School of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China; Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning 530004, China.
School of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China.
Carbohydr Polym. 2019 Jun 1;213:228-235. doi: 10.1016/j.carbpol.2019.02.087. Epub 2019 Mar 1.
As energy storage devices are becoming more highly integrated, it is inevitable that heat accumulation will occur under high power working conditions. Finding efficient thermal management materials for cooling down electronic components is an urgent problem for energy storage devices. In this work, a thermally conductive film with tailorable macroproperties is fabricated by using a simple vacuum filtration method, using cellulose nanofibrils as the polymer substrate and assembly with aluminum nitride nanosheets. The interaction between the cellulose nanofibrils and aluminum nitride nanosheets is studied, and the electronic components made using the composite exhibit excellent thermal conductivity, thermal stability and mechanical flexibility. A high thermal conductivity is achieved along the film surface (up to 4.20 W/mK for 25 wt.% of aluminum nitride). This green material can effectively promote potential applications as lateral heat spreaders in flexible energy storage devices and the thermal conductivity may facilitate the applications in thermal management.
随着储能设备的日益高度集成，在高功率工作条件下不可避免地会发生热积聚。寻找高效的热管理材料来冷却电子元件是储能设备的一个紧迫问题。在这项工作中，使用简单的真空过滤方法，以纤维素纳米纤维作为聚合物基底并与氮化铝纳米片组装，制备了具有可定制宏观性能的导热薄膜。研究了纤维素纳米纤维和氮化铝纳米片之间的相互作用，并用复合材料制作的电子元件表现出优异的导热性、热稳定性和机械柔韧性。在薄膜表面实现了高热导率（氮化铝含量为 25wt.%时高达 4.20W/mK）。这种绿色材料可以有效地促进作为柔性储能器件横向散热片的潜在应用，其导热性可能有助于热管理的应用。
