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Oxidized sodium alginate-polyacrylamide hydrogel and application thereof

A technology for oxidizing sodium alginate and polyacrylamide, which is applied in the direction of analyzing materials through chemical reactions, and analyzing materials through observation of the influence of chemical indicators. The acid-base indicator is inconvenient to form and fix, etc., to achieve the effect of simple fixation and forming process and high adhesion

Inactive Publication Date: 2021-07-23
LUDONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Adhesives with good adhesion performance are usually used to bond different substrates; ordinary acid-base indicators are not convenient to form and fix, so it is difficult to hide and reveal text and shapes

Method used

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  • Oxidized sodium alginate-polyacrylamide hydrogel and application thereof
  • Oxidized sodium alginate-polyacrylamide hydrogel and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In this embodiment, the oxidized sodium alginate-polyacrylamide hydrogel is used as an acid-base indicator, which specifically includes the following steps:

[0026] Soak the oxidized sodium alginate-polyacrylamide hydrogel in 0.01mol / L hydrochloric acid solution, the hydrogel appears yellowish white; then soak the oxidized sodium alginate-polyacrylamide hydrogel in 0.01mol / L In sodium hydroxide solution, the hydrogel appears dark yellow. It can be concluded that the oxidized sodium alginate-polyacrylamide hydrogel has the property of changing color in response to acid and alkali.

Embodiment 2

[0028] In this example, the oxidized sodium alginate-polyacrylamide hydrogel is coated on the surface of the substrate and dried to achieve fixation and molding, which specifically includes the following steps:

[0029] The oxidized sodium alginate-polyacrylamide hydrogel was coated on the surface of a glass plate with a butterfly mold, and dried and fixed. Add 0.1mol / L hydrochloric acid solution dropwise to the oxidized sodium alginate-polyacrylamide hydrogel, such as figure 1 As shown, the hydrogel is yellow-white. Choose white paper with a similar color as the substrate to hide the butterfly pattern; then add 0.1mol / L sodium hydroxide solution to the oxidized sodium alginate-polyacrylamide hydrogel dropwise, as shown in figure 2 As shown, the hydrogel is dark yellow, and the appearance of the butterfly pattern can be realized.

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Abstract

The invention discloses an oxidized sodium alginate-polyacrylamide hydrogel and an application of the oxidized sodium alginate-polyacrylamide hydrogel. The sodium alginate is oxidized by using ammonium persulfate as an oxidizing agent. The oxidized sodium alginate-polyacrylamide hydrogel can be fixed on the surfaces of different substrates through the adhesive force of the oxidized sodium alginate-polyacrylamide hydrogel, and different characters or shapes can be designed as required.

Description

technical field [0001] The invention belongs to the application expansion of the technical field of adhesives, and in particular relates to an oxidized sodium alginate-polyacrylamide hydrogel and its application. Background technique [0002] Adhesives with good adhesion performance are usually used to bond different substrates; ordinary acid-base indicators are not convenient to form and fix, so it is difficult to hide and reveal text and shapes. Contents of the invention [0003] In order to solve the above technical problems, the present invention provides an oxidized sodium alginate-polyacrylamide hydrogel and its application. The oxidized sodium alginate-polyacrylamide hydrogel can be fixed on the surface of the substrate through its adhesive force, and different characters and shapes can be designed as required, and the color of the hydrogel can be changed through the acid-base response, so as to realize the text and shape. hiding and revealing. [0004] In a first...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00C08F220/56G01N21/78
CPCC08F251/00G01N21/78
Inventor 曲柯宇赵晓涵周迅徐文龙
Owner LUDONG UNIVERSITY