Method for carrying out patterning orientation on liquid crystal elastomer and preparation method of touch display device

A liquid crystal elastomer and patterning technology, which is applied in the direction of instruments, nonlinear optics, optics, etc., can solve the problems of complex process, high production cost of touch display devices, hindering the market application of touch display technology, etc., and achieve simplification of preparation process, Promoting market application and low production cost

Pending Publication Date: 2021-12-10
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional touch display technology requires a multi-layer structure for combined design, the process is complicated, and the production cost of touch display devices is high, which hinders the market application of touch display technology

Method used

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  • Method for carrying out patterning orientation on liquid crystal elastomer and preparation method of touch display device
  • Method for carrying out patterning orientation on liquid crystal elastomer and preparation method of touch display device
  • Method for carrying out patterning orientation on liquid crystal elastomer and preparation method of touch display device

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preparation example Construction

[0060] The second aspect of the present application provides a method for manufacturing a touch display device, the method comprising the following steps: S100, providing a liquid crystal elastomer with a cross-linked network structure containing dynamic covalent bonds, the liquid crystal elastomer having a single domain Protrusion; S200, applying electrothermal drive or photothermal drive to the protrusion, wherein the electrothermal drive method is to place a polyimide electrothermal film under the protrusion, and the photothermal drive method is to place The photothermal responsive material is doped in the protrusions; S300, heat-treating the protrusions, so that the dynamic covalent bonds in the protrusions undergo an exchange reaction to form a new cross-linked network structure and fix the orientation , forming protrusions with a fixed orientation; S400, adjusting the expansion and contraction parameters of each protrusion through the electrical processing control of the ...

Embodiment 1

[0086] (1) Preparation of liquid crystal elastomer samples

[0087] A mixture of 0.298 g (1 mmol) of epoxy resin mesogen p-diphenol diglycidyl ether (DGE-DHBP) and 0.202 g (1 mmol) of sebacic acid was placed in a culture medium covered with a polytetrafluoroethylene (PTFE) membrane. Melt in a heating mantle at 180°C and stir gently to mix evenly. Then, 13.9 mg (0.1 mmol) of 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) was added to the mixture, and the mixture was stirred while adding to make the mixture uniform. When the viscosity of the reaction system increases but it has not yet reacted to a solid and can still be drawn, it is taken out and cooled slightly to obtain a prepolymer. Put the prepolymer in two layers of polytetrafluoroethylene (PTFE) films, use tin foil as a gasket to control the thickness of the prepolymer film, and then heat the prepolymer in a tablet press at 6MPa and 180°C Press and cure for 6 hours to obtain a liquid crystal elastomer sample with a target th...

Embodiment 2

[0094] (1) Preparation of liquid crystal elastomer samples

[0095] A mixture of 0.340 g (1 mmol) of 4,4'-dihydroxy-α-methyl-1,2-stilbene diglycidyl ether (DGE-DHMS) and 0.202 g (1 mmol) of sebacic acid was placed in a covered In a petri dish with polytetrafluoroethylene (PTFE) film, melt at 180°C in a heating mantle, and stir gently to make it evenly mixed. Then, 13.9 mg (0.1 mmol) of 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) was added to the mixture, and the mixture was stirred while adding to make the mixture uniform. When the viscosity of the reaction system increases but it has not yet reacted to a solid and can still be drawn, it is taken out and cooled slightly to obtain a prepolymer. Put the prepolymer in two layers of polytetrafluoroethylene (PTFE) films, use tin foil as a gasket to control the thickness of the prepolymer film, and then heat the prepolymer in a tablet press at 6MPa and 180°C Press and cure for 6 hours to obtain a liquid crystal elastomer sample with...

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Abstract

The invention provides a method for carrying out patterning orientation on a liquid crystal elastomer and a preparation method of a touch display device. The liquid crystal elastomer is of a cross-linked network structure containing dynamic covalent bonds. The method for carrying out patterning orientation on the liquid crystal elastomer comprises the following steps: orienting at least part of molecular chains in a cross-linked network structure of a liquid crystal elastomer along a preset direction; applying electric heating driving or photo-thermal driving to the liquid crystal elastomer, wherein the electric heating driving mode is that a polyimide electric heating film is arranged on the liquid crystal elastomer, and the photo-thermal driving mode is that a photo-thermal response material is doped in the molecular chain of the liquid crystal elastomer; and heating the pre-oriented molecular chain of the liquid crystal elastomer through electric processing control of the polyimide electrothermal film or optical processing control of the photo-thermal response material, so that dynamic covalent bonds are subjected to an exchange reaction to form a new cross-linked network structure. According to the invention, mechanical processing and batch production of liquid crystal elastomer three-dimensional dynamic structures with different requirements and various complex patterns can be realized.

Description

technical field [0001] The present application relates to the field of liquid crystal materials, in particular to a method for patterning and aligning liquid crystal elastomers and a method for preparing a touch display device. Background technique [0002] In the Internet age, audio and visual technologies have had a huge impact on people's perception, changing people's living habits and ways of thinking. With the development of wearable electronic devices and smart medical care, people have also started the further application and development of tactile technology, making the communication, cooperation and integration between human tactile systems and machines possible. [0003] Touch display technology is a hot spot in the development of human tactile technology, and it will have a huge application prospect in the future era of human-computer interaction. The traditional touch display technology requires a multi-layer structure for combined design, the process is complic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/00C08J5/18C08J3/24C08L63/00G02F1/1337
CPCC08J7/08C08J5/18C08J3/247G02F1/1337C08J2363/00
Inventor 吉岩姚艳锦
Owner TSINGHUA UNIV
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