Polymer dispersed liquid crystal film based on polymer transparent conductive substrate and manufacturing method thereof

A technology of polymer transparent and conductive substrates, applied in optics, instruments, nonlinear optics, etc., can solve the problems of pushing up the market price of polymer dispersed liquid crystal films, high investment and operating costs, and restricting application fields. Improve off-state shielding, increase the upper limit operating temperature, and broaden the effect of application fields and scenarios

Inactive Publication Date: 2019-10-15
YANTAI RUSHUI OPTOELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the transparent and flexible conductive substrates used in the production of polymer dispersed liquid crystal films on the market are mainly indium tin oxide (ITO) films based on polyethylene terephthalate (PET), referred to as PET-ITO films. The advantages are good stability, high light transmittance, low square resistance, mature production process, etc., but the disadvantage is that the ITO conductive material needs to be evenly distributed on the PET surface with the help of vacuum magnetron sputtering technology, and the equipment investment and operation costs are high. The scarcity of indium itself has caused the price of PET-ITO film to remain high in the market, which in turn has pushed up the market price of polymer-dispersed liquid crystal film and greatly limited its application fields. In view of this, a new type of film has been developed. There is a need for transparent and flexible conductive substrates that can be used for PDLC films to replace the existing PET-ITO substrates

Method used

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  • Polymer dispersed liquid crystal film based on polymer transparent conductive substrate and manufacturing method thereof
  • Polymer dispersed liquid crystal film based on polymer transparent conductive substrate and manufacturing method thereof
  • Polymer dispersed liquid crystal film based on polymer transparent conductive substrate and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Step A: Add 20g of isopropanol to 1wt% PEDOT:PSS aqueous solution (the weight ratio of PEDOT and PSS is 1:2.5), mechanically stir for 40min at room temperature, and mix evenly to obtain a PEDOT solution. The above PEDOT solution is scraped Coated on a polyethylene terephthalate (PET) substrate (thickness 188 μm) with a size of 21cm*30cm, and coated two sheets in total, and controlled the wet film thickness to 300nm, and put the above two coated films into an oven Curing at 130°C for 30 minutes to obtain PEDOT conductive film, which is recorded as 1-A1 and 1-A2. Test the parameters of PEDOT conductive film: square resistance 80 ohms, full-line transmittance 86.5%, haze 0.27%;

[0052] Step B: In an environment protected from light or yellow light, 26% (mass percentage, the same below) of polyurethane acrylate (viscosity range 3000-4000cps / 25°C), 30% of isobornyl acrylate, 30% of hydroxybutyl acrylate, formazan 8% hydroxyethyl acrylate, 5% ethoxyethoxyethyl acrylate, and ...

Embodiment 2

[0058] Step A: The manufacturing method of the PEDOT conductive film is the same as step A in Example 1, wherein the selected base material is changed to a PET film with a size of 21cm*30cm and a thickness of 100 μm, and two pieces are made, which are recorded as 2-A1, 2 -A2, test the parameters of PEDOT conductive film: square resistance 81 ohms, full-line transmittance 85.8%, haze 0.25%;

[0059] Step B: In a dark or yellow light environment, mix 20% (mass percentage, the same below) of polyurethane acrylate (viscosity range 2000-3000cps / 25°C), epoxy acrylate 6% (viscosity range 6000-8000cps / 25°C) ), trimethylolpropane triacrylate 30%, 1,6-hexanediol diacrylate 30%, hydroxyethyl methacrylate 8%, acryloylmorpholine 5%, 2,4,6-trimethyl Benzoyl-diphenylphosphorous oxide 1% was mixed in proportion, mechanically stirred for 40min, then transferred to a vacuum defoaming device, and continued to defoam for 60min. It is 2-B, the test viscosity is 380cps / 25℃;

[0060] Step C: Mix 4...

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Abstract

The present invention discloses a polymer dispersed liquid crystal film based on a polymer transparent conductive substrate and a manufacturing method thereof, and belongs to the technical field of liquid crystal dimming. The polymer dispersed liquid crystal film comprises a polymer dispersed liquid crystal layer; a first transparent PET layer and a first PEDOT conductive layer constitute a firstPET-PEDOT conductive substrate; a second transparent PET layer and a second PEDOT conductive layer constitute a second PET-PEDOT conductive substrate; and the polymer dispersed liquid crystal layer islocated between the first and second PET-PEDOT conductive substrates to form a sandwich structure. According to the technical scheme of the present invention, the PET-PEDOT conductive substrate is apolymer transparent conductive film manufactured by configuring the PEDOT dispersion on the surface of a PET substrate through roll coating and then performing heating and drying in a high temperatureoven, and compared with a conventional PET-ITO conductive substrate, the PET-PEDOT conductive substrate has a simple preparation process, a low production cost, and ideal optical and electrical parameters.

Description

technical field [0001] The invention relates to the technical field of liquid crystal dimming, in particular to a polymer dispersed liquid crystal film based on a polymer transparent conductive substrate and a manufacturing method thereof. Background technique [0002] Polymer dispersed liquid crystal film, also known as PDLC film, intelligent dimming film, intelligent window film, etc., is a new type of film material obtained by coating PDLC material and transparent flexible conductive substrate by coating and rolling. Among them, the PDLC material is to mix the liquid crystal composition with the UV prepolymer, and undergo a polymerization reaction under certain conditions to form micron-sized liquid crystal droplets that are evenly dispersed in the polymer network, and then use the dielectric anisotropy of the liquid crystal molecules to Anisotropic materials with electro-optic response characteristics are obtained, which mainly work between the scattering state and the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1334G02F1/1343
CPCG02F1/1334G02F1/134309
Inventor 王科
Owner YANTAI RUSHUI OPTOELECTRONICS TECH CO LTD
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