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Preparation technology of nano ATO heat-insulating coating

A thermal insulation coating and preparation technology, which is applied in coatings, devices for coating liquid on the surface, radiation-absorbing coatings, etc., can solve the problems of affecting the thermal insulation effect and uneven particle size distribution of ATO, and achieve hydrophobic performance Strong, good heat insulation performance, improve the effect of dispersion effect

Active Publication Date: 2016-04-27
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

[0025] The preparation technology of nano-ATO thermal insulation coating of the present invention, it adopts the following steps:

[0026] 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 hit by high-speed gas to achieve the second dispersion; this makes the particle size of ATO smaller, laying a good foundation for the preparation of stable coatings; in the atomization chamber...

Embodiment 1

[0031] 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 under the pressure of the gas, the slurry is sprayed into the collection chamber through the injector, and then the gas is recovered from the upper side of the collection chamber, and the ATO slurry is collected from the bottom of the collection chamber; then, slowly add ethanol to the collected ATO slurry And silane coupling agent, wherein the volume ratio of ATO slurry, ethanol, silane coupling agent is 1:3:0...

Embodiment 2

[0033] 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 Hit the slurry; then under the pressure of the gas, the slurry is injected into the collection chamber through the injector, and then the gas is recovered from the upper side of the collection chamber, and the ATO slurry is collected from the bottom of the collection chamber; then, slowly add to the collected ATO slurry Ethanol and silane coupling agent, wherein the volume ratio of ATO slurry, ethanol, silane coupling agent is ...

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Abstract

The invention relates to the processing field of heat-insulating coatings, in particular to a preparation technology of a nano ATO heat-insulating coating. The preparation technology comprises steps as follows: adding ethyl alcohol to nano ATO powder to prepare slurry; vertically spraying the evenly stirred slurry to the surface of a roller rotating at the high speed through a nozzle from top to bottom; throwing the slurry towards an atomizing chamber by the roller; introducing high-pressure inert gas into the atomizing chamber to impact slurry droplets; spraying the slurry droplets and gas to a collecting chamber; then recovering the inert gas from the upper side of the collecting chamber and collecting ATO slurry from the lower side of the collecting chamber; adding ethyl alcohol and a silane coupling agent to the slurry to obtain the ATO heat-insulating coating. Sprayed ATO slurry is smashed by centrifugal force of the rotating roller and impacted with high-speed inert gas, agglomeration of ATO particles in the slurry is damaged. Then the dispersed slurry and the gas are sprayed to the collecting through a sprayer, the slurry is dispersed again, and the dispersion effect of the ATO slurry is greatly improved.

Description

technical field [0001] The invention relates to the field of preparation of heat-insulating coatings, in particular to a preparation process of nano-ATO heat-insulating 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 completely ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/32C09D1/00C08J7/12C08J7/06B05D5/00B05D3/10
CPCB05D3/107B05D5/00C08J7/06C08J7/126C08J2367/02C09D1/00C09D5/32
Inventor 易鉴荣林荔琍唐臻吴坚林荔珊
Owner LIUZHOU HAOXIANGTE SCI & TECH
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