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A kind of superhydrophobic coating and its preparation method and application

A technology of superhydrophobic coating and polyvinyl alcohol, which is applied in the direction of coating, epoxy resin coating, etc., can solve the problems of difficult simultaneous optimization of superhydrophobicity and mechanical structure stability, increase of hydrophobicity, and high difficulty of preparation, and achieve good Super-hydrophobic properties, good water resistance, and simple preparation methods

Active Publication Date: 2022-02-18
湖南创瑾科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] A commonly used method for preparing superhydrophobic coatings is to form a rough coating surface by doping inorganic nanoparticles with doping concentration, so as to achieve superhydrophobic properties, but this method is difficult to simultaneously optimize superhydrophobicity and mechanical structure stability. Contradictory problem: increasing the doping concentration of inorganic nanoparticles will increase the hydrophobicity, but at the same time it will also reduce the mechanical stability of the coating, reduce the toughness of the coating and the adhesion between the substrates
However, other commonly used superhydrophobic coating preparation methods, such as etching, have problems such as complex process and high preparation difficulty.

Method used

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  • A kind of superhydrophobic coating and its preparation method and application
  • A kind of superhydrophobic coating and its preparation method and application
  • A kind of superhydrophobic coating and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A kind of superhydrophobic coating material, its preparation raw material is as shown in table 1 below:

[0050] Table 1. Raw materials for the preparation of hydrophobic coatings

[0051] components parts by mass epoxy resin 30 Polyvinyl alcohol nanospheres (0.4~0.8μm) 15 Hardener 10 Graphene 3 Defoamer 1 leveling agent 1.2 Dispersant 0.8 solvent 20

[0052] A preparation method of superhydrophobic coating, comprising the following steps:

[0053] S1. Mix the raw materials of the super-hydrophobic coating, stir for 30 minutes, spray evenly on the glass surface, and cure for 4 hours at 80° C.; S2. Put the cured coating in 60° C. water and soak for 6 hours to dissolve the surface polymer. Vinyl alcohol nanospheres to obtain a super-hydrophobic coating.

[0054] Preparation process of superhydrophobic coating

[0055] The principle of hydrophobic performance is: after the cured coating is treated with hot ...

Embodiment 2

[0057] A kind of superhydrophobic coating material, its preparation raw material is as shown in table 2 below:

[0058] Table 2. Raw materials for the preparation of hydrophobic coatings

[0059] components parts by mass epoxy resin 20 Polyvinyl alcohol nanospheres (0.4~0.8μm) 15 Hardener 10 Graphene 3 Defoamer 1 leveling agent 1.2 Dispersant 0.8 solvent 20

[0060] Compared with Example 1, the amount of epoxy resin in the present invention is 20 parts, and the ratio of epoxy resin to polyvinyl alcohol nano-microspheres is 4:3. The preparation method is the same as in Example 1.

Embodiment 3

[0062] A kind of superhydrophobic coating material, its preparation raw material is as shown in table 3 below:

[0063] Table 3. Raw materials for the preparation of hydrophobic coatings

[0064] components parts by mass epoxy resin 40 Polyvinyl alcohol nanospheres (0.4~0.8μm) 15 Hardener 10 Graphene 3 Defoamer 1 leveling agent 1.2 Dispersant 0.8 solvent 20

[0065] Compared with Example 1, the amount of epoxy resin in the present invention is 40 parts, and the ratio of epoxy resin to polyvinyl alcohol nano-microspheres is 8:3. The preparation method is the same as in Example 1.

[0066] Comparative example 1

[0067] A kind of hydrophobic coating material, its preparation raw material is as shown in table 4 below:

[0068] Table 4. Raw materials for the preparation of hydrophobic coatings

[0069]

[0070]

[0071] Compared with Example 1, the amount of epoxy resin in the present invention is 10 parts, ...

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Abstract

The invention discloses a super-hydrophobic coating and its preparation method and application. The raw materials of the super-hydrophobic coating include the following components in parts by weight: 20-40 parts of epoxy resin, 10 parts of polyvinyl alcohol nano-microspheres ~20 parts, 5~15 parts of curing agent, 4~10 parts of auxiliary agent and 10~25 parts of solvent. The preparation method of the super-hydrophobic coating comprises the following steps: S1, mixing the raw materials of the super-hydrophobic coating evenly, coating the base material, and standing for curing; S2, placing the cured coating at 40-100 Dissolve the surface polyvinyl alcohol nano-microspheres in water at ℃ to obtain a super-hydrophobic coating. The superhydrophobic coating can be applied to textiles, paper, glass, optical devices, electrical devices, energy materials, buildings or furniture, and has the advantages of simple and convenient preparation method and good hydrophobic performance.

Description

technical field [0001] The invention relates to the field of coating materials, in particular to a superhydrophobic coating and its preparation method and application. Background technique [0002] In recent years, superhydrophobic surfaces inspired by lotus leaves have been widely used in the fields of anti-corrosion, drag reduction, oil-water separation, anti-fog, and anti-icing. Superhydrophobicity refers to a special physical phenomenon in which the contact angle of water droplets on a solid surface exceeds 150°. For example, after the surface of the material is modified with a superhydrophobic coating, using the hydrophobicity of the superhydrophobic coating, the water droplets will take away the pollutants attached to it when they slide off the surface of the material, thereby realizing the self-cleaning of the material; the superhydrophobic coating The super-hydrophobic coating can prevent water-based pollutants from adhering to the surface of the material and achiev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/02C09D129/04C09D7/65C09D7/61C09D7/63
CPCC09D163/00C09D7/65C09D7/70C09D7/61C09D7/63C08L2205/035
Inventor 岳利俞国金周佩先
Owner 湖南创瑾科技有限公司