High-thermal-conductivity flexible heat pipe of graphene-coated carbon nanotube aerogel and preparation method of high-thermal-conductivity flexible heat pipe

A technology of graphene coating and carbon nanotubes, which is applied in the direction of airgel preparation, chemical instruments and methods, electrical components, etc., can solve the problems of weather resistance and low thermal conductivity, and achieve high-efficiency heat dissipation, strong capillary force, effective Good for heat dissipation

Pending Publication Date: 2021-12-24
CHANGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem of the present invention is to provide a flexible heat pipe with high thermal conductivity of graphene-coated carbon nanotube airgel and its preparation method for the weight, weather resistance and low thermal conductivity of traditional metal-based heat pipe materials.

Method used

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  • High-thermal-conductivity flexible heat pipe of graphene-coated carbon nanotube aerogel and preparation method of high-thermal-conductivity flexible heat pipe
  • High-thermal-conductivity flexible heat pipe of graphene-coated carbon nanotube aerogel and preparation method of high-thermal-conductivity flexible heat pipe
  • High-thermal-conductivity flexible heat pipe of graphene-coated carbon nanotube aerogel and preparation method of high-thermal-conductivity flexible heat pipe

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Effect test

example 1

[0032] A new type of graphene-coated carbon nanotube airgel flexible heat pipe with high thermal conductivity. First, prepare carbon nanotube airgel with regular microporous channels as a liquid-absorbing core, and then wrap graphene film on carbon nanotubes The airgel liquid-absorbing core, finally injects the ethanol solution into the carbon nanotube-graphene flexible heat pipe, and vacuumizes and seals it, which specifically includes the following steps:

[0033] The first step is to prepare carbon nanotube airgel with regular microporous channels as a liquid-absorbing core:

[0034] By adding H 2 SO 4 and H 2 o 2 The solutions were mixed at a volume ratio of 3:1 to prepare H 2 SO 4 / H 2 o 2 mixture. Soak the CNT film in the solution for 1 hour;

[0035] Wash the airgel several times in deionized water until the pH value reaches 7, and then dry it in an oven at 100°C for 12 hours;

[0036] Hydrophilic treatment on the surface of carbon nanotube aerogel: place the ...

example 2

[0040] A new type of graphene-coated carbon nanotube airgel flexible heat pipe with high thermal conductivity. First, prepare carbon nanotube airgel with regular microporous channels as a liquid-absorbing core, and then wrap graphene film on carbon nanotubes The airgel liquid-absorbing core, finally injects the ethanol solution into the carbon nanotube-graphene flexible heat pipe, and vacuumizes and seals it, which specifically includes the following steps:

[0041] The first step is to prepare carbon nanotube airgel with regular microporous channels:

[0042] By adding H 2 SO 4 and H 2 o 2 The solutions were mixed at a volume ratio of 4:1 to prepare H 2 SO 4 / H 2 o 2 mixture. Soak the CNT film in the solution for 2 hours;

[0043] Wash the airgel several times in deionized water until the pH value reaches 7, and then dry it in an oven at 100°C for 12 hours;

[0044]Hydrophilic treatment on the surface of carbon nanotube aerogel: place the foamed carbon nanotube aero...

example 3

[0048] A new type of graphene-coated carbon nanotube airgel flexible heat pipe with high thermal conductivity. First, prepare carbon nanotube airgel with regular microporous channels as a liquid-absorbing core, and then wrap graphene film on carbon nanotubes The airgel liquid-absorbing core, finally injects the ethanol solution into the carbon nanotube-graphene flexible heat pipe, and vacuumizes and seals it, which specifically includes the following steps:

[0049] The first step is to prepare carbon nanotube airgel with regular microporous channels as a liquid-absorbing core: by adding H 2 SO 4 and H 2 o 2 The solutions were mixed at a volume ratio of 5:1 to prepare H 2 SO 4 / H 2 o 2 mixture. Soak the CNT film in the solution for 3 hours;

[0050] Wash the airgel several times in deionized water until the pH value reaches 7, and then dry it in an oven at 100°C for 12 hours;

[0051] Hydrophilic treatment on the surface of carbon nanotube aerogel: place the foamed ca...

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Abstract

The invention relates to the technical field of graphene, in particular to a high-thermal-conductivity flexible heat pipe of graphene coated carbon nanotube aerogel and a preparation method of the high-thermal-conductivity flexible heat pipe. According to the high-thermal-conductivity flexible heat pipe with the graphene-coated carbon nano tube aerogel, foamed carbon nano tube aerogel serves as a liquid absorption core, the foamed carbon nano tube aerogel is of a regular micropore pipeline structure, back-and-forth transmission of working liquid is accelerated through capillary force generated by a micropore pipeline, the outer side is coated with a graphene film, and the overall mechanical performance of the flexible heat pipe is improved. Compared with a traditional metal heat pipe material, the carbon nano tube and the graphene are lighter, good stability is achieved, the corrosion risk under acid, alkali and humidity exposure is better than that of a metal-based material, and the thermal conductivity is far higher than that of a traditional metal material.

Description

technical field [0001] The invention relates to a high heat conduction flexible heat pipe, in particular to a graphene-coated carbon nanotube airgel high heat conduction flexible heat pipe and a preparation method thereof. Background technique [0002] Today, the power density of integrated circuits can reach 1000Wm 2 above. Therefore, efficient cooling is critical to maintaining the performance and extending the life of electronic and power systems. For example, heat pipes, a two-phase flow cooling device, have attracted considerable attention due to their high efficiency and unique ability to transfer heat over long distances with minimal losses. Today, heat pipes are mainly made of metals with high thermal conductivity and good mechanical strength, such as copper, aluminum or their alloys. However, with the development of terrestrial and portable electronics, traditional metals may no longer be the best choice, as lightweighting has become a top priority for these appl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L23/427C01B32/168C01B32/194B01J13/00
CPCH01L23/427C01B32/168C01B32/194B01J13/0091
Inventor 弓晓晶王成全潘栋杰
Owner CHANGZHOU UNIV
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