Transparent super-hydrophobic coating material and method for preparing transparent super-hydrophobic coating by transparent super-hydrophobic coating material

A super-hydrophobic coating, transparent technology, applied in coatings, polyurea/polyurethane coatings, devices for coating liquids on surfaces, etc., can solve the problem that super-hydrophobic coatings cannot achieve transparency, durability and erasability and repeated coating, temperature and pH stability, droplet impact resistance, versatility, etc., to achieve the effect of simple and convenient preparation method

Active Publication Date: 2015-03-25
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The technical problem to be solved by the present invention is to overcome the inability of existing superhydrophobic coating preparation methods to simultaneously obtain transparency, durability, erasability and recoatability, temperature and pH stability, droplet impact resis

Method used

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  • Transparent super-hydrophobic coating material and method for preparing transparent super-hydrophobic coating by transparent super-hydrophobic coating material
  • Transparent super-hydrophobic coating material and method for preparing transparent super-hydrophobic coating by transparent super-hydrophobic coating material
  • Transparent super-hydrophobic coating material and method for preparing transparent super-hydrophobic coating by transparent super-hydrophobic coating material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] 1. Weigh 0.2g fumed silica nanoparticles (specific surface area is 300m 2 / g) and 20g of absolute ethanol, the fumed silica nanoparticles are dispersed in ethanol by magnetic stirring and an ultrasonic disperser to obtain a uniform and stable dispersion.

[0071] 2. Cut out a textile cloth of a certain size, and soak the textile cloth with the dispersion liquid in step 1. Wipe the glass surface with the woven cloth.

[0072] 3. After the ethanol is completely volatilized, put the wiped glass and 200 μL of 1H,1H,2H,2H-perfluorodecyltriethoxysilane into a closed desiccator and heat it. Incubate at 180°C for 3h. The glass is then taken out of the desiccator to obtain a superhydrophobic coating.

[0073] SEM observation showed that the coating had a porous microstructure ( figure 2 ). The contact angle of the superhydrophobic coating to the droplet is measured by a contact angle tester to be 165.7 ° ( image 3 ), the roll angle is 1°. Figure 4 It shows that the sup...

Embodiment 2

[0075] 1. Weigh 0.2g fumed silica nanoparticles (specific surface area is 100m 2 / g) and 20g of water, the fumed silica nanoparticles are dispersed in water by magnetic stirring and ultrasonic disperser to prepare a uniform and stable dispersion.

[0076] 2. Cut out a non-woven fabric of a certain size, soak the non-woven fabric with the dispersion in step 1, and then wipe it on the glass surface.

[0077]3. After the water is completely evaporated, put the coated glass and 200 μL of 1H,1H,2H,2H-perfluorodecyltriethoxysilane into a closed desiccator and heat it. Incubate at 100°C for 3h. The glass is then removed from the desiccator to produce a superhydrophobic coating.

[0078] The superhydrophobic coating has a contact angle of 162.1° and a rolling angle of 2°. Other properties such as transparency, self-cleaning ability, etc. are the same as in Example 1.

Embodiment 3

[0080] 1. Weigh 0.1g fumed silica nanoparticles (specific surface area is 600m 2 / g) and 50g of absolute ethanol, the fumed silica nanoparticles were dispersed in ethanol by magnetic stirring and ultrasonic disperser to prepare a uniform and stable dispersion.

[0081] 2. Cut out a textile cloth of a certain size, soak the textile cloth with the dispersion in step 1, and then wipe the glass surface.

[0082] 3. After the ethanol is completely volatilized, put the coated glass and 200 μL of 1H,1H,2H,2H-perfluorodecyltriethoxysilane into a closed desiccator and heat it. Incubate at 160°C for 3h. The glass is then removed from the desiccator to produce a superhydrophobic coating.

[0083] The superhydrophobic coating has a contact angle of 168.5° and a rolling angle of 2°. Transparency is better than Example 1.

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Abstract

The invention discloses a transparent super-hydrophobic coating material. The raw materials of the transparent super-hydrophobic coating material comprise gas-phase silica nano-particle dispersion liquid which consists of gas-phase silica nano-particles and a solvent, and a hydrophobic treating agent. The invention further discloses a preparation method of a transparent super-hydrophobic coating; a coating of a micro-nano structure is prepared by rubbing and coating a substrate with the gas-phase silica nano-particle dispersion liquid, and then the coating is subjected to surface hydrophobization treatment by the hydrophobic treating agent to obtain the transparent super-hydrophobic coating. According to the super-hydrophobic coating material provided by the invention, hydrophobization treatment manners can be changed flexibly according to the difference of coated substrates; the method for preparing the super-hydrophobic coating has low requirement on equipment; the using cost is extremely low; the method is simple; the coating application is convenient; a large-area high-efficiency super-hydrophobic coating can be prepared; the prepared super-hydrophobic has excellent super-hydrophobicity, high transparency, droplet impact resistance, temperature and pH stability, durability, and repeated rubbing and coating capacity, and can be applied to almost all currently known solid surfaces.

Description

technical field [0001] The present invention relates to the technical field of hydrophobic coating materials, in particular to a hydrophobic coating material that has both optical transparency, durability, droplet impact resistance, temperature and pH stability, renewability, and can be applied to the surface of various materials. Transparent superhydrophobic materials and coatings prepared therefrom. Background technique [0002] Many biological surfaces in nature have special surface wetting behavior. The researchers found that the contact angles greater than 150° could be obtained by putting water droplets on the upper surface of lotus leaves, rice leaves, and water strider feet. Such surfaces exhibiting super-wetting resistance to water droplets are called superhydrophobic surfaces. After further scientific research, it was found that these biological surfaces all have rough structures on a microscopic scale. These microstructures prevent water droplets from completely...

Claims

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Application Information

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IPC IPC(8): C09D183/04C09D183/08C09D133/16C09D175/04C09D7/12B05D5/08B05D7/24
Inventor 杜淼李房郑强
Owner ZHEJIANG UNIV
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