首页|Compressible thermoplastic polyurethane/silver nanorod foams for absorption dominant electromagnetic interference shielding

Compressible thermoplastic polyurethane/silver nanorod foams for absorption dominant electromagnetic interference shielding

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Conductive polymer composites(CPCs)have attracted significant interest in the field of flexible electro-magnetic protection,but the challenge of balancing high electromagnetic interference shielding effec-tiveness(EMI SE)and low reflection losses still exists.Herein,thermoplastic polyurethane/silver nanorod(TPU/AgNR)composite foams have been successfully prepared using both the salt template and vacuum-assisted thermal compression methods.By varying the AgNRs content and employing a layer-by-layer bonding approach,a gradient structure with optimized impedance matching is achieved.The"absorb-reflect-reabsorb"EM attenuation mechanism of the asymmetric gradient EMI shielding in the internal structure is exploited,resulting in TPU/AgNR foam(TAF)with high EMI SE and significantly reduced EM reflection.Notably,the three-layer foams exhibit an average shielding efficacy of 35.5 dB and a reflected power coefficient(R)of 0.085 in the X-band,thereby substantially mitigating secondary EM wave reflec-tions.Furthermore,these foams demonstrate exemplary compressive resilience,with the sample main-taining excellent EMI shielding stability even after undergoing 100 compression cycles at 50％strain.Consequently,a straightforward approach is employed to fabricate materials with high EMI SE and low reflectivity,offering the potential for use in EM shielding applications of next-generation flexible elec-tronic devices.

Thermoplastic polyurethane foamAsymmetric gradient structureEMI shieldingEM wave absorptionMechanical properties

Zhaoyang Li、Yong Shen、Yang Zhou、Bing Zhou、Chuntai Liu、Yuezhan Feng

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State Key Laboratory of Structural Analysis,Optimization and CAE Software for Industrial Equipment,National Engineering Research Center for Advanced Polymer Processing Technology,Zhengzhou University,Zhengzhou 450002,China

Shangqiu Normal University,Shangqiu 476000,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of China of Henan ProvinceKey Scientific Research Projects of Colleges and Universities in Henan Province,China

522730855230311322230042054124A430045

2024

10.1016/j.jmst.2024.01.072

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.197(30)