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Preparation method of carbon oxide nanohorn/sodium alginate-silver composite antibacterial agent, antibacterial agent, antibacterial coating and antibacterial film

A composite antibacterial agent, sodium alginate technology, applied in antibacterial agent, antibacterial coating, preparation of carbon oxide nanohorn/sodium alginate-silver composite antibacterial agent, antibacterial film field, can solve the impact of application scenarios and antibacterial effect, silver Discoloration of antibacterial agents, poor adsorption capacity and other problems, to achieve the effect of promoting adhesion capacity, increasing surface area, and improving wear resistance

Active Publication Date: 2021-07-13
RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor adsorption capacity, silver ions will dissolve and oxidize, and the silver antibacterial agent will change color under ultraviolet light, which will affect its application scene and antibacterial effect. The coating of inorganic silver-loaded antibacterial agent on the surface of transparent substrate will cause haze increase, the transmittance decreases

Method used

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  • Preparation method of carbon oxide nanohorn/sodium alginate-silver composite antibacterial agent, antibacterial agent, antibacterial coating and antibacterial film

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A preparation method of oxidized carbon nanohorn / sodium alginate-silver composite antibacterial agent, comprising the following steps:

[0029]1) Disperse single-walled carbon nanohorns in nitric acid solution and reflux at 120°C for 24 hours, wash with deionized water several times and then vacuum-dry to obtain oxidized single-walled carbon nanohorns; mix oxidized single-walled carbon nanohorns with deionized water, Ultrasound for 0.5h to completely disperse, and prepare a dispersion of oxidized single-walled carbon nanohorns with a concentration of 0.8mg / mL;

[0030] 2) Add 0.05 mol / L silver nitrate solution to the sodium alginate solution with a mass fraction of 0.01% while stirring, stir for 10 minutes, and continue to add the oxidized single-walled carbon nanohorn dispersion to obtain a mixed solution;

[0031] 3) The mixed solution was irradiated with ultraviolet light to obtain an oxidized single-walled carbon nanohorn / sodium alginate-silver dispersion liquid, an...

Embodiment 2

[0037] A preparation method of oxidized carbon nanohorn / sodium alginate-silver composite antibacterial agent, comprising the following steps:

[0038] 1) Disperse single-walled carbon nanohorns in nitric acid solution and reflux at 120°C for 24 hours, wash with deionized water several times and then vacuum-dry to obtain oxidized single-walled carbon nanohorns; mix oxidized single-walled carbon nanohorns with deionized water, Ultrasound for 1 hour to completely disperse, and prepare a dispersion of oxidized single-walled carbon nanohorns with a concentration of 1.2 mg / mL;

[0039] 2) Add 0.1 mol / L silver nitrate solution to the sodium alginate solution with a mass fraction of 0.2% while stirring, stir for 13 minutes, and continue to add the oxidized single-walled carbon nanohorn dispersion to obtain a mixed solution;

[0040] 3) The mixed solution was irradiated with an ultraviolet lamp to obtain an oxidized single-walled carbon nanohorn / sodium alginate-silver dispersion liquid...

Embodiment 3

[0046] A preparation method of oxidized carbon nanohorn / sodium alginate-silver composite antibacterial agent, comprising the following steps:

[0047] 1) Disperse single-walled carbon nanohorns in nitric acid solution and reflux at 120°C for 24 hours; ultrasonicate for 2 hours, wash with deionized water several times, and then vacuum-dry to obtain oxidized single-walled carbon nanohorns; mix oxidized single-walled carbon nanohorns with deionized Water was mixed in proportion, ultrasonically dispersed for 0.5h to make it completely dispersed, and a dispersion of oxidized single-walled carbon nanohorns with a concentration of 2.5mg / mL was prepared;

[0048] 2) Add 0.21 mol / L silver nitrate solution to the sodium alginate solution with a mass fraction of 0.5%, stir for 20 minutes, and continue to add the oxidized single-walled carbon nanohorn dispersion to obtain a mixed solution;

[0049] 3) The mixed solution was irradiated with an ultraviolet lamp to obtain an oxidized single-...

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Abstract

The invention relates to a preparation method of a carbon oxide nanohorn / sodium alginate-silver composite antibacterial agent, the antibacterial agent, an antibacterial coating and an antibacterial film. The preparation method of the carbon oxide nanohorn / sodium alginate-silver composite antibacterial agent comprises the following steps: modifying carbon nanohorns to obtain the carbon oxide nanohorns, and preparing the carbon oxide nanohorn into a carbon oxide nanohorn dispersion liquid; taking a sodium alginate solution, adding a silver nitrate solution into the sodium alginate solution, stirring, and adding the carbon oxide nanohorn dispersion liquid to obtain a mixed solution; and irradiating the mixed solution with ultraviolet rays to obtain a carbon oxide nanohorn / sodium alginate-silver dispersion liquid, centrifuging the dispersion liquid to collect precipitates, washing the precipitates, and dispersing the precipitates in deionized water to obtain the carbon oxide nanohorn / sodium alginate-silver composite antibacterial agent. The oxidized single-walled carbon nanohorn is used as a carrier, so that the binding force between the oxidized single-walled carbon nanohorn and the nano-silver can be enhanced, and the antibacterial agent has the effects of ultraviolet resistance and high temperature resistance.

Description

technical field [0001] The invention relates to the technical field of antibacterial agents and antibacterial films, in particular to a preparation method of a carbon oxide nanohorn / sodium alginate-silver composite antibacterial agent, an antibacterial agent, an antibacterial coating, and an antibacterial film. Background technique [0002] Antibacterial agent, which refers to functional materials that keep the growth and reproduction of microorganisms (including bacteria, fungi, yeast, algae and viruses, etc.) below the standard level within a certain period of time, also known as antibacterial materials. Most scholars classify antibacterial agents according to their chemical composition, and antibacterial agents can be divided into three types: organic, inorganic and natural biological antibacterial agents. Inorganic antibacterial agent: Utilize the antibacterial ability of silver, copper, zinc and other metals, and fix silver, copper, zinc and other metals (or their ions)...

Claims

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Application Information

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IPC IPC(8): A01N59/16A01N25/22A01N25/08A01P1/00C09D175/14C09D5/14C01B32/18B82Y30/00B82Y40/00
CPCA01N59/16A01N25/22A01N25/08C09D175/14C09D5/14C01B32/18B82Y30/00B82Y40/00C08K2201/011C08L5/04C08K9/02C08K3/044C08K3/28
Inventor 赵祖珍刘伟强张首沫刘浩黄曼婷
Owner RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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