Liquid crystal elastomer fiber capable of being spirally bent and preparation method and application thereof

A technology of liquid crystal elastomers and liquid crystal monomers, applied in the direction of liquid crystal materials, fiber chemical characteristics, chemical instruments and methods, etc., can solve the problem of single expansion and deformation, and achieve the effect of improving the deformation range and fiber performance

Active Publication Date: 2021-12-17
SOUTH CHINA NORMAL UNIVERSITY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The liquid crystal elastomer fiber can realize three-dimensional spiral crimping, overcomes the defect of single stretching deformation of the existing liquid crystal elastomer material, and has the characteristics of larger deformation range, thermal deformation and reversible recovery

Method used

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  • Liquid crystal elastomer fiber capable of being spirally bent and preparation method and application thereof
  • Liquid crystal elastomer fiber capable of being spirally bent and preparation method and application thereof
  • Liquid crystal elastomer fiber capable of being spirally bent and preparation method and application thereof

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preparation example Construction

[0030] The preparation method of the heat-responsive liquid crystal elastomer fiber provided according to the embodiment of the present invention includes the following steps:

[0031] (1) Add liquid crystal monomers HCM008, HCM009 and photoinitiator IR819 into the sample bottle, put a stirring bar and add an appropriate amount of dichloromethane to dissolve, stir until the system is transparent, add 2,2'-(1,2- Ethylenediyldioxo) diethanethiol, pentaerythritol tetra-3-mercapto propionate and dipropylamine; the mass parts of the raw materials used above are: liquid crystal monomer (HCM008, HCM009) 72.5-81.5 parts, mercaptan ( 2,2′-(1,2-Ethylenedioxy)diethanethiol, pentaerythritol tetra-3-mercaptopropionate) 17.0-26.4 parts, catalyst (dipropylamine) 0.6-1.2 parts, photoinitiator (IR819) 0.05-0.3 parts; keep stirring under room temperature and yellow light conditions to make the system undergo Michael addition reaction until the solvent dichloromethane is completely volatilized, ...

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Abstract

The invention belongs to the technical field of liquid crystal materials, and discloses a liquid crystal elastomer fiber capable of being spirally bent and a preparation method and application thereof. The preparation method of the liquid crystal elastomer fiber comprises the following steps that (1), a liquid crystal monomer, mercaptan, a Michael addition reaction catalyst and a photoinitiator are dispersed in a volatile organic solvent for reaction, and continuously stirring is carried out until the volatile organic solvent is completely volatilized to prepare a liquid crystal elastomer prepolymer; and (2), the liquid crystal elastomer prepolymer is drawn into filaments, fixing is carried out after twisting, and polymerizing is carried out by ultraviolet irradiation to obtain the liquid crystal elastomer fiber. The liquid crystal elastomer fiber can realize three-dimensional spiral curling, overcomes the defect of single telescopic deformation of an existing liquid crystal elastomer material, and has the advantages of larger deformation range, thermal deformation and reversible recovery.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal materials, and in particular relates to a helically bendable liquid crystal elastomer fiber and a preparation method and application thereof. Background technique [0002] Liquid crystal elastomer is a new type of polymer material, which is obtained by moderate crosslinking of liquid crystal phase sequence (self-organization) and elastic high molecular weight. Under the stimulation of external field (electric field, temperature, light, etc.), liquid crystal elastomer can change the mesogen The arrangement of primitives produces changes in shape, and then shows changes in shape, soft elasticity, and optical properties. It is a very active field in the research of polymer materials. It shows a good application prospect. [0003] However, the shrinkage rate of traditional liquid crystal elastomer materials is low and the degree of deformation is limited, which limits the application of liquid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/76C08G75/045C09K19/38D01D5/12D02G1/02
CPCD01F6/76C08G75/045C09K19/3857D01D5/12D02G1/0286
Inventor 袁冬白龙飞游雨欣张悦赵威周国富
Owner SOUTH CHINA NORMAL UNIVERSITY
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