Electrical Conductivity of Polydimethylsiloxane-Based Composites by a Hot Embossing Process

Electrically conductive polymer composites are in high demand for modern technologies, however, the intrinsic brittleness of conducting conjugated polymers and the moderate electrical conductivity of engineering polymer/carbon composites have highly constrained their applications. In this work, supe...

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Detalles Bibliográficos
Autores principales: Gao, Xiaolong, Huang, Yao, He, Xiaoxiang, Fan, Xiaojing, Liu, Ying, Xu, Hong, Wu, Daming, Wan, Chaoying
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6401989/
https://www.ncbi.nlm.nih.gov/pubmed/30960040
http://dx.doi.org/10.3390/polym11010056
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author Gao, Xiaolong
Huang, Yao
He, Xiaoxiang
Fan, Xiaojing
Liu, Ying
Xu, Hong
Wu, Daming
Wan, Chaoying
author_facet Gao, Xiaolong
Huang, Yao
He, Xiaoxiang
Fan, Xiaojing
Liu, Ying
Xu, Hong
Wu, Daming
Wan, Chaoying
author_sort Gao, Xiaolong
collection PubMed
description Electrically conductive polymer composites are in high demand for modern technologies, however, the intrinsic brittleness of conducting conjugated polymers and the moderate electrical conductivity of engineering polymer/carbon composites have highly constrained their applications. In this work, super high electrical conductive polymer composites were produced by a novel hot embossing design. The polydimethylsiloxane (PDMS) composites containing short carbon fiber (SCF) exhibited an electrical percolation threshold at 0.45 wt % and reached a saturated electrical conductivity of 49 S/m at 8 wt % of SCF. When reducing the sample thickness from 1.0 to 0.1 mm by the hot embossing process, a compression-induced percolation threshold occurred at 0.3 wt %, while the electrical conductivity was further enhanced to 378 S/m at 8 wt % SCF. Furthermore, the addition of a second nanofiller of 1 wt %, such as carbon nanotube or conducting carbon black, further increased the electrical conductivity of the PDMS/SCF (8 wt %) composites to 909 S/m and 657 S/m, respectively. The synergy of the densified conducting filler network by the mechanical compression and the hierarchical micro-/nano-scale filler approach has realized super high electrically conductive, yet mechanically flexible, polymer composites for modern flexible electronics applications.
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spelling pubmed-64019892019-04-02 Mechanically Enhanced Electrical Conductivity of Polydimethylsiloxane-Based Composites by a Hot Embossing Process Gao, Xiaolong Huang, Yao He, Xiaoxiang Fan, Xiaojing Liu, Ying Xu, Hong Wu, Daming Wan, Chaoying Polymers (Basel) Article Electrically conductive polymer composites are in high demand for modern technologies, however, the intrinsic brittleness of conducting conjugated polymers and the moderate electrical conductivity of engineering polymer/carbon composites have highly constrained their applications. In this work, super high electrical conductive polymer composites were produced by a novel hot embossing design. The polydimethylsiloxane (PDMS) composites containing short carbon fiber (SCF) exhibited an electrical percolation threshold at 0.45 wt % and reached a saturated electrical conductivity of 49 S/m at 8 wt % of SCF. When reducing the sample thickness from 1.0 to 0.1 mm by the hot embossing process, a compression-induced percolation threshold occurred at 0.3 wt %, while the electrical conductivity was further enhanced to 378 S/m at 8 wt % SCF. Furthermore, the addition of a second nanofiller of 1 wt %, such as carbon nanotube or conducting carbon black, further increased the electrical conductivity of the PDMS/SCF (8 wt %) composites to 909 S/m and 657 S/m, respectively. The synergy of the densified conducting filler network by the mechanical compression and the hierarchical micro-/nano-scale filler approach has realized super high electrically conductive, yet mechanically flexible, polymer composites for modern flexible electronics applications. MDPI 2019-01-02 /pmc/articles/PMC6401989/ /pubmed/30960040 http://dx.doi.org/10.3390/polym11010056 Text en © 2019 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Gao, Xiaolong
Huang, Yao
He, Xiaoxiang
Fan, Xiaojing
Liu, Ying
Xu, Hong
Wu, Daming
Wan, Chaoying
Mechanically Enhanced Electrical Conductivity of Polydimethylsiloxane-Based Composites by a Hot Embossing Process
title Mechanically Enhanced Electrical Conductivity of Polydimethylsiloxane-Based Composites by a Hot Embossing Process
title_full Mechanically Enhanced Electrical Conductivity of Polydimethylsiloxane-Based Composites by a Hot Embossing Process
title_fullStr Mechanically Enhanced Electrical Conductivity of Polydimethylsiloxane-Based Composites by a Hot Embossing Process
title_full_unstemmed Mechanically Enhanced Electrical Conductivity of Polydimethylsiloxane-Based Composites by a Hot Embossing Process
title_short Mechanically Enhanced Electrical Conductivity of Polydimethylsiloxane-Based Composites by a Hot Embossing Process
title_sort mechanically enhanced electrical conductivity of polydimethylsiloxane-based composites by a hot embossing process
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6401989/
https://www.ncbi.nlm.nih.gov/pubmed/30960040
http://dx.doi.org/10.3390/polym11010056
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