Preparation Technology of Nano Ato Thermal Insulation Composite Coating
A composite coating and preparation technology, which is applied in the direction of coating, etc., can solve the problems of uneven particle size distribution of ATO and affect the heat insulation effect, etc., and achieve the effects of strong hydrophobicity, good heat insulation performance, and improved dispersion effect
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[0020] The preparation technology of ATO thermal insulation composite paint of the present invention, it adopts the following steps:
[0021] First, add ethanol to the nano-ATO powder and stir evenly to prepare a slurry, and then spray the uniformly stirred slurry vertically through the nozzle to the surface of the high-speed rotating roller; during the implementation process, the mass flow rate of the slurry injection should be ensured. 6- 8g / s, the vertical distance between the nozzle and the roller is 0.01-0.1mm, the diameter of the roller used at the same time is 40-50mm, and the rotation speed of the roller is 300-350r / min; during the implementation process, the effect of the nozzle and the roller makes the slurry The first dispersion, and the slurry thrown to the atomization chamber is impacted by high-speed gas to achieve the second dispersion; this makes the ATO particle size smaller and lays a solid foundation for the preparation of stable coatings.
[0022] In the at...
Embodiment 1
[0025] Take ATO powder with a particle size of about 30nm, add ethanol to prepare a 20wt% slurry, and then spray the slurry vertically through the nozzle onto the surface of the rotating roller; keep the mass flow rate of the slurry injection at 6g / s, the nozzle and the roller The vertical distance between them is 0.01mm, the diameter of the roller is 40mm, and the rotation speed of the roller is 300r / min; at the same time, in the atomization chamber, maintain an angle of 45° with the horizontal direction, and pass argon gas at a flow rate of 30m / s to impact slurry; then recover the gas from the upper side of the atomization chamber, collect the ATO slurry from the bottom of the atomization chamber; then, slowly add ethanol and silane coupling agent to the collected ATO slurry, wherein ATO slurry, ethanol, silane coupling agent The volume ratio of the joint agent is 1:3:0.02, and the magnetic stirring at a speed of 250r / min is used for 2 minutes and then left to stand to obtain...
Embodiment 2
[0027] Take ATO powder with a particle size of about 35nm, add ethanol to prepare a 25wt% slurry, then spray the slurry vertically through the nozzle to the surface of the rotating roller; keep the mass flow rate of the slurry injection at 7g / s, the nozzle and The vertical distance between the rollers is 0.05mm, the diameter of the rollers is 45mm, and the rotation speed of the rollers is 320r / min; at the same time, in the atomization chamber, the angle of 60° with the horizontal direction is maintained, and the flow rate of 30m / s is passed into the argon gas Impact the slurry; then recover the gas from the upper side of the atomization chamber, collect the ATO slurry from the bottom of the atomization chamber; then, slowly add ethanol and silane coupling agent to the collected ATO slurry, wherein ATO slurry, ethanol, silane The volume ratio of the coupling agent is 1:4:0.07, and the magnetic stirring at a rotational speed of 300r / min is used for 40min and then left to stand to...
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Abstract
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