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A titanium dioxide-organic composite self-cleaning coating with high light transmittance and durable superhydrophilicity and its mild preparation method

A titanium dioxide, composite coating technology, applied in coatings, antifouling/underwater coatings, paints containing biocides, etc., can solve the problems of low light transmittance, super hydrophilicity can not be maintained for a long time, and achieve high transparency The effect of light rate, long-lasting super hydrophilicity, not easy to scratch and fail

Active Publication Date: 2021-04-02
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the shortcomings of existing superhydrophilic coatings, such as the inability to maintain superhydrophilicity for a long time, low light transmittance, and the need for high-temperature heating treatment during preparation, and provides a titanium dioxide-organic coating with long-lasting superhydrophilicity and high transparency. Composite self-cleaning coating and its mild preparation method

Method used

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  • A titanium dioxide-organic composite self-cleaning coating with high light transmittance and durable superhydrophilicity and its mild preparation method
  • A titanium dioxide-organic composite self-cleaning coating with high light transmittance and durable superhydrophilicity and its mild preparation method
  • A titanium dioxide-organic composite self-cleaning coating with high light transmittance and durable superhydrophilicity and its mild preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Add 0.5 g of titanium dioxide nanoparticles with a particle size of 10 nm to 4 mL of ethanolamine at room temperature and magnetic stirring, react for 4 hours, centrifuge to obtain a solid, wash it twice with ethyl acetate, and place it in a vacuum oven at 25 ° C. After standing for 12 hours, the modified titanium dioxide solid powder was obtained. Next, add 0.1 g of modified titanium dioxide to 2.0 g of hydroxyethyl acrylate monomer, ultrasonically disperse the modified titanium dioxide for 20 minutes with a power of 50 W to form a translucent uniform dispersion, add 0.021 g of photoinitiator 1173, A uniformly dispersed titanium dioxide-organic composite coating prepolymer solution with a mass fraction of 5% titanium dioxide was obtained.

[0040] (2) Sonicate a glass sheet with a length of 3.0 cm and a width of 3.0 cm in deionized water, ethanol, and acetone at a power of 50 W for 20 min to remove organic impurities on the surface. Fix the dried glass sheet on a ...

Embodiment 2

[0043] (1) Add 0.5 g of titanium dioxide nanoparticles with a particle size of 10 nm to 6 mL of diethanolamine at room temperature and magnetic stirring, react for 3 hours, centrifuge to obtain a solid, wash it twice with ethyl acetate, and put it in a vacuum oven at 25 ° C. Place in the middle for 12h to obtain modified titanium dioxide solid powder. Next, add 0.22 g of modified titanium dioxide to 2.0 g of hydroxyethyl methacrylate monomer, ultrasonicate for 30 minutes with a power of 60 W until the modified titanium dioxide is completely dispersed to form a translucent uniform dispersion, and add 0.022 g of photoinitiator 184, to obtain a uniformly dispersed titanium dioxide-organic composite coating pre-polymerization solution with a mass fraction of titanium dioxide of 10%.

[0044] (2) Sonicate a glass sheet with a length of 3.0 cm and a width of 3.0 cm in deionized water, ethanol, and acetone at a power of 60 W for 20 min to remove organic impurities on the surface. Fi...

Embodiment 3

[0047] (1) Add 0.5 g of titanium dioxide nanoparticles with a particle size of 10 nm into 8 mL of triethanolamine under room temperature and magnetic stirring, react for 6 h, centrifuge to obtain a solid, wash twice with ethyl acetate, and place in a vacuum oven at 25 ° C Place in the middle for 12h to obtain modified titanium dioxide solid powder. Next, add 0.35 g of modified titanium dioxide to 2.0 g of hydroxypropyl acrylate monomer, and ultrasonically disperse the modified titanium dioxide for 40 minutes with a power of 120 W to form a translucent uniform dispersion. Add 1 mass part (0.023 g) of The photoinitiator 907 is used to obtain a uniformly dispersed titanium dioxide-organic composite coating prepolymer solution with a mass fraction of titanium dioxide of 15%.

[0048] (2) Sonicate a glass sheet with a length of 3.0 cm and a width of 3.0 cm in deionized water, ethanol, and acetone at a power of 120 W for 20 min to remove organic impurities on the surface. The dried...

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Abstract

The invention discloses a titanium dioxide-organic compound self-cleaning coating with high transparency and durable super hydrophily and a mild preparation method thereof. The coating overcomes the defects that the super hydrophily of an existing super hydrophilic coating cannot be maintained for a long time, and the super hydrophilic coating is low in transparency, needs to be treated at a hightemperature if being prepared and the like. The mild preparation method comprises the following steps: directly dispersing modified titanium dioxide in an acrylate monomer; and then carrying spinningand ultraviolet curing to obtain the titanium dioxide-organic compound at room temperature. The transparency of the titanium dioxide-organic compound prepared by the method is greater than 90%, the water contact angle can be reduced to below 3 degrees within 0.45 s, and the super hydrophily can be maintained for over 6 months. Organic pollutants on the surface of the titanium dioxide-organic compound self-cleaning coating can be decomposed and adsorbed catalytically, and the hardness through a pencil hardness test (GB / T6739-2006) is greater than 5H. The preparation processes are carried out inroom temperature condition, so that the preparation method is suitable for various base materials, for example, glass, metals, ceramic, various synthesized resin base materials and the like.

Description

technical field [0001] The invention relates to a superhydrophilic material, in particular to a titanium dioxide-organic composite self-cleaning coating with high light transmittance and long-lasting superhydrophilicity and a mild preparation method thereof. Background technique [0002] A superhydrophilic surface generally refers to a surface that has a strong affinity for water when the contact angle drops rapidly to less than 5° within 0.5s when a water droplet contacts the surface. The superhydrophilic property endows the surface with anti-fogging and self-cleaning abilities since water spreads completely as a water film on the superhydrophilic surface instead of in the form of droplets. Superhydrophilic surfaces have great potential application value in many fields, such as anti-fog film, self-cleaning coating, oil-water separation membrane, anti-bioadhesion coating, microfluidic device, heat exchange device, water drag reduction equipment, etc. . [0003] However, du...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D4/02C09D5/16C08J7/06C03C17/00C04B41/50B05D7/14B05D7/24
CPCB05D7/14B05D7/24B05D2202/15C03C17/009C03C2217/445C03C2217/477C03C2218/116C03C2218/32C04B41/009C04B41/5041C08J7/06C08J2367/02C09D4/00C09D5/1687C04B35/10C04B41/4535C04B41/483C04B41/0045
Inventor 张淑芬张业广牛文斌武素丽
Owner DALIAN UNIV OF TECH