Photoresponsive polymer gel factor, photoresponsive gel and preparation method of photoresponsive gel

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

Active Publication Date: 2020-01-24
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

Method used

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  • Photoresponsive polymer gel factor, photoresponsive gel and preparation method of photoresponsive gel
  • Photoresponsive polymer gel factor, photoresponsive gel and preparation method of photoresponsive gel
  • Photoresponsive polymer gel factor, photoresponsive gel and preparation method of photoresponsive gel

Examples

Experimental program
Comparison scheme
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 photoresponsive polymer gel factor, a photoresponsive gel and a preparation method of the photoresponsive gel. The photoresponsive polymer gel factor comprises a plurality ofphotoresponsive liquid crystal repeat units, wherein each photoresponsive liquid crystal repeat unit comprises azobenzene and derivative groups thereof, flexible chains and connecting groups. As theazobenzene and the derivative groups thereof are introduced into the main chain of a liquid crystal polymer gel factor, a three-dimensional network is formed through long alkyl chain accumulation, hydrogen bonding of the connecting groups and interactions of pi-pi, and the formed polymer gel has the characteristic of dual photothermal response; and the problems that a conventional azobenzene photoresponsive gel is slow in response speed and poor in mechanical property can be effectively solved, and in addition, 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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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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