A kind of preparation method of amino functionalized carbon nanotube/epoxy resin composite material
A technology of amino functionalization and carbon nanotubes, which is applied in the field of nanocomposite materials, can solve the problems that the uniform dispersion cannot be solved well, the microscopic composition of composite materials is not uniform, and the performance of carbon nanotubes is hindered. It is easy to realize industrialization, The effect of low production cost, improved mechanical properties and electrical conductivity
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Embodiment 1
[0024] (1) Weigh carbon nanotube 0.2g, tannic acid 0.2g and polyethyleneimine (M w =600) 0.1g are dispersed in water together, the pH value is adjusted to 8.5, reacted for 12 hours at 25°C, and amino groups are introduced to the surface of the carbon nanotubes;
[0025] (2) Weigh 1g of the amino-modified carbon nanotubes obtained in the above steps, add 20-30mL tetrahydrofuran (THF), and ultrasonically disperse it completely for 1h, then add 70g of epoxy monomer (E51), and stir evenly with a glass rod Then place it on a stirring platform, heat it to 30°C, and stir overnight, so that the epoxy monomer and the copolymer can be fully mixed during the solvent volatilization process.
[0026] (3) Subsequently, the mixture obtained in the above steps is placed in a vacuum oven, and the vacuum is continuously pumped to remove residual solvent and a large amount of bubbles generated during the stirring process. Appropriately increasing the temperature (30°C) can reduce the viscosity ...
Embodiment 2
[0029] (1) Weigh carbon nanotube 0.2g, tannic acid 0.1g and polyethyleneimine (M w =5000) 0.2g are dispersed in water together, the pH value is adjusted to 10, reacted for 4 hours at 25°C, and amino groups are introduced to the surface of the carbon nanotubes;
[0030] (2) Weigh 3g of the amino-modified carbon nanotubes obtained in the above steps, add 20-30mL of tetrahydrofuran (THF), and ultrasonically disperse it completely for 1h, then add 66g of epoxy monomer (E51), and stir evenly with a glass rod Then place it on a stirring platform, heat it to 30°C, and stir overnight, so that the epoxy monomer and the copolymer can be fully mixed during the solvent volatilization process.
[0031] (3) Subsequently, the mixture obtained in the above steps is placed in a vacuum oven, and the vacuum is continuously pumped to remove residual solvent and a large amount of bubbles generated during the stirring process. Appropriately increasing the temperature (30°C) can reduce the viscosit...
Embodiment 3
[0034] (1) Weigh carbon nanotube 0.2g, tannic acid 0.1g and polyethyleneimine (M w =10000) 0.4g are dispersed in water together, the pH value is adjusted to 9.5, reacted at 25°C for 8 hours, and amino groups are introduced to the surface of the carbon nanotubes;
[0035] (2) Weigh 5g of the amino-modified carbon nanotubes obtained in the above steps, add 20-30mL of tetrahydrofuran (THF), and ultrasonically disperse it completely for 1 hour, then add 65g of epoxy monomer (E51), and stir evenly with a glass rod Then place it on a stirring platform, heat it to 30°C, and stir overnight, so that the epoxy monomer and the copolymer can be fully mixed during the solvent volatilization process.
[0036] (3) Subsequently, the mixture obtained in the above steps is placed in a vacuum oven, and the vacuum is continuously pumped to remove residual solvent and a large amount of bubbles generated during the stirring process. Appropriately increasing the temperature (30°C) can reduce the vi...
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