Preparation and properties of flexible electromagnetic shielding composites

被引:4
作者
Du, Yao [1 ]
Dai, Zhixiang [1 ]
Bu, Fan [1 ]
Li, Manjiang [1 ]
Li, Gaiye [1 ]
Liu, Lei [2 ]
Wang, Jun [2 ]
Xu, Chuanhua [2 ]
Zhang, Jianfeng [1 ]
机构
[1] Hohai Univ, Coll Mech & Mat, Nanjing 211100, Peoples R China
[2] Sinosteel Maanshan New Mat Technol Co Ltd, Maanshan 243000, Peoples R China
关键词
HIGH-PERFORMANCE SUPERCAPACITOR; POROUS CARBON AEROGEL; SILICONE-RUBBER; CELLULOSE; TEMPERATURE; NANOFIBER;
D O I
10.1007/s10854-023-11641-x
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Although traditional metallic electromagnetic shielding materials have appeared for quite a long time, the defects of high density and poor flexibility have limited their further applications for modern society. Luckily, a flexible rubber stuffed with light conductive materials is promising to solve this puzzlement and hence has attracted much attention. In this paper, a novel kind of flexible electromagnetic shielding material system was invented using cobalt-plated carbon aerogel as a conductive filler in the silicone rubber matrix. With a cobalt content of 30%, the 8-layered composite reveals the tensile strength of the composite is 1.23 MPa, and the fracture elongation is 128.7%. The shielding efficiency was measured to be 11.56 dB, and the electromagnetic wave transmittance of the composite was significantly decreased to less than 10%, indicating that at least 90% of electromagnetic waves can be reflected or absorbed. This excellent electromagnetic shielding performance can be ascribed to a combined action of interlayer multiple reflections, low dielectric loss of carbon aerogel, and low magnetic loss of cobalt particles. In addition, the composite also shows a good hydrophobic and high thermal stability, further extending the application feasibility in complex environments.
引用
收藏
页数:16
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