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Self-repairing conductive double network structure hydrogel and preparation method thereof

A network structure and hydrogel technology, applied in medical science, prosthesis, tissue regeneration, etc., can solve the problems of self-healing double network structure hydrogel, etc., and achieve rapid self-healing and excellent electrical conductivity , the effect of increasing strength

Inactive Publication Date: 2018-08-24
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, there is no report on the preparation of self-healing double network structure hydrogels using carbon nanotubes as the conductive network

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1 A method for preparing a self-healing conductive double network structure hydrogel, the steps and conditions are as follows:

[0019] (1) Preparation of the first network of pre-crosslinked carbon nanotubes-chitosan

[0020] (a) The chitosan of 2g is added in the acetic acid solution of 200mL 2%, magnetic stirring is until forming clear solution, promptly forms the chitosan solution that solid content is 1%, preserves for subsequent use;

[0021] (b) Take the carboxylated multi-walled carbon nanotubes and add them to the chitosan solution obtained in (a), and disperse them ultrasonically for 15 minutes, and the ultrasonic power is 1200W. The obtained carbon nanotube-chitosan solution was magnetically stirred at room temperature for 4 h. After the reaction, centrifuge the mixed solution at 10000r / min for 30min, discard the supernatant, add 1% acetic acid solution and ultrasonically treat the precipitate to disperse evenly, then continue to centrifuge at 10000r...

Embodiment 2

[0033] Example 2 A method for preparing a self-healing conductive double network structure hydrogel, the steps and conditions are as follows:

[0034] (1) Preparation of the first network of pre-crosslinked carbon nanotubes-chitosan

[0035] (a) The chitosan of 2g is added in the acetic acid solution of 200mL 2%, magnetic stirring is until forming clear solution, promptly forms the chitosan solution that solid content is 1%, preserves for subsequent use;

[0036] (b) Take the carboxylated multi-walled carbon nanotubes and add them to the chitosan solution obtained in (a), and disperse them ultrasonically for 15 minutes, and the ultrasonic power is 1200W. The obtained carbon nanotube-chitosan solution was magnetically stirred at room temperature for 4 h. After the reaction, centrifuge the mixed solution at 10000r / min for 30min, discard the supernatant, add 1% acetic acid solution and ultrasonically treat the precipitate to disperse evenly, then continue to centrifuge at 10000r...

Embodiment 3

[0046] Example 3 A method for preparing a self-healing conductive double network structure hydrogel, the steps and conditions are as follows:

[0047] (1) Preparation of the first network of pre-crosslinked carbon nanotubes-chitosan

[0048] (a) The chitosan of 2g is added in the acetic acid solution of 200mL 2%, magnetic stirring is until forming clear solution, promptly forms the chitosan solution that solid content is 1%, preserves for subsequent use;

[0049] (b) Take the carboxylated multi-walled carbon nanotubes and add them to the chitosan solution obtained in (a), and disperse them ultrasonically for 15 minutes, and the ultrasonic power is 1200W. The obtained carbon nanotube-chitosan solution was magnetically stirred at room temperature for 4 h. After the reaction, centrifuge the mixed solution at 10000r / min for 30min, discard the supernatant, add 1% acetic acid solution and ultrasonically treat the precipitate to disperse evenly, then continue to centrifuge at 10000r...

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Abstract

The invention provides a preparation method of a self-repairing conductive double network structure hydrogel. The hydrogel is a carbon nanotube / chitosan double network structure hydrogel, a first network is formed by electrostatic interaction of carboxylated carbon nanotubes and chitosan, and a second network is a hydrophobic association network hydrogel obtained by free radical polymerization ofmain monomer acrylamide or N-isopropyl acrylamide and hydrophobic monomer octyl methacrylate, dodecyl methacrylate, hexadecyl methacrylate or long-chain aliphatic acrylate. The introduction of the carbon nanotubes provides excellent conductivity for the hydrogel, and the hydrophobic monomer can stably form a hydrophobic association center in an emulsifier, and has an obvious reinforcing effect onthe hydrogel, and the obtained hydrogel ahs significantly-improved strength. In addition, the presence of ionic and hydrophobic association effects provides a rapid self-healing property for the hydrogel, and the hydrogel is useful in bionic biology, flexible electronics, biosensors and other fields.

Description

technical field [0001] The invention relates to a preparation method of a self-repairing conductive double network structure hydrogel, which belongs to the technical field of synthetic hydrogels, and in particular to a preparation method of a carbon nanotube-based self-repairing conductive hydrogel. Background technique [0002] Hydrogels have many similarities with biological soft tissues, so they have broad application prospects in life sciences, food sciences, drug controlled release, biosensors, and tissue engineering. However, the mechanical properties of traditional hydrogels are poor, and microscopic cracks will be damaged by external extrusion or liquid erosion during use, and these microscopic cracks will gradually expand and propagate to destroy the integrity of the hydrogel, and this damage is usually It is irreversible and difficult to be repaired, which severely limits its practical application. Therefore, self-healing hydrogels, which can self-repair their own...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08J3/24C08L33/26C08L5/08C08K3/04C08F220/56C08F220/18A61L27/20A61L27/16A61L27/08A61L27/50A61L27/52
CPCA61L27/08A61L27/16A61L27/20A61L27/50A61L27/52A61L2430/06C08F220/56C08J3/075C08J3/24C08J2305/08C08J2333/26C08J2405/08C08J2433/26C08K3/041C08L5/08C08L33/26C08F220/1808
Inventor 高光辉夏珊宋士新
Owner CHANGCHUN UNIV OF TECH
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