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Modified nano titanium dioxide self-cleaning coating and preparation method thereof

A nano-titanium dioxide, self-cleaning technology, applied in antifouling/underwater coatings, coatings, paints containing biocides, etc., can solve the problem of reducing the photocatalytic activity of titanium dioxide films, dispersing nano-titanium dioxide is not uniform enough, and affecting the self-cleaning effect of products and other problems, to achieve the effect of enhancing the visible light response, broadening the light response range, and improving the photocatalytic efficiency.

Active Publication Date: 2017-02-08
ZHEJIANG RUNYANG NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, nano-titanium dioxide has a large specific surface area, high surface energy, and a hydrophilic and oleophobic surface. It is very easy to agglomerate in the polymer. The agglomeration will greatly reduce the performance of titanium dioxide, reduce the photocatalytic activity of the titanium dioxide film, and then affect the self-cleaning ability.
The publication number is CN105111401A, which discloses a nano-titanium dioxide self-cleaning coating, but the dispersion of nano-titanium dioxide in this coating is not uniform enough, and it is easy to agglomerate, which affects the self-cleaning effect of the product

Method used

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  • Modified nano titanium dioxide self-cleaning coating and preparation method thereof
  • Modified nano titanium dioxide self-cleaning coating and preparation method thereof

Examples

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Effect test

Embodiment 1

[0038] A modified nano-titanium dioxide self-cleaning coating, in parts by mass, whose raw materials include the following components:

[0039] Boron nitrogen doped coated nano-titanium dioxide 1.5

[0040] tert-butyl methacrylate 15

[0041] Sodium Lauryl Sulfate 2

[0042] Cetyl alcohol 0.5

[0043] Potassium persulfate 0.3

[0044] Deionized water 50

[0045] Vinyltrimethoxysilane coupling agent 0.5

[0046]The preparation method of the above-mentioned self-cleaning coating is as follows: in parts by mass, 1.5 parts of the prepared boron-nitrogen-doped and coated nano-titanium dioxide are added to an aqueous ethanol solution, and fully dispersed under strong stirring; 0.5 parts of vinyltrimethoxysilane coupling agent, magnetic stirring and heat preservation reaction for 1 hour, cooled to normal temperature, suction filtration, drying, and grinding to obtain silanized boron-nitrogen-doped nano-titanium dioxide; 1.5 parts of silylated boron-nitrogen Dope and coat nano-t...

Embodiment 2

[0050] A modified nano-titanium dioxide self-cleaning coating, in parts by mass, whose raw materials include the following components:

[0051] Boron and nitrogen doped coated nano-titanium dioxide 3

[0052] Hydroxyethyl Acrylate 25

[0053] Tween 80 6

[0054] n-Pentanol 2

[0055] Hydrogen peroxide 0.6

[0056] Deionized water 90

[0057] Vinyltriethoxysilane coupling agent 2.5

[0058] The preparation method of the above-mentioned nano-titanium dioxide self-cleaning coating is as follows: in parts by mass, 3 parts of the prepared boron-nitrogen-doped coated nano-titanium dioxide are added to an aqueous ethanol solution, and fully dispersed under strong stirring; Add 2.5 parts of vinyltriethoxysilane coupling agent to the mixture, and after magnetic stirring and heat preservation for 3 hours, cool to normal temperature and suction filter, dry and grind to obtain silanized boron-nitrogen-doped nano-titanium dioxide; 3 parts of silane Boron nitrogen doped coated nano-ti...

Embodiment 3

[0062] A modified nano-titanium dioxide self-cleaning coating, in parts by mass, whose raw materials include the following components:

[0063] Boron and nitrogen doped coated nano-titanium dioxide 2

[0064] 2-ethyl acrylate 20

[0065] Polyoxyethylene sorbitan trioleate 4

[0066] Hexadecane 1.5

[0067] Ammonium persulfate 0.5

[0068] Deionized water 70

[0069] Vinyl tris(2-methoxyethoxy)silane coupling agent 1.5

[0070] The preparation method of the above-mentioned modified nano-titanium dioxide self-cleaning coating is as follows: in parts by mass, 2 parts of the prepared boron-nitrogen-doped coated nano-titanium dioxide are added to an aqueous ethanol solution, and fully dispersed under strong stirring; Add 1.5 parts of vinyl tris (2-methoxyethoxy) silane coupling agent to the dispersion liquid, after 2 hours of magnetic stirring and heat preservation reaction, cool to normal temperature and suction filter, dry and grind to obtain silanized boron nitrogen doped ...

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Abstract

The invention belongs to the technical field of chemical coatings, and in particular, relates to a modified nano titanium dioxide self-cleaning coating and a preparation method thereof. The preparation method comprises the following steps: adding 1.5-3 parts of boron and nitrogen doped and coated nano titanium dioxide into an ethanol aqueous solution, stirring and dispersing, adding 0.5-2.5 parts of an organic silane coupling agent, carrying out stirring and heat preservation reaction, then carrying out suction filtration, drying and grinding to obtain silanized boron and nitrogen doped and coated nano titanium dioxide; dispersing 1.5-3 parts of the silanized boron and nitrogen doped and coated nano titanium dioxide into a mixed solution of 15-25 parts of an acrylate monomer and 0.5-2 parts of a co-emulsifier, stirring, carrying out ultrasonic dispersion, then adding 2-6 parts of an emulsifier and 50-90 parts of deionized water, stirring, carrying out ultrasonic dispersion, adding 0.3-0.6 part of an initiator, and carrying out heat preservation for 3-5 h, to obtain the modified nano titanium dioxide self-cleaning coating. The self-cleaning coating has the advantages of good dispersion of titanium dioxide and strong self-cleaning ability.

Description

technical field [0001] The invention belongs to the technical field of chemical coatings, in particular to a modified nano-titanium dioxide self-cleaning coating [0002] materials and their preparation methods. Background technique [0003] With the rapid development of my country's construction industry, building walls are favored by architects because of their advantages such as windproof, rainproof, heat preservation, heat insulation, noise prevention, air penetration resistance and decoration. But the way it's cleaned hasn't changed in any way. Manual cleaning is neither convenient nor safe. In addition, long-term use of cleaning agents not only wastes resources, but also pollutes the environment, which is not in line with the current environmental protection and conservation policies advocated by the state. Therefore, research on the preparation of self-cleaning building walls has become a hot topic. [0004] Studies have shown that titanium dioxide has functions s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/10C09D133/14C09D133/08C09D133/12C09D5/16C09D7/12
CPCC08K3/22C08K9/02C08K9/04C08K9/06C08K9/10C08K2003/2241C08K2201/011C09D5/1668C09D5/1687C09D133/08C09D133/10C09D133/12C09D133/14
Inventor 张镤
Owner ZHEJIANG RUNYANG NEW MATERIAL TECH
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