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Preparation method for nanometer composite anti-fogging film

A nano-composite and anti-fogging film technology is applied in the field of preparation of nano-composite anti-fogging films, which can solve problems such as the difficulty of adhesion between coatings and substrates, and achieve good practical application value, good surface smoothness, and good water resistance. Effect

Inactive Publication Date: 2014-09-17
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The problem in the above existing technologies is that this type of anti-fog technology has a very broad application prospect, but there will be certain difficulties in the adhesion between the coating and the substrate, and further exploration and improvement are needed

Method used

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  • Preparation method for nanometer composite anti-fogging film
  • Preparation method for nanometer composite anti-fogging film
  • Preparation method for nanometer composite anti-fogging film

Examples

Experimental program
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preparation example Construction

[0032] refer to figure 1 ,show figure 1 It is a flow chart of the steps of the embodiment of the preparation method of a nanocomposite anti-fog film of the present application, which may specifically include the following steps:

[0033] Step 101, dissolving inorganic nanoparticles in water, mixing them with acrylamide and / or acrylate monomers, adding catalysts and / or initiators, under the conditions of ultraviolet light triggering or standing at room temperature, the formation of inorganic In situ radical polymerization of nanoparticles as cross-linking agents to generate nanocomposite microgels.

[0034] In the present application, the inorganic nanoparticles may be any one or a mixture of clay, silicon dioxide, titanium dioxide, aluminum oxide, zinc oxide, magnesium oxide or zirconium oxide.

[0035] Preferably, when the inorganic nanoparticles are silicon dioxide or titanium dioxide, the particle diameter of the inorganic nanoparticles may be 2-40 nm.

[0036] Since thi...

Embodiment 1

[0061] Embodiment 1, join 0.8g clay in the 100ml vial that 50ml ultrapure water is housed, pass nitrogen gas under the condition of magnetic stirring for 15 minutes, add 0.505g N-methylolacrylamide, stir under nitrogen condition for 15 minutes, then put N 2 Move to the liquid surface and continue to pass N 2 After stirring at a slow speed for 15 minutes, 1 ml of 2% sodium thiosulfate and 20 μl of azobisisobutyronitrile were added, sealed and left to stand for 2 hours to obtain a clay nanocomposite microgel.

[0062] Put the glass substrate into a 90mm glass Petri dish, add 15ml of the prepared clay nanocomposite microgel, put it horizontally in an oven at 55°C for 24 hours, and use the self-deposition method to prepare an anti-fog film; at the same time, deposit the sol on On the lens of the swimming goggles, put the swimming goggles on the water vapor at 80°C to test the anti-fog effect. figure 2 It is the anti-fog effect diagram of the anti-fog film prepared in Example 1....

Embodiment 2

[0071] Example 2: Add 0.8g of clay into a 100ml vial containing 50ml of ultrapure water, pass nitrogen for 15 minutes under magnetic stirring, add 0.36g of acrylamide, stir for 15 minutes under nitrogen, and then add N 2 Move to the liquid surface and continue to pass N 2 After stirring slowly for 15 minutes, 1ml of potassium persulfate with a concentration of 2% and 20μl of N,N,NˊNˊ-tetramethylethylenediamine were added, sealed and left for 2 hours to obtain a clay nanocomposite microgel.

[0072] Put the glass substrate into a 90mm glass Petri dish, add 15ml of the prepared clay nanocomposite microgel, put it horizontally in an oven at 55°C for 24 hours, and use the auto-deposition method to prepare an anti-fog film.

[0073] The performance parameters of the anti-fog film prepared in Example 2 are as follows:

[0074] Anti-fog: 8 minutes

[0075] Hardness: 2H

[0076] Adhesion: >98%

[0077] Light transmittance: qualified

[0078] Contact angle: 41°

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Abstract

The invention provides a preparation method for a nanometer composite anti-fogging film. The method comprises the following steps: dissolving inorganic nanoparticles in water, mixing the dissolved inorganic nanoparticles with acrylamide and / or acrylic acid ester monomers, adding a catalyst and / or initiator and carrying out in situ free radical polymerization with the inorganic nanoparticles as a cross-linking agent under the condition of ultraviolet light initiation or standing at room temperature so as to produce nanometer composite microgel; and subjecting the nanometer composite microgel to film forming by using a spraying method, a gel stretch method, a Czochralski method, a spin-coating method, a sol deposition method or a blade coating method and curing an obtained film in a baking oven so as to obtain the nanometer composite anti-fogging film. The method for preparing the nanometer composite anti-fogging film in the invention can improve bonding force between a coating of the anti-fogging film and a substrate and anti-fogging duration time and wear resistance of the anti-fogging film.

Description

technical field [0001] The invention relates to the field of nanocomposite materials, in particular to a preparation method of a nanocomposite anti-fog film. Background technique [0002] Transparent materials (such as glass and plastic) are indispensable materials for people's daily life, work and production. However, when there is a certain temperature difference between the two sides separated from each other, water vapor will gather on the surface of the object, forming tiny dewdrops to diffuse the light, thereby significantly reducing the light transmittance of the glass. For example, in the cold winter, the fogging on the surface of the windshield of the car will greatly affect the visibility and increase the probability of traffic accidents; "Looking at flowers in the fog". The fogging problem brings a lot of inconvenience to people's work and life, so the development of anti-fogging application products on the glass surface will bring huge social and economic benef...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F120/58C08F120/56C08F220/56C08F220/58C08F220/54C08F2/48C08K9/00C08K3/34C08K3/36C08K3/22C09D133/24C09D133/26
Inventor 李欢军王伦
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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