Twist-bend nematic liquid crystal (LC) dimer-based material and use thereof, and LC-based cholesteric heliconical (CH) material and use thereof

Inventors: Zhigang Zheng (Shanghai, CN); Conglong Yuan (Shanghai, CN); Jiajun Chen (Shanghai, CN); Yuxing Zhan (Shanghai, CN); Huixian Liu (Shanghai, CN)

Assignee: EAST CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY

C09K19/12 C09K19/0208 C09K2019/122 C09K2019/2035

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Quick Facts

Patent No.: US 12686821
App. No.: 18/579,713
Granted: Jul 21, 2026
Kind: B2

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Abstract

Provided are a twist-bend nematic (N TB ) LC dimer-based material and use thereof, and an LC-based cholesteric heliconical (CH) material and use thereof. The N TB LC dimer-based material is at least one selected from the group consisting of CBnCB, CBnOCB, and CBOnOCB, with n being a positive integer of 3 to 15. Based on ultra-stable properties of the material, the disclosure further provides the LC-based CH material, which uses the LC dimer-based material as a key raw material and integrates a conventional nematic LC monomer material and a chiral molecule.

Claims (33)

1 . An ambient-temperature stable non-crystalline twist-bend nematic (N TB ) liquid crystal (LC) material, consisting of the following components by mass percentage: 30% to 60% of CB7CB, 15% to 45% of CB9CB, and 15% to 25% of CB11CB; wherein

the CB7CB has a structure as follows:

the CB9CB has a structure as follows:

and

the CB11CB has a structure as follows:

2 . The ambient-temperature stable non-crystalline N TB LC material of claim 1 , consisting of the following components by mass percentage: 40% to 60% of the CB7CB, 20% to 40% of the CB9CB, and 15% to 20% of the CB11CB.

3 . The ambient-temperature stable non-crystalline N TB LC material of claim 1 , consisting of the following components by mass percentage: 60% of the CB7CB, 20% of the CB9CB, and 20% of the CB11CB; alternatively,

consisting of the following components by mass percentage: 40% of the CB7CB, 40% of the CB9CB, and 20% of the CB11CB.

4 . The ambient-temperature stable non-crystalline N TB LC material of claim 2 , consisting of the following components by mass percentage: 50% of the CB7CB, 35% of the CB9CB, and 15% of the CB11CB; alternatively,

consisting of the following components by mass percentage: 55% of the CB7CB, 30% of the CB9CB, and 15% of the CB11CB.

5 . An ambient-temperature stable non-crystalline LC cholesteric heliconical (CH) material, consisting of the following components by mass percentage: 45% to 55% of an ambient-temperature stable non-crystalline N TB LC material, 40% to 52% of a nematic LC monomer material, and 0.1% to 10% of a chiral molecule; wherein

the ambient-temperature stable non-crystalline N TB LC material consists of the following components by mass percentage: 30% to 60% of CB7CB, 15% to 45% of CB9CB, and 15% to 25% of CB11CB; wherein

the CB7CB has a structure as follows:

the CB9CB has a structure as follows:

and

the CB11CB has a structure as follows:

6 . The ambient-temperature stable non-crystalline LC CH material of claim 5 , wherein the nematic LC monomer material is selected from the group consisting of 5CB, 8CB, and 70CB, having structures as follows

7 . The ambient-temperature stable non-crystalline LC CH material of claim 5 , wherein the chiral molecule is selected from the group consisting of CB15, R811, S811, R2011, S2011, R1011, S1011, R5011, and S5011, having structures as follows

8 . The ambient-temperature stable non-crystalline LC CH material of claim 5 , consisting of the following components by mass percentage: 45% to 50% of the ambient-temperature stable non-crystalline N TB LC material, 45% to 52% of the nematic LC monomer material, and 1% to 5% of the chiral molecule.

9 . The ambient-temperature stable non-crystalline LC CH material of claim 8 , consisting of the following components by mass percentage: 45% of the ambient-temperature stable non-crystalline N TB LC material, 52% of the nematic LC monomer material, and 3% of the chiral molecule.

10 . The ambient-temperature stable non-crystalline LC CH material of claim 8 , wherein the ambient-temperature stable non-crystalline N TB LC material consists of the following components by mass percentage: 40% to 60% of the CB7CB, 20% to 40% of the CB9CB, and 15% to 20% of the CB11CB.

11 . The ambient-temperature stable non-crystalline LC CH material of claim 10 , wherein the ambient-temperature stable non-crystalline N TB LC material consists of the following components by mass percentage: 60% of the CB7CB, 20% of the CB9CB, and 20% of the CB11CB, alternatively, consists of the following components by mass percentage: 40% of the CB7CB, 40% of the CB9CB, and 20% of the CB11CB.

12 . The ambient-temperature stable non-crystalline LC CH material of claim 10 , wherein the ambient-temperature stable non-crystalline N TB LC material consists of the following components by mass percentage: 50% of the CB7CB, 35% of the CB9CB, and 15% of the CB11CB, alternatively, consists of the following components by mass percentage: 55% of the CB7CB, 30% of the CB9CB, and 15% of the CB11CB.

13 . A display panel or a display device, comprising the ambient-temperature stable non-crystalline LC CH material of claim 5 .

14 . The display panel or a display device of claim 13 , wherein the nematic LC monomer material is selected from the group consisting of 5CB, 8CB, and 70CB, and

the chiral molecule is selected from the group consisting of CB15, R811, S811, R2011, S2011, R1011, S1011, R5011, and S5011,

15 . The display panel or a display device of claim 13 , wherein the ambient-temperature stable non-crystalline LC CH material consists of the following components by mass percentage: 45% to 50% of the ambient-temperature stable non-crystalline N TB LC material, 45% to 52% of the nematic LC monomer material, and 1% to 5% of the chiral molecule.

16 . The display panel or a display device of claim 15 , wherein the ambient-temperature stable non-crystalline LC CH material consists of the following components by mass percentage: 45% of the ambient-temperature stable non-crystalline N TB LC material, 52% of the nematic LC monomer material, and 3% of the chiral molecule.

17 . The display panel or a display device of claim 15 , wherein the ambient-temperature stable non-crystalline N TB LC material consists of the following components by mass percentage: 40% to 60% of the CB7CB, 20% to 40% of the CB9CB, and 15% to 20% of the CB11CB.

18 . The display panel or a display device of claim 17 , wherein the ambient-temperature stable non-crystalline N TB LC material consists of the following components by mass percentage: 60% of the CB7CB, 20% of the CB9CB, and 20% of the CB11CB; or

the ambient-temperature stable non-crystalline N TB LC material consists of the following components by mass percentage: 40% of the CB7CB, 40% of the CB9CB, and 20% of the CB11CB; or

the ambient-temperature stable non-crystalline N TB LC material consists of the following components by mass percentage: 50% of the CB7CB, 35% of the CB9CB, and 15% of the CB11CB; or

the ambient-temperature stable non-crystalline N TB LC material consists of the following components by mass percentage: 55% of the CB7CB, 30% of the CB9CB, and 15% of the CB11CB.