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Liquid metal functional composite film and preparation method thereof

A technology of liquid metal and composite thin film, which is applied in the direction of solar thermal power generation, etc., can solve problems such as inability to endow composite materials with photothermal conversion performance, achieve excellent photothermal performance and shielding performance, simple method, and simple manufacturing process.

Pending Publication Date: 2022-05-24
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent document CN111070833A discloses a high thermal conductivity electromagnetic shielding composite material and its preparation method. Sheet-like thermal conductivity fillers and liquid metal fillers are added to the polymer matrix to endow the polymer with thermal conductivity and electromagnetic shielding properties, but this invention cannot endow the composite The light-to-heat conversion performance of the material, and the shielding performance will not or will not decrease after stretching

Method used

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  • Liquid metal functional composite film and preparation method thereof
  • Liquid metal functional composite film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A preparation method of a liquid metal functional composite film, comprising the following steps:

[0029] (1) Weigh 5g of polyvinyl alcohol powder and 0.2g of sodium alginate as a surface modifier, add it to a beaker containing 100ml of deionized water, and heat it in an oil bath at 95°C for 2 hours to obtain an aqueous solution of polyvinyl alcohol-sodium alginate .

[0030] (2) Weigh 3 g of gallium-indium alloy, add the prepared polyvinyl alcohol-sodium alginate aqueous solution, and ultrasonicate for 5 minutes at 6 KHz to form liquid metal droplets wrapped by sodium alginate to obtain a liquid metal-polyvinyl alcohol solution.

[0031] (3) The liquid metal-polyvinyl alcohol solution was introduced into the prepared mold of 50mm×50mm×4mm, after flat casting, the solvent was evaporated at room temperature of 25°C for 24h, and the liquid metal functional film 1 was obtained after curing.

Embodiment 2

[0033] For the preparation method of the liquid metal functional film in this embodiment, refer to Example 1, the difference is only that in step (2) "weigh 4 g of gallium indium alloy" to obtain the liquid metal functional film 3 .

Embodiment 3

[0035] The preparation method of the liquid metal functional film in this embodiment refers to Example 1, and the difference is only that in step (2) "weigh 5 g of gallium indium alloy" to obtain the liquid metal functional film 3 .

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Abstract

The invention discloses a liquid metal functional composite film and a preparation method thereof.The film structurally comprises a polymer macromolecule layer with the thickness ranging from 80 micrometers to 120 micrometers, a plurality of liquid metal in the shape of liquid drops is embedded in a thickness layer, 20 micrometers to 40 micrometers away from the surface, of one surface of the polymer macromolecule layer, the particle size of the liquid drops ranges from 500 nm to 2 micrometers, and the particle size of the liquid metal ranges from 500 nm to 2 micrometers. The content of the liquid metal in the composite film is 30-60 wt%. The preparation method of the composite film comprises the following steps: dispersing liquid metal in a polymer precursor solution; and the dispersion liquid is subjected to film forming treatment, and the liquid metal functional composite film is obtained. The prepared composite film has excellent photo-thermal conversion performance and electromagnetic shielding performance at the same time, the shielding performance of the composite film can be regulated and controlled through stretching, the preparation method is simple and efficient, and the composite film can be widely applied to the fields of communication base stations, electronic device thermal management and the like.

Description

technical field [0001] The invention belongs to the field of functional composite films, in particular to a liquid metal functional composite film and a preparation method thereof. Background technique [0002] In recent years, the development of electronic devices has shown a trend of high density and high integration. When using electronic equipment in low temperature and cold areas, it is necessary to solve the problems that the electrical performance and stable performance of electronic components are affected by the low temperature, and even lead to abnormal operation or failure of electronic components. Operate at a suitable temperature; at the same time, it is necessary to minimize the electromagnetic interference between different electronic components, and the film with electromagnetic shielding performance can ensure its normal operation. Equipment operation is very necessary. [0003] At present, photothermal films and shielding films have been reported separate...

Claims

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Application Information

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IPC IPC(8): C08L29/04C08L5/04C08K3/08C08J5/18
CPCC08J5/18C08J2329/04C08J2405/04C08K3/08Y02E10/40
Inventor 张献杜宇航丁欣肖超王艳艳郑康刘香兰田兴友
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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