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Preparation method of in-situ quaternized antibacterial agent on surface of carbon nano tube

A technology of carbon nanotubes and acidified carbon nanotubes, which is applied in the directions of biocide-containing paint, rayon manufacturing, fiber chemical characteristics, etc., can solve the problems of harsh reaction conditions, complex chemical reactions, etc. Safe, good antibacterial effect

Active Publication Date: 2016-11-16
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the chemical reaction of this method is complex, the reaction conditions are relatively harsh, and the preparation of the carrier also needs to be synthesized in advance. Therefore, it is necessary to find a carrier that can be directly used for grafting quaternary ammonium salt groups, and to explore a simple, environmentally friendly and easy-to-operate method. Preparation of antimicrobial agents is very necessary

Method used

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  • Preparation method of in-situ quaternized antibacterial agent on surface of carbon nano tube
  • Preparation method of in-situ quaternized antibacterial agent on surface of carbon nano tube
  • Preparation method of in-situ quaternized antibacterial agent on surface of carbon nano tube

Examples

Experimental program
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Effect test

Embodiment 1

[0029] (1) Carbon nanotube grafted polyethyleneimine: disperse acidified carbon nanotubes and polyethyleneimine with a molecular weight of 70000 (mass ratio of carbon nanotubes to polyethyleneimine 1:3) in deionized water, Then mix, ultrasonic treatment for 1 hour, the power is 250W, make it evenly dispersed, and stir at room temperature for 12 hours, so that polyethyleneimine and acidified carbon nanotubes fully react, the solid product obtained from the reaction is washed with ethanol and water in turn, and suction filtered After separation, polyethyleneimine-grafted carbon nanotubes are obtained.

[0030] (2) Tertiary amination reaction: disperse the carbon nanotube grafted polyethyleneimine prepared in step (1) in deionized water, stir evenly, according to the mass ratio of propylene oxide and polyethyleneimine is 5:3 Proportioning, the tertiary amination reagent propylene oxide is slowly added dropwise to the dispersion liquid, stirred and reacted at 3°C ​​for 7 hours, th...

Embodiment 2

[0033] (1) Carbon nanotube grafted polyethyleneimine: disperse acidified carbon nanotubes and polyethyleneimine with a molecular weight of 600 (mass ratio of carbon nanotubes to polyethyleneimine 1:3) in deionized water, Then mix, ultrasonic treatment for 1 hour, the power is 250W, make it evenly dispersed, and stir at room temperature for 12 hours, so that polyethyleneimine and acidified carbon nanotubes fully react, the solid product obtained from the reaction is washed with ethanol and water in turn, and suction filtered After separation, polyethyleneimine-grafted carbon nanotubes are obtained.

[0034] (2) Tertiary amination reaction: disperse the carbon nanotube grafted polyethyleneimine prepared in step (1) in deionized water, stir evenly, according to the mass ratio of propylene oxide and polyethyleneimine is 5:3 Proportioning, the tertiary amination reagent propylene oxide is slowly added dropwise to the dispersion liquid, stirred and reacted at 3°C ​​for 7 hours, the ...

Embodiment 3

[0037] (1) Carbon nanotube grafted polyethyleneimine: disperse acidified carbon nanotubes and polyethyleneimine with a molecular weight of 70000 (mass ratio of carbon nanotubes to polyethyleneimine 1:1) in deionized water, Then mix, ultrasonic treatment for 1 hour, the power is 250W, make it evenly dispersed, and stir at room temperature for 12 hours, so that polyethyleneimine and acidified carbon nanotubes fully react, the solid product obtained from the reaction is washed with ethanol and water in turn, and suction filtered After separation, polyethyleneimine-grafted carbon nanotubes are obtained.

[0038] (2) Tertiary amination reaction: disperse the carbon nanotube grafted polyethyleneimine prepared in step (1) in deionized water, stir evenly, according to the mass ratio of propylene oxide and polyethyleneimine is 2.5:1 Proportioning, the tertiary amination reagent propylene oxide is slowly added dropwise to the dispersion liquid, stirred and reacted at 3°C ​​for 7 hours, ...

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Abstract

The invention discloses a preparation method of an in-situ quaternized antibacterial agent on the surface of a carbon nano tube. The preparation method comprises the following steps: taking an acidulated carbon nano tube as a carrier, firstly grafting polyethylenimine to the surface of the carrier, and sequentially carrying out a tertiary amination reaction and a quaternization reaction on the grafted polyethylenimine so as to form an in-situ quaternized quaternary ammonium salt long-acting antibacterial agent of the carbon nano tube. The preparation method disclosed by the invention is simple and safe and is more environment-friendly, a synthetic method of the antibacterial agent is simple, less devices are used, the antibacterial effect is excellent, the using safety is high, a wide application value is obtained, and the agent can be applied to base materials such as coating, plastics, rubber, fiber and the like and material preparation and device system for water treatment, air purification and the like. The minimum antibacterial dosages of a target product of the invention on staphylococcus aureus and typical bacteria of Escherichia coli are respectively as low as 50 mg / L and 20 mg / L.

Description

technical field [0001] The invention relates to a method for obtaining a quaternary ammonium salt long-acting antibacterial agent by grafting polyethyleneimine on the surface of acidified carbon nanotubes and in-situ quaternization, which belongs to the technical field of functional materials. Background technique [0002] In recent years, people have paid more and more attention to environmental sanitation and bacterial contamination. A survey of microbial pollution in the living room showed that the total number of bacteria in rural areas was 138.94 cfu / cm2, and that in urban areas was 72.10 cfu / cm2. It can be seen that the pollution caused by microorganisms to the living room environment cannot be ignored, and the harm of bacteria to human health is very serious. Therefore, people are actively exploring antibacterial materials that can effectively inhibit bacteria for a long time. [0003] Antibacterial materials can be divided into natural antibacterial materials, inor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/14C08L21/00C08L101/00C08L79/02D01F1/10
CPCC08L21/00C08L79/02C08L101/00C09D5/14D01F1/10
Inventor 周祚万刘嘉玲徐晓玲孟凡彬姜曼王泽永
Owner SOUTHWEST JIAOTONG UNIV
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