Polymer self-assembly guided heterogeneous structure engineering towards high-performance low-frequency electromagnetic wave absorption

Qingfu Ban; Luwei Li; Yan Li; Huimin Liu; Yaochen Zheng; Yusheng Qin; Hongru Zhang; Jie Kong

doi:10.1016/j.jcis.2023.07.054

Polymer self-assembly guided heterogeneous structure engineering towards high-performance low-frequency electromagnetic wave absorption

J Colloid Interface Sci. 2023 Nov 15;650(Pt B):1434-1445. doi: 10.1016/j.jcis.2023.07.054. Epub 2023 Jul 10.

Authors

Qingfu Ban¹, Luwei Li², Yan Li², Huimin Liu³, Yaochen Zheng², Yusheng Qin², Hongru Zhang², Jie Kong⁴

Affiliations

¹ College of Chemistry and Chemical Engineering, Yantai University, 30 Qingquan Road, Yantai 264005, PR China. Electronic address: banqingfu@ytu.edu.cn.
² College of Chemistry and Chemical Engineering, Yantai University, 30 Qingquan Road, Yantai 264005, PR China.
³ Shaanxi Key Laboratory of Macromolecular Science and Technology, MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710072, PR China.
⁴ Shaanxi Key Laboratory of Macromolecular Science and Technology, MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710072, PR China. Electronic address: kongjie@nwpu.edu.cn.

PMID: 37481781
DOI: 10.1016/j.jcis.2023.07.054

Abstract

Magnetic-dielectric synergy is currently regarded as among the most effective approaches to achieve low-frequency electromagnetic wave absorption (EMA). However, designing and fabricating EMA materials with tunable magnetic-dielectric balance towards high-performance low-frequency EMA remains challenging. Herein, a polymer self-assembly guided heterogeneous structure engineering strategy is proposed to fabricate hierarchical magnetic-dielectric nanocomposite. Polymer assemblies not only can be employed as intermediates to encapsulate metal-organic frameworks and load metal hydroxide, but also that they play a crucial role for the in-situ formation of polycrystalline FeCo/Co composite nanoparticles. As a result, the minimum reflection loss (RL_min) can reach -59.61 dB at 5.4 GHz (4.8 mm) with a 20 wt% filler loading, while the effective absorption bandwidth (EAB, RL_min ≤ -10 dB) is 2.16 GHz, exhibiting excellent low-frequency EMA performance. Systematic investigations demonstrate that hierarchical mesoporous carbon matrix that supports FeCo/Co composite nanoparticles is beneficial for optimizing impedance matching and increasing attenuation capacity. In general, this study opens up new prospects for developing magnetic-dielectric EMA materials using a polymer self-assembly guided heterogeneous structure engineering strategy, which may receive significant attention in future research.

Keywords: Electromagnetic wave absorption; Heterogeneous structure; Low frequency; Magnetic-dielectric synergy; Polymer self-assembly.