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Controllable Fe ion-anchored graphene heterostructures for robust and highly thermal conductive cellulose nanofiber composites

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Abstract

Developing the polymer-based thermal interface materials (TIMs) is one of the most promising approaches to address heat accumulation along with the functionalization, integration, and miniaturization of modern electronics, while it is still a great challenge to balance the thermal conductivity and mechanical properties. In this article, Fe ion-anchored graphene (FeG) is successfully fabricated by a facile in situ Fe reduction of graphene oxide (GO) approach, and then cellulose nanofibers (CNFs)/FeG composites are prepared by vacuum-assisted filtration. FeG exhibits excellent dispersion and exfoliation in CNFs/FeG composites, due to the strong interfacial interaction between CNFs and FeG, such as hydrogen bonds and “Fe–O” complex binding. Thus, CNFs/FeG composite has the largely improved thermal conductivity up to 30.2 W/mK at FeG content of 50 wt%, which is substantially increased by 1160% in comparison with that of pure CNFs. In addition, the mechanical performances of CNFs/FeG-50 are unexpectedly simultaneously enhanced to 244 MPa for tensile strength, 4.10% for elongation at break, and 9.5 GPa for Young’s modulus, outperforming pure CNFs with increase of 137%, 33%, and 121%, respectively. This study provides a significant strategy for the design and construction of high thermal conductivity and high-performance polymeric TIMs in flexible and portable electronics.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (NSFC No. 51663003); Science and Technology Foundation of Guizhou Province (Grant No. [2019] 2166).

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Correspondence to Yuzhu Xiong.

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We have no conflicts of interest to declare that are relevant to the content of this article. We certify that they have no affiliations with or involvement in any organization or entity with any financial interest or non-financial interest in the subject matter or materials discussed in this manuscript. We have no financial or proprietary interests in any material discussed in this article.

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This article does not contain any studies with human participants or animals performed by any of the authors. All the experiments were undertaken in this study comply with the current laws of the country where they were performed.

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Shan, B., Xiong, Y. Controllable Fe ion-anchored graphene heterostructures for robust and highly thermal conductive cellulose nanofiber composites. Cellulose 28, 10305–10319 (2021). https://doi.org/10.1007/s10570-021-04202-0

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  • DOI: https://doi.org/10.1007/s10570-021-04202-0

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