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Preparation method of polymer dispersed liquid crystal film

A technology for dispersing liquid crystals and polymers, applied in liquid crystal materials, chemical instruments and methods, instruments, etc., can solve the problems of short service life, poor practicability, insufficient mechanical strength of polymer networks, etc., and achieve excellent mechanical properties and long service life. , good electro-optical performance

Pending Publication Date: 2022-01-28
PEKING UNIV
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Problems solved by technology

[0004] Based on this, the present invention provides a kind of preparation method of polymer dispersed liquid crystal film, to solve the polymer dispersed liquid crystal film preparation method of the prior art often appear that the mechanical strength of polymer network is not enough and make the optoelectronic property of polymer dispersed liquid crystal film The phenomenon that the stability does not meet the requirements, which leads to technical problems of poor practicability and short service life

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  • Preparation method of polymer dispersed liquid crystal film
  • Preparation method of polymer dispersed liquid crystal film
  • Preparation method of polymer dispersed liquid crystal film

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[0032] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. Terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in the preferred embodiment are only for convenience of description, and are not used to limit the scope of the present invention. The scope of implementation and the change or adjustment of its relative relationship shall also be regarded as the scope of implementation of the present invention without substantive changes in technical content.

[0033] The invention provides a kind of preparation method of polymer dispersed liquid crystal film, comprises the following steps:

[0034] Step S1, mixing the raw materials according to the following mass percentage proportions to obtain a liquid crystal mixed solution:

[0035] Liquid crystal material 30-80%;

[0036] Mercaptan monomer 5-50%;

[0037] Acrylic monomer 5-50%;

[0038] 5-50% ethylenic polymerizable monomer;

...

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Abstract

The invention discloses a preparation method of a polymer dispersed liquid crystal film. The preparation method comprises the steps of S1, mixing the following raw materials in percentage by mass to obtain a liquid crystal mixed solution: 30-80% of a liquid crystal material, 5-50% of a thiol monomer, 5-50% of an acrylate monomer, 5-50% of an alkene polymerizable monomer, 0-15% of a cross-linking agent and 0-10% of a photoinitiator; S2, taking two transparent substrates coated with a conductive ITO coating, andoppositely arranging the surfaces with the conductive ITO coating to form a liquid crystal box; S3, pouring the prepared liquid crystal mixed solution into the liquid crystal box, and solidifying the liquid crystal mixed solution through polymerization reaction; and S4, respectively connecting the conductive ITO coatings of the two transparent substrates with two electrodes of a power supply assembly. According to the preparation method of the polymer dispersed liquid crystal film, liquid crystal molecules are converted into an isotropic state on the basis of a polymerization reaction of thiol-alkene monomers, and the finally prepared polymer dispersed liquid crystal film is excellent in mechanical property, good in electro-optical property and longer in service life.

Description

technical field [0001] The invention relates to the technical field of liquid crystal thin films, in particular to a preparation method of polymer dispersed liquid crystal thin films. Background technique [0002] Polymer dispersed liquid crystal (PDLC) is a liquid crystal polymer composite material, which is widely used in architectural glass, flexible display, showcase window, automotive glass and dimming film, etc. Generally, the methods for preparing PDLC are: microcapsule method, solvent-induced phase separation method, temperature-induced phase separation method and polymerization-induced phase separation method. The most critical link in the preparation of polymer-dispersed liquid crystal film products is how to ensure that the polymer-dispersed liquid crystal film has good stability and good photoelectric properties, and the photoelectric properties are closely related to the polymer network structure. Therefore, the photopolymerization unit The selection and colloc...

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Application Information

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IPC IPC(8): C08G75/045C08J5/18C08L81/02C09K19/54G02F1/1334G02F1/1341
CPCC08G75/045C08J5/18C09K19/544G02F1/1334G02F1/1341C08J2381/02
Inventor 曲悦任云霄杨槐
Owner PEKING UNIV
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