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Photoresponsive polymer gelling factor, photoresponsive gel and preparation method thereof

A gel factor and photoresponse technology, applied in the field of supramolecular materials, can solve problems such as slow response speed, poor mechanical properties, and complicated preparation methods, and achieve the effect of enhanced mechanical properties, excellent mechanical properties, and simple preparation methods

Active Publication Date: 2021-04-30
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at at least one defect or improvement requirement of the prior art, the present invention provides a light-responsive polymer gel factor, a light-responsive gel and a preparation method thereof, the purpose of which is to solve the problems existing in the existing azobenzene light-responsive gel Problems of slow response, poor mechanical properties, and complex preparation methods

Method used

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  • Photoresponsive polymer gelling factor, photoresponsive gel and preparation method thereof
  • Photoresponsive polymer gelling factor, photoresponsive gel and preparation method thereof
  • Photoresponsive polymer gelling factor, photoresponsive gel and preparation method thereof

Examples

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Effect test

Embodiment 1

[0052] A photoresponsive gel provided in this embodiment includes 10wt% photoresponsive polymer gelling factor and 90wt% acetonitrile, wherein the structure of the photoresponsive polymer gelling factor is:

[0053]

[0054] In the structure of photoresponsive polymer gelling factor is a flexible chain; For linking group; n is 25.

[0055] The above photoresponsive gel has fast and reversible dual response characteristics to light and heat. The photoresponsive gel becomes a clear solution after being heated at 90°C for 5 minutes, and the solution is cooled to room temperature to form a gel again; the photoresponsive gel is used for Green light irradiation for 10 minutes turned into a clear solution, and the solution re-formed a gel after blue light irradiation for 10 minutes. The saturation storage modulus of the photoresponsive gel measured by rotational rheometer is 2.1×10 5 Pa, the photoisomerization rate of azobenzene is 0.030s -1 . This photoresponsive gel can b...

Embodiment 2

[0063] A photoresponsive gel provided in this embodiment includes 7wt% photoresponsive polymer gelling factor and 93wt% tetrahydrofuran, wherein the structure of the photoresponsive polymer gelling factor is:

[0064]

[0065] In the structure of photoresponsive polymer gelling factor is a flexible chain; For linking group; n is 40.

[0066] The photoresponsive gel has fast and reversible dual response characteristics to light and heat; the photoresponsive gel turns into a clear solution after being heated at 90°C for 5 minutes, and the solution is cooled to room temperature to form a gel again. The photoresponsive gel turned into a clear solution after being irradiated with ultraviolet light for 10 minutes, and the solution re-formed into a gel after 10 minutes of being irradiated with visible light.

[0067] The preparation method of this photoresponsive gel is as follows:

[0068] (1) Under ice-bath conditions, add 10 grams (90 mmol) of p-aminophenol to 100 millilit...

Embodiment 3

[0074]A photoresponsive gel provided in this embodiment includes 6.5wt% photoresponsive polymer gelling factor and 93.5wt% dioxane, wherein the structure of the photoresponsive polymer gelling factor is:

[0075]

[0076] In the structure of photoresponsive polymer gelling factor is a flexible chain; For linking group; n is 26.

[0077] The photoresponsive gel has fast and reversible dual response characteristics to light and heat: the photoresponsive gel turns into a clear solution after being heated at 90°C for 5 minutes, and the solution is cooled to room temperature to form a gel again;

[0078] figure 1 The photoresponsive polymer gelling factor solution prepared for this embodiment is irradiated with ultraviolet light for different time UV-visible absorption spectra; from figure 1 It can be seen that the absorbance of the solution gradually decreases with the increase of the ultraviolet light irradiation time; the photoresponsive gel becomes a clear solution afte...

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Abstract

The invention discloses a light-responsive polymer gel factor, a light-responsive gel and a preparation method thereof. The light-responsive polymer gel factor includes several light-responsive liquid crystal repeating units, and each light-responsive liquid crystal repeating unit contains azobenzene and its derivative groups, flexible chains and linking groups; the present invention introduces azobenzene and its derivative groups into the main chain of liquid crystal polymer gelatin, through the accumulation of long alkyl chains, the hydrogen of linking groups The bond interaction and the π-π interaction of the benzene ring self-assemble to form a three-dimensional network, and the formed polymer gel has the characteristics of photothermal dual response; effectively solve the existing azobenzene photoresponsive gel. The problem of poor performance, and the preparation method is simple.

Description

technical field [0001] The invention belongs to the technical field of supramolecular materials, and more specifically relates to a photoresponsive polymer gel factor, a photoresponsive gel and a preparation method thereof. Background technique [0002] Stimuli-responsive supramolecular gels are smart materials that can change properties in response to external light, heat and other stimuli. Among them, photostimulation has attracted extensive attention due to its non-contact and precise spatiotemporal control. Photoresponsive gels have great application prospects in drug controlled release, molecular motors and shape memory materials. [0003] Common supramolecular gels often undergo simple uniform deformation under external stimuli, while oriented gels can undergo non-uniform deformation under external stimuli due to their anisotropic structure, which can be applied to artificial intelligence soft material drives. Liquid crystal polymers have good structural anisotropy, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/685C08G63/83C08G63/85C08G63/86C08J3/09C08L67/02
CPCC08G63/6856C08G63/83C08G63/85C08G63/866C08J3/09C08J2367/02
Inventor 廖永贵王晶解孝林周兴平
Owner HUAZHONG UNIV OF SCI & TECH
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