Nano conducting particle doped PDLC (polymer dispersed liquid crystal) membrane and preparation method thereof

A conductive particle and film technology, applied in the field of PDLC film and its preparation, can solve the problems of reducing the driving voltage of PDLC, complicated preparation process and high equipment requirements, achieve excellent flexibility and lubricating performance, assist in reducing the driving voltage, and improve the quality. Effect

Inactive Publication Date: 2015-06-10
BEIJING SAN WU JIU INVESTMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the relatively high driving voltage of PDLC has become one of the reasons why it is difficult to achieve commercialization. Therefore, effectively reducing the driving voltage of PDLC while maintaining contrast and response time has become a major difficulty and hot spot in improving the photoelectric performance of PDLC. The technical improvement methods for driving voltage mainly focus on the chemical synthesis and replacement of liquid crystal and polymer itself, the research of film formation process or the change of driving mode. These methods can improve the photoelectric properties of materials to a certain extent, but the preparation process is complicated. Higher requirements for equipment

Method used

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  • Nano conducting particle doped PDLC (polymer dispersed liquid crystal) membrane and preparation method thereof
  • Nano conducting particle doped PDLC (polymer dispersed liquid crystal) membrane and preparation method thereof
  • Nano conducting particle doped PDLC (polymer dispersed liquid crystal) membrane and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0015] Take the following raw materials for subsequent use:

[0016]

[0017] The above raw materials were stirred at a speed of 300r / min for 60 minutes at room temperature to obtain a PDLC prepolymerized slurry, and then the PDLC prepolymerized slurry was coated on a release paper with a flat surface by a hot melt adhesive scraping machine. 20mm thick, and then enter the electron beam radiation curing equipment to be cured by electron beam radiation with an energy of 300keV for 0.1 second, and peel the cured film from the release paper to obtain the desired PDLC film.

Embodiment 2

[0019] Take the following raw materials for subsequent use:

[0020]

[0021] Stir the above raw materials at room temperature at a speed of 200r / min for 120 minutes to obtain PDLC prepolymerized slurry, and then apply the PDLC prepolymerized slurry on a release paper with a flat surface to 10mm thick, and then enter the electron beam radiation curing equipment to be cured by electron beam radiation with an energy of 200keV for 0.1 second, and peel the cured film from the release paper to obtain the desired PDLC film.

Embodiment 3

[0023] Take the following raw materials for subsequent use:

[0024]

[0025] Stir the above raw materials at room temperature at a speed of 100r / min for 120 minutes to obtain a PDLC prepolymerized slurry, and then apply the PDLC prepolymerized slurry on a release paper with a flat surface to 20mm thick, and then enter the electron beam radiation curing equipment to be cured by electron beam radiation with an energy of 300keV for 0.3 seconds, and peel the cured film from the release paper to obtain the required PDLC film.

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Abstract

The invention provides a nano conducting particle doped PDLC (polymer dispersed liquid crystal) membrane. The nano conducting particle doped PDLC is prepared by stirring polyurethane modified by acrylic acid, a TMPTA (trimethylolpropane triacrylate) monomer thinner, grapheme nano conductive particles, an antifoaming agents and liquid crystal for 60-120 minutes under the constant temperature ranging from 100r / min to 300r / min and subjecting the same to radiation curing with an electron beam 150-300keV in energy for 0.1-0.3 seconds. The grapheme nano conduction particles are combined with a traditional PDLC membrane, driving voltage of the PDLC membrane is lowered from dielectric constant and liquid crystal orientation, main materials for preparing the PDLC membrane are not needed to be changed, original optical-electrical characteristics of the PDLC are guaranteed, the driving voltage of the PDLC membrane is low, good thermal stability and mechanical stability are achieved, and simpleness in preparation process is realized.

Description

technical field [0001] The invention relates to a PDLC film and a preparation method thereof, in particular to a PDLC film doped with nano conductive particles and a preparation method thereof. Background technique [0002] Polymer Dispersed Liquid Crystal (PDLC for short) is a liquid crystal / polymer composite material in which liquid crystal is uniformly dispersed in a polymer matrix in the form of droplets. Inexpensive, easy to process, and widely used, it can be used as electro-optical windows, liquid crystal light thresholds, phase gratings, holographic recording films, etc., and is a hot research topic in the field of display technology. [0003] It is generally believed that the working principle of PDLC is: PDLC is composed of polymer matrix and liquid crystal droplets, in which the optical axis of liquid crystal is adjustable by electric field. When sufficient driving voltage is applied, the optical axis of liquid crystal is affected by the electric field along the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1334C08F290/00C08F2/54C08K3/04
CPCC08F2/54C08F290/00C08K3/04G02F1/1334C08F222/145
Inventor 钱俊温少强马立胜唐超群高峰
Owner BEIJING SAN WU JIU INVESTMENT
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