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Fluoride-free self-cleaning coating as well as preparation method and application thereof

A coating, selected technology, applied in coatings, chemical instruments and methods, conductive coatings, etc., can solve problems such as harsh experimental conditions, poor substrate adhesion, and difficulty in large-area application, and achieve excellent anti-corrosion performance and low cost. Low, the effect of preventing the adsorption of charged dust

Pending Publication Date: 2022-07-29
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these technologies have problems such as expensive equipment, harsh experimental conditions, complex processes, and difficulty in large-scale application.
Moreover, most superhydrophobic coatings need to introduce fluorine-containing materials, and have poor adhesion to the substrate

Method used

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  • Fluoride-free self-cleaning coating as well as preparation method and application thereof
  • Fluoride-free self-cleaning coating as well as preparation method and application thereof
  • Fluoride-free self-cleaning coating as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0073] The preparation of organosilicon modified epoxy resin specifically includes: after fully mixing and reacting 50g epoxy resin and 12.5g 3-aminopropyltriethoxysilane, adding 20g dihydroxy polydimethylsiloxane, 2.5g dihydroxypolydimethylsiloxane, 2.5g Dibutyltin laurate, and stirring to obtain silicone-modified epoxy resin.

[0074] The epoxy value of the silicone-modified epoxy resin was 0.25 mol / 100 g. Its infrared spectrum is as figure 1 shown. from figure 1 It can be seen that the wave number is 785cm -1 , 862cm -1 and 1008cm -1 It is the characteristic absorption peak of dihydroxy polydimethylsiloxane. After the reaction between epoxy resin E51 and dihydroxy polydimethylsiloxane, the positions of these two peaks have shifted; the wave number is 913cm -1 It is the symmetric stretching vibration absorption peak of the epoxy group, and the characteristic absorption peak of this group still appears in the silicone-modified epoxy resin, indicating that the prepared s...

Embodiment 1

[0076] (1) Using absolute ethanol as a solvent, prepare 100 mL of a dispersion of 5 mg / mL graphene oxide, and circulate it for 3 times under a pressure of 30,000 PSI through a high-pressure microjet to obtain a dispersion of few-layer graphene oxide.

[0077] (2) adding the dispersion of the few-layer graphene oxide obtained in step (1) into the reaction flask, gradually adding 20 mL of deionized water under stirring, adding an appropriate amount of tetraethylammonium hydroxide to adjust the pH of the solution to 9, and finally 4.6 g of tetraethyl orthosilicate was added, and after stirring and reacting at room temperature for 5 hours, the silica-loaded graphene was obtained by centrifugation and solvent washing.

[0078] (3) Disperse 0.5 g of silicon dioxide-loaded graphene prepared in step (2) in ethanol, add 5 g of dimethyldichlorosilane under stirring, slowly add 5 mL of deionized water, and stir at 70° C. for 1 hour Then, the graphene loaded with modified silica is obtain...

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Abstract

The invention discloses a fluoride-free self-cleaning coating as well as a preparation method and application thereof. The super-hydrophobicity of the coating disclosed by the invention is synergistically generated by a graphene wrinkle structure, a microstructure of nano-scale silicon dioxide and chemical modification of chlorosilane. The preparation method of the super-hydrophobic self-cleaning coating has the advantages of being environmentally friendly, simple in process, low in cost, wide in applicability and the like, and is suitable for industrial production. The coating provided by the invention has self-cleaning, antistatic, anticorrosive and antibacterial functions, and has wide application prospects in the fields of aviation, electric power, energy and the like.

Description

technical field [0001] The invention mainly relates to the technical field of coatings, and specifically designs a preparation method of a fluorine-free self-cleaning coating. Background technique [0002] In the natural state, due to the effects of gravity and static electricity, bacteria, dust, sewage and other pollutants are easily deposited on the surface of the material, which not only affects the appearance of the material, but also seriously deteriorates the durability of the material. The self-cleaning coating has special surface wettability, and can maintain its own cleanliness without human assistance through the action of natural environment such as rainwater washing and wind blowing. This not only reduces the output of human and financial resources, avoids the hidden safety hazards in the maintenance process, but also prolongs the service life of materials. Therefore, the research on self-cleaning coatings has broad application prospects and practical significan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/00C01B32/194C09D1/00C09D5/08C09D5/14C09D5/24C09D187/00
CPCC03C17/009C01B32/194C09D1/00C09D187/005C09D5/24C09D5/08C09D5/14C03C2217/76C03C2218/11
Inventor 郑龙辉吴立新李国高沈莹缪佳涛翁子骧
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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