Preparation and properties of thermally conductive grapheme nanoplates/(polyetherketone cardo-epoxy) composites with double percolation structures

OUYANG Zeyu; WANG Keke; RAO Qiong; ZHANG Zhilong; FU Bibo; PENG Xiongqi

doi:10.13801/j.cnki.fhclxb.20200806.003

Volume 38 Issue 3

Mar. 2021

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OUYANG Zeyu, WANG Keke, RAO Qiong, et al. Preparation and properties of thermally conductive grapheme nanoplates/(polyetherketone cardo-epoxy) composites with double percolation structures[J]. Acta Materiae Compositae Sinica, 2021, 38(3): 722-731. doi: 10.13801/j.cnki.fhclxb.20200806.003

Citation:

OUYANG Zeyu, WANG Keke, RAO Qiong, et al. Preparation and properties of thermally conductive grapheme nanoplates/(polyetherketone cardo-epoxy) composites with double percolation structures[J]. Acta Materiae Compositae Sinica, 2021, 38(3): 722-731. doi: 10.13801/j.cnki.fhclxb.20200806.003

Citation:

OUYANG Zeyu, WANG Keke, RAO Qiong, et al. Preparation and properties of thermally conductive grapheme nanoplates/(polyetherketone cardo-epoxy) composites with double percolation structures[J]. Acta Materiae Compositae Sinica, 2021, 38(3): 722-731. doi: 10.13801/j.cnki.fhclxb.20200806.003

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Preparation and properties of thermally conductive grapheme nanoplates/(polyetherketone cardo-epoxy) composites with double percolation structures

doi: 10.13801/j.cnki.fhclxb.20200806.003

OUYANG Zeyu^1
,,
WANG Keke^1
,,
RAO Qiong^1
,,
ZHANG Zhilong^2
,,
FU Bibo^2
,,
PENG Xiongqi^{1
,
,}

1.
School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
2.
AECC Hunan Aviation Powerplant Research Institute, Zhuzhou 412002, China

Received Date: 2020-05-25
Accepted Date: 2020-07-14

Available Online: 2020-08-06

Publish Date: 2021-03-15

Abstract

Abstract

To improve the thermal conductivity of epoxy (EP) with a lower thermally conductive filler content, graphene nanoplates/(polyetherketone cardo-EP) (GNP/(PEK-C-EP)) composites were prepared by the solution method. The selective distribution of GNP was predicted by calculation based on contact angle measurements, and the effects of GNP and PEK-C contents on the microstructures and thermal conductivities of GNP/(PEK-C-EP) composites were investigated by SEM and laser flash method. The results show that double percolation structures are formed in GNP/(PEK-C-EP) composites as the content of PEK-C reaches 20wt%, where GNPs are selectively distributed in PEK-C to build continuous heat conduction paths. For GNP/EP composites, it reaches the highest thermal conductivity of 0.375 W(m·K)⁻¹ at 1wt% GNP. While for GNP/(PEK-C-EP) composites, the content of 0.5wt% GNP reaches highest thermal conductivity of 0.371 W(m·K)⁻¹, which is 48% higher than that of GNP/EP composites at 0.5wt% GNP content and basically the same as that of GNP/EP composites at 1wt% GNP. It indicates that the filler content of GNP/(PEK-C-EP) composites is reduced by 50% owing to the double percolation effect. In addition, the glass transition temperatures, thermal stability and coefficients of thermal expansion of pure EP and GNP/(PEK-C-EP) composites were compared. The results show that the GNP/(PEK-C-EP) composites are superior to pure EP in thermal properties.
- double percolation effect,
- epoxy,
- polyetherketone cardo,
- graphene nanoplates,
- thermal conductivity
Long Abstrsct
Innovation Points

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References(27)

References

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