Quadruple shape memory hydrogel and preparation method thereof

A hydrogel and memory technology, applied in the field of quadruple shape memory hydrogel and its preparation, quadruple shape memory chitosan hydrogel and its preparation, can solve the problems of lack of industrial application prospects, insufficient mechanical properties, response Long time and other problems, to achieve the effect of fast response time, fast deformation recovery time, and wide application range

Inactive Publication Date: 2018-10-12
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned triple shape memory gel still has some defects, so it does not have industrial application prospects, such as long response time, insufficient mechanical properties, etc., and it can only achieve triple shape memory.

Method used

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  • Quadruple shape memory hydrogel and preparation method thereof
  • Quadruple shape memory hydrogel and preparation method thereof
  • Quadruple shape memory hydrogel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] In this example, a quadruple shape memory hydrogel was prepared according to the following steps:

[0067] (1) Dissolve 2 parts of chitosan in 100 parts of acetic acid solution with a mass fraction of 1%, and stir for at least 12 hours to obtain a chitosan mixed solution.

[0068] (2) Take 5 parts of deionized water, add 5 parts of acrylic acid, 0.8 parts of ammonium persulfate, 0.02 parts of N,N'-methylenebisacrylamide, and 15 parts of chitosan obtained in step (1) under stirring conditions. Mix the sugar solution and continue to stir and mix for half a minute to obtain a uniform suspension.

[0069] (3) Pour the suspension obtained in step (2) into a petri dish and seal it, then put the petri dish into a desiccator at 60° C., and react for 1 hour to obtain a quadruple shape memory hydrogel.

[0070] It has been determined that the hydrogel has a quadruple shape memory function, and in 3mol / L FeCl 3 In the solution, the maximum deformation rate can reach 100%, and th...

Embodiment 2

[0072] In this example, a quadruple shape memory hydrogel was prepared according to the following steps:

[0073] (1) Dissolve 2 parts of chitosan in 100 parts of acetic acid solution with a mass fraction of 1%, and stir for at least 12 hours to obtain a chitosan mixed solution.

[0074] (2) Take 5 parts of deionized water, add 5 parts of acrylic acid, 0.4 parts of ammonium persulfate, 0.02 parts of N,N'-methylenebisacrylamide, and 15 parts of chitosan obtained in step (1) under stirring conditions. Mix the sugar solution and continue to stir and mix for half a minute to obtain a uniform suspension.

[0075] (3) Pour the suspension obtained in step (2) into a petri dish and seal it, then put the petri dish into a desiccator at 60° C., and react for 1 hour to obtain a quadruple shape memory hydrogel.

[0076] It has been determined that the hydrogel has a quadruple shape memory function, and in 3mol / L FeCl 3 In the solution, the maximum deformation rate can reach 100%, and th...

Embodiment 3

[0078] In this example, a quadruple shape memory hydrogel was prepared according to the following steps:

[0079] (1) Dissolve 2 parts of chitosan in 100 parts of acetic acid solution with a mass fraction of 1%, and stir for at least 12 hours to obtain a chitosan mixed solution.

[0080] (2) Take 5 parts of deionized water, add 5 parts of acrylic acid, 0.4 parts of ammonium persulfate, 0.01 parts of N,N'-methylenebisacrylamide, and 15 parts of chitosan obtained in step (1) under stirring conditions. Mix the sugar solution and continue to stir and mix for half a minute to obtain a uniform suspension.

[0081] (3) Pour the suspension obtained in step (2) into a petri dish and seal it, then put the petri dish into a desiccator at 60° C., and react for 1 hour to obtain a quadruple shape memory hydrogel.

[0082] It has been determined that the hydrogel has a quadruple shape memory function, and in 3mol / L FeCl 3 In the solution, the maximum deformation rate can reach 100%, and th...

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Abstract

The invention provides quadruple shape memory hydrogel and a preparation method thereof. The quadruple shape memory hydrogel is composed of a polyacrylic acid polymer network structure and dispersed chitosan molecules coated by the polymer network structure. The quadruple shape memory hydrogel is prepared from a suspension comprising, by mass, 5 to 25 parts of a chitosan mixed solution, 5 to 20 parts of deionized water, 3 to 15 parts of acrylic acid, 0.1 to 1 part of an initiator and 0.01 to 0.1 parts of a crosslinking agent. The quadruple shape memory hydrogel has good physical properties, high-speed shape memory and shape recovery. The preparation method has simple processes and controllable reaction time.

Description

technical field [0001] The invention belongs to the technical field of hydrogels, and relates to a quadruple shape memory hydrogel and a preparation method thereof, in particular to quadruple shapes respectively having responsiveness to sodium chloride solution, responsiveness to sodium hydroxide solution, and responsiveness to metal ions Memory chitosan hydrogel and its preparation method. Background technique [0002] Hydrogel is a high molecular polymer material with water as the dispersion medium, which is hydrophilic but insoluble in water and can absorb a large amount of water and has a cross-linked structure. Shape memory hydrogels are a class of smart, soft, and wet materials that possess shape memory and return to their original shape in response to external stimuli. As an emerging material, shape memory hydrogel has broad development prospects. It has the characteristics of high deformation, light weight, relatively low cost and easy processing. All fields have g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00C08F220/06
CPCC08F251/00C08F220/06
Inventor 王茹李信徐双凤王亚玲胡再银
Owner SICHUAN UNIV
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