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Method for preparing anti-reflection and anti-fog coating based on layer-by-layer assembly technology

A layered assembly and anti-fog coating technology, applied in coatings, instruments, optics, etc., can solve the problems of limiting the preparation of anti-reflective anti-fog coatings, time-consuming, etc., and achieve the effect of green environmental protection and simple preparation process

Inactive Publication Date: 2012-05-02
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is usually time-consuming to prepare thicker membrane materials using layered assembly technology.
In addition, some post-processing methods, such as calcination, are usually used to induce pores in the film, which often limits the preparation of anti-reflective anti-fog coatings on transparent substrates such as plastics.

Method used

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  • Method for preparing anti-reflection and anti-fog coating based on layer-by-layer assembly technology
  • Method for preparing anti-reflection and anti-fog coating based on layer-by-layer assembly technology
  • Method for preparing anti-reflection and anti-fog coating based on layer-by-layer assembly technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1: Preparation of anti-reflection and anti-fog coating on substrate

[0043] a. Substrate treatment: The treatment method of the selected solid substrate glass or quartz substrate is as follows: use toluene, acetone, chloroform, ethanol and distilled water to ultrasonically treat for 10 minutes respectively to remove various impurities attached to the surface of the substrate, and then in 98% H 2 SO 4 and 30%H 2 o 2 (v:v=7:3) in the mixed solution and heated to boil (30min) until no bubbles overflowed. After cooling, rinse with a large amount of distilled water, then blow dry with nitrogen, and set aside. The surface of the glass or quartz substrate treated in this way contains a large amount of silanol; soak the treated glass or quartz substrate in 1mg / mL polydimethylallyl ammonium chloride (PDDA) for 30min to make its surface modified by self-assembly A layer of positively charged quaternized amino groups, such modified substrates can be used for the prepa...

Embodiment 2

[0055] Example 2: Preparation of anti-fog and anti-reflection coatings using polyallylamine hydrochloride PAH

[0056] The treatment of the substrate and the preparation process of the multilayer film coating are the same as in Example 1.

[0057] In the preparation of multilayer film, we use polypropylene amine hydrochloride PAH to replace PDDA and the mesoporous silica nanoparticle described in example 1 to alternately deposit and carry out the preparation of multilayer film coating, the obtained coating material The anti-reflection and anti-fog effects are similar to the results in Example 1 (such as Image 6 shown).

Embodiment 3

[0058] Example 3: Mesoporous silica nanoparticles with different particle sizes are used to prepare anti-fog and anti-reflection coatings

[0059] The treatment of the substrate and the preparation process of the multilayer film coating are the same as in Example 1.

[0060] In the preparation of multilayer films, we can also use mesoporous silica nanoparticles with different particle sizes and PDDA or PAH to alternately deposit to prepare multilayer films. Such as Figure 7 Shown is the preparation of anti-reflection and anti-fog coatings by alternating deposition of mesoporous silica nanoparticles with a concentration of 0.2wt% and a particle size of ~30 nm and 1 mg / mL polydimethylallyl ammonium chloride (PDDA) The UV-Vis transmission spectrum of the layer. As shown in the figure, when the number of deposited layers of the coating is greater than four cycles, the maximum transmittance of the coating is ~99.5%, and the maximum transmission wavelength of the coating can be a...

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Abstract

The invention relates to a method for preparing a coating with anti-reflection and anti-fog functions on the surface of an optical substrate based on the layer-by-layer assembly technology, belonging to the technical field of film coatings. The method comprises the following steps: firstly, introducing amino, carboxyl or hydroxyl on the surface of the substrate; then, alternately putting the substrate into a solution of polycation building basic elements and a solution of mesoporous silica nanoparticles for respectively soaking for 2-10min, and removing the physically adsorbed building basic elements after being soaked each time on the surface of the substrate by a soaking or washing method, thereby completing the preparation of a layer-by-layer assembly film of one cycle; and repeating the steps to prepare a layer-by-layer assembly film coating with controllable thickness on the substrate by using the layer-by-layer assembly technology. The method is suitable for substrates of plane surfaces, curved surfaces and irregular surfaces, such as eyeglass lenses of polycarbonate, swimming glasses and the like. The method not only can possibly enable the anti-reflection and anti-fog coating to be widely used in daily life but also can possibly enable the anti-reflection and anti-fog coating to be more widely used in other fields.

Description

technical field [0001] The invention belongs to the technical field of anti-reflection and anti-fog coatings, and specifically relates to a method for preparing coatings with dual functions of anti-reflection and anti-fog on the surface of various optical substrates based on layered assembly technology. This anti-reflection and anti-fog coating not only It can reduce the loss caused by the reflection of light on the surface of the substrate, and at the same time can effectively inhibit the phenomenon of water droplets fogging on the surface of the coating. Background technique [0002] Anti-reflective coatings are very important in practical applications. It can effectively reduce the loss of light energy caused by the reflection of light on the surface of the substrate, thereby increasing the transmission of light. At present, anti-reflective coatings have been widely applied to the surfaces of various optical devices and displays. The refractive index and thickness of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B1/10G02B1/11C08J7/12G02B1/111G02B1/18
Inventor 孙俊奇张凌霍启升乔振安
Owner JILIN UNIV