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Preparation process of nano ato thermal insulation organic coating

A technology of organic coating and preparation process, applied in coating, device for coating liquid on surface, surface pretreatment, etc., can solve the problem of uneven particle size distribution of ATO, affecting heat insulation effect, etc., and achieve strong hydrophobicity , good thermal insulation performance, improve the effect of dispersion effect

Active Publication Date: 2018-08-31
LIUZHOU HAOXIANGTE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the deficiency of the existing nano-ATO coating preparation method, the ATO particle size distribution in the prepared coating is uneven, which affects the heat insulation effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0024] The preparation technology of nano-ATO thermal insulation organic coating of the present invention, it adopts the following steps:

[0025] 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.

[0026] In t...

Embodiment 1

[0030] 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 coupling agent is 1:3:0.02, and the magnetic stirring speed is 250r / min for 2 minutes, and then the nano-ATO composite coating i...

Embodiment 2

[0032] 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, an angle of 60° with the horizontal direction is maintained, and argon gas is introduced at a flow rate of 30m / s 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 it is stirred with a rotating speed of 300r / min for 40 minutes and then left to stand to obtain a nano-A...

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Abstract

The invention relates to the field of processing of thermal insulation coatings, in particular to a preparation process for a nanometer ATO thermal insulation organic coating. The preparation process comprises the steps that ethyl alcohol is added to nanometer ATO powder to be prepared into slurry; the slurry which is stirred to be uniform is vertically sprayed to the surface of a roller rotating at a high speed from top to bottom through a nozzle; the rollers throw the slurry into an atomizing chamber on one side; high-pressure inert gas is introduced into the atomizing chamber to impact on slurry drops; the high-pressure inert gas is recovered from the upper side of the atomizing chamber, and the ATO slurry is collected from the lower side of the atomizing chamber; ethyl alcohol and a silane coupling agent are added to the collected ATO slurry, and the mixture is stirred to be uniform and then stands to obtain the ATO thermal insulation coating. The sprayed ATO slurry is smashed through centrifugal force of the rotating rollers and then hit by the high-pressure inert gas, so that agglomeration of ATO particles in the slurry is broken, and the dispersion effect of the ATO slurry is improved; meanwhile, the ATO thermal insulation composite organic coating is prepared from ethyl alcohol, the silane coupling agent and the ATO slurry, and the coating is subjected to spray coating and fluoridation in sequence, so that the thermal insulation property is good, and the hydrophobic property is high.

Description

technical field [0001] The invention relates to the field of preparation of heat-insulating coatings, in particular to the preparation process of nano-ATO heat-insulating organic coatings. Background technique [0002] At present, more and more coating manufacturers pay attention to nano-transparent heat-insulating coatings because they can transmit visible light and block infrared light well. Now, in China, research on this kind of coating is still in its infancy, and it is only applied to buildings and vehicles that run air-conditioning systems. Nano-ATO, or antimony-doped tin dioxide, is the main material in transparent thermal insulation coatings. It is a transparent N-type semiconductor material with good electrical conductivity. Nano-conductive particles contain a certain concentration of electron holes, which cause free current-carrying Absorption of particles: for the ultraviolet region (200-380nm) that accounts for 5% of the solar energy, ATO particles are almost c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00C09D7/63B05D7/04B05D3/02B05D3/10
CPCB05D3/0254B05D3/107B05D7/04B05D2201/02B05D2601/20C09D1/00C09D7/63
Inventor 易鉴荣林荔琍唐臻吴坚林荔珊
Owner LIUZHOU HAOXIANGTE SCI & TECH