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Liquid metal/polymer composite material and its preparation method and electronic device

A technology of liquid metal and composite materials, applied in the direction of conductive materials dispersed in non-conductive inorganic materials, electrical components, cables/conductors, etc., can solve the problems of no good conductive path, low conductivity of composite materials, high cost of use, etc. , to achieve the effect of good connectivity between frames, simple operation and low cost

Active Publication Date: 2021-05-28
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is a method of directly mixing liquid metal and liquid silicone rubber sol to prepare composite materials. Since the liquid metal particles are easily separated by highly insulating silicone rubber, the resulting composite material is prone to the problem of not having a good conductive path. , resulting in a lower electrical conductivity of the composite
Some researchers also used the method of filling liquid metal into three-dimensional polyurethane sponge material to prepare composite materials. Since the surface tension of the liquid alloy is between 0.5 and 0.6 N / m 2 Within the range, it tends to be attached to the skeleton of the sponge foam as spherical particles in the sponge foam. Only when the liquid alloy content is high can an effective conductive path be formed, and the high content of the liquid alloy is easy to block the interconnected Pores, leading to the problem of forming closed pores In addition, the performance of the composite material prepared by this method depends on the three-dimensional polyurethane sponge material and the use cost is high

Method used

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  • Liquid metal/polymer composite material and its preparation method and electronic device
  • Liquid metal/polymer composite material and its preparation method and electronic device
  • Liquid metal/polymer composite material and its preparation method and electronic device

Examples

Experimental program
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Effect test

Embodiment 1

[0030] This embodiment provides a liquid metal / polymer composite material, using sugar particles as a template material, the liquid metal is a gallium indium eutectic alloy with a melting point of 15°C, and the polymer is a silicone elastomer (Ecoflex00-30). The specific implementation The process is as follows:

[0031] (1) Preparation of sugar block template: using commercially available sugar granules as raw materials, mix sugar granules and deionized water at a mass ratio of 10: (1-2), and stir evenly. Use a press to apply a uniaxial pressure of 50-200MPa to the granules, keep the pressure for 5-20 minutes, and then unload the pressure to obtain a candy with hand-held mechanical properties, and sinter the candy at 60-80°C for 12-20 hours to obtain a candy template.

[0032] (2) Preparation of gallium-indium eutectic alloy: heat and melt Ga and In at 30-200°C respectively, then mix the two evenly according to the mass ratio Ga / In=75:25, and obtain gallium with a melting po...

Embodiment 2

[0039] This embodiment provides a liquid metal / polymer composite material. Sugar particles are used as template materials. The liquid metal is a gallium indium tin eutectic alloy with a melting point of 10°C. The polymer is a silicone elastomer (Ecoflex00-30). The implementation process is as follows:

[0040] (1) Preparation of sugar block template: using commercially available sugar granules as raw materials, mix sugar granules and deionized water at a mass ratio of 10: (1-2), and stir evenly. Use a press to apply a uniaxial pressure of 50-200MPa to the granules, keep the pressure for 5-20 minutes, and then unload the pressure to obtain a candy with hand-held mechanical properties, and sinter the candy at 60-80°C for 12-20 hours to obtain a candy template.

[0041] (2) Preparation of gallium indium tin eutectic alloy: heat and melt Ga, In and Sn at 30-300°C respectively, then mix the three evenly according to the mass ratio Ga / In / Sn=62:22:16, after cooling, A gallium-indiu...

Embodiment 3

[0045] This embodiment provides a liquid metal / polymer composite material, using sodium chloride particles as the template material, the liquid metal is gallium metal with a melting point of 29.6°C, and the polymer is silica gel elastomer (Ecoflex00-30). The specific implementation process as follows:

[0046] (1) Preparation of sodium chloride block template: using commercially available sodium chloride granules as raw material, mix sodium chloride granules and deionized water at a mass ratio of 10: (3-5), and stir evenly. Use a press to apply a uniaxial pressure of 100-200 MPa to the particles, keep the pressure for 20-30 minutes, and then unload the pressure to obtain a sodium chloride block with hand-held mechanical properties, and sinter the sodium chloride block at 100-150 ° C for 24-32 hours, Thereby obtaining a sodium chloride block template.

[0047] (2) Preparation of gallium metal: heating and melting Ga at 50-300°C respectively to obtain gallium metal with a melti...

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Abstract

The invention discloses a liquid metal / polymer composite material, a preparation method thereof, and an electronic device. The preparation method of the liquid metal / polymer composite material comprises the following steps: (1) taking template material particles and molding the template material particles to form a template; (2) taking the template and immersing it in the liquid metal, so that the liquid metal fills the pores of the template to form a liquid-filled template; (3) cooling the liquid-filled template to solidify the liquid metal, dissolving and removing the template, and obtaining Solid three-dimensional metal network structure; (4) immersing the solid three-dimensional metal network structure in a solution containing polymer raw materials, and treating the polymer material to solidify to form a polymer, and the solid three-dimensional metal network structure is in a liquid state. The method of the invention is simple in operation and low in cost, and the prepared liquid metal / polymer composite material has excellent electrical conductivity and has good application prospects in electronic devices.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a liquid metal / polymer composite material, a preparation method thereof, and an electronic device. Background technique [0002] The fifth-generation mobile communication and Internet of Things technology will realize the interconnection of all things through wireless communication. Among them, wireless communication transmits and shares information through radiation and receiving electromagnetic waves, which will make electromagnetic interference and pollution more and more serious. On the one hand, electromagnetic radiation is not only potentially harmful to human health, but also seriously interferes with the functions of other electronic devices. On the other hand, electromagnetic waves are the carrier of information, and electromagnetic radiation may cause the leakage of people's privacy and confidential information, and pose challenges to information security. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/22H01B13/00C22C1/08C08K3/08C08L83/04
CPCH01B1/22H01B13/00C22C1/08C08K3/08C08L2201/04C08K2201/001C08L2203/20C22C1/082C08L83/04
Inventor 汪宏姚斌徐信未
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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