Synergistic Effect of Aligned Graphene Nanosheets in Graphene Foam for High-Performance Thermally Conductive Composites
© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim..
Graphene shows a great potential for high-performance thermally conductive composite applications because of its extremely high thermal conductivity. However, the graphene-based polymer composites reported so far only have a limited thermal conductivity, with the highest thermal conductivity enhancement (TCE) per 1 vol% graphene less than 900%. Here, a continuous network of graphene foam (GF), filled with aligned graphene nanosheets (GNs), is shown to be an ideal filler structure for thermally conductive composite materials. Compared to previous reports, a clear thermal percolation is observed at a low graphene loading fraction. The GNs/GF/natural rubber composite shows the highest TCE of 8100% (6.2 vol% graphene loading) ever reported at room temperature, which gives a record-high TCE per 1 vol% graphene of 1300%. Further analyses reveal a significant synergistic effect between the aligned GNs and 3D interconnected GF, which plays a key role in the formation of a thermal percolation network to remarkably improve the thermal conductivity of the composites. Additionally, the use of this composite for efficient heat dissipation of light-emitting diode (LED) lamps is demonstrated. These findings provide valuable guidance to design high-performance graphene-based thermally conductive materials, and open up the possibility for the use of graphene in high-power electronic devices.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2019 |
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| Erschienen: |
2019 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:31 |
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| Enthalten in: |
Advanced materials (Deerfield Beach, Fla.) - 31(2019), 19 vom: 15. Mai, Seite e1900199 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Wu, Zhaohong [VerfasserIn] |
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| Links: |
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| Themen: |
Composites |
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| Anmerkungen: |
Date Revised 01.10.2020 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1002/adma.201900199 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM294798218 |
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| 520 | |a © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. | ||
| 520 | |a Graphene shows a great potential for high-performance thermally conductive composite applications because of its extremely high thermal conductivity. However, the graphene-based polymer composites reported so far only have a limited thermal conductivity, with the highest thermal conductivity enhancement (TCE) per 1 vol% graphene less than 900%. Here, a continuous network of graphene foam (GF), filled with aligned graphene nanosheets (GNs), is shown to be an ideal filler structure for thermally conductive composite materials. Compared to previous reports, a clear thermal percolation is observed at a low graphene loading fraction. The GNs/GF/natural rubber composite shows the highest TCE of 8100% (6.2 vol% graphene loading) ever reported at room temperature, which gives a record-high TCE per 1 vol% graphene of 1300%. Further analyses reveal a significant synergistic effect between the aligned GNs and 3D interconnected GF, which plays a key role in the formation of a thermal percolation network to remarkably improve the thermal conductivity of the composites. Additionally, the use of this composite for efficient heat dissipation of light-emitting diode (LED) lamps is demonstrated. These findings provide valuable guidance to design high-performance graphene-based thermally conductive materials, and open up the possibility for the use of graphene in high-power electronic devices | ||
| 650 | 4 | |a Journal Article | |
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| 650 | 4 | |a synergistic effect | |
| 650 | 4 | |a thermal conductivity | |
| 700 | 1 | |a Xu, Chuan |e verfasserin |4 aut | |
| 700 | 1 | |a Ma, Chaoqun |e verfasserin |4 aut | |
| 700 | 1 | |a Liu, Zhibo |e verfasserin |4 aut | |
| 700 | 1 | |a Cheng, Hui-Ming |e verfasserin |4 aut | |
| 700 | 1 | |a Ren, Wencai |e verfasserin |4 aut | |
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