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High-birefringence nematic phase liquid crystal material and application thereof

A technology of liquid crystal materials and nematic phases, applied in liquid crystal materials, instruments, chemical instruments and methods, etc., can solve the problems of not meeting the electro-optical performance indicators of PDLC films at the same time, and achieve the improvement of off-state scattering intensity and electric field response speed, wide Use temperature range to meet the effect of building energy saving

Active Publication Date: 2014-12-03
山东盛华新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is currently no nematic liquid crystal material specially developed for the preparation of PDLC films on the market. The preparation of PDLC films by using existing commercial liquid crystals in the market cannot meet the needs of different electro-optic performance indicators of PDLC films. Therefore, it is necessary to develop a PDLC film. It is very important to use liquid crystal materials

Method used

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  • High-birefringence nematic phase liquid crystal material and application thereof
  • High-birefringence nematic phase liquid crystal material and application thereof
  • High-birefringence nematic phase liquid crystal material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Prepare the nematic liquid crystal mixture according to the corresponding compounds and mass fractions in Table 1, and ultrasonically for more than 1 h to ensure that the components are evenly mixed. The obtained liquid crystal mixture was poured into a liquid crystal cell with a cell thickness of 10 μm for performance testing.

[0053] Compound type and mass percent and performance parameters in the nematic liquid crystal mixture of Table 1 Example 1

[0054]

[0055]

Embodiment 2

[0057] Prepare the nematic liquid crystal mixture according to the corresponding compounds and mass fractions in Table 2, and ultrasonically for more than 1 h to ensure that the components are mixed evenly. The obtained liquid crystal mixture was poured into a liquid crystal cell with a cell thickness of 10 μm for performance testing.

[0058] Compound species and mass percent and performance parameters in the nematic liquid crystal mixture of the second embodiment of table 2

[0059]

[0060]

Embodiment 3

[0062] Prepare the nematic liquid crystal mixture according to the corresponding compounds and mass fractions in Table 3, and ultrasonically for more than 1 h to ensure that the components are mixed evenly. The obtained liquid crystal mixture was poured into a liquid crystal cell with a cell thickness of 10 μm for performance testing.

[0063] Compound type and mass percent and performance parameters in the nematic liquid crystal mixture of the third embodiment of table 3

[0064]

[0065]

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Abstract

The invention discloses a high-birefringence nematic phase liquid crystal material which is prepared by mixing the following components in percentage by mass: 43-63% of biphenyl cyanide compound A, 5-10% of biphenyl alkyne compound B, 1-5% of ester compound C, 4-8% of compound D, 4-11% of compound F, 2-6% of compound E and 10-30% of compound G. The seven types of compounds with different properties are mixed to achieve the optimal properties of the liquid crystal material, so that the liquid crystal material has the advantages of high birefringence value, low viscosity, high dielectric anisotropy and wide application temperature range. When being used for preparing PDLC (polymer dispersed liquid crystal) films, the material can enhance the off-state scattering intensity and electric field response speed of the PDLC film, lower the drive voltage of the PDLC film and widen the application temperature range, so that the PDLC film is more energy-saving.

Description

technical field [0001] The invention relates to liquid crystal material technology, in particular to a nematic phase liquid crystal material with a large birefringence index, which is suitable as a material for preparing polymer dispersed liquid crystal films. Background technique [0002] With the acceleration of my country's modernization and the implementation of the strategy of building a well-off society in an all-round way, people's requirements for work and living facilities and means of transportation are getting higher and higher, more humane and personalized, and more people-oriented, so as to adapt to human life and labor. and aesthetic needs. Existing glass deep processing technology and products can no longer meet people's growing demands. The development of multifunctional and highly controllable glass products is an inevitable demand for social and economic development. [0003] Polymer-dispersed liquid crystal (PDLC) film is a composite material formed by un...

Claims

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Application Information

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IPC IPC(8): C09K19/46C08F283/06C08F220/28C08F220/18C08F222/20C08F2/48G02F1/1333G02F1/1334
Inventor 杨槐宋平张兰英高延子王慧慧
Owner 山东盛华新材料科技股份有限公司
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