Double-transition-metal-based composite liquid crystal material and preparation method thereof

A transition metal, liquid crystal material technology, applied in liquid crystal materials, chemical instruments and methods, etc., can solve problems such as agglomeration, graphene is expensive, and the preparation process is complicated.

Pending Publication Date: 2021-06-08
苏州克里斯图材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the doping of graphene is prone to agglomeration, which leads to unstable broadband reflection effect; at the same time, graphene is expensive and the preparation process is complicated, which greatly increases the production cost of composite liquid crystals

Method used

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  • Double-transition-metal-based composite liquid crystal material and preparation method thereof
  • Double-transition-metal-based composite liquid crystal material and preparation method thereof
  • Double-transition-metal-based composite liquid crystal material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 180 parts of copper nitrate, 60 parts of titanium tetrachloride and 35 parts of 2-aminoterephthalic acid in a three-necked flask, then add 120 parts of dimethyl sulfoxide and 30 parts of n-butanol , continuously stirred for 15 minutes until completely dissolved, reacted at 45°C for 24 hours; centrifuged and filtered the mixed solution, washed the collected product three times with acetone, and freeze-dried for 48 hours to obtain Cu-Ti double-transition metal-based three-dimensional network nanoparticles;

[0025] Disperse the Cu-Ti double-transition metal-based three-dimensional network nanoparticles prepared above in acetone to prepare a mixed solution with a mass fraction of 0.5 wt%, transfer 5.2 parts to a three-necked flask, and perform ultrasonic dispersion for 30 minutes to obtain a mixture I stand by.

[0026] Subsequently, the liquid crystal polymer monomers A (n=2) and F (n=6), R5011, IRG369, EOEOEA, perylene, etc. are mixed according to the mass ratio of...

Embodiment 2

[0029] Weigh 220 parts of copper sulfate, 110 parts of silver nitrate and 165 parts of 2,5-diaminoterephthalic acid in a three-necked flask, then add 100 parts of N,N-dimethylformamide and 10 A portion of n-butanol was continuously stirred for 30 minutes until completely dissolved, and reacted at 80°C for 12 hours; the mixture was centrifuged and filtered, and the collected product was washed 3 times with acetone, and freeze-dried for 72 hours to obtain a Cu-Ag double-transition metal-based three-dimensional mesh nanoparticles;

[0030] Disperse the Cu-Ag double-transition metal-based three-dimensional network nanoparticles prepared above in acetone to prepare a mixed solution with a mass fraction of 0.5 wt%, and take 5.1 parts of it in a three-necked flask for ultrasonic dispersion for 50 minutes to obtain a mixture I stand by.

[0031] Subsequently, the liquid crystal polymer monomer A (n=6), R2011, IRG2959, IDA, perylene, etc. are fully mixed according to the ratio of 45 p...

Embodiment 3

[0034] Weigh respectively 260 parts of copper sulfate, 190 parts of chromium chloride and 51 parts of 4-(4-pyridyl) benzoic acid in a three-necked flask, then add 190 parts of N,N-dimethylformamide and 20 parts of n-butanol, continuously stirred for 60 minutes until completely dissolved, and reacted at 180°C for 48 hours; centrifuged and filtered the mixed solution, washed the collected product three times with acetone, and freeze-dried for 72 hours to obtain Cu-Cr double transition metal base Three-dimensional network nanoparticles;

[0035] Disperse the Cu-Cr double-transition metal-based three-dimensional network nanoparticles prepared above in acetone to prepare a mixed solution with a mass fraction of 5.5 wt%. Take 1.3 parts in a three-necked flask and perform ultrasonic dispersion for 20 minutes to obtain a mixture I stand-by.

[0036] Subsequently, the liquid crystal polymer monomers B (n=6) and E (n=2), R1011, IRG907, PETA, Rhodamine 123, etc. were ratioed as 10 parts...

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Abstract

The invention discloses a double-transition-metal-based composite liquid crystal material and a preparation method thereof. The preparation method comprises the steps of adding a transition metal source precursor A, a transition metal source precursor B and an organic ligand unit into a reactor, adding an organic solvent, and obtaining mixed material liquid; treating the mixed material liquid to obtain double-transition-metal-based three-dimensional network nanoparticles, and adding a solvent into the double-transition-metal-based three-dimensional network nanoparticles to obtain a mixture I; fully mixing a liquid crystal polymer monomer, a chiral dopant, an initiator, a modifier monomer and a fluorescent dye to obtain a mixed solution II; and adding the mixture I into the mixture solution II, and continuously stirring for reaction to obtain the double-transition-metal-based composite liquid crystal material. The photoelectric property of the electrochromic liquid crystal can be improved, and the threshold voltage of an electrochromic liquid crystal device can be reduced. Doping of the three-dimensional network nanoparticles in the liquid crystal phase can reduce the maximum photopolymerization reaction rate of the system, improve the phase separation degree of the polymer dispersed liquid crystal system and improve the light wave utilization rate.

Description

technical field [0001] The invention belongs to the technical field of composite liquid crystal materials, and in particular relates to a double-transition metal-based composite liquid crystal material and a preparation method thereof. Background technique [0002] Liquid crystal material is an intermediate phase between solid and liquid, which can flow and has crystalline optical properties. It is currently widely used in electronic products. Based on the handwriting function of cholesteric bistable liquid crystals and the energy-saving characteristics of maintaining display without continuous power supply, it has been more and more widely used in the field of handwriting tablets. Cholesteric liquid crystals for display have two stable states, FC state and P state. When pressed, it turns into P state. At this time, it can reflect a fixed wavelength relationship, and the appearance shows handwriting. After applying an electric field, P state changes back to FC state. , show...

Claims

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Application Information

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IPC IPC(8): C09K19/58C09K19/38C08G83/00
CPCC09K19/586C09K19/3857C08G83/008C09K2019/0433C09K2019/523
Inventor 齐悦贺重隆王淡宁程洋
Owner 苏州克里斯图材料科技有限公司
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