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Hydrophilic and oleophobic easy-to-clean organic coating and preparation method thereof

An organic coating, hydrophilic and oleophobic technology, applied in coatings, epoxy resin coatings, etc., can solve the problems of non-oil repellency, difficulty in large-scale production and application, water drop rolling, etc., to achieve easy replacement and excellent anti-pollution effect of ability

Active Publication Date: 2014-06-04
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although silicone has a strong repellency to water, it is not oil-proof and has a short service life. After 6-12 months, its water repellency will be greatly reduced
Organic fluorine can be both hydrophobic and oleophobic, but the contact angle of water is generally around 90°, which can neither make water droplets roll off nor replace the position of oil stains, and the easy-to-clean effect is not very good
[0006] In addition, the Chinese patent application with the publication number CN101870187A discloses an easy-to-clean organic coating and its preparation method. The method is to perform low-temperature plasma fluorination treatment on a hydrophilic substrate, which also achieves the easy-to-clean surface of the hydrophilic and oleophobic coating. cleaning effect, but this method uses a double-layer film to prepare an organic coating, the first layer is a hydrophilic coating, the second layer is an oleophobic coating, and a low-temperature plasma treatment technology is used in the preparation process, so the preparation process is complicated. Difficult to achieve large-scale production and application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] In this embodiment, the hydrophilic and oleophobic easy-to-clean organic coating is composed of an organic solution and a curing agent. The curing agent is N,N-dimethylbenzylamine, and the curing agent accounts for 9% of the mass of the organic solution.

[0039] The organic solution is a fluorine-containing polyurethane-modified epoxy resin solution formed by reacting fluorine-containing polyurethane and epoxy resin in an organic solvent. Among them, fluorine-containing polyurethane and epoxy resin are bonded by chemical bonds to form a semi-interpenetrating network structure; the mass ratio of epoxy resin to fluorine-containing polyurethane is 88:12, and the organic solvent accounts for the mass of the epoxy resin solution modified by fluorine-containing polyurethane. 30% of;

[0040] Fluorine-containing polyurethane is polymerized by hydrophilic diols, fluoroalcohols and diisocyanates under the catalysis of an appropriate amount of organometallic compound catalyst; ...

Embodiment 2

[0056] In this embodiment, the hydrophilic and oleophobic easy-to-clean organic coating is composed of an organic solution and a curing agent, the curing agent is triethanolamine, and the curing agent accounts for 7% of the mass of the organic solution.

[0057] The organic solution is a fluorine-containing polyurethane-modified epoxy resin solution formed by reacting fluorine-containing polyurethane and epoxy resin in an organic solvent. Among them, fluorine-containing polyurethane and epoxy resin are bonded by chemical bonds to form a semi-interpenetrating network structure; the mass ratio of epoxy resin to fluorine-containing polyurethane is 80:20, and the organic solvent accounts for the mass of the epoxy resin solution modified by fluorine-containing polyurethane. 33% of

[0058] Fluorine-containing polyurethane is polymerized by hydrophilic diols, fluoroalcohols and diisocyanates under the catalysis of an appropriate amount of organometallic compound catalyst; The molar...

Embodiment 3

[0074] In this embodiment, the hydrophilic and oleophobic easy-to-clean organic coating is composed of an organic solution and a curing agent, the curing agent is 2-dimethylimidazole, and the curing agent accounts for 5% of the mass of the organic solution.

[0075] The organic solution is a fluorine-containing polyurethane-modified epoxy resin solution formed by reacting fluorine-containing polyurethane and epoxy resin in an organic solvent. Among them, fluorine-containing polyurethane and epoxy resin are bonded by chemical bonds to form a semi-interpenetrating network structure; the mass ratio of epoxy resin to fluorine-containing polyurethane is 82:18, and the organic solvent accounts for the mass of the epoxy resin solution modified by fluorine-containing polyurethane. 36% of

[0076] Fluorine-containing polyurethane is polymerized by hydrophilic diols, fluoroalcohols and diisocyanates under the catalysis of an appropriate amount of organometallic compound catalyst; The m...

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Abstract

The invention discloses a hydrophilic and oleophobic easy-to-clean organic coating and a preparation method thereof. The organic coating is obtained by curing an organic solution by a curing agent, the organic solution is a fluorine-containing polyurethane modified epoxy resin solution formed by carrying out a reaction on fluorine-containing polyurethane and an epoxy resin in an organic solvent, and the fluorine-containing polyurethane and the epoxy resin form a semi-interpenetrating network structure formed through the bonding of chemical bonds. A micro area with uniformly distributed hydrophilicity and oleophobicity is constructed on the surface of an object to be coated through the semi-interpenetrating structure and low surface performances of fluorine, so the hydrophilic and oleophobic easy-to-clean organic coating is formed. Experiments prove that the lowest contact angle between the organic coating and water can reach 15DEG, and the highest contact angle between the organic coating and oil can reach 90DEG, so water can thoroughly displace oil stains on the surface of an original solid, and an easy-to-clean effect is reached.

Description

technical field [0001] The invention belongs to the technical field of surface coatings, in particular to a hydrophilic and oleophobic easy-to-clean organic coating and a preparation method thereof. Background technique [0002] Wettability is an important characteristic of solid surfaces. From a macroscopic point of view, wetting is a process in which a fluid replaces another fluid from a solid surface; from a microscopic point of view, a fluid that wets a solid, after displacing the fluid on the original solid surface, itself is in harmony with the solid surface. In the contact at the molecular level, there are molecules without replacement between them, such as water displacing air on the glass surface and expanding. If on a surface, water can replace the oil on the original solid surface, and there are no oil molecules between the water and the solid surface, the effect of easy cleaning can be achieved. [0003] At present, there are two main categories of easy-to-clea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G81/00C09D163/02
Inventor 应立萍彭叔森张昕赵文杰乌学东
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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