Boosting the in-plane thermal conductivity of nanofibrillated cellulose films: alignment engineering of cross-linked AlN whiskers

文献情報

出版日 2023-10-04

DOI 10.1039/D3TA04770A

インパクトファクター 12.732

著者

Mengyang Niu, Zheng Zhao, Baokai Wang, Chang Yu, Mengyi Li, Jiajun Hu, Lifeng Zhu, Xu Hao, Shiqin Wan, Ming Yue, Weiwei Xuan, Qipeng Lu, Wenbin Cao, Kexin Chen, Qi Wang

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要旨

With the rapid advancement of foldable electronic devices, ultra-light, flexible and anisotropic composite films with high in-plane thermal conductivity have garnered significant attention. Aluminum nitride (AlN), as a ceramic material with extremely high intrinsic thermal conductivity, has been considered as one of the ideal thermally conductive fillers. However, conventional angular AlN particles (AlNp) need to maximize the filling fraction to achieve high thermal conductivity, yet resulting in increased costs and decreased mechanical strength of composites. In this work, innovative one-dimensional AlN whiskers (AlNw) with high aspect ratio were synthesized using a modified direct nitridation method, which were further combined with nanofibrillated cellulose (NFC) to prepare anisotropic thermal conductive films using a facile vacuum filtration method. The composite films exhibited an exceptionally high in-plane thermal conductivity of 22.78 W m−1 K−1 at 70 wt% AlNw loading, which could be attributed to the alignment of cross-linked AlNw along the horizontal direction and the strong hydrogen bonding interactions between AlNw and NFC. The higher thermal conductivity enhancement effect of AlNw over AlNp was also demonstrated by an actual thermal transfer application and finite element simulations. Furthermore, the NFC/AlNw composite films also demonstrated superior thermal stability, mechanical strength, flexibility, and electrical insulation performance, indicating their broad potential applications in the field of thermal management materials.

掲載誌

Journal of Materials Chemistry A

CiteScore: 19.5

自己引用率: 4.7%

年間論文数: 2211

Journal of Materials Chemistry A, B & C cover high quality studies across all fields of materials chemistry. The journals focus on those theoretical or experimental studies that report new understanding, applications, properties and synthesis of materials. The journals have a strong history of publishing quality reports of interest to interdisciplinary communities and providing an efficient and rigorous service through peer review and publication. The journals are led by an international team of Editors-in-Chief and Associate Editors who are all active researchers in their fields. Journal of Materials Chemistry A, B & C are separated by the intended application of the material studied. Broadly, applications in energy and sustainability are of interest to Journal of Materials Chemistry A, applications in biology and medicine are of interest to Journal of Materials Chemistry B, and applications in optical, magnetic and electronic devices are of interest to Journal of Materials Chemistry C. More than one Journal of Materials Chemistry journal may be suitable for certain fields and researchers are encouraged to submit their paper to the journal that they feel best fits for their particular article. Example topic areas within the scope of Journal of Materials Chemistry A are listed below. This list is neither exhaustive nor exclusive. Artificial photosynthesis Batteries Carbon dioxide conversion Catalysis Fuel cells Gas capture/separation/storage Green/sustainable materials Hydrogen generation Hydrogen storage Photocatalysis Photovoltaics Self-cleaning materials Self-healing materials Sensors Supercapacitors Thermoelectrics Water splitting Water treatment

Boosting the in-plane thermal conductivity of nanofibrillated cellulose films: alignment engineering of cross-linked AlN whiskers

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