Preparation method of reduction graphene oxide heat-conducting film

A graphene film and thermal conductive film technology, applied in the field of materials science, can solve the problems of difficult to maintain a large-area complete structure, easy to break, etc., and achieve the effect of significant technological progress and overcoming easy breakage.

Inactive Publication Date: 2014-09-10
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is relatively easy to prepare graphene oxide film through graphene oxide, and the prepared film is relatively regular, but it is easy to break when it is reduced to graphene film, and it is difficult to maintain a large area of ​​complete structure.

Method used

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  • Preparation method of reduction graphene oxide heat-conducting film
  • Preparation method of reduction graphene oxide heat-conducting film
  • Preparation method of reduction graphene oxide heat-conducting film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Measure 96mL of concentrated sulfuric acid and place it in a dry container, add 2g of sodium nitrate to it, stir to dissolve the sodium nitrate, then add 2g of flake graphite, after the flake graphite is evenly dispersed, slowly add 12g of potassium permanganate, react for 1.5h, During the whole process, an ice bath was used to keep the system at 0-5°C. Then the temperature was raised to 35°C for 2.5h. Slowly add 80mL of deionized water to the system, react for 10min, then slowly add 200mL of deionized water to the system, and then add 10mL of H 2 o 2 , continue the reaction for 10 min, and filter the above product with suction, and wash the product with suction and filtration with 800mL 5wt% HCl at the same time to remove the metal ions in the solution, and wash the above product repeatedly with deionized water until the solution becomes neutral. The washed product was dried in an oven at 120°C to obtain graphite oxide.

[0029] Add graphite oxide to deionized water...

Embodiment 2

[0040] Graphene oxide was prepared according to the method in Example 1. 200 mg of graphene oxide was weighed, added to 200 mL of solvent, and subjected to ultrasonic treatment for 1 h (100 W, 40 KHz) to obtain a graphene oxide dispersion. Measure 20mL of the above-mentioned graphene oxide dispersion, carry out vacuum filtration with a mixed cellulose microporous filter membrane with a pore size of 0.45 μm, dry the filter cake together with the filter membrane at 80°C for 24 hours, and then peel off the filter cake from the filter membrane to obtain Graphene oxide film, the reduced graphene oxide film is obtained by high temperature treatment.

[0041] Described solvent is the mixed solution that is made into by 100mL deionized water and 100mL ethanol;

[0042] The concentration of graphene oxide in the described graphene oxide dispersion is 1mg / mL;

[0043] The thickness of the graphene oxide film is 10 μm;

[0044] For the high-temperature reduction, the graphene oxide fil...

Embodiment 3

[0047] Graphene oxide was prepared according to the method in Example 1. 1000 mg of graphene oxide was weighed, added to 200 mL of solvent, and subjected to ultrasonic treatment for 1 h (100 W, 40 KHz) to obtain a graphene oxide dispersion. Measure 20mL of the above-mentioned graphene oxide dispersion, carry out vacuum filtration with a mixed cellulose microporous filter membrane with a pore size of 0.45 μm, dry the filter cake together with the filter membrane at 80°C for 24 hours, and then peel off the filter cake from the filter membrane to obtain Graphene oxide film, the reduced graphene oxide film is obtained by high temperature treatment.

[0048] Described solvent is the mixed solution that is made into by 100mL deionized water and 100mL ethanol;

[0049] The concentration of graphene oxide in the described graphene oxide dispersion is 3mg / mL;

[0050] The thickness of the graphene oxide film is 35 μm;

[0051] For the high-temperature reduction, the graphene oxide fi...

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Abstract

The invention relates to a preparation method of a reduction graphene oxide heat-conducting film. The preparation method comprises the following steps of: firstly weighing graphite oxide, adding the graphite oxide to deionized water, and carrying out ultrasonography, centrifugalizing at low speed for impurity removal, drying and grinding to obtain graphene oxide; dissolving the graphene oxide into a solvent, and carrying out the ultrasonography to prepare a graphene oxide dispersion solution; carrying out vacuum filtration on the graphene oxide dispersion solution by adopting a microporous filtering film, drying an obtained filter cake and the filtering film together, and then stripping the filter cake from the filtering film to obtain a graphene oxide film; acquiring the reduction graphene oxide heat-conducting film by adopting a high-temperature heat treatment or hydriodic acid reduction method in a restricted space. The preparation method disclosed by the invention effectively solves the technical problems of easiness for breakage and difficulty in large-area integrity keeping in preparing the reduction graphene oxide heat-conducting film from the graphene oxide film and is simple and higher in film heat conductivity; the prepared reduction graphene oxide heat-conducting film achieves potential practical application value in the field of heat radiation of a microelectronic device.

Description

Technical field [0001] The present invention is a material science, and especially involves a carbon material. Specifically, it is a preparation method for restoring oxygenic glycene thermal film. Background technique [0002] With the continuous development and progress of technology, the size of micro -electrical devices is getting smaller and smaller, but the unit volume of the unit is getting larger and larger. The heat dissipation problem of the device has become a bottleneck to ensure the high performance and reliability of the device.In order to meet the needs of heat dissipation equipment and promote the development of modern technology, new heat dissipation materials need to have three characteristics: light quality, high mechanical strength, and high thermal guidance.Traditional heat dissipation materials are mainly metal materials (such as silver, copper, aluminum). These materials have a large density, high thermal expansion coefficient, and insufficient thermal guida...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01B32/184
Inventor 金双玲曾祥英金鸣林张睿刘克家邵霞王占勇
Owner SHANGHAI INST OF TECH
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