Preparation method of foam aluminium alloy wave-absorbing material

Abstract

The invention relates to a preparation method of a foam aluminium alloy wave-absorbing material, comprising surface pretreatment of foam aluminium alloy substrates, preparation of wave-absorbing coating and spraying of the wave-absorbing coating. The preparation method of the wave-absorbing material comprises the following steps of: (1) adding a coupling agent to polyaniline, adding a rare earth oxide after ball milling wet mixing, drying after ball milling wet mixing, and dry mixing to prepare a composite filler; (2) adding the coupling agent to the composite filler to prepare a coupling filler; (3) uniformly mixing a dispersing agent and a diluent, and adding the mixture to the coupling filler to prepare a dispersed filler; and (4) mixing epoxide resin with polyamide to prepare a film forming matter, grinding the film forming matter together with the dispersed filler, mixing, stirring, carrying out sonic oscillation, stirring and sieving, wherein the screenings are used as wave-absorbing coating. The wave-absorbing agent foam aluminium alloy-based wave-absorbing material doped with rare earth oxide has excellent wave-absorbing performance, and the bandwidth lower than -10dB can reach 13.5GHz in the frequency range of 26.5GHz to 40.0GHz.

Description

technical field

[0001] The invention belongs to the technical field of materials, and in particular relates to a preparation method of a foamed aluminum alloy wave-absorbing material. Background technique

[0002] Absorbing materials are developing in the direction of "thin, light, wide, and strong". Studies have shown that the absorbing performance of dense absorbing materials has been significantly improved after being made porous, and the density of the materials can be greatly reduced at the same time. However, the research reports on porous absorbing materials are relatively rare, and the analysis of its absorbing mechanism is still in the preliminary stage.

[0003] Porous metal foam material is a new type of porous lightweight metal material. People have systematically studied its damping, impact resistance, sound absorption and shock absorption, electromagnetic wave shielding and other properties. In recent years, the wave absorption performance of porous foam materi...

Examples

Embodiment 1

[0046] The coupling agent used is silane coupling agent KH-550;

[0047] The rare earth oxide used is cerium oxide;

[0048] The thinner that adopts is the mixed solution of n-butanol, xylene and propylene glycol methyl ether, and each material is n-butanol by volume ratio in the mixed solution: xylene: propylene glycol methyl ether=5: 3: 1;

[0049] The dispersant used is dispersant B401;

[0050] Add coupling agent to polyaniline, the amount of coupling agent is 2% of the total weight of polyaniline, with absolute ethanol as the medium, wet mix 20min with the speed of 200rpm in the ball mill; Then add rare earth oxide, rare earth oxide The addition amount is 1% of the total weight of polyaniline, and then the second wet mixing is carried out at a speed of 100 rpm in a ball mill for 8 hours; the material after the second wet mixing is dried to remove ethanol, and then dry mixed with a ball mill at a speed of 150 rpm for 4 hours to prepare into composite fillers;

[0051] A...

Embodiment 2

[0057] The coupling agent used is titanate coupling agent JN-115;

[0058] The rare earth oxide used is cerium oxide;

[0059] The thinner that adopts is the mixed solution of n-butanol, xylene and propylene glycol methyl ether, and each material is n-butanol by volume ratio in the mixed solution: xylene: propylene glycol methyl ether=6: 4: 1;

[0060] The dispersant used is dispersant B402;

[0061] Add coupling agent to polyaniline, the amount of coupling agent is 3% of the total weight of polyaniline, with absolute ethanol as medium, wet mixing 30min with the speed of 150rpm in ball mill; Then add rare earth oxide, rare earth oxide The amount of addition is 2% of the total weight of polyaniline, and then wet mixed for the second time in a ball mill at a speed of 200rpm for 4 hours; the material after the second wet mixed is dried to remove ethanol, and then dry mixed with a ball mill for 8 hours at a speed of 150rpm to prepare into composite fillers;

[0062] Add a coupl...

Embodiment 3

[0068] The coupling agent used is titanate coupling agent JN-108;

[0069] The rare earth oxide used is cerium oxide;

[0070] The diluent that adopts is the mixed solution of n-butanol, xylene and propylene glycol methyl ether, and each material is n-butanol by volume ratio in the mixed solution: xylene: propylene glycol methyl ether=5: 4: 1;

[0071] The dispersant used is dispersant CH-10S;

[0072] Add coupling agent in polyaniline, the amount of coupling agent is 4% of the total weight of polyaniline, take dehydrated alcohol as medium, wet mix 40min with the speed of 100rpm in ball mill; Then add rare earth oxide, rare earth oxide The addition amount is 5% of the total weight of polyaniline, and then wet mixed for the second time in a ball mill at a speed of 150rpm for 6 hours; the material after the second wet mixed is dried to remove ethanol, and then dry mixed with a ball mill for 6 hours at a speed of 150rpm to prepare into composite fillers;

[0073] Add a couplin...

technical field

[0001] The invention belongs to the technical field of materials, and in particular relates to a preparation method of a foamed aluminum alloy wave-absorbing material. Background technique

[0002] Absorbing materials are developing in the direction of "thin, light, wide, and strong". Studies have shown that the absorbing performance of dense absorbing materials has been significantly improved after being made porous, and the density of the materials can be greatly reduced at the same time. However, the research reports on porous absorbing materials are relatively rare, and the analysis of its absorbing mechanism is still in the preliminary stage.

[0003] Porous metal foam material is a new type of porous lightweight metal material. People have systematically studied its damping, impact resistance, sound absorption and shock absorption, electromagnetic wave shielding and other properties. In recent years, the wave absorption performance of porous foam materi...

Examples

Embodiment 1

[0046] The coupling agent used is silane coupling agent KH-550;

[0047] The rare earth oxide used is cerium oxide;

[0048] The thinner that adopts is the mixed solution of n-butanol, xylene and propylene glycol methyl ether, and each material is n-butanol by volume ratio in the mixed solution: xylene: propylene glycol methyl ether=5: 3: 1;

[0049] The dispersant used is dispersant B401;

[0050] Add coupling agent to polyaniline, the amount of coupling agent is 2% of the total weight of polyaniline, with absolute ethanol as the medium, wet mix 20min with the speed of 200rpm in the ball mill; Then add rare earth oxide, rare earth oxide The addition amount is 1% of the total weight of polyaniline, and then the second wet mixing is carried out at a speed of 100 rpm in a ball mill for 8 hours; the material after the second wet mixing is dried to remove ethanol, and then dry mixed with a ball mill at a speed of 150 rpm for 4 hours to prepare into composite fillers;

[0051] A...

Embodiment 2

[0057] The coupling agent used is titanate coupling agent JN-115;

[0058] The rare earth oxide used is cerium oxide;

[0059] The thinner that adopts is the mixed solution of n-butanol, xylene and propylene glycol methyl ether, and each material is n-butanol by volume ratio in the mixed solution: xylene: propylene glycol methyl ether=6: 4: 1;

[0060] The dispersant used is dispersant B402;

[0061] Add coupling agent to polyaniline, the amount of coupling agent is 3% of the total weight of polyaniline, with absolute ethanol as medium, wet mixing 30min with the speed of 150rpm in ball mill; Then add rare earth oxide, rare earth oxide The amount of addition is 2% of the total weight of polyaniline, and then wet mixed for the second time in a ball mill at a speed of 200rpm for 4 hours; the material after the second wet mixed is dried to remove ethanol, and then dry mixed with a ball mill for 8 hours at a speed of 150rpm to prepare into composite fillers;

[0062] Add a coupl...

Embodiment 3

[0068] The coupling agent used is titanate coupling agent JN-108;

[0069] The rare earth oxide used is cerium oxide;

[0070] The diluent that adopts is the mixed solution of n-butanol, xylene and propylene glycol methyl ether, and each material is n-butanol by volume ratio in the mixed solution: xylene: propylene glycol methyl ether=5: 4: 1;

[0071] The dispersant used is dispersant CH-10S;

[0072] Add coupling agent in polyaniline, the amount of coupling agent is 4% of the total weight of polyaniline, take dehydrated alcohol as medium, wet mix 40min with the speed of 100rpm in ball mill; Then add rare earth oxide, rare earth oxide The addition amount is 5% of the total weight of polyaniline, and then wet mixed for the second time in a ball mill at a speed of 150rpm for 6 hours; the material after the second wet mixed is dried to remove ethanol, and then dry mixed with a ball mill for 6 hours at a speed of 150rpm to prepare into composite fillers;

[0073] Add a couplin...

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