Anisotropically enhanced thermal conductivity of polymer composites based on segregated nanocarbon networks

Gyun Young Yoo; Ki Hoon Kim (김기훈); Yong Chae Jung (정용채); Hunsu Lee (이훈수); Seong Yun Kim (김성윤)

doi:10.1007/s42823-024-00799-x

Anisotropically enhanced thermal conductivity of polymer composites based on segregated nanocarbon networks

Carbon Letters
Abbr : Carbon Lett.
2025, 35(1), pp.321~329
DOI : 10.1007/s42823-024-00799-x
Publisher : Korean Carbon Society
Research Area : Natural Science > Natural Science General > Other Natural Sciences General
Received : July 9, 2024
Accepted : August 24, 2024
Published : March 28, 2025

Gyun Young Yoo ¹, Ki Hoon Kim ², Yong Chae Jung ³, Hunsu Lee ³, Seong Yun Kim ²

¹Jeonbuk National University
²전북대학교
³한국과학기술연구원

Accredited

ABSTRACT

Segregated composites, where fillers are selectively placed at the matrix interface to form a segregated filler network, are attracting attention because they can provide excellent conductive properties at low filler content. In this study, the anisotropic enhancement in thermal conductivity of composites was discovered due to the unique structure of the segregated network. The segregated composites were produced using a typical mechanical mixing of matrix pellets and the internal structure was precisely analyzed using three-dimensional non-destructive analysis. The segregated composites slightly improved in the through-plane thermal conductivity, but the in-plane thermal conductivity increased rapidly, showing the anisotropic thermal conductivity. The maximum improvement in the in-plane thermal conductivity of the segregated composites increased by 112.5 (at 7 wt% graphene nanoplatelet) and 71.4% (at 10 wt% multi-walled carbon nanotube), respectively, compared to that of the random composites filled with the same amount of filler. On the other hand, the electrical conductivity of the segregated composites was isotropic due to the difference in the transport mechanisms of electrons and phonons. The anisotropic thermal conductivity developed by the segregated network was helpful in inducing effective heat dissipation of commercial smartphone logic boards.

KEYWORDS

Segregated composites, Thermal conductivity, Electrical conductivity, Internal structure

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This is the result of checking the information with the same ISSN, publication year, volume, and start page between the WoS and the KCI journals. (as of 2026-07-09)

Total Citation Counts(KCI+WOS) (4) This is the number of times that the duplicate count has been removed by comparing the citation list of WoS and KCI.

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Carbon Letters 2025 KCI Impact Factor : 0.73 KCI-WoS Impact Factor : 6.26

Anisotropically enhanced thermal conductivity of polymer composites based on segregated nanocarbon networks

ABSTRACT

KEYWORDS

Citation status

This is the result of checking the information with the same ISSN, publication year, volume, and start page between the WoS and the KCI journals. (as of 2026-07-09)

Total Citation Counts(KCI+WOS) (4) This is the number of times that the duplicate count has been removed by comparing the citation list of WoS and KCI.

* References for papers published after 2025 are currently being built.

Carbon Letters 2025 KCI Impact Factor : 0.73 KCI-WoS Impact Factor : 6.26

Anisotropically enhanced thermal conductivity of polymer composites based on segregated nanocarbon networks

ABSTRACT

KEYWORDS

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WoS Citation Counts (4) This is the result of checking the information with the same ISSN, publication year, volume, and start page between the WoS and the KCI journals. (as of 2026-07-09)

Total Citation Counts(KCI+WOS) (4) This is the number of times that the duplicate count has been removed by comparing the citation list of WoS and KCI.

REFERENCES (33) * References for papers published after 2025 are currently being built.

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Citation

This is the result of checking the information with the same ISSN, publication year, volume, and start page between the WoS and the KCI journals. (as of 2026-07-09)

* References for papers published after 2025 are currently being built.