Liquid metal with porous structure and preparation method of liquid metal

A liquid metal and porous structure technology, applied in the field of flexible electronics, can solve the problems of increased cost, reduced stability, liquid metal failure, etc., and achieve the effect of not easy to oxidize, good air permeability, high thermal conductivity and electrical conductivity

Active Publication Date: 2021-07-20
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the introduction of high-melting point metal particles can increase the adhesion, it will increase the cost, and at the same time, it will chemically react with the metal to form an intermetallic alloy, which will make the liquid metal invalid and reduce its stability.

Method used

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  • Liquid metal with porous structure and preparation method of liquid metal
  • Liquid metal with porous structure and preparation method of liquid metal
  • Liquid metal with porous structure and preparation method of liquid metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] In this example, if figure 1 As shown, fix the three-necked flask 2 on the magnetic stirrer 1, close the outlet pipe 3, connect the inlet pipe 4 with the nitrogen cylinder 7 by using the air guide pipe 8, and check the airtightness. Add gallium-indium alloy 5 and magnetron 6, remove the air and water in the three-necked bottle, start stirring, and prepare porous liquid metal;

[0040] The specific method is as follows:

[0041] Step 1: Fix the three-necked bottle on the top of the magnetic stirrer, connect the middle and right ports to the air outlet pipe and the air inlet pipe respectively, and seal and fix it with a raw material tape, and seal the left port with a rubber stopper. Close the air outlet pipe, open the air inlet pipe, and check the air tightness;

[0042] Step 2: Weigh 2g of eutectic gallium indium alloy into a 50mL reactor, select a 2cm magnetic stirring bar and put it into the reactor. Open the valve of the nitrogen cylinder and the gas outlet pipe, ...

Embodiment 2

[0047] Step 1: Fix the three-neck bottle above the magnetic stirrer, connect the outlet pipe and the air inlet pipe to the gas cylinder at the middle port and the right port respectively, seal and fix it with a raw material tape, and seal the left port with a rubber stopper. Close the air outlet pipe, open the air inlet pipe, and check the air tightness;

[0048] Step 2: Weigh 500g of eutectic gallium-indium alloy into a 1000mL reactor, and select a mechanical stirrer for stirring. Open the valve of the nitrogen cylinder and the gas outlet pipe, and pass in nitrogen for 2 hours to remove the air and moisture in the three-necked bottle and pipeline;

[0049] Step 3: Under the protection of nitrogen, turn on the stirring, adjust the stirring rate to 300rpm, the magnet rotates at a constant speed, and a vortex is formed in the liquid metal;

[0050] Step 4: After continuous stirring for 12 hours, the liquid metal became viscous. Turn off the magnetic stirrer and close the nitro...

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Abstract

The invention discloses a preparation method of liquid metal with a porous structure. The preparation method comprises the following steps: (1) adding the liquid metal into a reaction container, and then connecting a stirring device; and (2) charging continuous inert gas into the reaction container to remove air and moisture in the container, adjusting the pressure in the container to be 0.3-0.8 MPa, at the same time, performing stirring, wherein the stirring time is 0.5-24 h, and the stirring speed is 100-1500 rpm, and obtaining the liquid metal with the porous structure. The preparation method disclosed by the invention is simple, efficient, green and pollution-free. The invention further discloses a metal material with a porous structure, prepared by the preparation method of the liquid metal with the porous structure. The metal material with the porous structure disclosed by the invention is relatively high in viscosity and relatively high in chemical stability.

Description

technical field [0001] The invention belongs to the field of flexible electronics, and in particular relates to a liquid metal with a porous structure and a preparation method thereof. Background technique [0002] Liquid metals generally refer to metals that can still maintain a liquid state at room temperature. Traditionally, there is mercury, but its toxicity limits its application. It appears as a solid metal at low temperature and as a liquid at room temperature or high temperature. Liquid metals are usually mainly gallium metal and its alloys, including gallium indium alloy and gallium indium tin alloy, etc., which have good electrical and thermal conductivity, as well as metallic luster, and have good fluidity and surface tension in a liquid state and other characteristics. [0003] Because of good room temperature flow deformability, high electrical conductivity, high thermal conductivity, and high boiling point, liquid metals have great practical value in the field...

Claims

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Application Information

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IPC IPC(8): C22C1/08C22C28/00
CPCC22C1/08C22C28/00C22C1/086
Inventor雷文娟刘宜伟李润伟
OwnerNINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI