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Preparation method of composite superhydrophobic coating possessing abrasion-resistance performance

A technology of super-hydrophobic coating and anti-wear performance, which is applied in the field of preparation of composite super-hydrophobic coatings, and can solve problems such as super-hydrophobic surface failure, rough surface structure damage, and super-hydrophobic function failure.

Inactive Publication Date: 2015-02-04
山东天汇防水股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Super-hydrophobic coatings refer to coatings with a contact angle greater than 150° with water droplets. Super-hydrophobic coatings have the functions of self-cleaning, waterproof, and anti-ice and snow adhesion. They have application prospects in daily life and industrial fields. Super-hydrophobic coatings have a highly rough structure , when the superhydrophobic surface is subjected to friction, in fact, the micron or nanometer protrusions on the surface bear the pressure and shear action, and the pressure and shear stress carried by the surface micro-protrusions are far greater than the apparent pressure and shear stress, thus causing the surface The rough structure is damaged due to stress concentration, which eventually leads to the failure of the superhydrophobic function
Therefore, the superhydrophobic surface is prone to wear and failure during use

Method used

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  • Preparation method of composite superhydrophobic coating possessing abrasion-resistance performance
  • Preparation method of composite superhydrophobic coating possessing abrasion-resistance performance
  • Preparation method of composite superhydrophobic coating possessing abrasion-resistance performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The specific steps are: 1) Weigh 3.2 grams of hydroxyl-terminated polybutadiene and 1 gram of toluene diisocyanate and place them in a round-bottomed flask, react at 70° C. for 1 hour, then add 135.8 grams of acetone to dilute to form polyurethane with a solid content of 3%. Prepolymer solution; 2) Slowly add the above polyurethane prepolymer solution dropwise to 70 grams of ethylenediamine in acetone solution with a mass content of 0.25%, to obtain a milky white polyurethane sol, and keep stirring at 300 rpm during the dropping process Speed; 3) Add 4.2 grams of epoxy resin E-44, 0.588 grams of amino silicone oil and 0.22 grams of diethylenetriamine to the polyurethane sol, and mix evenly to obtain a spraying liquid; place the spraying liquid in the spray gun irrigation and use 0.6MPa compressed air Sprayed on the glass substrate, after 12 hours at 20 degrees Celsius, the obtained coating is a composite super-hydrophobic coating, and the contact angle of the coating is ...

Embodiment 2

[0021] The specific steps are: 1) Weigh 3.2 grams of hydroxyl-terminated polybutadiene and 1 gram of toluene diisocyanate and place them in a round-bottomed flask, react at 70° C. for 1 hour, then add 135.8 grams of acetone to dilute to form polyurethane with a solid content of 3%. Prepolymer solution; 2) Slowly add the above polyurethane prepolymer solution dropwise to 56 grams of ethylenediamine in acetone solution with a mass content of 0.2%, to obtain a milky white polyurethane sol, and keep stirring at 500 revolutions per minute during the dropping process Speed; 3) Add 5.88 grams of epoxy resin E-44, 0.63 grams of amino silicone oil and 0.5 grams of diethylenetriamine to the polyurethane sol, and mix evenly to obtain the spraying liquid; place the spraying liquid in the spray gun irrigation and use 0.6MPa compressed air After spraying on the glass substrate and leaving it at 20 degrees Celsius for 12 hours, the resulting coating is a composite super-hydrophobic coating, a...

Embodiment 3

[0024] 1) Weigh 4.5 grams of hydroxyl-terminated polybutadiene and 1 gram of toluene diisocyanate in a round-bottomed flask, react at 70°C for 1 hour, then add 104.5 grams of acetone to dilute into a polyurethane prepolymer solution with a solid content of 5%. ; 2) Slowly add the above-mentioned polyurethane prepolymer solution dropwise to 55 grams of ethylenediamine in acetone solution with a mass content of 0.25%, to obtain a milky white polyurethane sol, and keep a stirring speed of 400 revolutions per minute during the dropping process; 3) Add 3.3 grams of epoxy resin E-44, 0.74 grams of amino silicone oil and 0.56 grams of diethylenetriamine to the polyurethane sol, mix well to obtain a spraying liquid; put the spraying liquid in the spray gun tank, and use 0.6MPa compressed air to spray on the glass substrate , after standing at 20 degrees Celsius for 12 hours, the obtained coating is a composite superhydrophobic coating, and the contact angle of the coating is 165°.

[...

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Abstract

The invention relates to a preparation method of a composite superhydrophobic coating possessing abrasion-resistance performance, which comprises the following steps: 1)performing prepolymerization on hydroxyl terminated polybutadiene and toluene diisocyanate at 70 DEG C for 1 hour to synthesize to obtain a polyurethane performed polymer, mixing the polyurethane performed polymer and acetone and diluting to a polyurethane performed polymer solution; 2)under the condition of 300-500r / minute of the stirring speed, adding the polyurethane performed polymer solution drop by drop in an acetone solution of ethene diamine, performing chain extension to obtain polyurethane sol; and 3)adding epoxy resin E-44, amino silicon oil and diethylenetriamine to polyurethane sol to form a spraying liquid, spraying the spraying liquid on a matrix, and forming a microscopic ordered dimpling structure which is the composite superhydrophobic coating on the surface after solidification. The method has the advantages of simple process and easy construction, the obtained composite superhydrophobic coating has excellent abrasion resisting performance after abrasion resistance test according to American material and test association standard (ASTM) D-968-05.

Description

technical field [0001] The invention relates to a preparation method of a composite superhydrophobic coating, which belongs to the technical field of coatings. Background technique [0002] Super-hydrophobic coatings refer to coatings with a contact angle greater than 150° with water droplets. Super-hydrophobic coatings have the functions of self-cleaning, waterproof, and anti-ice and snow adhesion. They have application prospects in daily life and industrial fields. Super-hydrophobic coatings have a highly rough structure , when the superhydrophobic surface is subjected to friction, in fact, the micron or nanometer protrusions on the surface bear the pressure and shear action, and the pressure and shear stress carried by the surface micro-protrusions are far greater than the apparent pressure and shear stress, thus causing the surface The rough structure is damaged due to stress concentration, which eventually leads to the failure of the superhydrophobic function. Therefor...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D163/02C09D7/12C08G18/65C08G18/62C08G18/32
CPCC09D175/14C08G18/10C08G18/3228C08G18/6594C08G18/69C09D5/1681C08L63/00
Inventor 王峰粟常红朱国全谭洪生
Owner 山东天汇防水股份有限公司
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