Electric-insulation heat-conduction epoxy resin composite material and preparation method thereof
A technology of epoxy resin and composite materials, applied in the direction of heat exchange materials, organic insulators, chemical instruments and methods, etc., can solve the problems of low thermal conductivity, poor fluidity, low viscosity, electrical insulation and thermal conductivity, etc., to achieve Low viscosity, good fluidity, enhanced mechanical properties
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Embodiment 1
[0036] Example 1 Preparation of electrical insulating and thermally conductive epoxy resin composite material of the present invention
[0037] 2 g of carbon nanotubes were placed in a mixed acid of 225 ml of nitric acid and 75 ml of sulfuric acid, refluxed and oxidized at 120° C. for 12 h, then filtered, washed with deionized water and dried. Carboxylated modified carbon nanotubes are obtained. Ultrasonic dispersion of 1.8 g of the carboxylated modified carbon nanotubes in 270 ml of thionyl chloride, ultrasonic dispersion at room temperature for 30 minutes, mechanical stirring at 80 ° C for 12 hours, after the reaction was completed, filtered, washed with anhydrous tetrahydrofuran, and dried After 20 minutes, acylated carbon nanotubes were obtained.
[0038] Add 1.5 g of the obtained acylated carbon nanotubes to 15 g of diethanolamine, ultrasonically disperse at 80°C for 30 minutes, then mechanically stir at 100°C for 36 hours under the protection of nitrogen, wash with abso...
Embodiment 2
[0041] Example 2 Preparation of Electrically Insulating and Thermally Conductive Epoxy Resin Composite Material of the Present Invention
[0042] 2 g of carbon nanotubes were placed in a mixed acid of 225 ml of nitric acid and 75 ml of sulfuric acid, refluxed and oxidized at 120° C. for 12 h, then filtered, washed with deionized water and dried. Carboxylated modified carbon nanotubes are obtained. Ultrasonic dispersion of 1.8 g of the carboxylated modified carbon nanotubes in 270 ml of thionyl chloride, ultrasonic dispersion at room temperature for 30 minutes, mechanical stirring at 80 ° C for 12 hours, after the reaction was completed, filtered, washed with anhydrous tetrahydrofuran, and dried After 20 minutes, acylated carbon nanotubes were obtained.
[0043] Add 1.5 g of the obtained acylated carbon nanotubes to 15 g of diethanolamine, ultrasonically disperse at 80°C for 30 minutes, then mechanically stir at 100°C for 36 hours under the protection of nitrogen, wash with ab...
Embodiment 3
[0046] Example 3 Preparation of Electrically Insulating and Thermally Conductive Epoxy Resin Composite Material of the Present Invention
[0047] 1 g of carbon nanotubes was placed in a mixed acid of 25 ml of nitric acid and 75 ml of sulfuric acid, refluxed and oxidized at 90° C. for 6 h, then filtered, washed with deionized water and dried. Carboxylated modified carbon nanotubes are obtained. Ultrasonic dispersion of 0.8 g of the treated carbon nanotubes in 800 ml of thionyl chloride, ultrasonic dispersion at room temperature for 40 minutes, mechanical stirring at 100 ° C for 24 hours, after the reaction was completed, filtered, washed with anhydrous tetrahydrofuran, and dried for 30 Minutes later, acylated carbon nanotubes were obtained.
[0048] Add 0.5 g of the obtained acylated carbon nanotubes to 60 g of diethanolamine, ultrasonically disperse at 90°C for 50 minutes, then mechanically stir at 120°C for 40 hours under the protection of nitrogen, wash with absolute ethano...
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