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Multi-responsive color-changing hydrogel as well as preparation method and application thereof

A hydrogel and responsive technology, which is applied in the fields of multiple responsive color-changing hydrogels and their preparation and use, can solve the problems of single detection method of divalent metal ions and insufficient information confidentiality, and achieve wide sources and good color change. Performance, simple operation effect

Pending Publication Date: 2022-02-11
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem of insufficient confidentiality of information in storage and the single detection method of divalent metal ions in solution, so as to achieve the purpose of multi-faceted application of hydrogel, and provide a multi-responsive color-changing hydrogel and its preparation method and use

Method used

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  • Multi-responsive color-changing hydrogel as well as preparation method and application thereof
  • Multi-responsive color-changing hydrogel as well as preparation method and application thereof
  • Multi-responsive color-changing hydrogel as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A multi-responsive color-changing hydrogel and its preparation method and use include the following steps:

[0030] 1. Dissolve polyvinyl alcohol and sodium alginate in a potassium dihydrogen phosphate-sodium dihydrogen phosphate buffer solution of malachite green at pH=8.0-10 at 90°C, wherein the mass fraction of polyvinyl alcohol is 20%, The mass fraction of sodium alginate is 2%, and the mass fraction of malachite green is 0.4%;

[0031] 2. Drop a certain amount of sodium hydroxide solution into the above solution until the solution is white;

[0032] 3. Pour the white solution into a glass mold, freeze at minus 20° C. for 3-5 hours, take it out and thaw it to room temperature, and repeat 2-3 times to obtain the multi-responsive color-changing hydrogel.

[0033] Example 1 prepared polyvinyl alcohol / sodium alginate / malachite green hydrogel by a one-pot freeze-thaw cycle method. The preparation method is simple, the cost is low, the size of the material is controllab...

Embodiment 2

[0039] A multi-responsive color-changing hydrogel and its preparation method and use include the following steps:

[0040] 1. Dissolve polyvinyl alcohol and sodium alginate in a potassium dihydrogen phosphate-sodium dihydrogen phosphate buffer solution of malachite green at pH=8.0-10 at 90° C., wherein the mass fraction of polyvinyl alcohol is 10%, The mass fraction of sodium alginate is 2%, and the mass fraction of malachite green is 0.4%;

[0041] 2. Drop a certain amount of sodium hydroxide solution into the above solution until the solution is white;

[0042] 3. Pour the white solution into a glass mold, freeze at minus 20° C. for 3-5 hours, take it out and thaw it to room temperature, and repeat 2-3 times to obtain the multi-responsive color-changing hydrogel.

Embodiment 3

[0044] A multi-responsive color-changing hydrogel and its preparation method and use include the following steps:

[0045] 1. Dissolve polyvinyl alcohol and sodium alginate in a potassium dihydrogen phosphate-sodium dihydrogen phosphate buffer solution of malachite green at pH=8.0-10 at 90° C., wherein the mass fraction of polyvinyl alcohol is 15%, The mass fraction of sodium alginate is 2%, and the mass fraction of malachite green is 0.4%;

[0046] 2. Drop a certain amount of sodium hydroxide solution into the above solution until the solution is white;

[0047]3. Pour the white solution into a glass mold, freeze at minus 20°C for 3-5 hours, take it out and thaw it to room temperature, and repeat 2-3 times to obtain the multi-responsive color-changing hydrogel.

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Abstract

The invention discloses multi-responsive color-changing hydrogel as well as a preparation method and application thereof, and relates to preparation of responsive hydrogel. Malachite green hydrogel is prepared by using a freeze-thaw cycle method, and is dissolved into a mixed phosphate buffer solution, the solution is stirred to form a colorless solution, polyvinyl alcohol and sodium alginate are added into the colorless solution, and stirred until the polyvinyl alcohol and sodium alginate are completely dissolved to obtain a blue precursor solution, a sodium hydroxide solution is dropwise added into the blue precursor solution until the precursor solution is white, the hydrogel precursor solution is injected into a glass mold, and hydrogel with secret information and pH value test is prepared by a freeze-thaw cycle method. The malachite green hydrogel prepared by the invention can be used for information recording, storage and metal ion detection.

Description

technical field [0001] The invention relates to a multi-responsive color-changing hydrogel and its preparation method and application. Background technique [0002] Hydrogel is a kind of polymer with a three-dimensional network structure containing hydrophilic groups that can swell in water but not dissolve. It is a special kind of soft and wet functional material. Smart hydrogel refers to the A type of hydrogel that changes in properties corresponding to slight changes (temperature, pH value, electric field strength, solvent type, light frequency, light wavelength, pressure, ionic strength, etc.). [0003] Photoresponsive hydrogel is one of the intelligent responsive hydrogels. Because of its wide range of biomedical applications, excellent properties such as drug delivery, gene delivery, tissue regeneration and other potential applications have attracted the interest of many scientific and technological workers. . The photoresponsive hydrogel changes its properties (such...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08L29/04C08L5/04C08K5/29
CPCC08J3/075C08J2329/04C08J2405/04C08K5/29
Inventor 郭佩佩宋博文
Owner CHANGCHUN UNIV OF TECH
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