3D Printing of Periodic Porous Metamaterials for Tunable Electromagnetic Shielding Across Broad Frequencies  

作　　者：Qinniu Lv Zilin Peng Haoran Pei Xinxing Zhang Yinghong Chen Huarong Zhang Xu Zhu Shulong Wu 

机构地区：[1]State Key Laboratory of Polymer Materials Engineering,Polymer Research Institute of Sichuan University,No.24 South Section 1,Yihuan Road,Chengdu 610065,People’s Republic of China [2]Baosheng Technology Innovation Corporation Limited,No.1,Suzhong Road,Baoying County,Yangzhou 225800,People’s Republic of China

出　　处：《Nano-Micro Letters》2024年第12期533-552,共20页纳微快报（英文版）

基　　金：supported by the National Key R&D Program of China(2023YFB4603504);the International Science&Technology Innovation Cooperation Project of Sichuan Province(2024YFHZ0232);the International Science&Technology Cooperation Project of Chengdu(2021-GH03-00009-HZ);the Program for Featured Directions of Engineering Multi-disciplines of Sichuan University(2020SCUNG203);the Program of Innovative Research Team for Young Scientists of Sichuan Province(22CXTD0019).

摘　　要：The new-generation electronic components require a balance between electromagnetic interference shielding efficiency and open structure factors such as ventilation and heat dissipation.In addition,realizing the tunable shielding of porous shields over a wide range of wavelengths is even more challenging.In this study,the well-prepared thermoplastic polyurethane/carbon nanotubes composites were used to fabricate the novel periodic porous flexible metamaterials using fused deposition modeling 3D printing.Particularly,the investigation focuses on optimization of pore geometry,size,dislocation configuration and material thickness,thus establishing a clear correlation between structural parameters and shielding property.Both experimental and simulation results have validated the superior shielding performance of hexagon derived honeycomb structure over other designs,and proposed the failure shielding size(D_(f)≈λ/8-λ/5)and critical inclined angle(θf≈43°-48°),which could be used as new benchmarks for tunable electromagnetic shielding.In addition,the proper regulation of the material thickness could remarkably enhance the maximum shielding capability(85-95 dB)and absorption coefficient A(over 0.83).The final innovative design of the porous shielding box also exhibits good shielding effectiveness across a broad frequency range(over 2.4 GHz),opening up novel pathways for individualized and diversified shielding solutions.

关 键 词：Polymeric component 3D printing Tunable electromagnetic shielding Periodic porous metamaterials Honeycomb pore structure 

分 类 号：TB34[一般工业技术—材料科学与工程] TP391.73[自动化与计算机技术—计算机应用技术]