Superhydrophobicity coating based on waterborne emulsion and preparing method and application thereof

A super-hydrophobic coating, water-based emulsion technology, applied in antifouling/underwater coatings, anti-corrosion coatings, polyurea/polyurethane coatings, etc., can solve problems such as unfavorable production applications, achieve large-scale industrial production, simple steps, Easy-to-control effects

Active Publication Date: 2017-02-22
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to address the above existing problems, to provide a water-based emulsion-based superhydrophobic coating and its preparation method and application. The preparation method reduces the impact of VOC solvents on the resource environment, and at the same time solves the problem of multi-step synthesis through simple one-step compounding. It is not conducive to the problems of actual production and application, so as to obtain an environmentally friendly, low-cost, and simple-to-prepare superhydrophobic coating, which has broad application prospects in stain resistance and corrosion resistance.

Method used

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  • Superhydrophobicity coating based on waterborne emulsion and preparing method and application thereof
  • Superhydrophobicity coating based on waterborne emulsion and preparing method and application thereof
  • Superhydrophobicity coating based on waterborne emulsion and preparing method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] The aqueous silicon acrylic emulsion with a solid content of 38% was diluted with ethanol to a solid content of 10%. Add 3 g of a mixture of nano-silica particles with diameters of 14 nm and 50 nm (mass ratio: 3:1) into 5 mL of ethanol, and sonicate for 15 min to obtain a uniform dispersion. Add 20 mL of ethanol-diluted silicon-acrylic emulsion and 0.3 g of tridetrifluoroalkyltriethoxysilane under stirring condition, and continue stirring for 2 hours to obtain the super-hydrophobic coating. The superhydrophobic coating was prepared by spraying, and the obtained superhydrophobic coating was sprayed onto a glass sheet, and dried at 50° C. for 24 hours to obtain a superhydrophobic coating. The water contact angle of the coating is 155 degrees, and the rolling angle is 7.5 degrees.

[0025] figure 1 Static water contact angle measurements of the prepared superhydrophobic coatings.

[0026] figure 2 The 5 micron-SEM image of the surface of the prepared superhydrophobic ...

Embodiment 2

[0030] Dilute the water-based styrene-acrylic emulsion with a solid content of 40% to a solid content of 10% with ethanol. Add 3 g of nano-silica particles (particle diameter: 14 nm) into 30 mL of ethanol, and ultrasonicate for 15 min to obtain a uniform dispersion. 20 mL of ethanol-diluted styrene-acrylic emulsion and 0.6 g of trifluoroalkyltrimethoxysilane were added under stirring conditions, and the superhydrophobic coating was obtained after stirring for 2 hours. The superhydrophobic coating was prepared by spraying, and the obtained superhydrophobic coating was sprayed onto a glass sheet, and dried at 50° C. for 24 hours to obtain a superhydrophobic coating. The water contact angle of the coating is 154 degrees, and the rolling angle is 6 degrees.

[0031] The static water contact angle measurement figure, SEM figure and surface atomic force microscope figure of the superhydrophobic coating prepared in this embodiment are similar to those in Example 1.

Embodiment 3

[0033] The aqueous acrylate emulsion with a solid content of 44% was diluted with ethanol to a solid content of 10%. Add 3 g of nano-silica particles (50 nm in particle size) into 10 mL of ethanol, and sonicate for 15 min to obtain a uniform dispersion. Add 20 mL of ethanol-diluted acrylate emulsion and 0.3 g of heptadecafluoroalkyltrimethoxysilane under stirring condition, and continue stirring for 2 hours to obtain the super-hydrophobic coating. The superhydrophobic coating was prepared by spin coating, and the obtained superhydrophobic coating was sprayed onto a glass sheet, and dried at 50° C. for 24 hours to obtain a superhydrophobic coating. The water contact angle of the coating is 152 degrees, and the rolling angle is 9 degrees.

[0034] The static water contact angle measurement figure, SEM figure and surface atomic force microscope figure of the superhydrophobic coating prepared in this embodiment are similar to those in Example 1.

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Abstract

The invention provides a superhydrophobicity coating based on waterborne emulsion. The coating is composed of waterborne emulsion, inorganic nanoparticles, a silane coupling agent containing fluorine and ethyl alcohol. The coating is prepared from, by mass, 5-50% of the waterborne emulsion, 1-20% of the inorganic nanoparticles, 0.1-2% of the silane coupling agent containing fluorine, and the balance ethyl alcohol; the preparing method comprises the steps of spraying the coating on a glass, metal and paper base, and drying at a temperature of 50 DEG C, so that the superhydrophobicity coating is obtained; the contact angle of static water of the coating is bigger than 150 degrees, and the rolling angle is smaller than 10 degrees. The superhydrophobicity coating has the advantages that 1, the waterborne emulsion is adopted as a main raw material, the adopted dilution dispersing agent is the ethyl alcohol, the use of a VOC solvent is avoided, and the superhydrophobicity coating thus has environment friendliness; 2, the superhydrophobicity coating is prepared through simple synthesis of the waterborne emulsion, the inorganic nanoparticles and the silane coupling agent containing fluorine, the steps is simple, the preparing process is easy to control, and large-scale industrial production is promoted.

Description

technical field [0001] The invention relates to the field of preparation of coatings, in particular to an aqueous emulsion-based superhydrophobic coating and its preparation method and application. Background technique [0002] Due to serious environmental and resource issues, traditional paints that use a large amount of organic solvents have been gradually replaced by water-based paints. After decades of development and continuous improvement, water-based emulsions have excellent performance, and are widely used in wood furniture, automobile industry, construction industry, etc., and various commercial water-based emulsion coatings are emerging in endlessly. [0003] On the other hand, with the continuous development of the coatings industry and the continuous advancement of technology, the functionalization of coatings has gradually become an important direction for the development of the coatings industry. Due to the great application prospects in self-cleaning, anti-ic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/04C09D125/14C09D131/04C09D175/04C09D7/12C09D5/08C09D5/16
CPCC08K3/36C08K5/08C08K5/5419C08K2201/011C09D5/1687C09D7/63C09D7/67C09D125/14C09D131/04C09D133/04C09D143/04C09D175/04
Inventor 郭天瑛杨吉祥
Owner NANKAI UNIV
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