Blue-phase liquid crystal composite and manufacturing method of blue-phase liquid crystal composite

A blue-phase liquid crystal and composite material technology, applied in liquid crystal materials, chemical instruments and methods, etc., can solve the problems of complex process, difficult production, narrow viewing angle, etc., and achieve the effect of fast electric field response, good electro-optical performance, and recovery.

Active Publication Date: 2014-03-05
KUSN INFOVISION OPTOELECTRONICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the method of synthesizing a blue-phase liquid crystal material with a large Kerr constant, on the one hand, the process of synthesizing the blue-phase liquid crystal material is very complicated and not environmentally friendly; Slow, electro-optical performance is not very ideal
However, the optimized electrode structure method also has problems such as complex electrode structure, narrow viewing angle and difficult fabrication.

Method used

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  • Blue-phase liquid crystal composite and manufacturing method of blue-phase liquid crystal composite
  • Blue-phase liquid crystal composite and manufacturing method of blue-phase liquid crystal composite
  • Blue-phase liquid crystal composite and manufacturing method of blue-phase liquid crystal composite

Examples

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Embodiment 1

[0027] This embodiment includes ferroelectric barium titanate (BaTiO 3 ) blue phase liquid crystal composite material of nanoparticles and its preparation method are described.

[0028] In this example, first, the ferroelectric BaTiO 3 The powder (for example, the diameter of the ground powder is about 1 micron) is mixed with oleic acid (surfactant) and heptane (carrier liquid) at a weight ratio of 1:2:10. After ultrasonic dispersion, the planetary high-energy ball mill for 15 hours to produce BaTiO 3 nanoparticle dispersion. Second, the ball-milled BaTiO 3 Transfer the nanoparticle dispersion to a beaker and let it stand for a few days (for example, 3 days), and then use a screen filter to remove BaTiO with a particle size larger than 30nm. 3 Nanoparticles, thereby making BaTiO with a specific particle size (average particle size) of 30nm 3 nanoparticle dispersion.

[0029] Next, the obtained BaTiO containing a specific particle size of 30nm 3 The nanoparticle dispersi...

Embodiment 2

[0039] This embodiment includes ferroelectric sulfur tin phosphide (Sn 2 P 2 S 6 ) blue phase liquid crystal composite material of nanoparticles and its preparation method are described.

[0040] In this embodiment, first, the ferroelectric Sn 2 P 2 S 6 The powder (for example, the diameter of the ground powder is about 1 micron) is mixed with oleic acid (surfactant) and heptane (carrier liquid) at a weight ratio of 1:2:10. After ultrasonic dispersion, the planetary high-energy ball mill for 50 hours to produce Sn 2 P 2 S 6 nanoparticle dispersion. Second, the Sn after ball milling 2 P 2 S 6 The nanoparticle dispersion is transferred to a beaker and left to stand for several days (for example, 3 days), and then filtered through a screen window to remove Sn with a particle size greater than 9nm. 2 P 2 S 6 Nanoparticles, thereby making Sn with a specific particle size (average particle size) of 9nm 2 P 2 S 6 nanoparticle dispersion.

[0041] Next, the obtained ...

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Abstract

The invention provides a blue-phase liquid crystal composite, which comprises blue-phase liquid crystals and ferroelectric nanoparticles, wherein the mass percentage of the blue-phase liquid crystals is 99.2-99.5%, and the mass percentage of the ferroelectric nanoparticles is 0.05-0.8%. The blue-phase liquid crystal composite is characterized by good stability, low viscosity, fast electric field response speed and low driving voltage, and is capable of realizing reversible recovery of the blue-phase liquid crystals in the electric field. The invention also relates to a manufacturing method of the blue-phase liquid crystal composite.

Description

technical field [0001] The invention relates to a liquid crystal material, in particular to a blue phase liquid crystal composite material and a manufacturing method thereof. Background technique [0002] The blue phase is a special phase state between the isotropic state and the cholesteric phase macroscopically, and often appears in high-chiral liquid crystal systems. Microscopically, the blue phase is a lattice defect phase without birefringence, and its lattice parameter size is comparable to the wavelength of visible light (hundreds of nanometers). The blue phase can be divided into three sub-phases from the crystal structure, which are named blue phase I (BPI), blue phase II (BPII) and blue phase III (BPIII), and the corresponding lattice structures are body-centered cubic structure, simple Cubic structure and amorphous state. Blue-phase liquid crystal materials are considered to be the most promising next-generation liquid crystal display materials due to their elec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/54C09K19/46
Inventor 杨槐
Owner KUSN INFOVISION OPTOELECTRONICS
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