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Dewing-frosting preventing self-cleaning coating and preparation method thereof

A self-cleaning coating, anti-condensation technology, used in coatings, devices that apply liquid to surfaces, special surfaces, etc., can solve problems such as condensation and frost, and achieve easy access, long service life, and rough structure. enhanced effect

Inactive Publication Date: 2019-11-26
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to prepare a hydrophobic anti-condensation and frosting self-cleaning material. At present, there are serious problems of condensation and frost in both life and industrial production, so it has been widely used in air conditioning systems, building glass curtain walls, and aircraft wings.

Method used

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  • Dewing-frosting preventing self-cleaning coating and preparation method thereof
  • Dewing-frosting preventing self-cleaning coating and preparation method thereof
  • Dewing-frosting preventing self-cleaning coating and preparation method thereof

Examples

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Effect test

Embodiment 1

[0033] A method for preparing a hydrophobic anti-condensation and frosting self-cleaning coating, the specific steps are:

[0034] Prepare silica sol: add 2.1ml tetraethyl orthosilicate dropwise to 30ml ethanol, and stir vigorously. After 10 minutes, 2 ml of hexamethyldisilazane was added dropwise, and after 30 minutes, 3 ml of deionized water was added dropwise. Then, the whole reaction was continued to stir vigorously for another 2 hours. Then aging the obtained mixed solution at room temperature for 10 days to obtain the silica sol.

[0035] Add 0.2g of nano silicon dioxide to 10ml of aged silica sol, stir for 1h, and ultrasonically vibrate for 30min, then add the obtained solution into 10ml of ethanol, and ultrasonically vibrate for 30min to obtain a coating raw material solution.

[0036] Preparation of copper surface nanostructures: Soak the copper sheet in a mixed solution of sodium hydroxide (2.5 M) and ammonium sulfate (0.13 M) for 15 minutes, take it out, clean it ...

Embodiment 2

[0040] A method for preparing a hydrophobic anti-condensation and frosting self-cleaning coating, the specific steps are:

[0041] Prepare silica sol: add 2.1ml tetraethyl orthosilicate dropwise to 35ml ethanol, and stir vigorously. After 10 minutes, 2 ml of hexamethyldisilazane was added dropwise, and after 30 minutes, 3 ml of deionized water was added dropwise. Then, the whole reaction was continued to stir vigorously for another 2 hours. Then aging the obtained mixed solution at room temperature for 10 days to obtain the silica sol.

[0042] Add 0.25g of nano silicon dioxide to 10ml of aged silica sol, stir for 1h, and ultrasonically vibrate for 30min, then add the obtained solution into 10ml of ethanol, and ultrasonically vibrate for 30min to obtain a coating raw material solution.

[0043]Preparation of copper surface nanostructures: Soak the copper sheet in a mixed solution of sodium hydroxide (2.5 M) and ammonium sulfate (0.13 M) for 60 minutes, take it out, clean it ...

Embodiment 3

[0047] A hydrophobic anti-condensation and frosting self-cleaning coating and a preparation method thereof, the specific steps of which are:

[0048] Prepare silica sol: add 2.1ml tetraethyl orthosilicate dropwise to 40ml ethanol, and stir vigorously. After 10 minutes, 2 ml of hexamethyldisilazane was added dropwise, and after 30 minutes, 3 ml of deionized water was added dropwise. Then, the whole reaction was continued to stir vigorously for another 2 hours. Then aging the obtained mixed solution at room temperature for 10 days to obtain the silica sol.

[0049] Add 0.3g of nano silicon dioxide to 10ml of aged silica sol, stir for 1h, and ultrasonically vibrate for 30min, then add the obtained solution into 10ml of ethanol, and ultrasonically vibrate for 30min to obtain a coating raw material solution.

[0050] Preparation of copper surface nanostructures: Soak the copper sheet in a mixed solution of sodium hydroxide (2.5 M) and ammonium sulfate (0.13 M) for 120 min, take i...

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Abstract

The invention discloses a dewing-frosting preventing self-cleaning coating and a preparation method thereof. The preparation method comprises the steps that (1) a silicon source is added into ethyl alcohol and stirred to be dissolved, hexamethyl disilylamine and deionized water are added, aging is conducted at the indoor temperature after continuous stirring, and silica sol is obtained; (2) nano silicon dioxide is added into the silica sol and is stirred and subjected to ultrasonic oscillation to obtain a solution, then, the solution is added into ethyl alcohol, and after ultrasonic oscillation, a coating raw material solution is obtained; (3) a base material is etched so that the base material can have a microscopic coarse structure, and the etched base material is cleaned and dried; and(4) the dried base material is soaked into the coating raw material solution for still standing, then, the dried base material is taken out and subjected to airing, and a hydrophobic dewing-frosting preventing self-cleaning coating is obtained. The coating is simple in preparation technology, low in manufacturing cost, long in service life, and capable of being applied to dewing and frosting preventing of an air conditioning system, a building glass curtain wall and aircraft wings, and has the wide application prospects in the fields of buildings, energy resources and aviation.

Description

technical field [0001] The invention belongs to the technical field of self-cleaning materials, and specifically relates to an anti-condensation and frosting self-cleaning coating and a preparation method thereof, which is prepared by modifying and etching a substrate with a low surface energy solution and surface nanoparticles to obtain an anti-condensation coating Self-cleaning material with anti-frosting properties. Background technique [0002] Condensation is a common and inevitable natural phenomenon, but the problem of condensation and frost caused by condensation sometimes brings great troubles to people's life and industrial production. In recent years, cooled roof panels have been widely used in air conditioning systems. However, the water vapor on the cold surface of the cooling roof condenses to form droplets, which grow and eventually fall off the surface by their own gravity. Condensed water dripping into the room will corrode furniture and affect people's no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D5/08B05D3/02B05D3/14B05D3/04B05D7/02B05D7/14C09D1/00
CPCB05D3/0218B05D3/0406B05D3/14B05D5/08B05D7/02B05D7/14C09D1/00
Inventor 卢浩张立志章舒圣
Owner SOUTH CHINA UNIV OF TECH
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