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A kind of nano antibacterial agent, preparation method and application thereof

A nano-antibacterial agent and halloysite nanotube technology, which is applied in the field of new agricultural materials, can solve the problems of loss and insignificant effect, and achieve the effect of high-efficiency inhibition or killing, and good inhibition and killing effect.

Active Publication Date: 2021-06-01
AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Halloysite is a natural clay mineral material. Halloysite nanotubes have a natural curly tubular structure and strong adsorption capacity, and its large aspect ratio and small particle size can be absorbed by crops. It is transported in the body, if the drug is directly adsorbed in its official cavity, there will still be loss during the use of the drug, and the effect will not be obvious

Method used

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  • A kind of nano antibacterial agent, preparation method and application thereof
  • A kind of nano antibacterial agent, preparation method and application thereof
  • A kind of nano antibacterial agent, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] S1. first acidify 10g HNTs with hydrochloric acid, the concentration of hydrochloric acid is 3mol / L, and the addition amount of hydrochloric acid is 200mL;

[0037] S2. Disperse the acidified HNTs in 500 mL of ethanol with a volume fraction of 95%, and ultrasonically disperse for 0.5 h;

[0038] S3. Then add 20mL triethylamine and 30mL 3-aminopropyltriethoxysilane;

[0039] S4. Then heat and reflux reaction at constant temperature for 24h, the heating temperature is 80°C, after the reaction, separate the solid and liquid, wash with ethanol with a volume fraction of 95%, then dry in a vacuum oven at 60°C, and grind the 300 mesh sieves, obtain amino-modified HNTs (HNTs-NH), standby;

[0040] S5. Get 0.17g of the amino-modified HNTs-NH prepared in S4 (based on the amino group in the halloysite nanotube molecular structure, the concentration is 10mmol) and disperse it in 100mL deionized water, then add 2mL of acetyl chloride dropwise (the concentration is 20mmol) , reacte...

Embodiment 2

[0051] S1. first acidify 10g HNTs with hydrochloric acid, the concentration of hydrochloric acid is 3mol / L, and the addition amount of hydrochloric acid is 200mL;

[0052] S2. Disperse the acidified HNTs in 500 mL of ethanol with a volume fraction of 95%, and ultrasonically disperse for 0.5 h;

[0053] S3. Then add 20mL triethylamine and 30mL 3-aminopropyltriethoxysilane;

[0054] S4. Then heat and reflux reaction at constant temperature for 24h, the heating temperature is 80°C, after the reaction, separate the solid and liquid, wash with ethanol with a volume fraction of 95%, then dry in a vacuum oven at 60°C, and grind the 300 mesh sieves, obtain amino-modified HNTs, standby;

[0055] S5. Get 0.17g of the amino-modified HNTs-NH prepared in S4 (based on the amino group in the halloysite nanotube molecular structure, the concentration is 10mmol) and disperse it in 100mL deionized water, then add 2mL of acetyl chloride dropwise (the concentration is 20mmol) , reacted at room ...

Embodiment 3

[0066] S1. first acidify 10g HNTs with hydrochloric acid, the concentration of hydrochloric acid is 3mol / L, and the addition amount of hydrochloric acid is 200mL;

[0067] S2. Disperse the acidified HNTs in 500 mL of ethanol with a volume fraction of 95%, and ultrasonically disperse for 0.5 h;

[0068] S3. Then add 20mL triethylamine and 30mL 3-aminopropyltriethoxysilane;

[0069] S4. Then heat and reflux reaction at constant temperature for 24h, the heating temperature is 80°C, after the reaction, separate the solid and liquid, wash with ethanol with a volume fraction of 95%, then dry in a vacuum oven at 60°C, and grind the 300 mesh sieves, obtain amino-modified HNTs, standby;

[0070] S5. Get 0.17g of the amino-modified HNTs-NH prepared in S4 (based on the amino group in the halloysite nanotube molecular structure, the concentration is 10mmol) and disperse it in 100mL deionized water, then add 2mL of acetyl chloride dropwise (the concentration is 20mmol) , react at room te...

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Abstract

The invention discloses a nano antibacterial agent, a preparation method and an application thereof, belonging to the technical field of new agricultural materials. The nano-antibacterial agent includes halloysite nanotubes and quaternary phosphonium salts. The preparation method is to first acidify HNTs, ultrasonically disperse them in ethanol, add triethylamine and organosiloxane, heat and reflux at a constant temperature, and the reaction ends Finally, solid-liquid separation, washing, drying, and sieving to obtain amino-modified HNTs, disperse in deionized water, add acetyl chloride dropwise to obtain acetylated HNTs, add quaternary phosphonium salt and stir, and then stir to react. Freeze-dry to obtain the nano antibacterial agent. The nano antibacterial agent has a good inhibitory and killing effect on the pathogenic bacteria Fusarium oxysporum of banana wilt.

Description

technical field [0001] The invention relates to the technical field of new agricultural materials, in particular to a nano antibacterial agent, a preparation method and an application thereof. Background technique [0002] Banana wilt, also known as banana Panama disease and yellow leaf disease, is a devastating banana fungal disease and a typical soil-borne disease caused by Fusarium oxysporum infection and necrosis of vascular bundles. [0003] Due to its great harm, it has to be used for a long time in the process of banana planting to prevent the disease from affecting the growth of plants. Although disinfecting banana seedlings, strengthening cultivation management, and implementing intercropping and crop rotation have curbed the spread of the disease to a certain extent, judging from the current actual situation, the effect is not ideal. In terms of chemical control, since banana fusarium wilt is a soil-borne vascular disease, general chemical agents are almost ineffe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N57/34A01N59/00A01N25/08A01P3/00
CPCA01N25/08A01N57/34A01N59/00
Inventor 王超谢江辉李普旺杜丽清杨子明孙德权何祖宇周闯刘运浩
Owner AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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