Liquid crystal elastomer film as well as preparation method, driving method and application thereof

A technology of liquid crystal elastomers and liquid crystal monomers, applied in liquid crystal materials, chemical instruments and methods, nonlinear optics, etc., can solve problems such as operation troubles, pattern restrictions, and smallest pixel restrictions, and achieve strong flexibility and precision High precision and simple operation

Active Publication Date: 2020-07-31
SOUTH CHINA NORMAL UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]In recent years, patterned liquid crystal elastomer films generally use masks to orient liquid crystals in a specific way, but the masks currently used are generally expensive, limited by patterns, There are problems such as the smallest pixel limitation and troublesome operation, which limit the design and application of patterning of liquid crystal elastomer films
In addition, the size of the three-dimensional structure of the surface of the liquid crystal elastomer film plays a decisive role in its surface properties and applications. Facilitating the Application of Liquid Crystal Elastomer Film Surfaces

Method used

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  • Liquid crystal elastomer film as well as preparation method, driving method and application thereof
  • Liquid crystal elastomer film as well as preparation method, driving method and application thereof
  • Liquid crystal elastomer film as well as preparation method, driving method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A kind of liquid crystal elastomer film, its preparation method comprises the following steps:

[0033] S1. Dissolving the azo-based photo-alignment material SD1 with N,N-dimethylformamide, and then spin-coating it on a glass substrate to form an alignment coating;

[0034] S2. Prepare a liquid crystal box by using a glass substrate with an orientation coating; then design a digital mask, the specific structure is as follows figure 1 As shown, the circular liquid crystal directors are arranged, and the alignment coating inside the liquid crystal cell is aligned using a digital mask lithography system;

[0035] S3. Take 24 parts of liquid crystal monomer A, 72 parts of liquid crystal monomer B, 3 parts of azobenzene, and 1 part of photoinitiator, mix and prepare a liquid crystal mixture, and then fill the liquid crystal mixture into a liquid crystal box; wherein, liquid crystal monomer A Specifically, 1,4-bis-[4-(6-acryloyloxyhexyloxy)-benzoyloxy]-2-methylbenzene is use...

Embodiment 2

[0038] A kind of liquid crystal elastomer film, its preparation method comprises the following steps:

[0039] S1. Dissolving the azo-based photo-alignment material PAAD-22 with N,N-dimethylformamide, and then spin-coating it on a glass substrate to form an alignment coating;

[0040] S2. Design a digital mask, the specific structure is as follows figure 2As shown, the liquid crystal directors are arranged radially, and the alignment coating on the glass substrate is oriented using a digital mask lithography system to obtain a photo-alignment layer; then a liquid crystal is prepared by using a glass substrate with a photo-alignment layer Box;

[0041] S3. Take 15 parts of liquid crystal monomer A, 80 parts of liquid crystal oligomer, 3 parts of azobenzene, and 2 parts of photoinitiator, mix and prepare a liquid crystal mixture, and then fill the liquid crystal mixture into a liquid crystal box; wherein, liquid crystal monomer A Specifically, 1,4-bis-[4-(6-acryloyloxyhexylox...

Embodiment 3

[0044] A kind of liquid crystal elastomer film, its preparation method comprises the following steps:

[0045] S1, dissolving the azo-based photo-alignment material SD1 with N-methylpyrrolidone, and then spin-coating it on a glass substrate to form an alignment coating;

[0046] S2. Prepare a liquid crystal box by using a glass substrate with an orientation coating; then design a digital mask, the specific structure is as follows image 3 As shown, the liquid crystal director arrangement in the curved and exhibited areas, and the alignment coating inside the liquid crystal cell is aligned using a digital mask lithography system;

[0047] S3. Take 21 parts of liquid crystal monomer A, 63 parts of liquid crystal monomer B, 11 parts of liquid crystal oligomer, 3 parts of azobenzene, and 2 parts of photoinitiator, mix and prepare a liquid crystal mixture, and then fill the liquid crystal mixture into a liquid crystal box Among them, liquid crystal monomer A specifically adopts 1,...

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Abstract

The invention discloses a liquid crystal elastomer film as well as a preparation method, a driving mode and application thereof. The preparation method comprises the following steps: 1) dissolving a material of a photo-alignment layer in a solvent, and then covering a substrate with the material to form an alignment coating; 2) orienting the orientation coating through a digital mask plate by using a DMD digital mask photoetching system to obtain a photo-orientation layer, and preparing a liquid crystal box by using a substrate with the photo-orientation layer; or, preparing a liquid crystal box by adopting the substrate with the orientation coating, and orienting the orientation coating by using a DMD digital mask photoetching system through a digital mask plate; 3) filling a liquid crystal box with a liquid crystal mixture containing a liquid crystal monomer, azobenzene and a photoinitiator; and 4) placing the liquid crystal box on a heating stage, and polymerizing in a blue light zone. The preparation method of the liquid crystal elastomer film is simple to operate, strong in flexibility and high in accuracy, and the prepared product film can realize dynamic response of micro surface morphology under light and / or temperature stimulation.

Description

technical field [0001] The invention relates to the technical field of smart surface materials, in particular to a liquid crystal elastomer film and its preparation method, driving method and application. Background technique [0002] Organisms in nature have surfaces that are in direct contact with the environment, and various microscopic topography on the surface have special functions, and organisms use their functions to act on the environment. Inspired by nature, humans have studied a large number of surface smart materials with such functions, and have been applied in the fields of regulating hydrophilicity and hydrophobicity, self-cleaning, and climbing robots. controlled and statically irreversible. [0003] In recent years, liquid crystal elastomer materials have attracted the attention of many researchers as stimuli-affecting materials. The liquid crystal elastomer material is a type of liquid crystal polymer network. The degree of polymerization of the liquid cr...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L33/14C08F2/48C08F220/36C08F222/20C08F216/14C08F220/20C09K19/38C09K19/56G02F1/1337
CPCC08J5/18C09K19/3857C09K19/56C08F220/36C08F220/20C08F2/48G02F1/133788G02F1/133719C08J2333/14C08F216/1416C08F222/20
Inventor 袁冬游雨欣刘丹青周国富
Owner SOUTH CHINA NORMAL UNIVERSITY
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