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Liquid metal foamy elastomer preparation method and equipment based on negative pressure injection

A liquid metal and foam-like technology, applied in heat exchange equipment, stators, transmissions, etc., can solve the problems of unconnected passages, etc., and achieve the effects of low cost, simple preparation process, and excellent electrical conductivity

Active Publication Date: 2022-01-21
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the patent CN112969302A, the liquid metal and polypyrrole are ultrasonically dispersed and coated on the surface of the TPU material, thereby preparing the liquid metal core-shell composite material, but in the liquid metal composite material prepared by the method, the liquid metal is in a spherical separation state, and there is no composition together with the pathway

Method used

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  • Liquid metal foamy elastomer preparation method and equipment based on negative pressure injection
  • Liquid metal foamy elastomer preparation method and equipment based on negative pressure injection
  • Liquid metal foamy elastomer preparation method and equipment based on negative pressure injection

Examples

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Embodiment 1

[0031] A method for preparing a liquid metal foamed elastomer based on negative pressure injection, specifically according to the following steps:

[0032] S1, preparing the flexible porous substrate 6; there are interconnected micropores inside the flexible porous substrate 6, and the outer layer of the flexible porous substrate 6 is closed;

[0033] S2, taking away the air inside the flexible porous substrate 6, so that the flexible porous substrate 6 is in a state of negative pressure contraction, and the gas in the micropores is completely discharged;

[0034] S3, when the flexible porous substrate 6 maintains the original negative pressure contraction state, the liquid metal is pushed into the interconnected micropores inside the flexible porous substrate 6 by an external force against the resistance, that is.

Embodiment 2

[0036] A method for preparing a liquid metal foamed elastomer based on negative pressure injection, specifically according to the following steps:

[0037] S1, installation equipment; the equipment includes a vacuum pump 1, a pusher 2, a hollow injection needle 3, a three-way closable communication valve 4 and a connecting pipeline 5, and the vacuum pump 1 is connected to the first port of the three-way closable communication valve 4 through the connecting pipeline 5 Connected; the pusher 2 is connected with the second port of the three-way closable communication valve 4 through the connecting pipe 5; the hollow injection needle 3 is connected with the third port of the three-way closable communication valve 4 through the connecting pipe 5; the hollow injection needle 3 Insert the micropores inside the flexible porous substrate 6; the three ports of the three-way closable communication valve 4 are all in a closed state.

[0038] Vacuum pump 1 is used for taking away fluids suc...

Embodiment 3

[0048] In order to further verify the heat dissipation performance of the present invention, the ultra-soft porous material liquid metal composite elastomer and the SEPS elastic material prepared in Example 2 were heated for 5 minutes using a serpentine electric heating wire, and the infrared thermal imager was used to detect the heat dissipation. Observe the cooling process. The observation results are shown in Table 1, and the infrared photos are shown in Table 1. Figure 5 .

[0049] Table 1 Comparison of heat dissipation performance between the present invention and existing SEPS substrate materials

[0050] Heat dissipation 9 s Heat dissipation 13s Cooling 17s Embodiment 2 of the present invention 48℃ 26℃ 22℃ SEPS base material 59℃ 45℃ 40℃

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Abstract

The invention discloses a liquid metal foamy elastomer preparation method and equipment based on negative pressure injection. The preparation method specifically comprises the following steps that a flexible porous substrate is prepared; micropores mutually communicated exist in the flexible porous substrate, and an outer layer of the flexible porous substrate is closed; air in the flexible porous substrate is pumped away, so that the flexible porous substrate is in a negative-pressure contraction state, and the air in the micropores is completely exhausted; and when the flexible porous substrate maintains the original negative-pressure contraction state, liquid metal overcomes resistance and is pushed into the micropores mutually communicated in the flexible porous substrate through external force, and an elastomer is obtained. According to the liquid metal foamy elastomer preparation method based on negative pressure injection, negative pressure and injection are combined, liquid metal overcomes resistance and is pushed into the flexible porous substrate through the external force, the thickness of the substrate has no influence on the preparation process, large flexibility and excellent conductivity are both considered, the application range is wide, preparation is easy, efficiency is high, and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of flexible composite materials, and relates to a method and equipment for preparing a liquid metal foamed elastic body based on negative pressure injection, which can be used to prepare the liquid metal foamed elastic body. Background technique [0002] Liquid metal foam composite elastomers have important applications in the fields of flexible electronic heat dissipation and wearable electronics. Liquid metal, as a good heat-dissipating filler material, has attracted the attention of the industry, and composite heat-conducting materials using liquid metal as a heat-conducting filler have also been developed one after another. However, liquid metal is a liquid with high surface tension. Due to the effect of surface tension, it is difficult to enter into flexible porous composite materials, which makes it difficult to prepare liquid metal foam composite elastomers containing liquid metal. [0003] In Patent...

Claims

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Application Information

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IPC IPC(8): B22D18/06C22C1/08B22D19/00
CPCB22D18/06C22C1/08B22D19/00
Inventor 唐弘尧吕晓洲史尧光姚斌孟祥煜
Owner XIDIAN UNIV