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A preparation method of a hydrogel electrode with high mechanical properties and self-healing properties

A hydrogel, self-healing technology, applied in medical science, sensors, diagnosis, etc., can solve the problems of lack of interaction between molecular chains, hydrogels do not have dynamic characteristics, and it is difficult to achieve self-healing, etc., to achieve widening Practical application range, excellent electrical conductivity, and the effect of improving mechanical properties

Inactive Publication Date: 2018-08-17
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary hydrogels are soft and brittle, and lack the interaction between molecular chains in the structure. If there is no ingenious structural design, the cross-linked structure of the hydrogel does not have dynamic characteristics, and the system still lacks a mobile phase, making it difficult to achieve self-healing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A method for preparing a hydrogel electrode with high mechanical properties and self-healing properties, comprising the following steps:

[0018] Disperse 0.26g of carbon nanotubes in 10ml of a dopamine solution with a concentration of 2mg / ml, adjust the pH of the above solution between 8 and 14, stir and react at room temperature for 20 minutes, so that dopamine self-polymerizes to form polydopamine, and Evenly wrapped on the surface of the conductive nanomaterial to obtain a polydopamine-modified conductive nanomaterial; add 2.6g of acrylamide as a monomer to the polydopamine-modified conductive nanomaterial solution and mix evenly, then add 0.2g persulfuric acid Ammonium (APS) as the initiator, 0.15g N,N-methylenebisacrylamide (BIS) as the cross-linking agent and 10uL tetramethylethylenediamine (TMEDA) as the auxiliary agent, fully stirred and mixed evenly, initiated by free radicals Polymerization produces the hydrogel electrode.

Embodiment 2

[0020] A method for preparing a hydrogel electrode with high mechanical properties and self-healing properties, comprising the following steps:

[0021] Disperse 0.26g of carbon nanotubes in 10ml of a dopamine solution with a concentration of 2mg / ml, adjust the pH of the above solution between 8 and 14, stir and react at room temperature for 20 minutes, so that dopamine self-polymerizes to form polydopamine, and Evenly wrapped on the surface of the conductive nanomaterial to obtain a polydopamine-modified conductive nanomaterial; add 2.6g of acrylic acid as a monomer to the polydopamine-modified conductive nanomaterial solution and mix evenly, then add 0.15g of ammonium persulfate (APS) as the initiator, 0.20g N, N-methylenebisacrylamide (BIS) as the crosslinking agent and 20uL tetramethylethylenediamine (TMEDA) as the auxiliary agent, fully stirred and mixed, and initiated by free radicals Polymerization produces the hydrogel electrode.

Embodiment 3

[0023] A method for preparing a hydrogel electrode with high mechanical properties and self-healing properties, comprising the following steps:

[0024] Disperse 0.26g of carbon nanotubes in 10ml of a dopamine solution with a concentration of 2mg / ml, adjust the pH of the above solution between 8 and 14, stir and react at room temperature for 20 minutes, so that dopamine self-polymerizes to form polydopamine, and Evenly wrapped on the surface of the conductive nanomaterial to obtain a polydopamine-modified conductive nanomaterial; add 1.3g of N-isopropylacrylamide as a monomer into the polydopamine-modified conductive nanomaterial solution and mix evenly, and then Add 0.15g ammonium persulfate (APS) as initiator, 0.125g N, N-methylenebisacrylamide (BIS) as crosslinking agent and 15uL tetramethylethylenediamine (TMEDA) as auxiliary agent, stir and mix well Uniformly, the hydrogel electrode was prepared by free radical induced polymerization.

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Abstract

The invention discloses a preparation method of a hydrogel electrode with high mechanical properties and self-healing property, belonging to the technical field of biomaterials. In the present invention, polydopamine-modified conductive nanomaterials are firstly prepared in a solution, and then water-soluble monomers are added to the solution, and then an initiator, a cross-linking agent and an auxiliary agent are added to mix evenly, and the hydrogel is formed by free radical polymerization. electrode. The hydrogel electrode prepared by the invention does not have good electrical conductivity and mechanical properties; and due to the non-covalent bond between polydopamine chains, the hydrogel electrode has good self-healing performance. The hydrogel electrode prepared by the invention has the ability to heal spontaneously in a short period of time after accidental damage; combined with its good biocompatibility, the self-healing hydrogel electrode prepared by the invention It is expected to be applied to modern clinical detection and biomedical measurement.

Description

technical field [0001] The invention belongs to the technical field of biomaterial preparation, and in particular relates to a method for preparing a hydrogel electrode with high mechanical properties and self-healing properties. Background technique [0002] With the integration of electronic information technology and biotechnology, new material technology, micro-electromechanical system technology and nanotechnology and other high-tech technologies, various biological electrodes continue to emerge, and have begun to be used in electrocardiogram, electroencephalogram, electromyography and electrical impedance imaging, etc. areas play an important role. [0003] The bioelectrodes currently used in clinical practice are mainly metal electrodes manufactured by machining. This kind of metal electrode not only needs to complete the packaging of the electrode through the mold, but also has high cost, complicated process, and great damage to the living body. In contrast, polyme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F222/38C08F220/06C08F220/54C08K9/04C08K7/24C08K3/04C08K3/08C08L33/26C08L79/04C08L79/02C08G73/02A61B5/0408A61B5/0492A61B5/053A61B5/296
CPCA61B5/053A61B5/4878C08F220/06C08F220/54C08F220/56C08G73/0266C08K3/04C08K7/24C08K9/08C08L33/26C08K2201/011C08K2201/001A61B5/25A61B5/296
Inventor 鲁雄刘柯志韩璐甘东林贾占荣
Owner SOUTHWEST JIAOTONG UNIV
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