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Preparation method and equipment of liquid metal foamed elastomer based on negative pressure injection

A liquid metal, foam-like technology, which is applied in the field of preparing liquid metal foam-like elastomers, can solve the problems such as passages that are not formed together, and achieve the effects of low cost, excellent electrical conductivity and high flexibility

Active Publication Date: 2022-07-29
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Preparation method and equipment of liquid metal foamed elastomer based on negative pressure injection
  • Preparation method and equipment of liquid metal foamed elastomer based on negative pressure injection
  • Preparation method and equipment of liquid metal foamed elastomer based on negative pressure injection

Examples

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Effect test

Embodiment 1

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

[0032] S1, prepare 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, the air inside the flexible porous substrate 6 is pumped away, 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 shrinkage state, the liquid metal is pushed into the interconnected micropores inside the flexible porous substrate 6 through an external force against resistance.

Embodiment 2

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

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

[0038] The vacuum pump 1 is use...

Embodiment 3

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

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

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

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PUM

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Abstract

The invention discloses a method and equipment for preparing a liquid metal foamed elastomer based on negative pressure injection. The preparation method specifically includes: preparing a flexible porous substrate; interconnecting micropores inside the flexible porous substrate, and an outer layer of the flexible porous substrate. Closed; the air inside the flexible porous substrate is drawn away, so that the flexible porous substrate is in a negative pressure contraction state, and the gas in the micropores is completely discharged; when the flexible porous substrate maintains the original negative pressure contraction state, the liquid metal is pushed into the flexible porous substrate against the resistance by external force It is obtained in the interconnected micropores inside the flexible porous substrate. The invention provides a method for preparing a liquid metal foamed elastomer based on negative pressure injection. The negative pressure and injection are combined, and the liquid metal is pushed into the flexible porous substrate against resistance by external force. The thickness of the substrate has no influence on the preparation process, and both Great flexibility and excellent electrical conductivity, wide application range, simple preparation, high efficiency and low cost.

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 elastomer based on negative pressure injection, which can be used for preparing a liquid metal foamed elastomer. Background technique [0002] Liquid metal foam composite elastomers have important applications in the field of flexible electronic heat dissipation and wearable electronics. As a good heat-dissipating filler material, liquid metal has attracted the attention of the industry, and composite thermally conductive materials using liquid metal as thermally conductive fillers 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-like composite elastomers containing liquid metal. [0003] In...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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