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Fluorescence-responsive self-healing hydrogel and preparation method thereof

A fluorescent response and self-healing technology, applied in the field of hydrogel preparation and self-healing hydrogel preparation, to achieve the effect of convenient large-scale production, good self-healing property and simple preparation method

Active Publication Date: 2019-03-08
GENERAL HOSPITAL OF PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the precious nature of lanthanides and the difficulty in large-scale synthesis of organic chromophores, these methods are not optimal for the production of new self-healing fluorescent coloring materials

Method used

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  • Fluorescence-responsive self-healing hydrogel and preparation method thereof
  • Fluorescence-responsive self-healing hydrogel and preparation method thereof
  • Fluorescence-responsive self-healing hydrogel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] This embodiment provides a fluorescence-responsive self-healing hydrogel, which is prepared through the following steps:

[0037] After heating to 98°C in a silicone oil bath, dissolve 10g of polyvinyl alcohol, 0.5g of chitosan, and 0.5g of lipopolysaccharide in 40g of deionized water to form a sol with a mass concentration of polyvinyl alcohol of about 20%, and heat at a constant temperature for 2 hours;

[0038] Add 50mL of sodium tetraborate solution with a concentration of 0.04mol / L and 10mL of glycerol solution to the sol, continue heating at a constant temperature to obtain a gel, heat in an oil bath at 90°C for 1 hour;

[0039] Take out the gel, inject 2L of blue fluorescent quantum dots into the gel, and press it with a 2kg weight at room temperature for 4 hours to obtain a self-healing hydrogel with fluorescent response.

Embodiment 2

[0041] This embodiment provides a fluorescence-responsive self-healing hydrogel, which is prepared through the following steps:

[0042] After heating to 98°C in a silicone oil bath, dissolve 10g of polyvinyl alcohol, 0.5g of chitosan, and 0.5g of lipopolysaccharide in 40g of deionized water to form a sol with a mass concentration of polyvinyl alcohol of about 20%, and heat at a constant temperature for 2 hours;

[0043] Add 50mL of sodium tetraborate solution with a concentration of 0.04mol / L and 10mL of glycerol solution to the sol, continue heating at a constant temperature to obtain a gel, heat in an oil bath at 90°C for 1 hour;

[0044] Take out the gel, inject 2mL of red fluorescent quantum dots into the gel, and press it with a 2kg weight at room temperature for 4 hours to obtain a fluorescence-responsive self-healing hydrogel.

Embodiment 3

[0046] This embodiment provides a fluorescence-responsive self-healing hydrogel, which is prepared through the following steps:

[0047] After heating to 98°C in a silicone oil bath, dissolve 10g of polyvinyl alcohol, 0.5g of chitosan, and 0.5g of lipopolysaccharide in 40g of deionized water to form a sol with a mass concentration of polyvinyl alcohol of about 20%, and heat at a constant temperature for 2 hours;

[0048] Add 50mL of sodium tetraborate solution with a concentration of 0.04mol / L and 10mL of glycerol solution to the sol, and continue heating at a constant temperature in an oil bath at 90°C for 1 hour;

[0049] The gel was taken out, 2 mL of green fluorescent quantum dots were injected into the gel, and pressed with a 2 kg weight at room temperature for 4 hours to obtain a fluorescently responsive self-healing hydrogel.

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Abstract

The invention provides fluorescence-responsive self-healing hydrogel and a preparation method thereof. The preparation method includes steps: dissolving polyvinyl alcohol, chitosan and lipopolysaccharide into water at 90-100DEG C to obtain sol, and heating for 1.5h-4h, wherein the mass concentration of polyvinyl alcohol in the sol is 20%-40%; adding a micromolecular compound into the sol to obtaingel, and performing constant-temperature heating at 80-90 DEG C for 1h-2h; adding carbon quantum dot water solution into the gel, and cooling and pressing to obtain the fluorescence-responsive self-healing hydrogel. The fluorescence-responsive self-healing hydrogel has fluorescence responsiveness and great self-healing performance.

Description

technical field [0001] The invention relates to a method for preparing a hydrogel, in particular to a method for preparing a self-healing hydrogel with fluorescence response, and belongs to the technical field of gel material preparation. Background technique [0002] Hydrogels have some self-healing ability, however, it is still challenging to prepare ultrafast self-healing hydrogels (without external stimuli) that can be applied in humid environments and underwater using existing methods. [0003] The main preparation method of optical polymer materials is the use of organic chromophores or luminescent lanthanide metals (such as Eu and Tb) that can form dynamic coordination with polymers. However, these methods are not optimal for producing new self-healing fluorescent coloring materials due to the precious nature of lanthanides and the difficulty in large-scale synthesis of organic chromophores. Contents of the invention [0004] In order to solve the above-mentioned t...

Claims

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Application Information

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IPC IPC(8): C08J3/075C08L29/04C08L5/08C08L5/12C08K3/38C08K5/053
CPCC08J3/075C08J2329/04C08J2405/08C08J2405/12C08K5/053C08K2003/387
Inventor 许猛徐泉田煜李明李维军张晓洁杨晨
Owner GENERAL HOSPITAL OF PLA
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