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Method for preparing polymer dispersed liquid crystals in experiments

A technology for dispersing liquid crystals and polymers, which is applied in optics, instruments, nonlinear optics, etc. It can solve the problems of long drying time, uneven PDLC film, and difficult control of sample changes, and achieve uniform shape, good transmittance, Curing results ideal effect

Active Publication Date: 2020-12-01
TAIYUAN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a preparation method for preparing polymer-dispersed liquid crystals in an experiment, which has the advantage that the drying oven can transmit light, and solves the problem of the existing preparation process of preparing polymer-dispersed liquid crystals. Transition union occurs when it is limited, and the result is that the PDLC film is not uniform, which affects its transmittance to visible light. The drying time of the sample placed in the drying oven is relatively long, which affects the sample during this time. The change is difficult to control. The traditional drying box can only set the drying time, temperature, and wind speed. The shape and characteristics of the sample

Method used

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  • Method for preparing polymer dispersed liquid crystals in experiments
  • Method for preparing polymer dispersed liquid crystals in experiments
  • Method for preparing polymer dispersed liquid crystals in experiments

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method for preparing polymer-dispersed liquid crystals in an experiment, comprising the following steps:

[0034] Step 1) take by weighing 5g PMMA particles with electronic balance;

[0035] Step 2) take 20ml of THF solution and 30ml of distilled water to fuse with PMMA particles;

[0036] Step 3) fusion of 15g liquid crystal and PMMA mixed solution;

[0037] Step 4) Add epoxy resin 1ml and PMMA mixed solution and stir

[0038] Step 5) Place the configured mixed solution in an ITO glass container and let it stand;

[0039] Step 6) drying the polymer-dispersed liquid crystal solution to be solidified for 6 hours.

[0040] Wherein step 2 in embodiment one) stir tetrahydrofuran solution, distilled water and PMMA particle clockwise with multifunctional stirrer and magnetic stirrer, stirring time is two hours, use multifunctional stirrer to stir two hours to make the PMMA of small crystal columnar The particles were dissolved rapidly, and then stirred with a magnetic s...

Embodiment 2

[0042] Step 1) take by weighing 7g PMMA particles with electronic balance;

[0043] Step 2) take 22ml of tetrahydrofuran solution and 35ml of distilled water to fuse with PMMA particles;

[0044] Step 3) fusion of 18g liquid crystal and PMMA mixed solution;

[0045] Step 4) Add epoxy resin 2ml and PMMA mixed solution and stir

[0046] Step 5) Place the configured mixed solution in an ITO glass container and let it stand;

[0047] Step 6) drying the polymer-dispersed liquid crystal solution to be solidified for 6 hours.

[0048] Wherein step 2 in embodiment two) stir tetrahydrofuran solution, distilled water and PMMA particle clockwise with multifunctional stirrer and magnetic stirrer, stirring time is two hours, use multifunctional stirrer to stir two hours to make the PMMA of small crystal columnar The particles were dissolved rapidly, and then stirred with a magnetic stirrer for 15 minutes to completely dissolve them.

Embodiment 3

[0050] Step 1) take by weighing 10g PMMA particle with electronic balance;

[0051]Step 2) take 23ml of tetrahydrofuran solution and 40ml of distilled water to fuse with PMMA particles;

[0052] Step 3) fusion of 20g liquid crystal and PMMA mixed solution;

[0053] Step 4) Add epoxy resin 3ml and PMMA mixed solution and stir

[0054] Step 5) Place the configured mixed solution in an ITO glass container and let it stand;

[0055] Step 6) drying the polymer-dispersed liquid crystal solution to be solidified for 6 hours.

[0056] Wherein step 2 in embodiment three) stir tetrahydrofuran solution, distilled water and PMMA particle clockwise with multifunctional stirrer and magnetic stirrer, stirring time is two hours, use multifunctional stirrer to stir two hours to make the PMMA of small crystal columnar The particles were dissolved rapidly, and then stirred with a magnetic stirrer for 20 min to completely dissolve them.

[0057] In the above-mentioned three kinds of embodimen...

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Abstract

The invention relates to the technical field of preparation of polymer dispersed liquid crystals, and discloses a method for preparing polymer dispersed liquid crystals in experiments. The method comprises the following steps: 1) weighing 5g-10g of PMMA particles by using an electronic balance; (2) taking and fusing 20ml-23ml of a tetrahydrofuran solution and 30ml-40ml of distilled water with thePMMA particles; 3) fusing 15-20g of liquid crystal and a PMMA mixed solution; 4) adding 1ml-3ml of epoxy resin in the PMMA mixed solution, and carrying out stirring; 5) placing the prepared mixed solution in an ITO glass container for standing; and 6) drying the polymer dispersed liquid crystal solution to be cured for 6 hours. According to the scheme, on the original basis, a set of measuring system is added and a device for monitoring the light scattering (or transmission) condition of a sample in real time is realized, and the morphological characteristics of the sample at the moment are judged according to the change condition, so that the volatilization of the solvent tetrahydrofuran is controlled by regulating the air speed of the drying box, and finally, the sample with uniform morphology and droplet size is prepared.

Description

technical field [0001] The invention relates to the technical field of preparing polymer-dispersed liquid crystals, in particular to a method for preparing polymer-dispersed liquid crystals in experiments. Background technique [0002] Polymer-dispersed liquid crystal, also known as PDLC, is a liquid crystal dispersed in an organic solid polymer matrix with micron-sized droplets. Since the optical axis of the small droplets composed of liquid crystal molecules is in a free orientation, its refractive index is the same as that of the matrix. The refractive index of the liquid crystal droplet does not match. When the light passes through the substrate, it is strongly scattered by the droplet and presents an opaque milky white state or a translucent state. Applying an electric field can adjust the optical axis orientation of the liquid crystal droplet. When the two refractive indices match, it will appear transparent. State, remove the electric field, the liquid crystal droplet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1334G02F1/1333G02F1/13
CPCG02F1/1334G02F1/1333G02F1/1303
Inventor 何景婷
Owner TAIYUAN INST OF TECH
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