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Organic polysilazane/inorganic nano-material super-hydrophobic coating and preparation method thereof

A technology of inorganic nanomaterials and super-hydrophobic coatings, applied in coatings, anti-corrosion coatings, fire-resistant coatings, etc., can solve the problems of difficult removal of catalysts, research and application limitations, cumbersome processes, etc., and achieve good mechanical and chemical stability, The effect of widening the application field and simple preparation process

Active Publication Date: 2016-12-07
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method uses hydrosilylation reaction to carry out fluorination modification of organopolysilazane, the process is cumbersome, the cost is high, and the catalyst remaining in the product is difficult to remove; on the other hand, because organopolysilazane is extremely It is easy to react with water vapor in the air, and the reaction process requires strict anhydrous conditions, which undoubtedly increases the requirements for equipment, which limits its research and application.

Method used

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  • Organic polysilazane/inorganic nano-material super-hydrophobic coating and preparation method thereof
  • Organic polysilazane/inorganic nano-material super-hydrophobic coating and preparation method thereof
  • Organic polysilazane/inorganic nano-material super-hydrophobic coating and preparation method thereof

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Effect test

Embodiment 1

[0034] (1) Preparation of hydrophobic inorganic nanomaterial dispersion: 1.0g SiO 2 Nanoparticles were ultrasonically dispersed in 4.0 g of absolute ethanol to obtain SiO with a mass fraction of 20 wt%. 2 Dispersion; add 0.4 g heptadecafluorodecyltriethoxysilane and 2.0 g isopropyl orthosilicate to SiO 2 In the dispersion liquid, adjust its pH value to 8 by adding ammonia water; react at 30°C for 36 hours to obtain hydrophobic SiO 2 nanoparticle dispersion.

[0035] (2) Preparation of organopolysilazane / inorganic nanomaterial layer-by-layer superhydrophobic coating: dissolve organopolysilazane in tetrahydrofuran to obtain a tetrahydrofuran solution containing 10wt% organopolysilazane; then, Spray 2.0mL of tetrahydrofuran solution of organopolysilazane on the glass surface, and after the solvent evaporates, spray 2.0mL of hydrophobic SiO on the surface 2 Nanoparticle dispersion; take the above spraying process as a cycle, repeat this cycle 5 times; finally, heat-cure the obt...

Embodiment 2

[0043] (1) Preparation of hydrophobic inorganic nanomaterial dispersion: ultrasonically disperse 0.1g graphene oxide in 9.9g propylene glycol to obtain a graphene oxide dispersion with a mass fraction of 0.1wt%; Oxysilane and 10.0 g of butyl orthosilicate were added to the graphene oxide dispersion, and the pH was adjusted to 12 by adding ammonia water; reacted at 50° C. for 20 hours to obtain a hydrophobic graphene oxide dispersion.

[0044] (2) Preparation of organopolysilazane / organopolysilazane / inorganic nanomaterial layer-by-layer assembly of superhydrophobic coating: dissolve organopolysilazane in dimethyl sulfoxide to obtain dimethyl sulfoxide containing 12wt% organopolysilazane sulfoxide solution; then, spin-coat 2.0mL organopolysilazane dimethyl sulfoxide solution on the surface of the PET film, and then spin-coat 2.0mL hydrophobic graphene oxide dispersion on the surface after the solvent evaporates ; take the above spin coating process as a cycle, repeat this cycle ...

Embodiment 3

[0050] (1) Preparation of hydrophobic inorganic nanomaterial dispersion: ultrasonically disperse 1.5g montmorillonite in 1.0g isopropanol to obtain a montmorillonite dispersion with a mass fraction of 60wt%; Ethoxysilane and 1.5 g of propyl orthosilicate were added to the montmorillonite dispersion, and the pH was adjusted to 9 by adding ammonia water; reacted at 60° C. for 12 hours to obtain a hydrophobic montmorillonite dispersion.

[0051] (2) Preparation of organopolysilazane / inorganic nanomaterial layer-by-layer superhydrophobic coating: dissolve organopolysilazane in butyl acetate to obtain a butyl acetate solution containing 40wt% organopolysilazane Then, the butyl acetate solution of 2.0mL organopolysilazane is scraped on the surface of the copper sheet, and after the solvent volatilizes, further scrape the hydrophobic montmorillonite dispersion of 2.0mL on its surface; with the above-mentioned scraping process One cycle is repeated once; finally, the obtained coating ...

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Abstract

The invention discloses an organic polysilazane / inorganic nano-material super-hydrophobic coating and a preparation method thereof. According to the preparation method, firstly, an organic polysilazane solution is prepared, a silane coupling agent containing hydrophobic units is used for carrying out hydrophobization on an inorganic nano-material, and dispersion liquid of the hydrophobic inorganic nano-material is prepared; then, an organic material or an inorganic material or a metal material serves as a base material, and an organic polysilazane and the hydrophobic inorganic nano-material alternatively deposit on the surface of the base material in sequence through a deposition method; finally, appropriate heat treatment is carried out on the surface which is subjected to multiple times of alternative deposition. The obtained coating shows good super-hydrophobic performance, the contact angles of water drops on the surface of the coating are larger than 150 degrees, the rolling angles are smaller than 10 degrees, and the coating has good mechanical and chemical stability and has wide application prospect in the field of waterproof clothes, exterior wall coating, oil-water separation, biomedicine and the like. According to the method, the preparation process is simple, and large hydrophobic coatings can be established on various base material surfaces.

Description

technical field [0001] The invention belongs to the technical field of super-hydrophobic coatings, in particular to a super-hydrophobic coating based on organopolysilazane / inorganic nanomaterial layer-by-layer assembly and a preparation method thereof. Background technique [0002] A superhydrophobic surface generally refers to a surface on which a water droplet has a contact angle greater than 150° and a rolling angle less than 10°. It has excellent properties such as self-cleaning, anti-adhesion, anti-fog and antibacterial, waterproof, etc., which has attracted great attention and research interest. With the improvement of production and living standards, people pay more and more attention to the pursuit of quality of life, which makes super-hydrophobic materials show great promise in waterproof clothing, exterior wall coatings, electronic components, pipeline microflow, oil-water separation, biomedical and other fields. Wide application prospects. However, the current p...

Claims

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Application Information

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IPC IPC(8): C09D183/16C09D5/08C09D7/12C09D1/00B05D7/24
CPCC09D7/62C09D183/16C08K3/04C08K3/22C08K3/346C08K3/36C08K9/06C09D1/00C09D5/08C09D5/18B05D7/24B05D7/54B05D2518/10B05D2601/22B05D2601/24B05D2601/20B05D2451/00C08K2201/011C08K2003/2241B05D2401/10B05D2420/01B05D2420/02
Inventor 陈志锋李光吉林晓彬吴怀远王立莹林殷雷
Owner SOUTH CHINA UNIV OF TECH
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