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A kind of high thermal conductivity transparent flexible composite film and preparation method thereof

A composite film and high thermal conductivity technology, applied in the field of high thermal conductivity transparent flexible composite film and its preparation, can solve the problems of low thermal conductivity, shorten the service life of electronic components, and the heat of electronic components is not easy to dissipate, etc. Thermal conductivity, effect of apparent light transparency

Active Publication Date: 2022-01-25
SHANGHAI MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polymer materials are widely used in the field of electronic appliances due to their light weight, easy processing, excellent mechanical properties and electrical insulation properties. However, most polymer materials have low thermal conductivity, which makes the heat in electronic components difficult to dissipate. The service life of electronic components is greatly reduced, how to effectively solve the heat dissipation problem of high-power electronic components has become an urgent problem to be solved
Although many studies have also been devoted to the thermal conductivity of polymer materials, some metal oxides, nitrides and carbides have been found as fillers to modify the polymer matrix, but these materials cannot be optically transparent and insulating at the same time, it is difficult Used in displays, wearable devices, sensors and LED lights

Method used

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  • A kind of high thermal conductivity transparent flexible composite film and preparation method thereof
  • A kind of high thermal conductivity transparent flexible composite film and preparation method thereof
  • A kind of high thermal conductivity transparent flexible composite film and preparation method thereof

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preparation example Construction

[0019] Such as figure 1 As shown, the present invention provides a kind of high thermal conductivity transparent flexible composite film and preparation method thereof, specifically comprising the following steps:

[0020] (1) Adding absorbent cotton to 80% concentrated sulfuric acid to prepare cellulose nanoparticles.

[0021] (2) Weigh polyvinyl alcohol with a mass ratio of 1 / 3-3 / 1 to the cellulose nanocrystalline particles, and measure 200 ml of deionized water with a beaker.

[0022] (3) Add the weighed polyvinyl alcohol and cellulose nanoparticles into 200ml of deionized water respectively, and after fully stirring for 15 minutes, a transparent and uniform aqueous solution is formed and then poured into the matrix container.

[0023] (4) Heat and evaporate the prepared solution at a temperature of 80-90° C. for 3-4 hours, and then completely dehydrate the water.

[0024] (5) Take out the dried mixture from the base container and put it into a hot press for hot pressing ...

Embodiment 1

[0027] (1) Adding absorbent cotton to 80% concentrated sulfuric acid to prepare cellulose nanoparticles.

[0028] (2) Weigh 1 g of cellulose nanoparticles and 3 g of polyvinyl alcohol, and measure 200 ml of deionized water with a beaker.

[0029] (3) Add 3 g of polyvinyl alcohol and 1 g of cellulose nanoparticles weighed into 200 ml of deionized water respectively, and after fully stirring for 15 min, a transparent and uniform aqueous solution is formed and then poured into a matrix container.

[0030] (4) Heat and evaporate the prepared solution at a temperature of 90° C. for 3.5 hours to completely dehydrate the water.

[0031] (5) Take out the dried mixture in the matrix container and put it into a hot press for hot pressing to form a flexible composite film with a thickness of 40 μm.

Embodiment 2

[0033] (1) Adding absorbent cotton to 80% concentrated sulfuric acid to prepare cellulose nanoparticles.

[0034] (2) Weigh 2 g of cellulose nanoparticles and 2 g of polyvinyl alcohol, and measure 200 ml of deionized water with a beaker.

[0035] (3) Add weighed 2g of polyvinyl alcohol and 2g of cellulose nanoparticles into 200ml of deionized water respectively, and after fully stirring for 15 minutes, a transparent and uniform aqueous solution is formed and then poured into the matrix container.

[0036] (4) Heat and evaporate the prepared solution at a temperature of 90° C. for 3.5 hours to completely dehydrate the water.

[0037] (5) Take out the dried mixture in the matrix container and put it into a hot press for hot pressing to form a flexible composite film with a thickness of 40 μm.

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Abstract

The invention discloses a high thermal conductivity transparent flexible composite film and a preparation method thereof. The preparation method comprises the following steps: respectively adding polyvinyl alcohol and cellulose nanoparticles into deionized water, fully stirring and evaporating, and dehydrating the water completely. The heat-pressing treatment is carried out to prepare a transparent and flexible composite film with high thermal conductivity. Compared with other thermal conductive fillers such as carbon materials and metal fillers, the composite film prepared by adding cellulose nanoparticles to polyvinyl alcohol has obvious light transparency and will not change the insulation of raw materials , to a certain extent overcome the limitations of the use of electronic devices, and play a certain role in promoting the development of transparent and flexible electronic materials.

Description

technical field [0001] The invention relates to the technical field of polymer heat-conducting composite materials, in particular to a high-heat-conducting transparent flexible composite film and a preparation method thereof. Background technique [0002] With the development of integration technology, microelectronics technology and high-power LED technology, the volume of electronic components and logic circuits has shrunk sharply. Under high-frequency working environment, the heat generated by electronic components is easy to accumulate rapidly. Polymer materials are widely used in the field of electronic appliances due to their light weight, easy processing, excellent mechanical properties and electrical insulation properties. However, most polymer materials have low thermal conductivity, which makes the heat in electronic components difficult to dissipate. The service life of electronic components is greatly reduced, and how to effectively solve the heat dissipation pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L29/04C08L1/02C08J5/18
CPCC08J5/18C08J2329/04C08J2401/02C08J2301/02C08J2429/04
Inventor 高缘吴新锋王瑛赵远涛李文戈赵忠贤姜涛李强张淼
Owner SHANGHAI MARITIME UNIVERSITY
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