Ultralight, Ultraflexible, Anisotropic, Highly Thermally Conductive Graphene Aerogel Films

Graphene aerogels have attracted much attention as a promising material for various applications. The unusually high intrinsic thermal conductivity of individual graphene sheets makes an obvious contrast with the thermal insulating performance of assembled 3D graphene materials. We report the prepar...

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Autores principales:	Zheng Liu, Qinsheng Wang, Linlin Hou, Yingjun Liu, Zheng Li
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	graphene aerogel film anisotropic material thermal conductivity Organic chemistry QD241-441
Acceso en línea:	https://doaj.org/article/9a8b0f883f3e43718a11c9eea789d090
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spelling	oai:doaj.org-article:9a8b0f883f3e43718a11c9eea789d0902021-11-25T18:27:57ZUltralight, Ultraflexible, Anisotropic, Highly Thermally Conductive Graphene Aerogel Films10.3390/molecules262268671420-3049https://doaj.org/article/9a8b0f883f3e43718a11c9eea789d0902021-11-01T00:00:00Zhttps://www.mdpi.com/1420-3049/26/22/6867https://doaj.org/toc/1420-3049Graphene aerogels have attracted much attention as a promising material for various applications. The unusually high intrinsic thermal conductivity of individual graphene sheets makes an obvious contrast with the thermal insulating performance of assembled 3D graphene materials. We report the preparation of anisotropy 3D graphene aerogel films (GAFs) made from tightly packed graphene films using a thermal expansion method. GAFs with different thicknesses and an ultimate low density of 4.19 mg cm<sup>−3</sup> were obtained. GAFs show high anisotropy on average cross-plane thermal conductivity (K<sub>⊥</sub>) and average in-plane thermal conductivity (K<sub>\|\|</sub>). Additionally, uniaxially compressed GAFs performed a large elongation of 11.76% due to the Z-shape folding of graphene layers. Our results reveal the ultralight, ultraflexible, highly thermally conductive, anisotropy GAFs, as well as the fundamental evolution of macroscopic assembled graphene materials at elevated temperature.Zheng LiuQinsheng WangLinlin HouYingjun LiuZheng LiMDPI AGarticlegraphene aerogel filmanisotropic materialthermal conductivityOrganic chemistryQD241-441ENMolecules, Vol 26, Iss 6867, p 6867 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	graphene aerogel film anisotropic material thermal conductivity Organic chemistry QD241-441
spellingShingle	graphene aerogel film anisotropic material thermal conductivity Organic chemistry QD241-441 Zheng Liu Qinsheng Wang Linlin Hou Yingjun Liu Zheng Li Ultralight, Ultraflexible, Anisotropic, Highly Thermally Conductive Graphene Aerogel Films
description	Graphene aerogels have attracted much attention as a promising material for various applications. The unusually high intrinsic thermal conductivity of individual graphene sheets makes an obvious contrast with the thermal insulating performance of assembled 3D graphene materials. We report the preparation of anisotropy 3D graphene aerogel films (GAFs) made from tightly packed graphene films using a thermal expansion method. GAFs with different thicknesses and an ultimate low density of 4.19 mg cm<sup>−3</sup> were obtained. GAFs show high anisotropy on average cross-plane thermal conductivity (K<sub>⊥</sub>) and average in-plane thermal conductivity (K<sub>\|\|</sub>). Additionally, uniaxially compressed GAFs performed a large elongation of 11.76% due to the Z-shape folding of graphene layers. Our results reveal the ultralight, ultraflexible, highly thermally conductive, anisotropy GAFs, as well as the fundamental evolution of macroscopic assembled graphene materials at elevated temperature.
format	article
author	Zheng Liu Qinsheng Wang Linlin Hou Yingjun Liu Zheng Li
author_facet	Zheng Liu Qinsheng Wang Linlin Hou Yingjun Liu Zheng Li
author_sort	Zheng Liu
title	Ultralight, Ultraflexible, Anisotropic, Highly Thermally Conductive Graphene Aerogel Films
title_short	Ultralight, Ultraflexible, Anisotropic, Highly Thermally Conductive Graphene Aerogel Films
title_full	Ultralight, Ultraflexible, Anisotropic, Highly Thermally Conductive Graphene Aerogel Films
title_fullStr	Ultralight, Ultraflexible, Anisotropic, Highly Thermally Conductive Graphene Aerogel Films
title_full_unstemmed	Ultralight, Ultraflexible, Anisotropic, Highly Thermally Conductive Graphene Aerogel Films
title_sort	ultralight, ultraflexible, anisotropic, highly thermally conductive graphene aerogel films
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/9a8b0f883f3e43718a11c9eea789d090
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Ultralight, Ultraflexible, Anisotropic, Highly Thermally Conductive Graphene Aerogel Films

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