Super-hydrophobic nano coating and preparation method thereof

A nano-coating, super-hydrophobic technology, applied in coatings and other directions, can solve problems such as complexity, poor practicability, and poor adhesion

Inactive Publication Date: 2013-10-23
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because this method is more complicated in the process of preparing superhydrophobic coatings, and the bonding method between the coating and the substrate is physical bonding, and the adhesion is not strong, so the practicability is not strong.

Method used

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  • Super-hydrophobic nano coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 3 parts of titanium dioxide, 2 parts of silicon dioxide, 0.1 part of BYK180 and 0.2 parts of solvent-based polyurethane dispersant to 100 parts of absolute ethanol, stir thoroughly for 2 hours, and then ultrasonically disperse for 20 minutes to obtain a dispersion of titanium dioxide and silicon dioxide ;

[0027] Mix the above dispersion with 50 parts of silicone, add 0.8 parts of curing agent at the same time, stir and ultrasonically disperse into a uniform coating;

[0028] Spin coating is applied on the pre-cleaned glass sheet, and the number of spin coating is 2 times; then the glass sheet is dried in an oven at 70°C.

[0029] The contact angle of the prepared glass surface with water was 155°, and the rolling angle was 6°.

Embodiment 2

[0031] Add 6 parts of titanium dioxide, 8 parts of silicon dioxide, 0.2 parts of BYK180 and 0.56 parts of solvent-based polyurethane dispersant to 150 parts of absolute ethanol, add 5 mm zirconium beads, and disperse at high speed in a sand mill disperser for 2 hours to obtain titanium dioxide and Silica dispersion;

[0032] Mix the above dispersion with 50 parts of silicone, add 0.8 parts of curing agent at the same time, and continue to disperse into a uniform coating;

[0033] It is coated on the pre-cleaned glass sheet by dip coating, and then dried in an oven at 70°C.

[0034] The contact angle of the prepared glass surface with water was 153.5°, and the rolling angle was 7°.

Embodiment 3

[0036] Add 3 parts of titanium dioxide, 2 parts of silicon dioxide, 5 parts of barium sulfate, 0.1 part of BYK180 and 0.4 parts of solvent-based polyurethane dispersant into 100 parts of absolute ethanol, stir thoroughly for 2 hours, and then ultrasonically disperse for 20 minutes to obtain filler particles. Dispersions;

[0037] Mix the above dispersion with 50 parts of silicone, add 0.8 parts of curing agent at the same time, stir and ultrasonically disperse into a uniform coating;

[0038] Spin coating is applied on the pre-cleaned glass sheet, and the number of spin coating is 2 times; then the glass sheet is dried in an oven at 70°C.

[0039] The contact angle of the prepared glass surface with water was 149°, and the rolling angle was 9°.

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Abstract

The invention provides a super-hydrophobic nano coating. The super-hydrophobic nano coating is characterized by consisting of the following components in percentage by weight: 0.5-1.5% of nano dioxide, 0.5-1.5% of nano silicon dioxide, 0-20% of barium sulfate, 0-20% of talcum powder, 40-70% of a thinner and 20-50% of organic silicon resin. The preparation method comprises steps of preparing a dispersion solution from filler particles, the thinner and a dispersing agent in a certain proportion, mixing with the organic silicon resin, adding a curing agent, uniformly stirring, coating on a substrate in a spin-coating or dip-coating way, and drying at 50-80 DEG C. The prepared coating has a contact angle of 145-160 degrees with water drops on the surface of the substrate, and a rolling angle is lower than 10 degrees. The method is wide in raw material resource, simple in process, convenient to use, low in cost, suitable for industrial production, and applicable to surface self-cleaning, icing resistance, water and fog resistance, fluid drag reducing and other situations.

Description

technical field [0001] The invention belongs to the technical field of paint preparation, and in particular relates to a superhydrophobic nanometer paint and a preparation method thereof. Background technique [0002] Wetting ability is a very important characteristic of solid surface, usually the roughness and surface energy of solid surface determine its wetting ability. Superhydrophobicity is a major manifestation of wettability, which means that the static contact angle between a water droplet and its surface is greater than 150°, while the rolling angle is less than 10°. [0003] Superhydrophobic materials have become a hot spot of scientific research in recent years because of their practical application value in the fields of waterproofing, self-cleaning, hull drag reduction, lossless transfer of micro-droplets, and microfluidic systems. The superhydrophobic surface is similar to the "lotus leaf effect". There are nanostructures on the papillae of the microstructure ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D7/12
Inventor 曾琦琪赵斌林琳陈超何丹农
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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