Method for in-situ preparation of nano-silver/carboxylated chitosan composite films by using electric deposition technology

A carboxylated chitosan, in-situ preparation technology, applied in the field of materials, can solve the problems of application influence and low solubility, and achieve the effect of simple equipment, low cost and mild conditions

Active Publication Date: 2019-03-26
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low solubility of chitosan in neutral aqueous solution, the application in physiological environment is affected

Method used

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  • Method for in-situ preparation of nano-silver/carboxylated chitosan composite films by using electric deposition technology
  • Method for in-situ preparation of nano-silver/carboxylated chitosan composite films by using electric deposition technology
  • Method for in-situ preparation of nano-silver/carboxylated chitosan composite films by using electric deposition technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Preparation of carboxylated chitosan solution: first weigh 1g of carboxylated chitosan solid particle sample, add it to a beaker and then add 100mL of distilled water, stir at room temperature using a magnetic stirrer for 3 hours until carboxylated chitosan The polysaccharide solid particles are fully dissolved, and then the prepared carboxylated chitosan solution is filtered once to obtain a carboxylated chitosan solution with a mass percentage concentration of 1.0%, which is set aside;

[0030] 2) Prepare the metal electrode material: use metal silver sheet as the anode electrode material for electrodeposition, first make the metal silver sheet electrode into the required size and shape, and then repeatedly polish the metal silver sheet with sandpaper until the surface of the silver sheet is smooth and flat, Then silver sheet is immersed in acetone, dehydrated alcohol and distilled water successively, make it ultrasonically clean respectively 3 minutes (ultrasonic p...

Embodiment 2

[0033] 1) Preparation of carboxylated chitosan solution: first weigh 3 g of carboxylated chitosan solid particle samples, add it to a beaker, then add 100 mL of distilled water, and stir for 9 hours at room temperature using a magnetic stirrer until carboxylated chitosan The polysaccharide solid particles are fully dissolved, and then the prepared carboxylated chitosan solution is filtered 3 times to obtain a carboxylated chitosan solution with a mass percentage concentration of 3.0%, which is set aside;

[0034] 2) Prepare the metal electrode material: use metal silver sheet as the anode electrode material for electrodeposition, first make the metal silver sheet electrode into the required size and shape, and then repeatedly polish the metal silver sheet with sandpaper until the surface of the silver sheet is smooth and flat, Then silver sheet is immersed in acetone, dehydrated alcohol and distilled water successively, make it ultrasonically clean respectively 6 minutes (60 wa...

Embodiment 3

[0037] 1) Preparation of carboxylated chitosan solution: first weigh 1.5g of carboxylated chitosan solid particle sample, add it to a beaker and then add 300mL of distilled water, stir with a magnetic stirrer at room temperature for 6 hours until carboxylated The chitosan solid particles are fully dissolved, and then the prepared carboxylated chitosan solution is filtered twice to obtain a carboxylated chitosan solution with a mass percentage concentration of 2.0%, which is set aside;

[0038] 2) Prepare the metal electrode material: use metal silver sheet as the anode electrode material for electrodeposition, first make the metal silver sheet electrode into the required size and shape, and then repeatedly polish the metal silver sheet with sandpaper until the surface of the silver sheet is smooth and flat, Then silver sheet is immersed in acetone, dehydrated alcohol and distilled water successively, make it ultrasonic cleaning 5 minutes respectively (ultrasonic power 50 watts)...

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Abstract

The invention discloses a method for in-situ preparation of nano-silver / carboxylated chitosan composite films by using an electric deposition technology. Metal silver pieces are used as anode materials, metal platinum pieces are used as cathode materials, and carboxylated chitosan solution is used as electric deposition liquid for electric deposition; in the electric deposition process, Ag+ generated by an anode electrochemical reaction generated on the metal silver pieces is used for generating a coordination effect with carboxylated chitosan molecules to form carboxylated chitosan electric deposition films on the metal silver electrodes; meanwhile, carboxylated chitosan is used as a reducing agent for reducing Ag+ in the electric deposition films to obtain nano-silver; and the nano-silver / carboxylated chitosan composite films are prepared in situ on the anode silver pieces. The method is simple in equipment, mild in condition, convenient to operate and low in cost, has the advantagesof space selectivity, controllability, no poison, no pollution, greenness and environmental protection, and can adjust the thickness of the composite films through change of such conditions as electric deposition time and electric deposition voltage.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a method for preparing nano-silver / carboxylated chitosan composite film in situ by using electrodeposition technology. Background technique [0002] Nanosilver is a widely used metal nanomaterial, which has very important application value in optoelectronics, sensing, catalysis and biomedicine. Researchers have proved that nano silver has an antibacterial effect in fighting infection and disease. Nano silver can inhibit or kill a variety of bacteria, fungi, as well as microorganisms and viruses harmful to the human body, and has broad-spectrum, potent and long-lasting properties [Journal of Biomaterials Science-Polymer Edition, 2009, 20(14):2129-2144]. [0003] Natural polymers refer to macromolecules contained in animals, plants and microorganisms in nature. They are renewable, biodegradable, and environmentally friendly materials, such as natural polymer polysacc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D9/02B22F9/24B82Y30/00
CPCB22F9/24B22F2009/245B82Y30/00C25D9/02
Inventor 王艺峰潘捷章政李辉钟波殷洁
Owner WUHAN UNIV OF TECH
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