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Nacre-like robust cellulose nanofibers/MXene films with high thermal conductivity and improved electrical insulation by nanodiamond
作者:Enxiang Jiao, Kun Wu, Yingchun Liu, Hangzhen Zhang, Haoting Zheng, Chang-an Xu,Jun Shi,Mangeng Lu
關鍵字:GRAPHENE,PAPER,ULTRASTRONG,COMPOSITES,MXENE
論文來源:期刊
具體來源:JOURNAL OF MATERIALS SCIENCE
發表時間:2022年

The development of materials with efficient heat dissipation capabilities and remarkable mechanical properties is essential for high-power integrated electronic devices and flexible smart devices. Herein, a flexible cellulose nanofibers (CNF)/nanodiamond (ND)/MXene (CNM) composite film with typical nacrelike structure is fabricated using a facile vacuum-assisted filtration approach. The composite film exhibits high thermal conductivity of 17.43 W m-1 K-1 at the thickness of 21 lm, which enhances 663% compared with CNF film. This is mainly due to the bridging effect of ND and the favorable orientation of MXene nanosheets. In addition, nacre-like structure and strong hydrogen bonding between MXene and CNF endow satisfactory mechanical properties (89.14 ± 3.61 MPa). Moreover, it is worth to note that the film exhibits improved electrical insulation (1.63 9 106 X cm) on account of the intervene of the insulating ND block the conductive path formed by MXene. Therefore, the CNM composite films provide a feasible choice of thermal management components for high-power flexible devices.


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