Ultrahigh concentration and stable dispersion of graphite nanosheet paste as composite nanofillers for thermal management and electromagnetic shielding

Abstract Graphene provides thermal and electrical conductivity to polymer composites, which significantly improves the properties of heat dissipation and electromagnetic interference (EMI) shielding. However, due to the low concentration and stability of graphene dispersion, its industrial applicati...

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Autores principales:	Liying Su, Jie Wang, Jiale Zhou, Jianfeng Wang, Chao Teng
Formato:	article
Lenguaje:	EN
Publicado:	Wiley-VCH 2021
Materias:	electromagnetic shielding GNS paste stable dispersion thermal management ultrahigh concentration Materials of engineering and construction. Mechanics of materials TA401-492
Acceso en línea:	https://doaj.org/article/89c4d71510b145a2b71066ef3fac51c1
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spelling	oai:doaj.org-article:89c4d71510b145a2b71066ef3fac51c12021-11-10T13:30:46ZUltrahigh concentration and stable dispersion of graphite nanosheet paste as composite nanofillers for thermal management and electromagnetic shielding2688-401110.1002/nano.202100007https://doaj.org/article/89c4d71510b145a2b71066ef3fac51c12021-11-01T00:00:00Zhttps://doi.org/10.1002/nano.202100007https://doaj.org/toc/2688-4011Abstract Graphene provides thermal and electrical conductivity to polymer composites, which significantly improves the properties of heat dissipation and electromagnetic interference (EMI) shielding. However, due to the low concentration and stability of graphene dispersion, its industrial application is greatly hindered. In this work, graphite nanosheet (GNS) paste was successfully fabricated from the expanded graphite through wet ball‐milling technology in a one pot process. The ultrahigh GNS concentration is up to 59.4 mg mL−1, and exhibits high stability for 6 months. Furthermore, the average thickness of GNS is less than 10 layers. The GNS paste could mix uniformly with polymer dispersion to obtain large‐area and flexible films by the doctor‐blading process. The composites containing 80 wt% GNS exhibit layered structure, leading to high thermal conductivities with an in‐plane value of 71.18 W m−1 K, far surpassing the pristine polymer material (0.19 W m−1 K), and reveal an efficient total electromagnetic shielding (SEtot≈ 45 dB in the range of 8.2 to 12.4 GHz). This work provides a direct route to prepare composites with high thermal conductivity and EMI shielding from ultrahigh concentration GNS paste.Liying SuJie WangJiale ZhouJianfeng WangChao TengWiley-VCHarticleelectromagnetic shieldingGNS pastestable dispersionthermal managementultrahigh concentrationMaterials of engineering and construction. Mechanics of materialsTA401-492ENNano Select, Vol 2, Iss 11, Pp 2159-2167 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	electromagnetic shielding GNS paste stable dispersion thermal management ultrahigh concentration Materials of engineering and construction. Mechanics of materials TA401-492
spellingShingle	electromagnetic shielding GNS paste stable dispersion thermal management ultrahigh concentration Materials of engineering and construction. Mechanics of materials TA401-492 Liying Su Jie Wang Jiale Zhou Jianfeng Wang Chao Teng Ultrahigh concentration and stable dispersion of graphite nanosheet paste as composite nanofillers for thermal management and electromagnetic shielding
description	Abstract Graphene provides thermal and electrical conductivity to polymer composites, which significantly improves the properties of heat dissipation and electromagnetic interference (EMI) shielding. However, due to the low concentration and stability of graphene dispersion, its industrial application is greatly hindered. In this work, graphite nanosheet (GNS) paste was successfully fabricated from the expanded graphite through wet ball‐milling technology in a one pot process. The ultrahigh GNS concentration is up to 59.4 mg mL−1, and exhibits high stability for 6 months. Furthermore, the average thickness of GNS is less than 10 layers. The GNS paste could mix uniformly with polymer dispersion to obtain large‐area and flexible films by the doctor‐blading process. The composites containing 80 wt% GNS exhibit layered structure, leading to high thermal conductivities with an in‐plane value of 71.18 W m−1 K, far surpassing the pristine polymer material (0.19 W m−1 K), and reveal an efficient total electromagnetic shielding (SEtot≈ 45 dB in the range of 8.2 to 12.4 GHz). This work provides a direct route to prepare composites with high thermal conductivity and EMI shielding from ultrahigh concentration GNS paste.
format	article
author	Liying Su Jie Wang Jiale Zhou Jianfeng Wang Chao Teng
author_facet	Liying Su Jie Wang Jiale Zhou Jianfeng Wang Chao Teng
author_sort	Liying Su
title	Ultrahigh concentration and stable dispersion of graphite nanosheet paste as composite nanofillers for thermal management and electromagnetic shielding
title_short	Ultrahigh concentration and stable dispersion of graphite nanosheet paste as composite nanofillers for thermal management and electromagnetic shielding
title_full	Ultrahigh concentration and stable dispersion of graphite nanosheet paste as composite nanofillers for thermal management and electromagnetic shielding
title_fullStr	Ultrahigh concentration and stable dispersion of graphite nanosheet paste as composite nanofillers for thermal management and electromagnetic shielding
title_full_unstemmed	Ultrahigh concentration and stable dispersion of graphite nanosheet paste as composite nanofillers for thermal management and electromagnetic shielding
title_sort	ultrahigh concentration and stable dispersion of graphite nanosheet paste as composite nanofillers for thermal management and electromagnetic shielding
publisher	Wiley-VCH
publishDate	2021
url	https://doaj.org/article/89c4d71510b145a2b71066ef3fac51c1
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Ultrahigh concentration and stable dispersion of graphite nanosheet paste as composite nanofillers for thermal management and electromagnetic shielding

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