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Thermal conductivity and mechanical durability of graphene composite films containing polymer-filled connected multilayer graphene patterns

Authors
Bi, Jian ChengYun, HyesunCho, MinsongKwak, Min-GiJu, Byeong-KwonKim, Youngmin
Issue Date
15-6월-2022
Publisher
ELSEVIER SCI LTD
Keywords
Multilayer graphene; High thermal conductivity; Flexible; Folding test
Citation
CERAMICS INTERNATIONAL, v.48, no.12, pp.17789 - 17794
Indexed
SCIE
SCOPUS
Journal Title
CERAMICS INTERNATIONAL
Volume
48
Number
12
Start Page
17789
End Page
17794
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/142957
DOI
10.1016/j.ceramint.2022.03.049
ISSN
0272-8842
Abstract
Due to its high thermal conductivity, graphene has received much attention as a thermal interface material (TIM) for dissipating heat, which would otherwise be accumulated in heat sources, to heatsinks. However, the weak interlayer force induces tearing of graphene under repeated deformation; hence, the application of graphene as a TIM in the manufacturing of flexible electronics has been limited. To overcome this hurdle, the graphene composite (GC) films, in which thermoplastic polymers were infiltrated into connected multilayer graphene (MLG) patterns, were fabricated in this study. While the connected MLG patterns attained high in-plane thermal conductivity (kappa(x)), the polymers prevented tearing of the graphene. To investigate the effect of the graphene content on the kappa(x) of the GC films, the area of MLG patterns was carefully adjusted by coating a graphene solution through metal masks with various opening sizes. The kappa(x) of the GC-4 film was calculated as 53 W/m.K, which was slightly changed after 10,000 folding test cycles with a 1.5-mm bending radius.
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공과대학 (전기전자공학부)
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