Method for preparing anti-reflection coating film with nano porous structure on surface of flexible base material

A flexible substrate and nano-porous technology, applied in coatings and other directions, can solve the problems of low anti-reflection efficiency and inability to realize nano-porous structure, and achieve the effects of wide application range, integrity and enhanced binding force

Active Publication Date: 2018-09-11
浙江理工大学上虞工业技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its principle is to build a nano-rough surface on the surface of the fabric, which is limited to a single-layer particle coating film, and as the coating film thickens, the upper and lower layers of particles pile up on each other, making it impossible to achieve a nano-porous structure, so the efficiency of anti-reflection is significantly low. In the nanoporous membrane of the present invention, this will be confirmed in the comparative examples of the present application

Method used

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  • Method for preparing anti-reflection coating film with nano porous structure on surface of flexible base material
  • Method for preparing anti-reflection coating film with nano porous structure on surface of flexible base material
  • Method for preparing anti-reflection coating film with nano porous structure on surface of flexible base material

Examples

Experimental program
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Effect test

preparation example Construction

[0061] Preparation of cross-linked hard particles and soft particles

[0062] Preparation of cross-linked hard particles: Weigh 2 grams of EGDMA and 18 grams of MMA sequentially in a beaker using an analytical balance, and stir for 5 minutes with a magnetic stirrer to mix the mixed monomers evenly; weigh them sequentially in another beaker 1 gram of SDS and 74.94 grams of deionized water were stirred with a magnetic stirrer for 5 minutes; the above-mentioned raw materials were added to a 250mL four-necked flask with a stirring paddle, a condenser tube and a nitrogen protection device, and the stirring speed was kept at 200-300 rpm / minute, the four-necked flask was placed in a water bath at 75°C, and the temperature of the system was guaranteed to be about 75°C. Dissolve 0.06 grams of KPS in 5mL of deionized water, add it to the four-necked flask, and react for 3 hours; the resulting emulsion was PMMA emulsion with a particle size of 58nm, that is, an emulsion of hard particl...

Embodiment 1

[0069] 1) Take six 25mL beakers, numbered Ⅰ, Ⅱ, Ⅲ, Ⅳ, Ⅴ and Ⅵ respectively; add 1.2 grams, 1.5 grams, 1.9 grams, 2.3 grams, 2.7 grams and 3.1 grams of hard particles into each beaker , then add 0.5 grams of soft particle PBA emulsion and 0.025 grams of SDS to each beaker to prepare a coating emulsion with a solid content of 3% to 8%;

[0070] 2) Take six 25mL beakers and mark them with No. 1, No. 2, No. 3, No. 4, No. 5 and No. 6 respectively, and add 0.15 g of NH 4 HCO 3 , and then add 5.5 g of deionized water to each of the above beakers; make the NH in each beaker 4 HCO 3 dissolve;

[0071] 3) Put the NH in the No. 1 beaker 4 HCO 3 The solution was added to the No. 1 beaker to obtain the coating solution Ⅰ-1; the NH in the No. 2 beaker 4 HCO 3 Add the solution into No. Ⅱ beaker to obtain coating solution Ⅱ-2; 4 HCO 3 The process of solution requires slow dripping, and the emulsion is constantly stirred during the dripping process, and the prepared emulsion is placed...

Embodiment 2

[0088] 1) Using the spin coating process, apply the coating solution VI-6 in Example 1 on the PET substrate, spin coating to form a film, and then place it in a blast oven at 80°C for 1 hour and take it out to obtain nano Anti-reflection coating with porous structure.

[0089] 2) The coated PET film was bent 180° multiple times, and the transmittance after bending was tested to investigate the mechanical stability of the coated film.

[0090] The planar topography figure of coating film on PET substrate in embodiment 2 is as Figure 9 Shown; PMMA / PBA mixed emulsion in embodiment 2 prepares the transmittance curve figure of coating film under different bending times as Figure 10 shown.

[0091] The scanning electron microscope on the surface of the coating film shows that the coating film coated on the PET substrate has a porous structure; the test of the optical properties of the coated glass shows that before bending, the transmittance of the coated PET substrate increases...

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Abstract

The invention discloses a method for preparing an anti-reflection coating film with a nano porous structure on the surface of a flexible base material. The method comprises the following steps: 1) after mixing emulsion of hard particles and emulsion of soft particles, adding (NH4)2CO3 or NH4HCO3 to obtain a film coating solution; 2) coating the flexible base material with the film coating solutionby adopting a spin-coating method; after drying in an air-blowing drying oven, finishing preparation. The nano porous coating film can realize the foundation of a low refractive index level, the thickness of the coating film is regulated and controlled and the wavelength of maximum transmittance is changed, so that an applicable range is wider; when lambda max of the coating film is large wavelength, the transmittance loss of the coating film on small wavelength is only 0.45 percent; the soft particles form the film so that on one hand, the hard particles can be stuck together and the integrity of a coating film structure is improved; on the other hand, the binding force between the coating film and the base material also can be enhanced; when the base material is deformed, optical properties of the base material are stable.

Description

technical field [0001] The invention relates to the technical field of anti-reflection coatings, in particular to a method for preparing nano-porous structure anti-reflection coatings on the surface of a flexible substrate. Background technique [0002] Anti-reflection coatings can effectively reduce the reflectivity of substrates to incident light and improve light utilization efficiency, so they have broad application prospects in the fields of energy, optical imaging, and military invisibility. Because the anti-reflection coating film prepared now has obvious selectivity to light waves in the visible wavelength range, the wavelength corresponding to the maximum transmittance of the anti-reflection coating film (λ max ) in the large wavelength range of visible light (700-800nm), the transmittance loss of the coating film in the small wavelength range (400-450nm) is very serious. For example, the λ of the antireflection coating in the document "Hierarchical Nanoporous Sili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C09D133/12C09D133/08C09D7/61C08F220/14C08F222/14C08F120/18C08L67/02
CPCC08F120/18C08F220/14C08J2367/02C08L2205/02C09D133/12C09D7/61C08J7/0427C08L33/08C08F222/102
Inventor 杨雷赵强强沈一峰姜建堂
Owner 浙江理工大学上虞工业技术研究院有限公司
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