Manufacturing method of graphene-filled honeycomb core wave-absorbing stealth composite material

Abstract

The invention discloses a manufacturing method of a graphene-filled honeycomb core wave-absorbing stealth composite material, and belongs to the technical field of composite material molding, and the manufacturing method comprises the following steps: manufacturing and cutting a skin to a required size in advance; bonding the honeycomb core material on the skin at normal temperature by using a special adhesive film, and filling graphene powder materials with different contents or different components into core grids of the honeycomb core material; after filling is completed, covering the upper surface of the honeycomb core material with a special adhesive film, then placing a cured composite fiberboard and assembling into an autoclave to be cured, and finally forming the graphene-filled honeycomb core wave-absorbing composite material. The structure of the honeycomb core material or the components and the content of the filled graphene material can be changed according to different wave-absorbing frequency band requirements, and the wave-absorbing stealth composite material with the honeycomb core filled with the graphene and meeting the requirements of various wave-absorbing frequency bands can be manufactured.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a method for manufacturing a graphene-filled honeycomb core wave-absorbing stealth composite material. Background technique [0002] Graphene is a single-atom layer, six-ring honeycomb lattice structure composed of carbon atoms in sp2 hybrid orbitals. This special two-dimensional structure endows graphene with excellent strength, toughness, light transmission, electrical conductivity and thermal conductivity. Especially its electrical properties, the linear Dirac-like function electronic density distribution of graphene near the Fermi surface makes graphene a zero-band gap semiconductor material or metalloid conductor. At room temperature, the carrier mobility of graphene can reach 15,000 cm2 / V s, which is 10 times that of silicon materials and more than twice that of indium antimonide (InSb), the material with the highest known carrier mobility. Coupled with the excellent li...

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Problems solved by technology

[0008] (4) The high conductivity of graphene forms more eddy current effects and generates heat loss

[0014] 1. The technical process of this scheme is relatively complicated, and it is not yet mature, and it is basically in the laboratory research stage;

[0015] 2. The thickness of the graphene coating layer should not be too thick, and there is a limited range, so the performance control is also limited;

[0016] 3. The graphene coating layer is also prone to aging, cracking or deterioration, resulting in weakened or even lost performance;

[0017] 4. The surface coating and adhesion performance of the graphene coating is not good, and it is easy to fall off in the use environment;

[0018] 5. According to current understanding, the effective absorption of the graphene-coated wave-absorbing honeycomb core composite material in the 2-18GHz radar wave is mainly concentrated in the low-frequency band of 2 GHz and below, and the medium-frequency and high-frequency wave-absorbing performance is not good.

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