Antireflection type super-hydrophilic zinc oxide/titanium dioxide composite nanometer structure self-cleaning coating and preparation method thereof

A composite nanostructure, self-cleaning coating technology, applied in the field of chemical materials, can solve problems such as increasing the air-transparent substrate interface

Active Publication Date: 2014-07-16
JIANGSU SHIKEXINCAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to TiO 2 Has a high refractive index, anatase is 2.52, rutile is 2.76, dense TiO 2 Self-cleaning coating will increase reflection at the air-transparent substrate interface

Method used

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  • Antireflection type super-hydrophilic zinc oxide/titanium dioxide composite nanometer structure self-cleaning coating and preparation method thereof
  • Antireflection type super-hydrophilic zinc oxide/titanium dioxide composite nanometer structure self-cleaning coating and preparation method thereof
  • Antireflection type super-hydrophilic zinc oxide/titanium dioxide composite nanometer structure self-cleaning coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] ① Preparation of ZnO seed layer: Add equivalent ethanolamine to 0.2mol / L zinc acetate ethanol solution. The solution was spin-coated on a clean FTO conductive glass substrate at 3000 rpm. The substrate was then calcined at 400°C for 30 minutes.

[0036] ②Growth of ZnO nanowire array: prepare 20mmol / L zinc nitrate aqueous solution, and add equimolar hexamethylenetetramine to the zinc nitrate solution. Submerge the substrate prepared in ① into the above solution and keep the substrate upright. The reaction system was placed in a constant temperature oven at 70° C. for 4 hours to obtain a ZnO nanowire array with a diameter of about 400 nanometers.

[0037] ③ZnO / TiO 2 Composite nanostructure film: The substrate prepared in ② with ZnO nanowire array grown upright in the hydrothermal reaction kettle, add 10mL isopropanol solution of titanate in the reaction kettle, the concentration of titanate in the solution to 5 mmol / L, add 10 microliters of diethylenetriamine. The ab...

Embodiment 2

[0040] ① Preparation of ZnO seed layer: Add equivalent amount of ethylamine to 0.1mol / L zinc acetate ethanol solution. The solution was spin-coated on a clean FTO conductive glass substrate at 2000 rpm. The substrate was then calcined at 400°C for 50 minutes.

[0041] ②Growth of ZnO nanowire array: prepare 30mmol / L zinc nitrate aqueous solution, and add equimolar hexamethylenetetramine to the zinc nitrate solution. Submerge the substrate prepared in ① into the above solution and keep the substrate upright. The reaction system was placed in a constant temperature oven at 70° C. for 6 hours to obtain a ZnO nanowire array with a diameter of about 450 nanometers.

[0042] ③ZnO / TiO 2 Composite nanostructure film: The substrate prepared in ② with ZnO nanowire arrays grown upright in a hydrothermal reaction kettle was added to the reaction kettle with 15mL of isopropanol solution of titanate, the concentration of titanate in the solution To 10mmol / L, add 10 microliters of triethy...

Embodiment 3

[0044] ① Preparation of ZnO seed layer: Add equivalent ethylenediamine to 0.3mol / L zinc acetate ethanol solution, spin-coat the solution on a clean substrate at 3000rpm, and then calcinate the substrate at 500°C for 60 minute;

[0045] ②Growth of ZnO nanowire array: prepare 50mmol / L zinc nitrate aqueous solution, and add equimolar hexamethylenetetramine to the zinc nitrate solution; immerse the substrate prepared in step ① in the above solution, keep the substrate The sheet was upright; the reaction system was placed in a constant temperature oven at 90°C for 2 hours to obtain a ZnO nanowire array with a thickness of 500 nm;

[0046] ③ZnO / TiO 2 Composite structure nano film: the substrate prepared in step ② with ZnO nanowire array grown upright in the hydrothermal reaction kettle, add 20mL isopropanol / water (1:1) solution of titanyl sulfate in the reaction kettle , the concentration of titanyl sulfate in the solution is 50mmol / L, and then add 40 microliters of tetraethylenep...

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Abstract

The present invention relates to an antireflection type super-hydrophilic zinc oxide/titanium dioxide composite nanometer structure self-cleaning coating and a preparation method thereof. According to the present invention, a hydrothermal method is adopted to grow a layer of 300-800 nm ZnO nano-wire array structure film on the surface of a substrate, a layer of a TiO2 nanometer thin sheet grows on the surface of the ZnO, and a lot of gaps exist between the nano-wire lattices, such that the film has a certain antireflection characteristic, wherein the transmittance is increased to more than 85% of the substrate transmittance from 80% of the substrate transmittance, the contact angle of the ZnO nano-wire array is reduced to about 10 DEG from the original 60 DEG with introduction of the TiO2 layer, and more importantly the TiO2 layer can be provided for effectively degrading the organic pollutants attached on the surface under sunlight so as to achieve the self-cleaning effect; and the preparation method has characteristics of simple process, easily available materials and low cost, and the coating is suitable for automotive, aircraft windshields, lenses, building curtain walls and glasses, and other occasions.

Description

technical field [0001] The invention relates to a preparation method of a super-hydrophilic zinc oxide / titanium dioxide core-shell nanostructure self-cleaning coating with antireflection, belonging to the technical field of chemical materials. Background technique [0002] Self-cleaning coatings have received increasing attention in recent years. Currently, two types of self-cleaning coatings have been developed based on different self-cleaning principles. One is the superhydrophobic coating of the bionic lotus leaf, which has a large water contact angle and a small water rolling angle. The contact angle can exceed 150 degrees. The dust is rolled away by the water droplets, and the self-cleaning function similar to that of the lotus leaf is realized. However, there are many kinds of pollutants in the actual air environment, including hydrophilic dust pollutants, lipophilic organic pollutants and a mixture of various pollutants. The existing super-hydrophobic coating cannot ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/85C03C17/23
Inventor 孙再成王明华徐静涛李国栋
Owner JIANGSU SHIKEXINCAI CO LTD
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