Multiscale collaborative coupling of wood-derived porous carbon modified by three-dimensional conductive magnetic networks for electromagnetic interference shielding

被引：63

作者：

Cheng, Mingliang ^{[1
]}

Ren, Wenling ^{[1
]}

Li, Hongxia ^{[1
]}

Liu, Xianguo ^{[1
]}

Bandaru, Sateesh ^{[1
]}

Zhang, Jian ^{[1
]}

Zhang, Xuefeng ^{[1
,2
]}

机构：

[1] Hangzhou Dianzi Univ, Coll Mat & Environm Engn, Inst Adv Magnet Mat, Hangzhou 310012, Peoples R China

[2] Northeastern Univ, Sch Mat Sci & Engn, Key Lab Anisotropy & Texture Mat MOE, Shenyang 110819, Peoples R China

来源：

COMPOSITES PART B-ENGINEERING | 2021年 / 224卷 / 224期

关键词：

EMI shielding; Wood-derived carbon; Hierarchical structure; Multiscale collaborative coupling; Multifunctional; MICROWAVE-ABSORPTION; COMPOSITE FOAMS; RAMAN-SPECTROSCOPY; NATURAL WOOD; LIGHTWEIGHT; AEROGELS; PERFORMANCE; ULTRALIGHT; GRAPHENE; STIFF;

D O I：

10.1016/j.compositesb.2021.109169

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The contribution of shielding materials to electromagnetic interference (EMI) shielding can be divided into reflection loss and absorption loss, but the mechanism of how to coordinate their balance is ambiguous in previous studies. To this end, we propose a strategy to prepare conductive magnetic networks consisting of Ndoped carbon nanotubes (NCNTs) and Ni nanoparticles in carbonized wood (CW) by chemical vapor-phase catalysis. The multi-scale collaborative coupling effect of micron-scale skeleton channels, nano-scale network gaps and atomic-scale elemental doping achieves the matching of the above two electromagnetic losses. The optimized Ni@NCNT/CW composite exhibits an average EMI shielding effectiveness (EMI-SE) of 73.7 dB with ultra-low density (0.541 g/cm3) across the entire X-band (8.2-12.4 GHz), as well as fine hydrophobicity (118.6 degrees) and fire resistance. Meanwhile, in the electromagnetic attenuation capability simulation, the absorptionreflection ratio changes from absorption-dominated to reflection-dominated with the change of structural scale, which is highly consistent with the experimental test trend. This research proposes a novel insight that multiscale collaborative coupling is an effective strategy to coordinate and optimize the shielding combination mechanism.

引用

页数：12

共 77 条

[1] Biochar as a Fuel: 1. Properties and Grindability of Biochars Produced from the Pyrolysis of Mallee Wood under Slow-Heating Conditions [J].