In situ anchoring of Fe3O4/CNTs hybrids on basalt fiber for efficient electromagnetic wave absorption

Tiantian Si; Shuai Xie; Zhijiang Ji; Zihao Wu; Chao Ma; Junyu Wu; Jing Wang

doi:10.1088/1361-6528/ace365

In situ anchoring of Fe₃O₄/CNTs hybrids on basalt fiber for efficient electromagnetic wave absorption

Nanotechnology. 2023 Jul 19;34(40). doi: 10.1088/1361-6528/ace365.

Authors

Tiantian Si^{1

2}, Shuai Xie^{1

2}, Zhijiang Ji^{1

2}, Zihao Wu^{1

2}, Chao Ma^{1

2}, Junyu Wu^{1

2}, Jing Wang^{1

2}

Affiliations

¹ China Building Materials Academy, Beijing 100024, People's Republic of China.
² State Key Laboratory of Green Building Materials, Beijing 100024, People's Republic of China.

PMID: 37399797
DOI: 10.1088/1361-6528/ace365

Abstract

The development of practical and efficient electromagnetic wave (EMW) absorbing materials is a challenging research problem. A mussel-inspired molecular structure regulation strategy using polydopamine to increase the roughness and functional groups of basalt fiber (BF) surface, which can improve the fiber interfacial adhesion. Herein, a novel BF-Fe₃O₄/CNTs heterostructure is synthesized through a dip-coating adsorption process. The three-dimensional network structure of Fe₃O₄/CNTs hybridin situanchored on the surface of BF, which endows the composite to have good intrinsic magnetic and dielectric properties. Modulation of EMW absorption performance by controlling the addition of CNTs, the minimum RL of BF-Fe₃O₄/7C reaches to -40.57 dB at a thickness of 1.5 mm with CNTs addition of 7%. The enhanced EMW absorption performance of BF-Fe₃O₄/7C heterostructure may be attributed to the synergistic effects of interfacial polarization between the hollow magnetic Fe₃O₄spheres and CNTs, conduction loss, magnetic resonance loss and multiple reflection/scattering inside the BF. This work provides a simple pathway to design EMW absorbing materials with good environmental stability.

Keywords: Fe3O4/CNTs hybrid; conductive network; heterogeneous interfaces; synergistic interaction.