Asymmetric magnetic-electric dual-functional composite foams for ultra-efficient electromagnetic interference shielding with unprecedented low reflection

被引：33

作者：

Sun, Binbin ^{[1
]}

Sun, Shuangjie ^{[1
]}

Guo, Yan ^{[1
]}

Mi, Hao-Yang ^{[1
]}

Jing, Xin ^{[2
]}

Jiang, Xiulei ^{[3
]}

Dong, Binbin ^{[1
]}

Liu, Chuntai ^{[1
]}

Shen, Changyu ^{[1
]}

机构：

[1] Zhengzhou Univ, Natl Engn Res Ctr Adv Polymer Proc Technol, Key Lab Adv Mat Proc & Mold, Minist Educ, Zhengzhou 450001, Peoples R China

[2] Hunan Univ Technol, Key Lab Adv Packaging Mat & Technol Hunan Prov, Zhuzhou 412007, Peoples R China

[3] Shincell New Mat Co Ltd, Suzhou 215000, Peoples R China

来源：

COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2023年 / 164卷

基金：

中国国家自然科学基金;

关键词：

Polymer-matrix composites (PMCs); Electrical properties; Foaming; Electromagnetic interference shielding; PERFORMANCE; GRAPHENE; FABRICATION;

D O I：

10.1016/j.compositesa.2022.107301

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Asymmetric composite foams comprised of iron oxide decorated reduced graphene oxide (Fe3O4@rGO)/earbon nanotube (CNT)/thermoplastic polyurethane (TPU) foams and a silver layer were developed by vacuum-assisted hot-pressing and supercritical carbon dioxide (scCO(2)) foaming. The magnetic-electric dual-functional network constructed by Fe3O4@rGO and CNT nanofillers rendered the foam excellent impedance matching and wave attenuation capability, achieving -46.8 dB reflection loss at similar to 2 mm sample thickness. With the reflective silver layer, the asymmetric composite foam realized a unique "low reflection-absorption-reflection-reabsorption" EM wave depletion mechanism and reached preeminent total shielding effectiveness (SET) of 89.2-103.5 dB with a reflection shielding effectiveness (SER) of 0.24-0.83 dB. The optimized composite foam achieved a low reflectivity (R) of 0.05 (Average value) and a minimum value of 0.001, which holds the lowest record among EMI shielding materials with comparable SE. This work provides new insights into the design of high-efficiency shielding materials with ultra-low reflection features for cutting-edge EMI shielding applications.

引用

页数：10