Charge Dynamics Engineering Sparks Hetero-Interfacial Polarization for an Ultra-Efficient Microwave Absorber with Mechanical Robustness

Xianhua Huan; Hefeng Li; Yuxiao Song; Jintao Luo; Cong Liu; Ke Xu; Hongbo Geng; Xiaodong Guo; Chen Chen; Lei Zu; Xiaolong Jia; Jisheng Zhou; Haobin Zhang; Xiaoping Yang

doi:10.1002/smll.202306104

Charge Dynamics Engineering Sparks Hetero-Interfacial Polarization for an Ultra-Efficient Microwave Absorber with Mechanical Robustness

Small. 2024 Feb;20(6):e2306104. doi: 10.1002/smll.202306104. Epub 2023 Sep 29.

Authors

Xianhua Huan^{1

2}, Hefeng Li², Yuxiao Song², Jintao Luo³, Cong Liu², Ke Xu⁴, Hongbo Geng⁴, Xiaodong Guo⁴, Chen Chen^{5

6}, Lei Zu⁷, Xiaolong Jia², Jisheng Zhou², Haobin Zhang², Xiaoping Yang²

Affiliations

¹ School of Electrical Engineering and Automation, Hefei University of Technology, Hefei, 230009, P. R. China.
² State Key Laboratory of Organic-Inorganic Composites, Key Laboratory of Carbon Fibre and Functional Polymer, Ministry of Education, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China.
³ Beijing Spacecraft Manufacturing Factory Co. Ltd., Beijing, 100094, P. R. China.
⁴ Inner Mongolia Aerospace Hong Gang Machinery Corporation Limited, Inner Mongolia, 010076, P. R. China.
⁵ Xi'an Institute of Aerospace Propulsion Technology, Xi'an, 710025, P. R. China.
⁶ The 41st Institute of the Fourth Academy of CSAC National Key Lab of Combustion, Flow and Thermo-structure, Xi'an, 710025, P. R. China.
⁷ School of Mechanical Engineering, Hefei University of Technology, Hefei, 230000, P. R. China.

PMID: 37775948
DOI: 10.1002/smll.202306104

Abstract

Microwave absorbers with high efficiency and mechanical robustness are urgently desired to cope with more complex and harsh application scenarios. However, manipulating the trade-off between microwave absorption performance and mechanical properties is seldom realized in microwave absorbers. Here, a chemistry-tailored charge dynamic engineering strategy is proposed for sparking hetero-interfacial polarization and thus coordinating microwave attenuation ability with the interfacial bonding, endowing polymer-based composites with microwave absorption efficiency and mechanical toughness. The absorber designed by this new conceptual approach exhibits remarkable Ku-band microwave absorption efficiency (-55.3 dB at a thickness of 1.5 mm) and satisfactory effective absorption bandwidth (5.0 GHz) as well as desirable interfacial shear strength (97.5 MPa). The calculated differential charge density depicts the uneven distribution of space charge and the intense hetero-interfacial polarization, clarifying the structure-performance relationship from a theoretical perspective. This work breaks through traditional single performance-oriented design methods and ushers a new direction for next-generation microwave absorbers.

Keywords: carbon fiber and ZnO; charge dynamics; hetero-interfacial polarization; mechanical robustness; microwave absorber.

Abstract

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