材料科学
复合材料
复合数
吸收(声学)
反射损耗
介电常数
微波食品加热
导电体
兴奋剂
电介质
介电损耗
阻抗匹配
偶极子
光电子学
电阻抗
计算机科学
电气工程
电信
工程类
有机化学
化学
作者
Fei Pan,Lei Cai,Yuyang Shi,Dong Yao,Xiaojie Zhu,Jie Cheng,Haojie Jiang,Xiao Wang,Zhong Shi,Wei Lu
标识
DOI:10.1016/j.cej.2022.135009
摘要
Microscopic manipulation and appropriate multicomponent design are still challenging for keeping up with the future development direction for high-efficient electromagnetic wave (EMW) absorbers with unique structure. In this work, apple tree-like Galinstan/Ni-Ni3P/N-doped carbon fiber composites were successfully fabricated through electroless plating and subsequent pyrolysis process. N-doped carbon fiber, derived from silkworm cocoons, is employed as one-dimensional skeleton to generate conductive network and dipole polarization due to intrinsic existence of amino acids. The phase engineering from amorphous Ni-P to crystalline Ni-Ni3P create countless heterogeneous interfaces, double conductive pathway and enhanced permeability, thus promoting the dielectric/magnetic response with incident EMW. And the introduction of the Galinstan is beneficial to manipulate the permittivity and impedance matching degree. By tailoring pyrolysis temperature, the optimal composite produces outstanding EMW absorption performance at the thickness of only 2.05 mm, whose strongest reflection loss can reach −51.73 dB with an effective absorption bandwidth ranging from 9.7 to 13.5 GHz. Besides, CST simulation also evidently show the suppression (13.7 dBm2) with incident EMW of samples in the actual environment. This thorough exploration of the phase engineering and bio-inspired construction of multicomponent system develops a referable route toward the high-efficient EMW absorbers.
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