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Preparation method of anti-fog coating

An anti-fog coating and coating technology, applied in coatings, climate change adaptation, etc., can solve the problems of complex experimental process and conditions, inconvenient practicability, and small application range, and achieve simple, fast and mild process of preparation The effect of environmental protection and easy availability of raw materials

Active Publication Date: 2020-07-14
CHANGCHUN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Chinese patent CN201810286368.7 reports a coated anti-fog spectacle lens and its preparation method. This type of anti-fog coating is suitable for ordinary resin lenses. The application range is small, and the experimental process and conditions are complicated
[0004] Chinese patent CN201710668657.9 reports a super-hydrophilic self-cleaning anti-fog coating and its preparation method. This type of anti-fog coating is coated on the surface of the substrate by dipping or spraying, and this method is used to maintain anti-fog effect, it is necessary to spray the anti-fog agent repeatedly on a regular basis, which is inconvenient and not very practical

Method used

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  • Preparation method of anti-fog coating

Examples

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Effect test

Embodiment 1

[0020] Embodiment 1: a kind of preparation method of anti-fog coating, the conditions and steps of preparation are as follows:

[0021] (1) Treatment of hydrophobic material substrates

[0022] The selected hydrophobic material substrate is a low-density polyethylene (LLDPE) film. At room temperature, wipe the surface of the LLDPE film with deionized water and absolute ethanol to remove various impurities on the surface of the substrate, and dry it at room temperature. The volume concentration of the described absolute ethanol is 99.8%, and the deionized water is made by the laboratory.

[0023] (2) Plasma cleaning treatment of the substrate surface of hydrophobic materials

[0024] Put the cleaned LLDPE film surface substrate in step (1) into a plasma cleaning machine for plasma cleaning treatment, and introduce hydroxyl groups on the LLDPE film surface substrate after treatment for the preparation of an anti-fog coating. The instrument model used for the plasma cleaning tr...

Embodiment 2

[0031] Embodiment 2: a kind of preparation method of anti-fog coating, the conditions and steps of preparation are as follows:

[0032] The treatment of the hydrophobic material substrate, the plasma cleaning treatment of the surface of the hydrophobic material substrate and the preparation process of the building blocks are the same as in Example 1.

[0033] In the preparation process of the multilayer film coating, the treated LLDPE film surface substrate is immersed in a 70° C. saturated boric acid solution for 20 minutes; the described immersion is in a 5 wt % PVA solution for 50 minutes. Repeat the operation for 3 cycles to obtain 3 cycles of layered assembled membrane coatings.

Embodiment 3

[0034] Embodiment 3: a kind of preparation method of anti-fog coating, the conditions and steps of preparation are as follows:

[0035] The treatment of the hydrophobic material substrate, the plasma cleaning treatment of the surface of the hydrophobic material substrate and the preparation process of the building blocks are the same as in Example 1.

[0036] In the preparation process of the multilayer film coating, the treated LLDPE film surface substrate is immersed in a 70° C. saturated boric acid solution for 30 minutes; the described immersion is in a 5 wt % PVA solution for 60 minutes. Repeat the operation for 3 cycles to obtain 3 cycles of layered assembled membrane coatings.

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Abstract

The invention provides a preparation method of an anti-fog coating on various optically transparent hydrophobic materials by using a layer-by-layer assembly technology. The preparation method comprises the following steps: treatment of a hydrophobic material substrate, plasma cleaning treatment of the surface of the hydrophobic material substrate, selection of construction elements and preparationof a multilayer film coating. By utilizing the steps, the hydrophilic coating with the anti-fog function can be prepared on the surfaces of hydrophobic substrates such as optical glass, commerciallyavailable spectacle lenses and agricultural polyolefin shed films.The anti-fog coatings with different thicknesses can be obtained by adjusting the number of deposition periods according to differentapplication requirements. The prepared anti-fog coating is not limited by the shape and the size of a hydrophobic material, and the anti-fog coating can be attached to irregular surfaces. The preparation process of the coating is simple and rapid. The minimum contact angle of the anti-fog coating prepared by the method can reach 38.5 degrees. The method has the advantages of accessible raw materials, low cost and environment-friendly technique, and is simple to operate.

Description

Technical field: [0001] The invention belongs to the technical field of preparation of functional materials, and relates to a method for preparing an anti-fog coating. Background technique: [0002] Optically transparent materials are indispensable in people's daily life, but when there is a certain temperature difference between the two sides of the transparent material, it is easy to fog and cause serious light scattering, which reduces the optical transmittance. This fogging phenomenon brings a lot of troubles to people. , and even cause significant economic losses. For example, when fogging occurs on the windshield, glasses, and rearview mirrors, accidental dangers may occur. Due to the large temperature difference between morning and evening, agricultural shed film produces atomization, which not only affects the growth of crops, but also causes crops to rot and wither in severe cases. Fogging can also affect the use of electronic equipment or food packaging. Therefo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/12C08J7/054C08J7/056C08L23/08
CPCC08J7/123C08J7/042C08J2323/08C08J2429/04Y02A40/25
Inventor 张健夫丰晓飞赵文涛蒋丽萍
Owner CHANGCHUN UNIV OF SCI & TECH
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