期刊
CARBON
卷 216, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2023.118596
关键词
Graphene and other 2D-materials; 3D printing; Nano composites; Thermal properties; Additive manufacturing
In this study, a novel polymer-free nanothermite aerogel with a wide range of nanoparticle loading was fabricated via a new additive manufacturing process. The SEM images showed a unique porous structure formed by extra thin rGO sheets, wrapping individual nanothermite clusters. The DSC-TGA results and high-speed combustion videos confirmed the enhanced energetic performance of the printed specimen.
Aerogel, being extremely light and porous, is desirable for various applications of energetics such as a self-destructive microchip component. Additive manufacturing often requires a polymer binder which decreases thermal conductivity and changes combustion characteristics of the product. In this work, we fabricate a novel, polymer-free, reduced graphene oxide (rGO)-based Al/metal oxide nanothermite aerogel with a wide range of nanoparticle loading, via a new additive manufacturing process. SEM images revealed its unique porous structure formed by extra thin rGO sheets as the 3D skeleton, which wrapped Al and metal oxide nanoparticles into individual nanothermite clusters. DSC-TGA results and high-speed combustion videos confirmed the enhanced energetic performance of the printed specimen, suggesting the important role of rGO. A high linear burning rate of 5.8 m/s was achieved for a printed rGO/Al/metal oxide sample with a diameter of 1.6 mm (1/16) at 95 % thermite nanoparticle loading, and the propagation occurred at roughly the same rate with and against the print direction. This method allows for more complex 3D printing fabrication of various rGO/nanoparticle aerogels. Thermal camera footage clearly indicated the generation and increase of the pre-heating zone, reaction front, and cooling zone during the propagation. This method allows for more complex 3D printing fabrication of various rGO/nanoparticle aerogels.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据