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A kind of preparation method of anti-fog coating

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

Active Publication Date: 2022-05-31
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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  • A kind of preparation method of anti-fog coating

Examples

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Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: A method for preparing an anti-fog coating, the conditions and steps for preparation are as follows:

[0021] (1) Treatment of hydrophobic material substrate

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

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

[0024] The treated solid LLDPE membrane surface substrate in step (1) is placed into a plasma cleaner for plasma cleaning treatment, and hydroxyl groups are introduced on the LLDPE membrane surface substrate after treatment for the preparation of the anti-fog coating. The instrument model used in the plasma cleaning treatment is YZD08-5C, the oxygen...

Embodiment 2

[0031] Example 2: A method for preparing an anti-fog coating, the conditions and steps of preparation are as follows:

[0032] The preparation process of hydrophobic material substrate and plasma cleaning treatment of hydrophobic material substrate surface and construction matrix is the same as example 1.

[0033] Immersion of the treated LLDPE membrane surface substrate in a saturated boric acid solution at 70 °C for 20 min during the preparation of the multilayer film coating; the immersion in 5wt% PVA solution for 50 min. Repeat the operation for 3 cycles to obtain a layered assembly membrane coating of 3 cycles.

Embodiment 3

[0034] Example 3: A method for preparing an anti-fog coating, the conditions and steps for preparation are as follows:

[0035]The preparation process of hydrophobic material substrate and plasma cleaning treatment of hydrophobic material substrate surface and construction matrix is the same as example 1.

[0036] Immersion of the treated LLDPE membrane surface substrate in a saturated boric acid solution at 70 °C for 30 min during the preparation of the multilayer film coating; the immersion in 5wt% PVA solution for 60 min. Repeat the operation for 3 cycles to obtain a layered assembly membrane coating of 3 cycles.

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Abstract

The invention provides a method for preparing an anti-fog coating on various optically transparent hydrophobic materials using layer-by-layer assembly technology, including the treatment of the substrate of the hydrophobic material, the plasma cleaning treatment of the surface of the substrate of the hydrophobic material, and the construction of primitives selection, preparation of multilayer film coatings. The above steps can be used to prepare a hydrophilic coating with anti-fog function on the surface of hydrophobic substrates such as optical glass, commercial spectacle lenses, and agricultural polyolefin film. And according to different application requirements, anti-fog coatings with different thicknesses can be obtained by adjusting the number of deposition cycles. The prepared anti-fog coating is not limited by the shape and size of the hydrophobic material, and the anti-fog coating can be adhered to irregular surfaces. The preparation process of the coating is simple and fast. The minimum contact angle of the anti-fog coating prepared by the invention can reach 38.5°. The raw material of the invention is easy to obtain, the operation is simple, the cost is low, and the process is environmentally friendly.

Description

Technical fields: [0001] The present invention belongs to the field of functional material preparation technology, a method for preparing an anti-fog coating. Background: [0002] Optical transparent materials are indispensable in people's daily lives, but when there is a certain temperature difference between the two sides of transparent materials, it is very easy to fog, resulting in serious light scattering, which reduces the optical transmittance, and this atomization phenomenon brings a lot of trouble to people, and even causes major economic losses. For example, when fogging occurs on windshields, glasses, and rearview mirrors, unexpected dangers may occur. Agricultural shed film due to the large temperature difference between morning and evening and the phenomenon of atomization, not only affect the growth of crops, but also cause crop rot and wilting when serious. Atomization can also affect the use of electronic devices or food packaging. Therefore, it is of great signif...

Claims

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Application Information

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Patent Type & Authority Patents(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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