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Wear-resistant and stable flame-retardant super-hydrophobic/super-oleophobic coating as well as preparation and application thereof

A super-hydrophobic and super-oleophobic technology, used in coatings, anti-corrosion coatings, fire-resistant coatings, etc., can solve the problems of no flame retardant effect, poor adhesion between the coating and the substrate, etc., to reduce fire hazards and reduce heat. The effect of the amount of smoke released and the wear resistance of high-speed friction machines

Active Publication Date: 2022-03-29
QILU UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Constructed a multi-level micro-nano hierarchical structure with good chemical stability, it can completely repel N,N-dimethylformamide droplets (34.4mN / m), and it can completely repel n-hexadecane (27.1mN / m m) The contact angle is 120°, but the resulting coating has poor adhesion to the substrate, and the coating has no flame retardant effect

Method used

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  • Wear-resistant and stable flame-retardant super-hydrophobic/super-oleophobic coating as well as preparation and application thereof
  • Wear-resistant and stable flame-retardant super-hydrophobic/super-oleophobic coating as well as preparation and application thereof
  • Wear-resistant and stable flame-retardant super-hydrophobic/super-oleophobic coating as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0106] Preparation of superhydrophobic / superoleophobic suspensions

[0107] First, the 15nm SiO 2 (0.5g), 50nm SiO 2 (0.5 g) and 25 μm α-cellulose were dispersed in a mixed solution containing absolute ethanol (30 mL) and ammonia water (10 mL), and sonicated for 30 minutes. Then TEOS (2 mL) and FAS (1 mL) were added dropwise to the above solution and stirred in a water bath at 60 °C for 6 hours, named solution A.

[0108] Secondly, bisphenol A type epoxy resin (EP, 1.0g) was dissolved in absolute ethanol (5mL) solution and ultrasonically oscillated for 30 minutes to name it solution B. Next, solution B was added to a 60°C water bath In the solution A of the solution A, after fully mixing, quickly inject 0.6mL TEOS and 0.6mL FAS into the suspension, and stir at 60°C for 2h, called solution C.

[0109] Preparation of superhydrophobic / superoleophobic suspensions

[0110] Dissolve 0.535 mL of heptafluorobutyric acid (HFA) and 0.57 mL of 3-(2-aminoethylamino)propyltrimethoxysil...

Embodiment 2

[0160] Preparation of bilayer superhydrophobic suspension (top layer)

[0161] 15nm SiO 2 (0.45g), 50nm SiO 2 (0.45 g) and 25 μm α-cellulose (0.45 g) were dispersed in a mixed solution containing absolute ethanol (30 mL) and ammonia water (10 mL) by stirring, and ultrasonicated in a 60° C. water bath for 30 minutes. Then TEOS (3 mL) and FAS (0.9 mL) were added dropwise to the above solution and stirring was continued for 4 hours, referred to as solution A. Dissolve bisphenol A type epoxy resin EP (5.0g) in anhydrous ethanol (25mL) solution by ultrasonic vibration for 1 hour, called solution B, then add solution B to solution A in a water bath at 60°C for 1 hour, fully After dissolving, 0.6 mL TEOS and 0.6 mL FAS were added dropwise into the above mixed solution and stirred for 1 hour, which was called solution C. At the same time, in another flask, add 2.8mL AS to 10mL absolute ethanol at 60°C, then add 0.3mL FAS dropwise, and react for 1h as a curing agent. Finally, the c...

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Abstract

The invention belongs to the field of new materials, and provides a wear-resistant and stable flame-retardant super-hydrophobic / super-oleophobic coating as well as preparation and application thereof, and the wear-resistant and stable flame-retardant super-hydrophobic / super-oleophobic coating is prepared by the following steps: taking a super-hydrophobic / super-oleophobic suspension as a top layer spraying solution; dispersing epoxy resin in a solvent, adding a fluorinated curing agent and a flame retardant, and reacting to obtain a bottom layer spraying solution; spraying the bottom layer spraying solution on the surface of a base material, then spraying the top layer spraying solution, and drying to obtain a double-layer wear-resistant super-hydrophobic flame-retardant coating; wherein the super-hydrophobic / super-oleophobic suspension liquid contains multi-stage micro-nano structure particles, a fluorinated curing agent and fluorinated epoxy resin. The prepared single-layer coating and double-layer structure (BLC) has hydrophobicity and flame retardance, and is good in mechanical property and excellent in corrosion resistance.

Description

technical field [0001] The invention belongs to the field of new materials and relates to the research of surface functional materials, in particular to the preparation and application of a wear-resistant and stable flame-retardant superhydrophobic / superoleophobic coating. Background technique [0002] With the advancement of industrialization, the requirements for wettability materials in practical industrial applications are getting higher and higher. People are no longer satisfied with coatings that only have good mechanical and chemical stability, and have begun to pursue and prepare multifunctional materials that can be applied to many different fields at the same time. For example, in recent years, flame retardant materials with superhydrophobic properties have been widely developed, but their single liquid repellency greatly limits their application range. Therefore, the preparation of a multifunctional, superhydrophobic / superoleophobic flame retardant coating with g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/18C09D5/08C09D163/02C09D7/63
CPCC09D5/18C09D5/08C09D163/00C09D7/63C08L2201/02C08L1/02C08K3/36C08K5/5313C08K5/544
Inventor 刘利彬班青姜海辉吉兴香陶芙蓉盖利刚张海龙卜鑫瑜
Owner QILU UNIV OF TECH
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