Preparation method of graphite/carbon nanotube fiber bundle/graphene thermally conductive composite film
A technology of carbon nanotube fiber and heat conduction composite, which is applied in the direction of nanotechnology, nanotechnology, heat exchange materials, etc., can solve the problems of low thermal conductivity and low thermal conductivity anisotropy of heat conduction sheets, and achieve low thermal conductivity anisotropy Energy and growth are simple and controllable
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Embodiment 1
[0030] Put commercially available graphite paper with a thickness of 0.1mm into a magnetic boat, and ablate and oxidize it at 400°C for 0.5 hours in a tube furnace with an air atmosphere; immerse the ablated and oxidized graphite paper in pure orthosilicic acid Immerse in ethyl ester solvent for 0.5 hours, then take out the impregnated graphite paper and place it in the air to age for 5 hours. The graphite paper was placed in a blast drying oven and dried at 60°C for 18 hours to obtain graphite paper with a silicon oxide coating on the surface; the ferrocene was dissolved in xylene solution to make a catalyst precursor solution with a concentration of 0.02g / ml. Place the graphite paper with silicon oxide coating on the surface in the constant temperature zone of the vacuum tube furnace, pump it to a vacuum, and then pass in argon as a protective gas. The temperature is raised by the program control, and the temperature is raised to 700°C at a constant speed of 10°C / min to reach...
Embodiment 2
[0032] Put commercially available graphite paper with a thickness of 0.5 mm into a magnetic boat, and ablate and oxidize it at a temperature of 500 °C for 2 hours in a tube furnace with an air atmosphere; immerse the ablated and oxidized graphite paper in pure orthosilicic acid Immerse in ethyl ester solvent for 1.5 hours, then take out the impregnated graphite paper and place it in the air to age for 10 hours. The graphite paper was placed in a blast drying oven and dried at 80°C for 24 hours to obtain graphite paper with a silicon oxide coating on the surface; the ferrocene was dissolved in xylene solution to make a catalyst precursor solution with a concentration of 0.05g / ml. Place the graphite paper with silicon oxide coating on the surface in the constant temperature zone of the vacuum tube furnace, pump it to a vacuum, and then pass in argon as a protective gas, and the temperature is raised by the program control, and the temperature is raised to 900°C at a constant spee...
Embodiment 3
[0034] Put commercially available graphite paper with a thickness of 0.3mm into a magnetic boat, and ablate and oxidize it at a temperature of 450°C for 1 hour in a tube furnace with an air atmosphere; immerse the ablated and oxidized graphite paper in pure orthosilicic acid Immerse in ethyl ester solvent for 1 hour, then take out the impregnated graphite paper and place it in the air to age for 8 hours, the air reacts with tetraethyl orthosilicate on the surface of the graphite paper to convert it into ortho silicic acid, and then the aging is completed The graphite paper was placed in a blast drying oven and dried at 70°C for 20 hours to obtain graphite paper with a silicon oxide coating on the surface; the ferrocene was dissolved in xylene solution to make a catalyst precursor solution with a concentration of 0.03g / ml. Place the graphite paper with silicon oxide coating on the surface in the constant temperature zone of the vacuum tube furnace, pump it to a vacuum, and then ...
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