期刊
COMPOSITES SCIENCE AND TECHNOLOGY
卷 228, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2022.109665
关键词
Nano particles; Structural composites; Dielectricity; Electrical properties; Mechanochemistry
资金
- National Natural Science Foundation of China [51873112]
In this study, core-shell CB@ACR nanocomposites were prepared using a solvent-free mechanochemical approach to improve the impedance mismatch characteristics and enhance the absorption performance of CB. The ACR shell effectively coated the surface of CB, resulting in a stronger, wider, and thinner microwave absorption performance.
For carbon black (CB) absorbers with high dielectric loss, improving the impedance mismatch characteristics is the key to achieving high absorption of electromagnetic waves. Herein, acrylic resin (ACR) is served as the matching layer for CB, and core-shell CB@ACR nanocomposites are prepared by a solvent-free mechanochemical approach. The ACR shell is an insulating polymer that can avoid mutual contact between CB particles to form conductive channels, resulting in the optimization of the impedance matching. Specifically, methyl methacrylate is firstly grafted on the surface of CB by ball milling to improve the compatibility between CB and ACR, and then ACR is wrapped on its surface using the same method. The measurement results show that the ACR is successfully coated on the surface of the CB, forming a core-shell structure with a 14.8-33.3 wt% encapsulation ratio. With a proper encapsulation ratio, the minimum reflection loss of the CB@ACR composites is enhanced by about 160%, the widest effective absorption bandwidth is widened by about 642%, and the corresponding thickness becomes thinner than pristine CB, achieving a stronger, wider, thinner. In summary, this work provides an innovative and effective approach to modifying absorbers for excellent microwave absorption performance.
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