石墨烯增强Fe3O4/乙基纤维素复合微球吸波性能

doi:10.7527/S1000-6893.2022.27549

Abstract

Abstract:

Multi-component composite materials are conducive to the realization of high-efficiency， light-weight and broadband absorbing effects， and have important research and application value in the aerospace field. Reduced Graphene Oxide （rGO）-Fe₃O₄/Ethyl Cellulose （Ec） composite microspheres with Ec as the skeleton were prepared by emulsification reaction， and the physical structure， microscopic morphology and electromagnetic properties of the composite microspheres were characterized and analyzed by X-Ray Diffractometer （XRD）， Raman Spectroscopy （Raman）， Scanning Electron Microscopy （SEM） and Vector Network Analyzer （VNA）. The results show that the composite microspheres are ordered internally by the combination of Ec with rGO and Fe₃O₄， and Ec forms a rich porous structure， which enhances multiple reflection and scattering of microwaves. When the graphene content is 6.6wt% and the thickness is 1.8 mm， the minimum reflection loss （–30.35 dB） is achieved at 14.32 GHz， and the effective absorption bandwidth is 4.88 GHz （12.24–17.12 GHz）.

Key words: graphene, composite, absorbing mechanism, impedance matching, Fe₃O₄

CLC Number:

V257

Yongsheng YE, Di DING, Haihua WU, Enyi HE, Shihao YIN, Zhenglang HU, Chao YANG. Graphene-enhanced Fe₃O₄/ethylcellulose composite microspheres with wave absorption properties[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2023, 44(11): 427549.

Figures/Tables 16

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名称	含量/g
名称	Ec	Fe₃O₄	rGO
0wt% rGO-Fe₃O₄/Ec	2.5	2.0	0
1.4wt% rGO-Fe₃O₄/Ec	2.5	2.0	0.1
4.1wt% rGO-Fe₃O₄/Ec	2.5	2.0	0.3
6.6wt% rGO-Fe₃O₄/Ec	2.5	2.0	0.5
7.8wt% rGO-Fe₃O₄/Ec	2.5	2.0	0.6
10.2wt% rGO-Fe₃O₄/Ec	2.5	2.0	0.8

材料	基体	最小反射损耗/dB	厚度/mm	有效吸收频宽/GHz
Fe₃O₄/rGO^［29］	石蜡	-22.10	5.00	3.30
Fe₃O₄/rGO^［30］	石蜡	-22.70		3.13
Fe₃O₄-rGO^［31］	石蜡	-30.10	1.48
rGO/Fe₃O₄^［32］	石蜡	-42.10	3.50
rGO-Fe₃O₄^［33］	石蜡	-48.60	2.10	6.32
Fe₃O₄/rGO^［34］	石蜡	-65.10	1.70	4.64
Fe₃O₄/石墨烯纳米片^［35］	石蜡	-8.75	1.50	-2.50
Fe₃O₄/poly/rGO^［36］	石蜡	-15.68	4.00	2.00
Fe₃O₄/Fe纳米环@rGO^［37］	石蜡	-23.09	4.00	3.90
Fe₃O₄@C/rGO^［38］	石蜡	-59.23	1.50	6.24
Fe₃O₄@SiO₂/rGO^［39］	石蜡	-55.40	3.50	6.24
C-Fe₃O₄/石墨烯^［40］	石蜡	-31.20	10.00
石墨烯纳米片-介孔Fe₃O₄@ZnO^［41］	石蜡	-40.00		11.40

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Graphene-enhanced Fe₃O₄/ethylcellulose composite microspheres with wave absorption properties

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Graphene-enhanced Fe₃O₄/ethylcellulose composite microspheres with wave absorption properties