Preparation method of enhanced cooling carbon based composite film

A production method and composite film technology, which are applied in cooling/ventilation/heating transformation, modification by conduction heat transfer, etc., can solve the problems of heat source dissipation, poor surface thermal conductivity, etc., and achieve better heat dissipation performance, easy combination, Simple craftsmanship

Inactive Publication Date: 2019-09-10
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor surface thermal conductivity of coating A, and the heat sources on electronic devices are mostly point heat sources, in order to dissipate the heat source as soon as possible, the point heat source must be quickly spread to the entire plane

Method used

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  • Preparation method of enhanced cooling carbon based composite film
  • Preparation method of enhanced cooling carbon based composite film
  • Preparation method of enhanced cooling carbon based composite film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. The mass ratio of the three is required to be: drug B: acetone: deionized water = 1:8:1. So weigh 6.25 grams of drug B, 50 grams of acetone and 6.25 grams of deionized water.

[0028] 2. Pour the weighed drug B granules into a beaker filled with acetone, set the water bath temperature of the collector type constant temperature heating magnetic stirrer to 40°C, and stir for 20 minutes until the granules are completely dissolved.

[0029] 3. Add the weighed deionized water into the solution in step 2, keep stirring for 20 minutes at the same water bath temperature, until the white precipitate is completely dissolved to obtain the precursor solution.

[0030] 4. Fix the 25um thick graphite film on the plate with adhesive tape. The purpose is to prevent the graphite film from being brought up when the solution evaporates, causing wrinkles. Use an adjustable scraper for coating, and control the height of the adjustable scraper to 1500um . Then let it air-dry naturally, ...

Embodiment 2

[0032] 1. The mass ratio of the three is required to be: drug B: acetone: deionized water = 1:8:1. So weigh 6.25 grams of drug B, 50 grams of acetone and 6.25 grams of deionized water.

[0033] 2. Pour the weighed granules of drug B into a beaker filled with acetone, set the water bath temperature of the collector type constant temperature heating magnetic stirrer to 40°C, and stir for 20 minutes until the granules are completely dissolved.

[0034] 3. Add the weighed deionized water into the solution in step 2, keep stirring for 20 minutes at the same water bath temperature, until the white precipitate is completely dissolved to obtain the precursor solution.

[0035] 4. Fix the 25um thick graphite film on the plate with adhesive tape. The purpose is to prevent the graphite film from being brought up when the solution evaporates, causing wrinkles. Use an adjustable scraper for coating, and control the height of the adjustable scraper to 2000um . Then let it air-dry naturall...

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Abstract

The invention discloses a preparation method of an enhanced cooling carbon based composite film. The method comprises the specific steps of preparing a polyvinylidene fluoride-hexafluoropropylene precursor solution; fixing a graphite film to a flat plate; and applying the precursor solution to the graphite film. The prepared carbon based composite film can be suitable for cooling of a system and equipment, and is particularly suitable for a cooling technology of spacecrafts and cooling of outdoor electronic devices; and the applied polyvinylidene fluoride-hexafluoropropylene precursor solutioncan be combined with the graphite film more easily, and the performances of the precursor solution and the graphite film are not affected.

Description

technical field [0001] The invention relates to a method for manufacturing a carbon-based composite film for strengthening heat dissipation, and belongs to the technical field of functional materials. Background technique [0002] With the development of society, people's work is more and more dependent on electronic equipment. At present, there are many outdoor electronic equipments. Due to the influence of solar heat radiation and the heating of the equipment itself, the temperature of the electronic equipment will increase. If the temperature is too high, the electronic equipment will fail. Therefore, the elimination of these two heat sources will affect the electronic equipment. It's critical to work properly. Existing cooling methods include air conditioning, forced ventilation, and air heat exchange. However, the economy and reliability of the above methods need to be improved. As a new type of cooling method, radiation cooling solves the above problems. The polyvi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K7/20
CPCH05K7/2039
Inventor 张宏凯范德松
Owner NANJING UNIV OF SCI & TECH
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