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Super-hydrophobic coating with self-cleaning and organic pollutant degradation functions and preparation method of super-hydrophobic coating

A technology for super-hydrophobic coatings and organic pollutants, applied in coatings and other directions, can solve the problems of skin, eye irritation, corrosive ammonia water, complicated preparation process, etc., and achieve high surface hydroxyl content, high safety performance, microporous many effects

Inactive Publication Date: 2020-11-03
几何智慧城市科技(广州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the existing superhydrophobic coating preparation methods, although superhydrophobic coatings with self-cleaning functions can be prepared, the preparation process is relatively complicated, and in the production process, it needs to be modified with fluorine-containing compounds and treated with ammonia water. The fluorine-containing compounds contain Toxicity, ammonia water is corrosive, long-term use will be irritating to the skin and eyes of the human body, inhalation will lead to poisoning, and there is a certain danger

Method used

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  • Super-hydrophobic coating with self-cleaning and organic pollutant degradation functions and preparation method of super-hydrophobic coating
  • Super-hydrophobic coating with self-cleaning and organic pollutant degradation functions and preparation method of super-hydrophobic coating
  • Super-hydrophobic coating with self-cleaning and organic pollutant degradation functions and preparation method of super-hydrophobic coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Preparation of superhydrophobic coatings:

[0036] Take 50mL of ethanol, add 10g of hydrophobic silicon dioxide powder and 1.0g of silicone acrylic acid, stir and ultrasonically disperse for 5min until the mixture is uniform, and obtain solution A;

[0037] Take another 50mL of absolute ethanol, add 3g of nano-titanium dioxide and 0.1g of dispersant, stir evenly to obtain solution B;

[0038] Add solution B dropwise to solution A at a rate of 0.5 mL / min, and continue stirring for 2 hours after the dropwise addition to form a milky white liquid.

[0039] The milky white liquid was left to stand for 24 hours, and then dried in an oven at 50-60°C for 12 hours to obtain a dried gel;

[0040] The dried gel was pulverized with a mortar, placed in a muffle furnace and calcined for 2 hours to obtain the superhydrophobic coating of Example 1.

Embodiment 2

[0042] Take 50mL of ethanol, add 10g of hydrophobic silicon dioxide powder and 1.5g of n-butyl ester, stir and ultrasonically disperse for 8 minutes until the mixture is uniform, and obtain solution A;

[0043] Take another 60mL of absolute ethanol, add 3g of nano-titanium dioxide and 0.3g of dispersant, stir evenly to obtain solution B;

[0044] Add solution B dropwise to solution A at a rate of 0.5 mL / min, and continue stirring for 2 hours after the dropwise addition to form a milky white liquid.

[0045] The milky white liquid was left to stand for 24 hours, and then dried in an oven at 50-60°C for 12 hours to obtain a dried gel;

[0046] The dried gel was pulverized with a mortar, placed in a muffle furnace and calcined for 2 hours to obtain the superhydrophobic coating of Example 2.

Embodiment 3

[0048] Take 48mL of ethanol, add 10g of hydrophobic silica powder and 1.2g of dodecyl alcohol ester, stir and ultrasonically disperse for 8 minutes until the mixture is uniform, and obtain solution A;

[0049] Take another 60mL of absolute ethanol, add 4g of nano-titanium dioxide and 0.2g of dispersant, stir evenly to obtain solution B;

[0050] Add solution B dropwise to solution A at a rate of 0.5 mL / min, and continue stirring for 2 hours after the dropwise addition to form a milky white liquid.

[0051] The milky white liquid was left to stand for 24 hours, and then dried in an oven at 50-60°C for 12 hours to obtain a dried gel;

[0052] The dried gel was pulverized with a mortar, placed in a muffle furnace and calcined for 2 hours to obtain the superhydrophobic coating of Example 3.

[0053] The hydrophobic performance of the transparent superhydrophobic material prepared in the embodiment of the present invention was characterized by using an integral inclined contact an...

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Abstract

The invention relates to a super-hydrophobic coating with self-cleaning and organic pollutant degradation functions and a preparation method of the super-hydrophobic coating. The preparation method comprises the following steps: (1) dissolving hydrophobic silicon dioxide and a film-forming agent into an alcohol solvent at normal temperature, and uniformly stirring the mixture under ultrasonic waves to obtain a solution A; (2) adding nano titanium dioxide and a dispersing agent into absolute ethyl alcohol, and uniformly stirring the mixture to obtain a solution B; (3) dropwise adding the solution B into the solution A, and stirring the mixture for 2-3 hours after dropwise adding to form milky white liquid; (4) standing the milky white liquid for 18-24 hours, and drying the milky white liquid in a drying oven to obtain dried gel; and (5) grinding the dried gel, and calcining the ground gel in a muffle furnace to obtain the super-hydrophobic coating. The preparation method is simple in process and mild in reaction condition, fluorine-containing compound modification and ammonia water treatment are not needed, the safety performance is higher, and the prepared super-hydrophobic coatingnot only has a self-cleaning function, but also can degrade indoor organic pollutants.

Description

technical field [0001] The invention relates to the field of superhydrophobic materials, more specifically, it relates to a superhydrophobic coating capable of self-cleaning and degrading organic pollutants and a preparation method thereof. Background technique [0002] With the rapid development of my country's economy and the continuous improvement of urbanization, people's living standards continue to improve, and their lifestyles are gradually changing. People's awareness of the health of the office and home environment is increasing. [0003] Most of the building materials currently used are hydrophilic materials, and their hydrophilic characteristics will mainly cause the following hazards to buildings: On the one hand, harmful ions such as chloride ions and sulfate ions penetrate into the structure to cause erosive damage and reduce Its service life; on the other hand, it is easy to be attached by inorganic or organic stains such as dust and oil stains, and it is more...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D7/61C09D7/63C09D7/65
CPCC09D1/00C09D7/61C09D7/63C09D7/65
Inventor 闫志强石罡周凌杰欧阳芳
Owner 几何智慧城市科技(广州)有限公司
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