Magnetic nickel chain / graphene composite aerogel wave-absorbing material constructed by 3D printing strategy and preparation method of magnetic nickel chain / graphene composite aerogel wave-absorbing material

Magnetic nickel chain/graphene composite aerogel is constructed through 3D printing, and the synergistic effect of nickel chain and graphene is used to construct a stretchable structure in combination with 3D printing, which realizes the adjustable absorption performance of electromagnetic waves in multiple frequency bands, solving the problem of fixed electromagnetic characteristics and difficult to dynamically change in existing materials.

CN119697977APending Publication Date: 2025-03-25NANKAI UNIV
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Patent Information

Application Number
CN202411932836.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-26
Publication Date
2025-03-25

AI Technical Summary

Technical Problem

The electromagnetic characteristics of existing electromagnetic wave absorption materials are fixed, making it difficult to dynamically change their electromagnetic wave absorption performance, and cannot meet the needs of complexity in the information age and diversified modern radar frequency bands.

Method used

Magnetic nickel chain/graphene composite aerogel is constructed through 3D printing strategy, using the synergistic effect of the magnetic loss of the nickel chain and the dielectric loss of the graphene, and combining 3D printing to build a stretchable structure to achieve the multi-band adjustable absorption performance of electromagnetic waves in the microwave band.

Benefits of technology

The multi-band adjustable electromagnetic wave absorption performance in the microwave band, terahertz band and infrared band is achieved, and the problem of existing materials achieving better absorption performance in only a single frequency band is solved.

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Abstract

The invention relates to a magnetic nickel chain / graphene composite aerogel wave-absorbing material constructed through a 3D printing strategy and a preparation method of the magnetic nickel chain / graphene composite aerogel wave-absorbing material. A nickel chain precursor is synthesized into a high-orientation nickel chain under the action of a parallel magnetic field, and the high-orientation nickel chain is mixed with a graphene oxide solution to prepare the ink. The preparation method comprises the following steps: constructing composite aerogel with a rhombic structure by adopting an ink direct-writing 3D printing technology, and then performing freeze drying and annealing reduction in an argon atmosphere to obtain the nickel chain / graphene composite aerogel. The nickel chain is introduced to realize magnetic loss, and the electromagnetic wave loss mechanism of the composite material is enriched through the synergistic effect of the nickel chain and the dielectric loss of the graphene, so that the absorption attenuation effect of the material on electromagnetic waves is improved. Meanwhile, by applying stress, adjustable electromagnetic wave absorption performance in a microwave band is achieved, and therefore the problem that an existing electromagnetic wave absorption material only achieves good absorption performance in a single frequency band is solved.
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