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A preparation method of nano-doped intelligent dimming film

An intelligent dimming and nano-technology, applied in coatings and other directions, can solve problems such as uneven dispersion, achieve good dispersion activity, improve electro-optic performance, and prevent agglomeration

Active Publication Date: 2018-06-26
浙江鼎昇新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to solve the above technical problems, the present invention provides a method for nano-doped smart dimming film, the doped nano-material can be stably dispersed in the prepolymer to form a nano-crystal sol, so that the nano-material can be uniformly dispersed in the In the intelligent dimming film matrix, overcome the defect of dispersion unevenness caused by the agglomeration of nanoparticles

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Embodiment 1

[0027] A preparation method for a nano-doped intelligent dimming film, comprising the following steps:

[0028] (1) At first, titanium dioxide nanoparticles are prepared by solvothermal synthesis, and a titanium dioxide nanoparticle crystal gel with strong dispersion activity is formed, as follows:

[0029] Dissolve tetrabutyl titanate in ethanol solvent, adjust the pH value, add a small amount of deionized water, stir for several hours, add tetrabutyl titanate mixed solution into deionized water dropwise, tetrabutyl titanate and deionized The molar mixing ratio of ionic water is 1:90, heat treatment in the reactor at 150°C for 8 hours, and agglomerated titanium dioxide nanoparticle crystal gel with strong dispersion activity is obtained after heat treatment;

[0030] (2) Add the nanoparticle crystal gel with strong dispersing activity and coupling agent KH-570 to the intelligent dimming film prepolymer NOA65, and use the stirring-assisted ultrasonic dispersion method for 3-5h...

Embodiment 2

[0035] A preparation method for a nano-doped intelligent dimming film, comprising the following steps:

[0036] (1) At first, the nanoparticles are prepared by the hydrothermal method, and a nano-anatase crystal gel with strong dispersion activity is formed, as follows:

[0037] Take tetrabutyl titanate and slowly drop it into deionized water to form a white precipitate. After cleaning and centrifuging the precipitate, take the precipitate and stir it in deionized water for 10-12 hours, and then heat-treat it in the reactor at 180°C for 8 hours. After heat treatment, nano anatase crystal gel with strong dispersion activity is obtained;

[0038] (2) Add nano-anatase crystal gel with strong dispersing activity and coupling agent KH-570 to NOA65 intelligent dimming film prepolymer, and mix it uniformly for 3-5 hours by stirring-assisted ultrasonic dispersion method to form a prepolymer Polymer nano sol, wherein the mass ratio of titanium dioxide nanoparticle crystal gel with str...

Embodiment 3

[0043] A preparation method for a nano-doped intelligent dimming film, comprising the following steps:

[0044] (1) At first, nanoparticles are prepared by solvothermal synthesis, and a nano-tin antimony oxide crystal gel with strong dispersion activity is formed, as follows:

[0045] Dissolve tin tetrachloride and antimony trichloride in ethanol solution, add deionized water, add ammonia water, form a light yellow precipitate, wash, centrifuge and precipitate until there are no impurity ions in the precipitate, take the precipitate and stir in deionized water to form a chemical solution After 10-12 hours, add oxalic acid and hydrogen peroxide, heat treatment in the reactor at 210°C for 10 hours, and obtain nano-antimony tin oxide crystal gel with strong dispersion activity;

[0046](2) Add nano-tin antimony oxide crystal gel with strong dispersing activity and coupling agent KH-560 to the intelligent dimming film prepolymer NOA65, and mix it uniformly for 3-5 hours by stirrin...

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Abstract

The invention discloses a method for preparing a nano-doped intelligent light-adjusting film. The method comprises the steps of preparing nano metal-oxide particle crystal gel by using a hydrothermal-method or solvothermal-method synthesis method, mixing the gel nanoparticles with relatively high dispersion activity with a prepolymer, adding a small amount of coupling agent into the mixture, mixing the nanoparticles and the prepolymer, dispersing the nanoparticles by using stirring and ultrasonic waves so as to form prepolymer nano sol, mixing the prepolymer nano sol with acrylate and nematic liquid crystals, adding a spacer into the mixture, coating the surface of a PET (Polyethyleneglycol Terephthalate) conductive film with the spacer added mixture by a roll coating process, and initiating photopolymerization under the condition of ultraviolet light, thereby preparing the intelligent light-adjusting film with excellent electro-optic characteristics. According to the method, parameters such as dielectric constant and refractive index of a polymeric matrix are changed through carrying out nano modification on the polymeric matrix, the electro-optic properties of the intelligent light-adjusting film are improved, the operating voltage is 30V, and the light transmittance of the intelligent light-adjusting film is about 70%; and meanwhile, the nano metal oxide particles synthesized by using the hydrothermal or solvent method are dispersed in the polymeric matrix, and the nanoparticles are good in dispersion activity and are not prone to agglomeration, so that the homogeneous dispersion of the nanoparticles in the polymeric matrix is guaranteed.

Description

field of invention [0001] The invention belongs to the technical field of functional film manufacturing, and in particular relates to a preparation method of a nano-doped intelligent dimming film. Background technique [0002] Smart dimming film is an electro-optic functional material that can control light. In the late 1980s, smart dimming film technology was invented by the University of Kent in Texas, USA, and authorized to commercialize by Baochuang Corporation of the United States. Subsequently, South Korea, Japan and other manufacturers began to intervene in this field in the mid-1990s. Chinese manufacturers entered the production field more than ten years after the advent of smart dimming films. However, due to the slow development of organic synthesis technology, the price of liquid crystals and polymers The price of polymer raw materials is high, the production of smart dimming film products is expensive, the market acceptance is low, and the development is slow. Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D4/02C09D4/06C09D7/61G02F1/1334
Inventor 高升魏礼杰王昕高尔明
Owner 浙江鼎昇新材料科技股份有限公司
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