Liquid crystal gel with luminescence and photoresponse characteristics, and preparation method and application

A light-responsive, light-responsive technology, applied in chemical instruments and methods, luminescent materials, liquid crystal materials, etc., to achieve the effects of good self-supporting performance, strong practicability and high modulus

Pending Publication Date: 2021-11-26
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, almost all of the light-responsive liquid crystal gel materials reported so far use azobenzene as the light-responsive unit, and there are still some problems in the light emission, stability and mechanical properties of the liquid crystal gel materials containing azobenzene.

Method used

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  • Liquid crystal gel with luminescence and photoresponse characteristics, and preparation method and application
  • Liquid crystal gel with luminescence and photoresponse characteristics, and preparation method and application
  • Liquid crystal gel with luminescence and photoresponse characteristics, and preparation method and application

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preparation example Construction

[0044] The preparation method of the liquid crystal gel with luminescent and photoresponsive properties of the present invention comprises the following steps:

[0045] (1) Mix the photoresponsive luminescent liquid crystal, nematic liquid crystal and gel factor by ultrasonic, the power of ultrasonic dispersion is 100-400 watts, and the ultrasonic time is 1-2 hours, so that the gel factor is evenly dispersed in the liquid crystal , the gel factor accounts for 0.5-11.5 parts by weight, the photoresponsive luminescent liquid crystal accounts for 1.0-12.0 parts by weight, and the nematic liquid crystal accounts for 76.5-98.5 parts by weight;

[0046] (2) Heat the mixture in step (1) at a temperature of 80-200 degrees Celsius until a transparent solution is formed, and then naturally cool to room temperature, and the photoresponsive luminescent liquid crystal and nematic liquid crystal are uniformly dispersed in the three-dimensional liquid crystal formed by the gel factor In the ...

Embodiment 1

[0051] 1.0wt% CS(R 1 for hydrogen, R 2 for hydrogen, R 3 For p-tetraethylene glycol phenyl, R 4 is hydrogen), 0.5wt% of 1,4-terephthalamide amphetamine derivatives (R 1 with R 3 Same as A, R 2 with R 4 The same is C) and 98.5wt% nematic liquid crystal (cholesteryl benzoate), mixed uniformly by ultrasonic, heated to a transparent solution state, and naturally cooled to room temperature to obtain a photoresponsive with high modulus liquid crystal gel. After irradiating for 10 minutes under a UV lamp at 365 nanometers with a light intensity of 10 mW / cm2, the fluorescence of the gel changed, showing photoresponsiveness.

Embodiment 2

[0053] 5.0wt% TPAH (R 1 is cyano, R 2 is n-hexadecyloxy), 0.7wt% of naphthalimide derivatives (R 1 for A, R 7 Propyl) and 94.3wt% nematic liquid crystal (4-n-pentyl-4'-cyanobiphenyl) are mixed homogeneously by ultrasound, heated to a transparent solution state, and naturally cooled to room temperature to obtain a liquid crystal with high modulus amount of photoresponsive liquid crystal gel. After irradiating for 10 minutes under a UV lamp at 365 nm with a light intensity of 20 mW / cm2, the fluorescence of the gel changed, showing photoresponsiveness.

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Abstract

The invention discloses a liquid crystal gel with luminescence and photoresponse characteristics. The liquid crystal gel comprises the following components in parts by weight: 0.5-11.5 parts of gelator, 1.0-12.0 parts of photoresponse luminescence liquid crystal and 76.5-98.5 parts of nematic phase liquid crystal, the gelator is self-assembled to form a three-dimensional network through hydrogen-bond interaction and pi-pi interaction, the photoresponse luminescence liquid crystal and the nematic phase liquid crystal are uniformly dispersed in a spatial network, energy transfer exists between the two, and the gelator is endowed with dark blue luminescence. Under the irradiation of ultraviolet light, the photoresponse luminescence liquid crystal is isomerized, energy transfer disappears, the luminescence color and intensity of the gel are changed, and photoresponse is achieved. The liquid crystal gel provided by the invention is simple in preparation method, good in stability, high in modulus, capable of storing luminous images and wide in application prospect in the fields of flexible display, information storage and the like.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to a liquid crystal gel with luminous and photoresponsive properties, a preparation method and application thereof. Background technique [0002] Luminescent liquid crystals combine photoresponsive elements with liquid crystal elements, which not only exhibit the anisotropy and fluidity of liquid crystals, but also exhibit excellent luminescent properties, and are widely used in the fields of display, optics, and electro-optical devices. The gelation of stimuli-responsive luminescent liquid crystals can not only obtain new materials with good mechanical self-support, but also retain the excellent stimuli-responsive ability and luminescent performance of luminescent liquid crystals, which is expected to promote the development of liquid crystal flexible displays, optics, electro-optic devices and other fields. develop. [0003] Currently, liquid crystal gels...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/44C09K19/50C09K19/52C09K11/06C09K9/02
CPCC09K19/44C09K19/50C09K19/52C09K11/06C09K9/02C09K2019/526C09K2211/1033C09K2211/1007C09K2211/1011
Inventor 彭海炎胡娜解孝林周兴平
Owner HUAZHONG UNIV OF SCI & TECH
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