Graphene and liquid metal composite material and preparation method thereof

A technology of liquid metal and graphene, which is applied in the field of graphene and liquid metal composite materials and its preparation, can solve the problems of complex preparation process, low sample repeatability, and low plastic phase strength, and achieve broad application prospects and plasticity. Improve the effect of simple process

Inactive Publication Date: 2015-08-12
GUANGDONG JANUS SMART GRP CO LTD +1
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  • Abstract
  • Description
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Problems solved by technology

[0003] Although liquid metal has many excellent properties due to its special structure; but some of its own weaknesses are also very obvious. Liquid metal material has a defect similar to glass material---brittleness, which greatly reduces its plasticity, which also limits its practical application
Due to its special structure, liquid metal does not produce various deformation mechanisms to resist deformation when it is subjected to external loads, so when the stress reaches the breaking strength, it will suddenly break, resulting in accidents and serious accidents. Restricts the application and promotion of liquid metal in the field of high-performance materials
[0004] At present, the known liquid metal shaping enhancement technology can improve the plasticity of liquid metal to a certain extent; however, its shortcomings are also very obvious: first, the preparation process is complicated, and the repeatability of the sample is low; second, because the composite plastic phase The strength is lower than that of the amorphous matrix, which leads to a decrease in the strength of the material. While the plasticity is improved, the mechanical strength that the material should have is sacrificed.

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  • Graphene and liquid metal composite material and preparation method thereof
  • Graphene and liquid metal composite material and preparation method thereof

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preparation example Construction

[0024] In some embodiments, the preparation method of graphene and liquid metal composite material may comprise the following steps:

[0025] 1) Provide graphene: it can be graphene prepared by various physical and chemical methods, such as single-layer graphene, double-layer graphene and multi-layer graphene with more than 3 layers; preferably, graphene is prepared with liquid metal Before the composite material is dispersed, the graphene surface can be modified and dispersed by physical or chemical methods, such as silane coupling agent surface modification, ethanol ultrasound, electrochemical modification, etc.

[0026] 2) Provide liquid metal: it can be one of zirconium-based liquid metal, magnesium-based liquid metal, copper-based liquid metal, aluminum-based liquid metal, iron-based liquid metal, nickel-based liquid metal, titanium-based liquid metal, preferably its vitrification The temperature is higher than the crystallization temperature by 18°C ​​or more.

[0027] ...

Embodiment 1

[0031] 1) Provide single-layer graphene through pre-dispersion treatment; before graphene and liquid metal are prepared as a composite material, dispersion treatment is carried out, and modification and dispersion are carried out by a silane coupling agent.

[0032] 2) Provide liquid metal; this time, zirconium-based liquid metal is used, and the glass transition temperature is 18°C ​​higher than the crystallization temperature.

[0033] 3) Add 5 parts of pretreated graphene to 100 parts of liquid metal, put it into a vacuum melting furnace, and first vacuum the furnace to make the vacuum degree reach 10 -3 -10 -2 Pa, start the induction heating, the heating power is 50KW, under the protection of 99.99% argon, carry out high-temperature melting, the melting temperature is 2500 ° C, and the melting time is 1 hour; the above melting process can be repeated 3 times, so that the graphene and zirconium-based liquid The metals are fully mixed with each other to form a molten body. ...

Embodiment 2

[0037] 1) Provide single-layer graphene through pre-dispersion treatment; before graphene and liquid metal are prepared as a composite material, dispersion treatment is carried out, and modification and dispersion are carried out by a silane coupling agent.

[0038] 2) Provide liquid metal; this time, magnesium-based liquid metal is used, and the glass transition temperature is 25°C higher than the crystallization temperature.

[0039] 3) Add 7.5 parts of pretreated graphene to 100 parts of liquid metal, put it into a vacuum melting furnace, and first vacuum the furnace to make the vacuum degree reach 10 -3 -10 -2 Pa, start the induction heating, the heating power is 30KW, under the protection of 99.99% argon, carry out high-temperature melting, the melting temperature is 1300 ° C, and the melting time is 1.5 hours; the above melting process can be repeated 3 times, so that graphene and magnesium-based liquid metal Mix well with each other to form a melt.

[0040] 4) Using t...

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Abstract

The invention discloses a graphene and liquid metal composite material and a preparation method thereof, the graphene and liquid metal composite material is prepared by the following method: 5-20 in parts by weight of graphene and 100 in parts by weight of liquid metal are put into a vacuum melting furnace with the vacuum degree reaching to 10<-3> to10<-2> for high temperature melting under the inert gas protection for full mutual mixing of the graphene and the liquid metal into a melting body; then by use of suction-casting means, the melting body is sucked into a shape-structural mold with a cooling system for fast cooling of the melting body to form the graphene plasticized liquid metal. The liquid metal plastic property can be significantly improved, and good mechanical strength can be kept.

Description

technical field [0001] The invention relates to a composite material of graphene and liquid metal and a preparation method thereof. Background technique [0002] Due to its own special microstructure, liquid metal has excellent performance such as high strength, good scratch resistance, high gloss, etc., which meets the requirements for the use of structural parts of 3C electronic products, and has great application potential and market development prospects . [0003] Although liquid metal has many excellent properties due to its special structure; but some of its own weaknesses are also very obvious. Liquid metal material has a defect similar to glass material---brittleness, which greatly reduces its plasticity, which also limits its practical application. Due to its special structure, liquid metal does not produce various deformation mechanisms to resist deformation when it is subjected to external loads, so when the stress reaches the breaking strength, it will suddenl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10
Inventor 邓崇浩王长明谢守德曾燮榕赖愈华王其武
Owner GUANGDONG JANUS SMART GRP CO LTD
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