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Preparation of coating layer with excellent mechanical properties and chemical stability

A coating and mechanical mixing technology, used in coatings, anti-corrosion coatings, fire-resistant coatings, etc., can solve problems such as strong corrosion, and achieve the effect of low cost, simple operation method and universality

Active Publication Date: 2020-04-17
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in its manufacturing process, dichloropentafluoropropane is used as a solution, which is highly corrosive
Therefore, it remains a great challenge to fabricate superamphiphobic materials with good properties through simple and cheap materials and methods

Method used

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  • Preparation of coating layer with excellent mechanical properties and chemical stability
  • Preparation of coating layer with excellent mechanical properties and chemical stability
  • Preparation of coating layer with excellent mechanical properties and chemical stability

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0052] method

[0053] Preparation of superamphiphobic coating

[0054] Weigh 0.4g of SiO 2 (15nm) and 0.6g of α-cellulose (25μm), and disperse it in a solution of mixing 30mL of absolute ethanol and 10mL of ammonia water, and stir the mixture and sonicate for 20 minutes. 2mL TEOS and 0.6 mLFAS Add dropwise to the above solution, and stir in a water bath at 50 °C for 6 h, then quickly inject 0.6 mL TEOS and 0.6 mL FAS into the suspension, and stir for 5 min. Then 2 mL of HFBA was added dropwise and stirred for another 2 h at 50 °C to obtain a final homogeneous suspension. 2 mL of the suspension was sprayed onto a horizontally placed substrate surface (3 cm x 8 cm) using a spray gun (ET4000, STAT, Germany) from a distance of 10 cm in vertical direction. Finally, after drying in a vacuum oven at 80 °C for 6 h, the superamphiphobic coating coated on the substrate was obtained.

[0055] Organic Droplet Impact Process

[0056] For the maximum break height measurement, droplets...

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Abstract

The present invention relates to preparation of a coating layer having excellent mechanical properties and chemical stability; a suspension consists of 1H,1H,2H,2H-perfluorodecyltrimethoxysilane (FAS)grafted silica (SiO2) and alpha-cellulose and hexafluorobutyl acrylate (HFBA) as a binder monomer (Fig. 1a). The super-amphiphobic coating layer is prepared by using a spray spraying method which islow in cost and can be prepared on a large scale. A multi-stage micro / nano structure can be formed and has quite low surface energy, and the surface energy is only 12.98 mN*m<-1>. The liquid with thesurface tension as low as 21 mN*m<-1> and various organic liquids with the viscosity as high as 297.8 mPa*s can be rebounded. Due to an in-situ formed adhesive, the coating layer can be applied to different substrates, shows excellent performance in high-pressure water impact (27.8 m*s<-1>), abrasion and adhesive tape stripping tests, and can also keep excellent performance in harsh environments such as high-corrosivity aqua regia, extremely low temperature / high temperature and ultraviolet irradiation.

Description

technical field [0001] The invention belongs to the field of preparation of super-amphiphobic coatings, and in particular relates to an industrialized super-amphiphobic coating which is multifunctional, mechanochemically stable, and sprayed with low-cost suspension to make organic droplets bounce. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] The superamphiphobic surface that repels water and oil droplets is a special anti-wetting state in the field of interface science, and has a wide range of applications in the fields of droplet manipulation, self-cleaning, heat transfer, anti-icing, liquid-liquid separation, etc. Since the first surface to repel oil droplets was fab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D151/08C09D101/02C09D7/62C09D5/08C08F283/12C08F220/24
CPCC08F283/12C08L2201/08C09D5/08C09D5/18C09D151/08C09D7/62C09D7/65C08L1/02C08K9/10C08K3/36C08F220/24
Inventor 刘利彬张海龙李学林郑良任金瓶
Owner QILU UNIV OF TECH