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Liquid metal microparticles with core-shell structures and preparation method and application thereof

A liquid metal, core-shell structure technology, applied in metal processing equipment, nanotechnology, transportation and packaging, etc., can solve problems such as easy re-agglomeration, uneven particle size, poor coating effect, etc., to achieve a wide range of application scenarios, Excellent application prospect, anti-corrosion effect

Inactive Publication Date: 2019-04-05
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is a method for preparing liquid metal microparticles with a core-shell structure and its application, so as to solve the problem of complex methods, uneven particle sizes, and poor coating effect of preparing liquid metal microparticles with a core-shell structure in the prior art. Especially the technical issues of easy reunion

Method used

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  • Liquid metal microparticles with core-shell structures and preparation method and application thereof
  • Liquid metal microparticles with core-shell structures and preparation method and application thereof
  • Liquid metal microparticles with core-shell structures and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] A method for preparing liquid metal microparticles with a core-shell structure, comprising the steps of:

[0038] 1) Take 250g of tetrahydrofuran and 50g of polyvinyl chloride powder and place them in a 500ml beaker, stir for 30min with a mechanical stirrer, and the stirring speed is 300rpm to make a polymer solution;

[0039] 2) 20g liquid metal (Ga 75.5 In 24.5 ) into the polymer solution in step 1), placed in a vortex mixer that can spontaneously generate mechanical vibration, and oscillated for 45 minutes;

[0040] 3) Pass the polymer solution mixed with the liquid metal through a filter membrane with a particle size of 150 nm, and extrude it into water. At this time, the polymer solution will solidify when it meets water, thereby covering the liquid metal core, so that liquid metal micro-droplets with a uniform particle size and a core-shell structure can be obtained.

[0041] Basic principle: the addition of polyvinyl chloride not only increases the viscosity o...

Embodiment 2

[0045] A method for preparing liquid metal microparticles with a core-shell structure, specifically comprising the following steps:

[0046] 1) Place 250g of methylpyrrolidone and 50g of polyvinylidene fluoride powder in a 500ml beaker, stir for 30min with a mechanical stirrer at a stirring speed of 300rpm, and obtain a polymer solution;

[0047] 2) 20g liquid metal (Ga 75.5 In 24.5 ) was dropped into the polymer solution prepared in step 1), and stirred for 15 minutes at a speed of 300 rpm using a magnetic stirrer;

[0048] 3) Extrude the above-mentioned organic mixed solution mixed with the liquid metal into water through a filter membrane with a particle size of 300 nm. At this time, the organic mixed solution will solidify when it encounters water, thereby wrapping the liquid metal core, so that liquid metal micro-droplets with a uniform particle size and a core-shell structure can be obtained.

[0049] The diameter of the liquid metal with a core-shell structure prepar...

Embodiment 3

[0051] A method for preparing liquid metal microparticles with a core-shell structure, specifically comprising the following steps:

[0052] 1) Put 250g of N,N-dimethylformamide and 50g of polyethylene powder in a 500ml beaker, stir for 30min with a mechanical stirrer at a stirring speed of 300rpm, and obtain a polymer solution;

[0053] 2) 20g liquid metal Ga 75.5 In 24.5 ) into the polymer solution in step 1), placed in an ultrasonic disperser, and ultrasonicated for 10 minutes in normal mode;

[0054] 3) Extrude the above-mentioned organic mixed solution mixed with liquid metal into water through an alumina template with a particle size of 200 nm. At this time, the organic mixed solution will solidify when it encounters water, thereby wrapping the liquid metal core, so that liquid metal micro-droplets with a uniform particle size and a core-shell structure can be obtained.

[0055] The diameter of the liquid metal microparticles with a core-shell structure prepared in th...

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Abstract

The invention relates to liquid metal microparticles with core-shell structures and a preparation method and application thereof. Each liquid metal microparticle comprises a core formed by liquid metal and a shell completely wrapping the outer layer of the core, wherein the shell is prepared from an organic high-molecular polymer. The preparation method comprises the steps that the organic high-molecular polymers are dissolved in an organic solvent to form a polymer solution; liquid metal is dropwise added into the polymer solution to disperse the polymer solution into micro-nano particles; and the micro-nano particles are extruded into water through a micropore structure, and thus the liquid metal microparticles with the core-shell structures are obtained after standing. The preparation method of the liquid metal microparticles is convenient and rapid, the sizes of the prepared microparticles can reach the nanometer grade and are uniform and stable, and the problem that the liquid metal microparticles can coagulate again is completely solved. The liquid metal microparticles with the core-shell structures can be quickly prepared in a large scale, and the liquid metal microparticleswith the core-shell structures can be applied to the fields of phase-change microcapsules, nanometer fluids, drug-carrying robots and the like and have excellent application prospects at the industrialization aspect.

Description

technical field [0001] The invention relates to the technical field of liquid metal microparticles, in particular to a liquid metal microparticle with a core-shell structure and a preparation method and application thereof. Background technique [0002] Gallium-based liquid metals at room temperature are attracting extensive attention due to their low melting point, excellent electrical and thermal conductivity, flowability, and non-toxicity. Micro-nano-scale liquid metal combines the dual advantages of liquid metal and micro-nano scale, and has made some progress in the fields of micro-nano drug-loaded robots, micro-nano sensors, micro-nano fluid heat transfer, and microfluidics. In addition, due to its unique structural characteristics, the core-shell structure integrates the properties of the inner and outer materials and complements each other's shortcomings. It has become an important research direction in the scientific community in recent years. More importantly, sub...

Claims

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Application Information

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IPC IPC(8): B22F9/08B22F1/02B22F1/00B82Y40/00
CPCB82Y40/00B22F9/08B22F1/054B22F1/16
Inventor 陈森刘静
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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