A kind of superhydrophilic coating agent and preparation method thereof

A coating agent, super-hydrophilic technology, applied in coatings, anti-fouling/underwater coatings, polyamide coatings, etc., can solve the problem of self-cleaning, anti-fog effect and durability of super-hydrophilic coatings or poor preparation conditions Ideal, can not guarantee long-term performance, can not meet the needs and other problems, to achieve the effect of excellent anti-fog performance, enhanced hardness, and reduced diffuse reflection

Active Publication Date: 2019-09-17
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Titanium dioxide-based superhydrophilic coatings need to be able to achieve surface superhydrophilicity under the condition of ultraviolet light irradiation, and their long-term effectiveness cannot be guaranteed in indoor or dark environments, which limits their application range; most of them introduce two The super-hydrophilic coating of silicon oxide nanoparticles requires high-temperature treatment, such as electrostatic assembly and sintering to form a rough surface structure to achieve super-hydrophilic coating. It needs to be sintered at 550°C for 2 hours, and the preparation conditions are relatively harsh.
Generally speaking, the self-cleaning, anti-fog effect, durability or preparation conditions of the super-hydrophilic coatings of these technologies are not ideal yet.
[0004] Furthermore, the existing super-hydrophilic coating agents currently on the market have a single function and cannot meet the needs of the market.

Method used

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  • A kind of superhydrophilic coating agent and preparation method thereof
  • A kind of superhydrophilic coating agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Nanoparticle modification: a: Mix 8 parts of nano-silica, 80 parts of water, and 1 part of sodium lauryl sulfate, and perform ultrasonic treatment at 60°C (ultrasonic power 1500W, time 30min) to form a uniform dispersion liquid; b: Add polyethylene glycol monomethyl ether trimethoxysilane (nano-silica: polyethylene glycol monomethyl ether trimethoxysilane = 1:0.2) to the dispersion obtained in a, and add it dropwise After reacting with hydrochloric acid with a concentration of 1M for 4 hours, suction filtration, drying, grinding, and sieving were performed to obtain modified nanoparticles;

[0041] (2) Add 80 parts of ethanol, 15 parts of polyurethane resin, and 0.1 part of sodium lauryl sulfate to 3 parts of modified nanoparticles obtained in step (1), and heat (80° C.) with a magnetic stirrer (5000 rpm) Stir for 30 minutes to obtain a dispersion;

[0042] (3) Add 1 part of polyethylene glycol, 1 part of polyvinyl alcohol, and 1 part of carboxymethyl cellulose to ...

Embodiment 2

[0046] (1) Nanoparticle modification: a: Mix 10 parts of nano-silicon dioxide, 100 parts of water, and 1 part of sodium lauryl sulfate, and ultrasonically treat at 60°C until a uniform dispersion is formed; b: obtained in a Add a modifier to the dispersion liquid, nano-silica: modifier octylphenol polyoxyethylene ether = 1:0.2, and add hydrochloric acid with a concentration of 1.5mol / L drop by drop to react for 6 hours, then suction filter, dry and grind and sieving to obtain modified nano-silica particles;

[0047] (2) Add 40 parts of water, 20 parts of ethanol, 20 parts of polyurethane resin, 0.5 part of sodium dodecylbenzenesulfonate to 2 parts of modified nano-silica particles obtained in step (1), at 80° C., 5000 Turn / min and stir for 30 minutes to obtain a dispersion;

[0048] (3) Add 1 part of polyethylene glycol and 0.5 part of methyltriethoxysilane to the dispersion obtained in step (2), heat at 50° C., and stir at 3000 rpm for 40 minutes.

[0049] (4) Turn off the ...

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Abstract

The invention discloses a super-hydrophilic coating agent and a preparation method thereof, and belongs to the field of hydrophilic materials. The super-hydrophilic coating agent provided by the invention is prepared from the following components: resin, a hydrophilic surfactant, modified nanoparticles, a leveling agent, a dispersing agent, and a solvent. The super-hydrophilic coating agent provided by the invention can let the surface of the substrate be rough, and is more conducive to the spreading of water, and has better hydrophilicity and has the advantages of ultra-thin, high hardness, scouring resistance and fast film formation. The method for preparing the super-hydrophilic coating agent provided by the invention has low process conditions, simple operation and no need for ultraviolet curing.

Description

technical field [0001] The invention relates to a superhydrophilic coating agent and a preparation method thereof, belonging to the field of hydrophilic materials. Background technique [0002] The contact angle of superhydrophilic coating with water is close to 0°. When small water droplets come into contact with the coating, they will spread out quickly to form a uniform water film, which will not affect the optical performance of the product. At the same time, the water film can block and isolate dirt, and can realize easy cleaning of oil and dirt. Effect. [0003] At present, superhydrophilic coatings are mostly realized by introducing nanoparticles such as titanium dioxide or hydrophilic silicon dioxide and aluminum oxide. Titanium dioxide-based superhydrophilic coatings need to be able to achieve surface superhydrophilicity under the condition of ultraviolet light irradiation, and their long-term effectiveness cannot be guaranteed in indoor or dark environments, whic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D177/00C09D5/16C09D7/62
Inventor 张丹黄婵娟
Owner JIANGNAN UNIV
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