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A kind of preparation method of curved liquid crystal material

A liquid crystal material, bending technology, applied in liquid crystal materials, chemical instruments and methods, etc., can solve the problems of high nematic phase transition temperature, narrow nematic phase temperature range, limited application and development of materials, etc., and achieve low nematic phase. Phase inversion temperature, effect of wide nematic temperature range

Inactive Publication Date: 2019-03-15
王红 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The curved liquid crystal material prepared by the above invention and the prior art has the problem of high nematic phase transition temperature and narrow nematic phase temperature range, which limits the further application and development of this kind of material

Method used

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  • A kind of preparation method of curved liquid crystal material

Examples

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Effect test

Embodiment 1

[0018] A method for preparing a curved liquid crystal material, the preparation technical scheme is as follows:

[0019] In terms of parts by mass, 24.5 parts of 2,5-bis(p-hydroxyphenyl)-1,3,4-oxadiazole, 88 parts of intermediates, 45 parts of N,N-dicyclohexylcarbodiethylene Amine, 6.5 parts of N,N-lutidine, 0.3 parts of 1,3-diiminoisoindoline, 0.7 parts of N,N'-bis(4-pyridyl)naphthalene tetracarbonyl di Imine, 0.02 parts of soybean oil ethyl morpholinium ethosulfate, 0.02 parts of tetrabutylammonium hexachloroplatinate, and 350 parts of dichloromethane were added to the thoroughly dried reaction kettle, and then Vacuumize, then replace the air in the reactor with high-purity nitrogen, and finally fill it with high-purity nitrogen for protection; then react at room temperature for 24 hours; then filter, evaporate the total solvent of the filtrate to dryness, and add 180 parts of The solvent is heated to 55° C. to dissolve, stirred for 25 minutes, cooled down to recrystallize,...

Embodiment 2

[0025] A method for preparing a curved liquid crystal material, the preparation technical scheme is as follows:

[0026] In terms of parts by mass, 23.5 parts of 2,5-bis(p-hydroxyphenyl)-1,3,4-oxadiazole, 85 parts of intermediates, 42 parts of N,N-dicyclohexylcarbodiethylene Amine, 6.8 parts of N,N-lutidine, 0.1 part of 1,3-diiminoisoindoline, 0.1 part of N,N'-bis(4-pyridyl)naphthalene tetracarbonyl di Imine, 0.01 part of soybean oil ethyl morpholinium ethosulfate, 0.01 part of tetrabutylammonium hexachloroplatinate, and 300 parts of dichloromethane were added to the thoroughly dried reaction kettle, and then Vacuumize, then replace the air in the reactor with high-purity nitrogen, and finally fill it with high-purity nitrogen for protection; then react at room temperature for 28 hours; then filter, evaporate the total solvent of the filtrate to dryness, and add 200 parts of The solvent is heated to 60° C. to dissolve, stirred for 30 minutes, cooled down to recrystallize, fil...

Embodiment 3

[0032] A method for preparing a curved liquid crystal material, the preparation technical scheme is as follows:

[0033] In terms of parts by mass, 26.5 parts of 2,5-bis(p-hydroxyphenyl)-1,3,4-oxadiazole, 91 parts of intermediates, 48 ​​parts of N,N-dicyclohexylcarbodia Amine, 6.8 parts of N,N-lutidine, 0.5 parts of 1,3-diiminoisoindoline, 1 part of N,N'-bis(4-pyridyl)naphthalene tetracarbonyl di Imine, 0.06 part of soybean oil ethyl morpholinium ethosulfate, 0.05 part of tetrabutylammonium hexachloroplatinate, and 400 parts of dichloromethane join in the reaction kettle of thorough drying, then Vacuumize, then replace the air in the reactor with high-purity nitrogen, and finally fill it with high-purity nitrogen for protection; then react at room temperature for 28 hours; then filter, evaporate the total solvent of the filtrate to dryness, and add 200 parts of The solvent is heated to 60° C. to dissolve, stirred for 30 minutes, cooled down for recrystallization, filtered, wa...

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Abstract

The invention relates to the field of preparation of new materials, in particular to a preparation method of a new bending type liquid crystal material. The invention discloses a preparation method ofa new bending type liquid crystal phase transition temperature material; according to the method, 2, 5-di(p-hydroxyphenyl)-1, 3, 4-oxadiazole is used as a central molecule, an ester bond is a bridgebond, a linear chain alkyl group is a terminal group, and the new bending type liquid crystal material is designed and synthesized. The material has a lower nematic phase transition temperature and awider nematic phase temperature range, thus being beneficial to the liquid crystal mixing preparation, the research of photoelectric properties and application.

Description

technical field [0001] The invention relates to the field of material preparation, in particular to a preparation method of a curved liquid crystal material. Background technique [0002] The curved liquid crystal compound is another new branch in the field of thermotropic liquid crystals after rod-shaped liquid crystals and discotic liquid crystals. Its unique antiferrous properties and unique molecular configuration have attracted widespread attention. [0003] CN106978193A discloses two bending liquid crystal compounds A and B, and their synthesis methods. The curved liquid crystal compounds A and B of the invention have a curved structure and can induce a blue phase. At the same time, a highly active acrylate structure is introduced at the end, and the blue phase can be further stabilized by ultraviolet polymerization. The chiral nematic liquid crystal system (67.2% SLC9023 and 32.8% R811) can produce a wide temperature blue phase after being doped with curved liquid c...

Claims

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Application Information

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IPC IPC(8): C09K19/02C09K19/34
CPCC09K19/02C09K19/348
Inventor 王红李雪芦春秀王金川
Owner 王红
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