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Silver-titanium dioxide-chitosan composite antibacterial filter material and preparation method thereof

A titanium dioxide and composite antibacterial technology, applied in chemical instruments and methods, separation methods, filtration and separation, etc., can solve the problems of human injury, high radioactive ultraviolet energy, etc., achieve good antibacterial effect and improve the effect of sterilization efficiency

Pending Publication Date: 2021-02-23
SHENZHEN MEIZHAO ENERGY & ENVIRONMENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the ultraviolet lamp disinfection method has been widely used to kill microorganisms in the air, but this method uses a large amount of radioactive ultraviolet energy, which can easily cause great harm to the human body.

Method used

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  • Silver-titanium dioxide-chitosan composite antibacterial filter material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Dissolve 15g of 80% deacetylated chitosan powder in 50g of 3% formic acid solution, adjust the pH to 2.6, stir continuously at a speed of 100r / min for 12h until completely dissolved, add 15g of titanium dioxide powder, and continue stirring at a speed of 100r / min for 24h to obtain a viscous colloid solution. Add 25% glutaraldehyde solution into the viscous colloid solution, stir and react at 100r / min for 24h, add 0.5mol· -1 L sodium hydroxide solution was driven by a peristaltic pump to form hydrogel beads, the hydrogel beads were collected, washed with deionized water, and dried at 90° C. for 12 hours to obtain titanium dioxide-chitosan hydrogel beads. Add 15g of zero-valent nano-silver particles and 85g of titanium dioxide-chitosan hydrogel beads into the photochemical reactor, adjust the wavelength of ultraviolet light to 350nm, and react for 6h in a nitrogen-protected environment. It was washed with deionized water and dried at 120°C for 10 hours to obtain a silver...

Embodiment 2

[0035] Dissolve 20g of 80% deacetylated chitosan powder in 60g of 3% acetic acid solution, adjust the pH to 2.6, stir continuously at a speed of 100r / min for 12h until completely dissolved, add 20g of titanium dioxide powder, and continue stirring at a speed of 100r / min for 24h to obtain a viscous colloidal solution. Add 25% glutaraldehyde solution into the viscous colloid solution, stir and react at 100r / min for 24h, add 0.5mol· -1 L sodium hydroxide solution was driven by a peristaltic pump to form hydrogel beads, the hydrogel beads were collected, washed with deionized water, and dried at 90° C. for 12 hours to obtain titanium dioxide-chitosan hydrogel beads. Add 20g of zero-valent nano-silver particles and 80g of titanium dioxide-chitosan hydrogel beads into the photochemical reactor, adjust the wavelength of ultraviolet light to 350nm, and react for 6h in a nitrogen-protected environment. It was washed with deionized water and dried at 120°C for 10 hours to obtain a silv...

Embodiment 3

[0038] Dissolve 20g of 80% deacetylated chitosan powder in 60g of 5% formic acid solution, adjust the pH to 2.8, stir continuously at a speed of 100r / min for 12h until completely dissolved, add 15g of titanium dioxide powder, and continue stirring at a speed of 100r / min for 24h to obtain a viscous colloid solution. Add 30% glutaraldehyde solution into the viscous colloid solution, stir and react at 100r / min for 24h, add 0.5mol· -1 L sodium hydroxide solution was driven by a peristaltic pump to form hydrogel beads, the hydrogel beads were collected, washed with deionized water, and dried at 90° C. for 12 hours to obtain titanium dioxide-chitosan hydrogel beads. Add 15g of zero-valent nano-silver particles and 90g of titanium dioxide-chitosan hydrogel beads into the photochemical reactor, adjust the wavelength of ultraviolet light to 350nm, and react for 6h in a nitrogen-protected environment. It was washed with deionized water and dried at 120°C for 10 hours to obtain a silver...

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Abstract

The invention belongs to the technical field of air antibiosis, and provides a silver-titanium dioxide-chitosan composite antibacterial filter material and a preparation method thereof, and the filtermaterial can effectively inhibit and kill microorganisms in air. The method includes: firstly synthesizing titanium dioxide-chitosan hydrogel microbeads, and then uniformly dispersing nano-silver particles on the surface of the titanium dioxide-chitosan composite material through a photochemical deposition method to prepare the silver-titanium dioxide-chitosan composite antibacterial filter material. The antibacterial filter material has the outstanding characteristics and excellent effects that: the nano-silver particles have a very high specific surface area and can be in full contact withair, the sterilization efficiency is improved, zero-valent nano-silver particles are adopted, the antibacterial effect is better than that of common nano-silver, and the prepared antibacterial filtermaterial can be widely applied to indoor air sterilization.

Description

technical field [0001] The invention belongs to the technical field of air antibacterial, and provides a silver-titanium dioxide-chitosan composite antibacterial filter material and a preparation method thereof Background technique [0002] Human beings are inseparable from the air all the time, and the pollutants and microorganisms in the air will bring harm to people's health. Living in turbid air for a long time will cause harm to the nervous system, respiratory system, and immune system of the human body, resulting in decreased immunity and related diseases. For the hospital environment and people with low immune function, microorganisms in the air will increase the risk of illness risk of infectious disease. Therefore, safe and effective microbiological control of the air is an extremely important issue in today's society. [0003] At present, the commonly used methods of killing airborne microorganisms include ultraviolet lamp disinfection, alcohol disinfection, elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/14
CPCB01D39/14
Inventor 周子文张维黄虹淋
Owner SHENZHEN MEIZHAO ENERGY & ENVIRONMENT TECH
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