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Transparent water-impact-resistant super-lyophobic coating as well as preparation method and application of transparent water-impact-resistant super-lyophobic coating

A super-lyophobic and coating technology, applied in coatings, primers, etc., can solve the problems of haze influence, unexplained wear resistance and weather resistance, water impact resistance, and reduced mechanical stability, so as to achieve low cost and suitable The effect of large-scale production and simple preparation process

Pending Publication Date: 2021-07-20
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Numerous patent documents have reported the preparation of transparent super-hydrophobic surfaces by silica and other hydrophobic particles. Although the transparent super-hydrophobic surfaces prepared by some research work have reached a transmittance of more than 80%, the reported patent documents all use adhesives and hydrophobic Prepared by the method of particle blending, the haze is greatly affected, and the mechanical stability is reduced due to the presence of hydrophobic particles in contact with the substrate
For example, Chinese patent application CN108912867A discloses a method for preparing an environmentally friendly and highly transparent superhydrophobic coating. A single-layer hydrophobic coating is prepared by blending and spraying hydrophobic resins and hydrophobic micro-nano particles, which does not explain its wear resistance. There are few reports on superhydrophobic coatings with good water shock resistance and weather resistance. Among them, Chinese patent CN105885564B provides a method for preparing an all-organic multi-fluorinated epoxy superhydrophobic composite coating. The coating can withstand water shock , corrosion resistance, strong adhesion, wide application range, however opacity limits its further application
[0006]Aiming at the problems existing in the prior art and poor surface service performance, a simple, efficient, low-cost, and large-area preparation of a transparent water-resistant shock-resistant superhydrophobic surface was developed. The method is imperative, and coatings with wear resistance and weather resistance will better meet the needs of the public

Method used

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  • Transparent water-impact-resistant super-lyophobic coating as well as preparation method and application of transparent water-impact-resistant super-lyophobic coating
  • Transparent water-impact-resistant super-lyophobic coating as well as preparation method and application of transparent water-impact-resistant super-lyophobic coating
  • Transparent water-impact-resistant super-lyophobic coating as well as preparation method and application of transparent water-impact-resistant super-lyophobic coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] First, prepare the primer solution: dissolve 0.63g of ethylene acrylic acid copolymer (20wt% acrylic acid content) in tetrahydrofuran (30mL) and butyl acetate (60mL), stir until completely dissolved, and store for use;

[0070] Next, prepare the topcoat solution: disperse 1 g of hydrophobic fumed nano-silica in isopropanol (100 mL) by ultrasonication for 30 minutes (ultrasonic power 650 W) to obtain a bluish transparent dispersion, and the secondary particles of nano-silica before ultrasonication The diameter is more than 500nm, and most of them are micron-scale aggregates. After ultrasonication, the secondary particle size is reduced to less than 200nm, and it is stored for use;

[0071] Finally, the coating is prepared by spraying: the primer solution is sprayed on the surface of the glass substrate to form a thin film. The spraying pass is 30 times, and the spraying thickness is within 100nm. The spraying process is controlled to ensure that the film is transparent, a...

Embodiment 2

[0077] First, prepare the primer solution: dissolve 0.63g of acrylic resin in butyl acetate (90mL), stir until completely dissolved, and store for use;

[0078]Next, prepare the topcoat solution: disperse 1 g of hydrophobic fumed nano-silica in isopropanol (100 mL) by ultrasonication for 30 minutes (ultrasonic power 650 W) to obtain a bluish transparent dispersion, and the secondary particles of nano-silica before ultrasonication The diameter is more than 500nm, and most of them are micron-scale aggregates. After ultrasonication, the secondary particle size is reduced to less than 200nm, and it is stored for use;

[0079] Finally, the coating is prepared by spraying: the primer solution is sprayed on the surface of the glass substrate to form a thin film. The spraying pass is 15 times, and the spraying thickness is within 50nm. The spraying process is controlled to ensure that the film is transparent, and the first coating is obtained. Then spray the topcoat liquid on the surf...

Embodiment 3

[0083] First, prepare the primer solution: dissolve 0.63 g of butyl acetate cellulose in butyl acetate (90 mL), stir until completely dissolved, and store for use;

[0084] Next, prepare the topcoat solution: disperse 1 g of hydrophobic fumed nano-silica in isopropanol (100 mL) by ultrasonication for 30 minutes (ultrasonic power 650 W) to obtain a bluish transparent dispersion, and the secondary particles of nano-silica before ultrasonication The diameter is more than 500nm, and most of them are micron-scale aggregates. After ultrasonication, the secondary particle size is reduced to less than 200nm, and it is stored for use;

[0085] Finally, the coating is prepared by spraying: the primer solution is sprayed on the surface of the glass substrate to form a thin film. The spraying pass is 30 times, and the spraying thickness is within 100nm. The spraying process is controlled to ensure that the film is transparent, and the first coating is obtained. Then spray the topcoat liqu...

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Abstract

The invention discloses a transparent, water-impact-resistant and super-lyophobic coating as well as a preparation method and application thereof. The super-lyophobic coating comprises a first coating and a second coating located on the first coating, and the first coating and the second coating are both transparent coatings; the first coating comprises a thermoplastic polymer, and the thermoplastic polymer is selected from at least one of an ethylene acrylic acid copolymer, an ethylene acrylate copolymer, an ethylene vinyl acetate copolymer, a cycloolefin copolymer, acrylic resin, cellulose acetate and butyl acetate cellulose; the second coating comprises super-hydrophobic nanoparticles; and the super-hydrophobic nano-particles are combined with the thermoplastic polymer through physical and mechanical mutual embedding and chemical adhesion effects. The coating is good in transparency and low in haze, and has excellent water impact resistance and super-lyophobic performance.

Description

technical field [0001] The invention belongs to the field of coating preparation, in particular to a transparent, water-shock-resistant, super-lyophobic coating and its preparation method and application. Background technique [0002] Many biological surfaces in nature have special surface wetting behavior. The lotus leaf effect of "out of mud without staining" has attracted widespread attention in recent years due to its excellent antifouling and self-cleaning properties. This kind of superhydrophobic surface with a contact angle of water droplets greater than 150° and a rolling angle of less than 10° is widely used in daily life. Has great application value. However, as far as the currently prepared superhydrophobic surfaces are concerned, the practicability and multifunctionality limit their further development and application. Endow the superhydrophobic coating with high transparency, and meet the practicability of water impact resistance, acid resistance, and ultravio...

Claims

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Application Information

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IPC IPC(8): C09D123/08C09D133/04C09D101/14C09D5/00C09D7/61C09D7/62
CPCC09D123/0869C09D133/04C09D101/14C09D5/002C09D7/61C09D7/62C09D7/70C08K2201/011C08K7/26C08K9/06
Inventor 罗恒徐坚赵宁
Owner INST OF CHEM CHINESE ACAD OF SCI
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