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Low-threshold low-viscosity nematic phase liquid crystal material as well as preparation method and applications thereof

A liquid crystal material, low viscosity technology, used in liquid crystal materials, chemical instruments and methods, instruments, etc., can solve the problems of high viscosity and small dielectric anisotropy, and achieve low operating voltage, low threshold voltage and low viscosity. Effect

Active Publication Date: 2014-11-19
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the liquid crystal materials with large dielectric anisotropy that we are currently using have a corresponding viscosity that is also very large, while liquid crystal materials with low viscosity have relatively small dielectric anisotropy.

Method used

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  • Low-threshold low-viscosity nematic phase liquid crystal material as well as preparation method and applications thereof
  • Low-threshold low-viscosity nematic phase liquid crystal material as well as preparation method and applications thereof
  • Low-threshold low-viscosity nematic phase liquid crystal material as well as preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The liquid crystal material consists of 40.24% component A (A-1: R 1 =C 3 h 7 , R 2 =C 2 h 3 34.15%; A-2: R 1 =C 3 h 7 , R 2 =C 5 h 11 2.85%; A-3: R 1 =OC 2 h 5 , R 2 =C 5 h 9 3.24%), 36.21% of component B (B-1: R 1 =C 2 h 5 , R2 =C 3 h 7 11.23%; B-2: R 1 =C 2 h 5 , R 2 =C 4 h 9 8.64%; B-3: R 1 =C 3 h 9 , R 2 =C 4 h 9 8.78%; B-4: R 1 =C 3 h 9 , R 2 =C 2 h 5 Accounting for 7.56%), 11.55% of component C (C-1: R 1 =OC 4 h 9 , R 2 =C 3 h 7 2.98%; C-2: R 1 =OC 2 h 5 , X=C 2 h 4 , R 2 =C 3 h 7 2.87%; C-3: R 1 =CH 3 , X=C 6 h 12 , R 2 =C 2 h 3 2.67%; C-4: R 1 =F,X=C 6 h 12 , R 2 =C 3 h 7 Accounting for 3.03%), 5.93% of component D (D-1: R 1 =CN,R 2 =C 2 h 3 5.57%; D-2: R 1 = F, R 2 =C 6 h 12 -C 2 h 3 0.09%; D-3: R 1 = F, R 2 =C 6 h 12 -C 2 h 5 Accounting for 0.27%), 3.06% of component E (E: R 1 =C 3 h 7 , R 2 =C 3 h 7 Accounting for 3.06%), 2.68% of component F (F: R 2 =C 4 h 7 2.68%), 0.3...

Embodiment 2

[0053] The liquid crystal material consists of 37.92% component A (A-1: R 1 =C 3 h 7 , R 2 =C 2 h 3 31.37%; A-2: R 1 =C 3 h 7 , R 2 =C 5 h 11 3.91%; A-3: R 1 =OC 2 h 5 , R 2 =C 5 h 9 2.64%), 37.89% of component B (B-1: R 1 =C 2 h 5 , R 2 =C 3 h 7 12.47%; B-2: R 1 =C 2 h 5 , R 2 =C 4 h 9 9.57%; B-3: R 1 =C 3 h 9 , R 2 =C 4 h 9 8.62%; B-4: R 1 =C 3 h 9 , R 2 =C 2 h 5 accounted for 7.23%), 9.63% of component C (C-1: R 1 =OC 4 h 9 , R 2 =C 3 h 7 2.75%; C-2: R 1 =OC 2 h 5 , X=C 2 h 4 , R 2 =C 3 h 7 2.23%; C-3: R 1 =C 2 h 5 , X=C 6 h 12 , R 2 =C 2 h 3 2.14%; C-4: R 1 =C 2 h 5 , X=C 6 h 12 , R 2 =C 3 h 7 accounted for 2.51%), 8.15% of component D (D-1: R 1 = F, R 2 =C 2 h 3 5.88%; D-2: R 1 = F, R 2 =C 6 h 12 -C 2 h 3 Accounting for 2.27%), 3.45% of component E (E: R 1 =C 3 h 7 , R 2 =C 3 h 7 Accounting for 3.45%), 2.96% of component F (F: R 2 =C 4 h 7 Accounting for 2.96%) formed by melt mixing. T...

Embodiment 3

[0062] The liquid crystal material consists of 41.92% component A (A-1: R 1 =C 3 h 7 , R 2 =C 2 h 3 35.49%; A-2: R 1 =C 3 h 7 , R 2 =C 5 h 11 3.91%; A-3: R 1 =OC 2 h 5 , R 2 =C 5 h 9 Accounting for 2.52%), 35.45% of component B (B-1: R 1 =C 2 h 5 , R 2 =C 3 h 7 10.38%; B-2: R 1 =C 2 h 5 , R 2 =C 4 h 9 9.31%; B-3: R 1 =C 3 h 9 , R 2 =C 4 h 9 8.57%; B-4: R 1 =C 3 h 9 , R 2 =C 2 h 5 accounted for 7.19%), 12.17% of component C (C-1: R 1 =OC 4 h 9 , R 2 =C 3 h 73.36%; C-2: R 1 =OC 2 h 5 , X=C 2 h 4 , R 2 =C 3 h 7 2.84%; C-3: R 1 =C 2 h 5 , X=C 6 h 12 , R 2 =C 2 h 3 2.18%; C-4: R 1 =C 2 h 5 , X=C 6 h 12 , R 2 =C 3 h 7 3.09%), 9.29% of component D (D-1: R 1 = F, R 2 =C 2 h 3 6.98%; D-2: R 1 = F, R 2 =C 6 h 12 -C 2 h 3 accounted for 2.31%), 1.87% of component G (G: R 1 =C 3 h 7 Accounting for 1.87%) formed by melt mixing. The molecular structure formula and ratio of each component compound are shown in T...

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Abstract

The invention discloses a low-threshold low-viscosity nematic phase liquid crystal material as well as a preparation method and applications thereof. The liquid crystal material is prepared by melt mixing of the following raw materials in percentage by weight 37.57-42.29% of serial derivatives taking dicyclohexyl as a skeleton structure and serving as a component A, 35.13-39.76% of side group difluoro serial derivatives taking diphenylacetylene phenyl as a skeleton structure and serving as a component B, 7.56-12.43% of serial derivatives taking intermediate group-connected cyclohexyl and phenyl as a skeleton structure and serving as a component C, 5.52-9.81% of serial derivatives taking difluoroethylene-connected diphenyl as a skeleton structure and serving as a component D, 0.0-4.38% of serial derivatives taking vinyl difluoride-connected diphenyl as a skeleton structure and serving as a component E, 0.0-4.34% of serial derivatives taking ester group-connected diphenyl as a skeleton structure side group difluoro-terminated cyano and serving as a component F, and 0.0-1.87% of serial derivatives taking cyclohexyl diphenyl as a skeleton structure side group difluoro-terminated fluoro and serving as a component G.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal materials, and in particular relates to a low-threshold low-viscosity nematic liquid crystal material and a preparation method and application thereof. Background technique [0002] As an important material, liquid crystal has been widely used in various display devices due to its excellent optical and electrical properties. [0003] The electro-optic response speed of liquid crystal has a very important influence on the performance of liquid crystal display and other liquid crystal optical devices. At present, more and more liquid crystal applications require shorter response time of nematic liquid crystal materials, such as liquid crystal displays, liquid crystal spatial light modulators for adaptive optics, liquid crystal optical switches for optical communications, light modulation device etc. Reducing the viscosity of nematic liquid crystals is an effective method to improve the resp...

Claims

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Application Information

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IPC IPC(8): C09K19/44C09K19/46G02F1/1333
Inventor 杨槐张兰英李辰悦陈寅杰邹呈王慧慧
Owner PEKING UNIV
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