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Liquid crystal elastomer composite material for optical actuator and preparation method thereof

A technology of liquid crystal elastomers and composite materials, applied in the direction of liquid crystal materials, chemical instruments and methods, etc., can solve the problems of slow response rate, small deformation, difficult remote control, etc. fast response effect

Active Publication Date: 2014-01-22
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of slow response rate, small deformation and difficult remote control of existing actuators constructed of single materials, and to provide a liquid crystal elastomer composite material for optical actuators and its preparation method. In order to realize the construction of photoactuators with fast response rate, large deformation and large output force

Method used

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  • Liquid crystal elastomer composite material for optical actuator and preparation method thereof
  • Liquid crystal elastomer composite material for optical actuator and preparation method thereof
  • Liquid crystal elastomer composite material for optical actuator and preparation method thereof

Examples

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Effect test

Embodiment 1

[0046] 1) Add graphene oxide (0.31mg) into 5mL acetone for ultrasonic treatment, then add 2,5-bis(4′-butoxybenzoyloxy)-4″-benzoyloxybutyl- 1-Acrylic liquid crystal monomer (0.1g), 1,6-hexanediol diacrylate crosslinking agent (4mg) and Irgacure369 photoinitiator (0.32mg), continue to stir to obtain a black dispersion liquid;

[0047] 2) Spin-coat the dispersion on a PTFE sheet with a smooth surface, then slowly raise the temperature to 100°C in a dark and nitrogen atmosphere, keep it warm for 10 minutes, then slowly cool down to 80°C, and immediately irradiate it with 365nm light for 15 minutes, and then The temperature was raised to 90°C and irradiated for 15 minutes, and the reaction was completed to obtain a liquid crystal elastomer composite film containing 0.3wt% graphene oxide.

Embodiment 2

[0049] 1) Add graphene (0.31mg) into 5mL acetone for ultrasonic treatment, then add 2,5-bis(4′-butoxybenzoyloxy)-4″-benzoyloxybutyl-1 -Acrylic liquid crystal monomer (0.1g), 1,6-hexanediol diacrylate crosslinker (4mg) and Irgacure369 photoinitiator (0.32mg), continue stirring to obtain a black dispersion liquid;

[0050] 2) Spin-coat the dispersion on a PTFE sheet with a smooth surface, then slowly raise the temperature to 100°C in a dark and nitrogen atmosphere, keep it warm for 10 minutes, then slowly cool down to 80°C, and immediately irradiate it with 365nm light for 15 minutes, and then The temperature was raised to 90°C and irradiated for 15 minutes, and the reaction was completed to obtain a liquid crystal elastomer composite film containing 0.3wt% graphene.

Embodiment 3

[0052] 1) Add carbon nanotubes (0.31 mg) to 5 mL of acetone for ultrasonic treatment, then add 2,5-bis(4′-butoxybenzoyloxy)-4″-benzoyloxybutyl- 1-Acrylic liquid crystal monomer (0.1g), 1,6-hexanediol diacrylate crosslinking agent (4mg) and Irgacure369 photoinitiator (0.32mg), continue to stir to obtain a black dispersion liquid;

[0053] 2) Spin-coat the dispersion on a PTFE sheet with a smooth surface, then slowly raise the temperature to 100°C in a dark and nitrogen atmosphere, keep it warm for 10 minutes, then slowly cool down to 80°C, and immediately irradiate it with 365nm light for 15 minutes, and then The temperature was raised to 90° C. and irradiated for 15 minutes, and the reaction was completed to obtain a liquid crystal elastomer composite film containing 0.3 wt % carbon nanotubes.

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Abstract

The invention discloses a liquid crystal elastomer composite material for an optical actuator and a preparation method thereof. The composite material is prepared by in-situ polymerization of a nano carbon material as a filler and a thermotropic liquid crystal elastomer as a matrix, wherein the weight ratio of the nano carbon material to the thermotropic liquid crystal elastomer is 0.02-3:100, and the nano carbon material is graphene, graphene oxide or carbon nanotubes. The composite material can efficiently absorb near infrared lasers; optical energy is converted into heat energy so as to trigger the liquid crystal elastomer to generate phase transition, so that the liquid crystal elastomer which has no light stimulus response in intrinsic performance can be used in the optical actuator; at the same time, the carbon nanotube reinforced liquid crystal elastomer can increase output force of the actuator; moreover, the carbon nanotubes shrink when being irradiated by the near infrared lasers, the shrinkage behavior is consistent to a liquid crystal elastomer thermal shrinkage behavior in the deformation direction, and synergistic effect of the carbon nanotubes and the liquid crystal elastomer improves the response rate and the deformation quantity of the actuator.

Description

technical field [0001] The invention relates to the fields of smart materials and polymer-based nanocomposite materials, in particular to a liquid crystal elastomer composite material for a photoactuator and a preparation method thereof. Background technique [0002] An actuator refers to an actuator that converts electrical energy, thermal energy, and light energy into mechanical energy under external stimulation such as electricity, heat, and light. Among them, the construction of polymer actuators with light as the driving source has outstanding advantages such as remote control, simplified mechanism and easy integration, low cost, light weight and easy processing and molding. Smart materials for the construction of actuators require both responsiveness and actuation. The deformation mechanism of polymer photoactuators is derived from photoinduced molecular isomerization and light-triggered physical deformation. At present, mainly a few polymers such as azobenzenes exhib...

Claims

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Application Information

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IPC IPC(8): C08F222/14C08F2/48C08K3/04C08K9/00C08K9/04C08K7/00C09K19/02
Inventor 杨应奎彭仁贵唐伟董晓利
Owner HUBEI UNIV
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