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Preparation method of antibacterial conductive adhesive hydrogel

A hydrogel and adhesion technology, applied in the field of materials, can solve problems such as antibiotic resistance and achieve good antibacterial properties, good biocompatibility, and excellent antibacterial performance

Active Publication Date: 2021-09-03
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Antibiotic-based antimicrobial adhesives have been developed, but overuse of antibiotics has led to bacterial resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Preparation of chitosan quaternary ammonium salt / tannic acid precursor solution: Dissolve 1 g of chitosan quaternary ammonium salt in 100 ml of distilled water by weight and stir magnetically for 4 hours to form chitosan quaternary ammonium salt solution, add 0.1g of tannic acid magnetic stirring forms chitosan quaternary ammonium salt / tannic acid precursor solution;

[0035] (2) Preparation of hydrogel: Add 20g of acrylamide monomer and 10g of acrylic acid monomer to the hydrogel precursor solution, stir well and add 40mg of N,N-methylenebisacrylamide, 2g of Potassium persulfate was stirred evenly at 10°C, poured into a pre-prepared mold, and sealed for 24 hours at 30°C to obtain an antibacterial conductive adhesive hydrogel.

Embodiment 2

[0037] (1) Preparation of chitosan quaternary ammonium salt / tannic acid precursor solution: 0.15 kg of chitosan quaternary ammonium salt was dissolved in 10 kg of distilled water and mechanically stirred for 24 hours to form chitosan quaternary ammonium salt solution, Add 0.05kg of tannic acid and stir to form chitosan quaternary ammonium salt / tannic acid precursor solution;

[0038] (2) Preparation of hydrogel: add 2kg of acrylamide monomer and 1kg of acrylic acid monomer to the hydrogel precursor solution, stir well and add 0.04kg of polyethylene glycol diacrylate, 0.2kg of diacrylate AZBN was stirred evenly at 0°C, poured into a pre-prepared mold, and sealed for 4 hours at 50°C to obtain an antibacterial conductive adhesive hydrogel.

Embodiment 3

[0040] (1) Preparation of chitosan quaternary ammonium salt / tannic acid precursor solution: 30 g of chitosan quaternary ammonium salt was dissolved in 2000 g parts by weight of distilled water and mechanically stirred for 14 hours to form chitosan quaternary ammonium salt solution, adding The tannic acid of 2g is stirred to form chitosan quaternary ammonium salt / tannic acid precursor solution;

[0041] (2) Preparation of hydrogel: add 500g of acrylamide monomer and 100g of ethyl acrylate monomer to the hydrogel precursor solution, stir well and add 2g of N,N-methylenebisacrylamide, 50g of ammonium persulfate was stirred evenly at 4°C, then poured into a pre-prepared mold, and sealed at 40°C for 12 hours to obtain an antibacterial conductive adhesive hydrogel.

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PUM

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Abstract

The invention discloses a preparation method of antibacterial conductive adhesive hydrogel. The preparation method is characterized by comprising the following steps: forming an aqueous solution with a certain concentration from chitosan quaternary ammonium salt, adding a proper amount of tannic acid, stirring to form a tannic acid / chitosan quaternary ammonium salt precursor solution, then adding an acrylic monomer, uniformly stirring, adding a cross-linking agent and an initiator, and preparing and molding through a one-pot method. The hydrogel obtained by the invention has good biocompatibility, antibacterial property, adhesiveness and oxidation resistance, also has good conductivity and strain sensitivity, and can be used in the biomedical fields of wound repair, electronic skin, human-computer interaction, health monitoring, wearable electronic equipment and the like.

Description

technical field [0001] The invention relates to a preparation method of an antibacterial conductive adhesive hydrogel, which belongs to the field of materials. Background technique [0002] As a medium for various biomedical applications, conductive hydrogels have been widely used in flexible sensors, touchscreens, wearable devices, electrostimulation therapy, etc. Traditional wearable medical bioelectrodes are usually composed of electrode sheets, back villages, adhesives, electrolyte hydrogels, etc. Although biomedical electrodes have been commercialized, they usually require the assistance of binders due to the lack of adhesion of electrolyte gels. In addition, the backing of commercial electrodes severely affects the visibility of the underlying tissue. What's more deadly is that biomedical electrodes lack good antibacterial and anti-oxidative properties, which makes them a one-time product and cannot be used repeatedly. Therefore, it is urgent to design a conductive ...

Claims

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Application Information

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IPC IPC(8): C08F251/00C08F220/56C08F220/06C08F222/38C08F283/06C08F220/18
CPCC08F251/00C08F283/065C08F220/56C08F220/06C08F222/385C08F220/1802Y02A50/30
Inventor 但年华余国飞陈一宁
Owner SICHUAN UNIV
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