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A kind of graphene oxide disperses high-quality graphite powder, graphene, the method for preparing high thermal conductivity, high conductivity thin film
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A high conductivity and graphene technology, which is applied in the field of high thermal conductivity film to prepare high conductivity, can solve the problems of thickness reduction, inability to achieve controllable thickness gradient preparation, and inability to adapt to ultra-thin, so as to improve electrical conductivity and thermal conductivity , good mechanical strength, and the effect of meeting application requirements
Active Publication Date: 2017-02-08
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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The preparation of these films is affected by the accuracy of the machine and the properties of the material itself. On the one hand, the thickness cannot be further reduced, and on the other hand, the controllable gradient preparation of the thickness cannot be achieved.
This type of process obviously cannot adapt to the application of ultra-thin, ultra-light new generation electronic components
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Embodiment 1
[0056] Dissolve 50 mg of graphene obtained by the ball milling method in 1000 ml of ethanol, ultrasonically disperse for 15 minutes, add 3 ml of graphene oxide solution with a concentration of 2 mg / ml and stir evenly, then add 2 ml of p-hydroxybenzoic acid and stir evenly, filter with suction and let it air naturally Dry.
[0057] The prepared graphene film can be easily peeled off from the filter paper, and rolled by a film rolling machine at 10 MPa, and the film thickness is about 8 μm.
[0058] Finally, high-temperature carbonization treatment at 2500°C for half an hour, the thermal conductivity of the film after carbonization treatment is 800-1200W / m·K, and the electrical conductivity is 1100-1600S / cm.
Embodiment 2
[0060] Dissolve 75 mg of graphene obtained by ball milling in 1000 ml of ethanol, ultrasonically disperse for 15 minutes, add 4.5 ml of graphene oxide solution with a concentration of 2 mg / ml and stir evenly, then add 3 ml of p-hydroxybenzoic acid and stir evenly, suction filter and naturally to dry.
[0061] The prepared graphene film can be easily peeled off from the filter paper, and rolled by a film rolling machine at 10 MPa, and the film thickness is about 12 μm.
[0062] Finally, high-temperature carbonization treatment at 2500°C for half an hour, the thermal conductivity of the film after carbonization treatment is 800-1200W / m·K, and the electrical conductivity is 1100-1600S / cm.
Embodiment 3
[0064] Dissolve 100 mg of graphene obtained by ball milling in 1000 ml of ethanol, ultrasonically disperse for 15 minutes, add 6 ml of graphene oxide solution with a concentration of 2 mg / ml and stir evenly, then add 4 ml of p-hydroxybenzoic acid and stir evenly, filter with suction and let it air naturally Dry.
[0065] The prepared graphene film can be easily peeled off from the filter paper, and rolled by a film rolling machine at 10 MPa, and the film thickness is about 16 μm.
[0066] Finally, high-temperature carbonization treatment at 2500°C for half an hour, the thermal conductivity of the film after carbonization treatment is 800-1200W / m·K, and the electrical conductivity is 1100-1600S / cm.
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Abstract
The invention relates to a method of preparing a high-heat-conductive and high-electric-conductive thin film through dispersion of high-quality graphite powder and graphene with graphene oxide. The method includes the following steps: (1) adding the graphite powder and / or graphene to a certain organic solution, and performing ultrasound dispersion for a certain time to obtain a first dispersion; (2) adding a graphite oxide solution in a certain organic solution to the first dispersion, and stirring the mixture to obtain a second dispersion, wherein the mass ratio of the graphene oxide to the graphite powder and the graphene is 1:2-1:100; (3) adding an organic substance containing a benzene ring macro molecule in a certain amount to the second dispersion, and stirring the mixture uniformly to obtain a third dispersion, wherein the mass ratio of the organic substance containing the benzene ring macro molecule to the graphene oxide is 1:1-1:10; (4) performing suction filtration to the third dispersion to form a film and drying the film to obtain a precursor thin film; and (5) rolling the precursor thin film in a roller press machine under a certain pressure, and performing high-temperature carbonization at 1000-3000 DEG C for 30-600 min to obtain the high-heat-conductive and high-electric-conductive thin film.
Description
technical field [0001] The invention relates to a method for preparing a high-conductivity and high-heat-conduction film by using graphite powder or graphene. Background technique [0002] With the rapid development of electronic technology, a large number of ultra-thin, ultra-light, and flexible electronic products have emerged in our lives and become an indispensable part of our lives. The performance of such electronic products and the length of service life are inevitably related to the heat dissipation of the device itself. The use of high-power and super-performance electronic products is often accompanied by the generation of a large amount of heat energy. If such heat energy cannot be dissipated in a timely and rapid manner, it will not only affect the use efficiency of the device itself, but also cause damage to the electronic device when the heat accumulation is serious. fire. [0003] In order to solve the internal heat dissipation problem of electronic products...
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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/04
Inventor 黄富强于刘涛毕辉张阳
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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