Significantly thermally conductive cellulose composite film with graphene/boron nitride heterojunction structure achieved by combustion synthesis

Ping Gong, Linhong Li, Maohua Li, Siyi Zhang, Fengxia Yang, Yandong Wang, Xiangdong Kong, Huanyi Chen, Chengcheng Jiao, Xinxin Ruan, Tao Cai, Wen Dai, Zhongbin Pan, Yong Li, Linli Xu, Cheng Te Lin, Nan Jiang, Jinhong Yu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

4 Citations (Scopus)

Abstract

Boron nitride nanosheets (BNNSs) have been regarded as promising fillers to fabricate polymer-based composites for thermal management. However, the thermal resistance between BNNSs seriously restricts the further improvement of thermal conductivity (TC) for BNNS-based polymer composites. Herein, a rapid and high-yield method based on a combustion synthesis technique is developed to combine BNNSs and graphene (G) tightly as a hybrid filler, in which G was in-situ grown on the surface and interlayer of BNNSs, forming a special G@BNNS heterojunction structure. A foldable and thermal conductive composite film made of such G@BNNS filler and cellulose nanofiber (CNF) matrixes through filtration exhibits high in-plane and through-plane TC of 125.0 and 2.1 W/(m K), respectively. Such high TC is attributed to the reduced interfacial thermal resistance because of the high order and strong bridging effect of G with BNNSs. By utilizing this composite film as a heat spreader, heat dissipation is demonstrated effectively in high-power LED devices under high-power conditions over numerous cycles and heat dissipation can be carried out uniformly in the in-plane direction. Our findings indicate that G@BNNS/CNF films can meet both performance of maintenance and heat dissipation for thermal management, which are much needed for modern electronic devices.

Original languageEnglish
Article number101596
JournalComposites Communications
Volume40
DOIs
Publication statusPublished - Jun 2023

Keywords

  • Cellulose composites
  • Graphene/boron nitride heterojunction
  • Self-propagating high-temperature synthesis
  • Thermal conductivity

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Polymers and Plastics
  • Materials Chemistry

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