Abstract: the present invention relates to a high thermal conductivity of nano diamond insulating paint, varnish 65 ~ 85, it is made of nanometer diamond 10 ~ 30, super dispersant 5 ~ 10, titanate coupling agent is 0.06 ~ 0.06 and anhydrous ethanol made from 3.3 ~ 10 copies of raw materials. According to the composition and preparation methods of nano diamond made of insulating varnish, through insulating coating or dipping in high power density electric equipment, insulation and has good heat transfer performance of thermal conductivity, can be used in circuit board surface coating to enhance thermal conductive heat resistance of the circuit board, improve the circuit working stability; Also can be used in high power density of electrical equipment for internal impregnated or coated to get inside the heat generated by the export of the electrical equipment, to achieve rapid cooling or heat out of the practical effect, improve the load ability of electrical equipment.
Independent claim:
1. A high thermal conductivity of nano diamond insulating paint, whose character is: the high thermal conductivity of nano diamond insulating varnish is composed of the following weight ratio of raw materials: insulating varnish 65 ~ 85, nano diamond 10 ~ 30, super dispersant 5 ~ 10, titanate coupling agent is 0.06 ~ 0.06 and anhydrous ethanol made from 3.3 to 10.
2. According to claim 1 the high thermal conductivity of nano diamond insulating paint, whose character is: the super dispersant used model described by CH - 13 e dispersant.
3. According to claim 1 the high thermal conductivity of nano diamond insulating paint, whose character is: the titanate coupling agent described the model of XY - 21 or KH - 550 or KH - 570, KH - 581 or the titanate coupling agent KH - 792.
4. According to claim 1 the high thermal conductivity of nano diamond insulating paint, whose character is: described the ratio of the weight of the raw material for: insulating paint, 65, nano diamond 10, super dispersant 5, 0.06 of titanate coupling agent, anhydrous ethanol 3.3.
5. According to claim 1 the high thermal conductivity of nano diamond insulating paint, whose character is: the weight of each raw material proportioning described as: insulating paint, 70, nano diamond 15, super dispersant 6 copies of titanate coupling agent 0.10 servings, anhydrous ethanol 4.6.
6. According to claim 1 the high thermal conductivity of nano diamond insulating paint, whose character is: the weight of each raw material proportioning described as: insulating paint, 75 nanometer diamond 20, super dispersant 7, 0.14 of titanate coupling agent, anhydrous ethanol 6.7.
7. According to claim 1 the high thermal conductivity of nano diamond insulating paint, whose character is: the weight of each raw material proportioning described as: varnish, 80, 25, nano diamond super dispersant 9, 0.17 of titanate coupling agent, anhydrous ethanol 8.3.
8. According to claim 1 the high thermal conductivity of nano diamond insulating paint, whose character is: the weight of each raw material proportioning described as: insulating paint, 85, 30 nanometer diamond, super dispersant, October 0.2 of titanate coupling agent, anhydrous ethanol ten copies.
9. a preparation described in claim 1 of the high thermal conductivity of nano-diamond varnish method, characterized this method is carried out according to the following steps: step 1. Nano diamond of processing: selection grain diameter ≤ 500nm of nano diamond, into small reaction kettle in the, by Nano Diamond: thick sulfuric acid = 1:5~10 of quality percentage injected concentration for 80~90% of thick sulfuric acid for pickling, heating to 70 ℃, insulation 2-3 hours, then filter to acid liquid, out Nano diamond, again with pure water cleaning 3~5 times, into drying room in the heating to 150-200℃ for dry alternate; Steps 2. modified sex Nano diamond of preparation: by by said ratio take titanium acid ester I joint agent and 98% concentration of no water ethanol and steps 1 processing Hou of nano diamond, and with into thermostat sink in the side heating side high-speed mixing, mixing speed for 1500~2800 turned/minutes, sink temperature not over 80 ℃, mixing 1 hours makes of full mixed, on Nano diamond for surface modified sex processing, mixing completed Hou, put sink heating to 100 ℃, makes ethanol full volatile, out mixed good of nano diamond, Into the oven for drying, drying temperature is 120~150℃, drying time of 5 hours, mixture after drying in the drying chamber is then let stand for 24 hours, to dry, and finally using ball mill grinding, crushing 1 hour, use 600 mesh screen, made of modified Nano-diamond reserve; 3. mixing: apply insulating inject high speed disperser in according to the proportion set forth in synchronized flow and surface modification of nano-diamond and Super-dispersants, high speed dispersion machine after 2 hours, and then into the ultrasonic dispersion or sanding machine for 1 hour, which dispersed temperature is not higher than 90 ℃, high thermal conductivity of nano-diamond varnish.
