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Stretchable, self-healing, stimuli-responsive biopolymer hydrogels

A biopolymer and stimuli-responsive technology, applied in the field of hydrogels, can solve the problems of hydrogels such as non-stretchability, high bonding strength, non-self-healing, etc., and achieve a fast and simple synthesis process

Active Publication Date: 2021-07-02
湖南省华京新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the as-prepared hydrogels are very fragile due to the high binding strength between the amine groups in the chitosan polymer chains and metal ions
Therefore, the hydrogel is neither stretchable nor self-healing

Method used

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  • Stretchable, self-healing, stimuli-responsive biopolymer hydrogels
  • Stretchable, self-healing, stimuli-responsive biopolymer hydrogels
  • Stretchable, self-healing, stimuli-responsive biopolymer hydrogels

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Embodiment Construction

[0027] In order to more fully explain the implementation of the present invention, the implementation examples of the present invention are provided, and these implementation examples are only illustrations of the present invention, and do not limit the scope of the present invention.

[0028] The hydrogel preparation method in the present application is very simple, can pass through the following steps:

[0029] A: Preparation of sodium hyaluronate aqueous solution: Take the preparation of hyaluronic acid aqueous solution with a concentration of 3wt% as an example: gradually add 3.00 grams of sodium hyaluronate powder to 97 ml of deionized water, and continue to stir for 8 hours until it is clear and viscous Shape, obtain sodium hyaluronate aqueous solution, put in 4 ℃ refrigerator for standby, the molecular weight of selected sodium hyaluronate is 1 million to 2 million;

[0030] B: metal ion solution configuration: a certain quality of metal chloride or metal nitrate is dis...

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Abstract

Stretchable, self-healing, stimuli-responsive biopolymer hydrogel, the hydrogel is obtained by mixing hyaluronic acid aqueous solution with metal ions under the condition of adjusting the pH value to 2-5.5, and the metal ion is Fe 3+ or Cu 2+ or Co 2+ or Ni 2+ or Zn 2+ or CD 2+ or Ag + , metal ions are added in the form of ionic salts, the concentration of the hyaluronic acid aqueous solution is 1wt%-4wt%, the molecular weight of sodium hyaluronate is 1-2 million, and the hydrogel is stretchable, Self-healing, stimulus-responsive properties. The hydrogel is based on natural biopolymers. The synthesis process of the hydrogel is very fast and simple, and it has a series of intrinsic functions of stretching, self-healing, and stimulus response.

Description

technical field [0001] The invention relates to a hydrogel, in particular to a biopolymer hydrogel, and belongs to the technical field of chemistry. Background technique [0002] Hydrogel is a chemical substance with a three-dimensional network structure containing water, which can be prepared from low molecular weight gelling agents, biopolymers or synthetic polymers. Up to now, scientists have designed and synthesized hydrogels with various functions, such as stretchable hydrogels, self-healing hydrogels, stimuli-responsive hydrogels, photopatterned hydrogels, and so on. However, few hydrogels are simultaneously stretchable, self-healing, stimuli-responsive, and photopatternable. Some biological tissues (such as skin) are biopolymer-based hydrogels, which exhibit good ductility, rapid self-healing ability, and multiple stimuli responses to pH, temperature, ions, and even light. Low-molecular-weight gels have good stimuli-responsive and thixotropic properties, however, su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/075C08L5/08C08K3/16C08K3/28
CPCC08J3/075C08J2305/08C08K3/16C08K3/28
Inventor 刘林孙志方夏宁
Owner 湖南省华京新材料有限公司