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Enzyme-responsive insecticidal slow-release agent and preparation method thereof

An enzyme-responsive, slow-release technology, applied in the field of new pesticide formulations, to achieve the effects of improving pesticide utilization, good enzyme response characteristics, and a wide range of sources

Active Publication Date: 2017-10-17
HUAZHONG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art, one of the purposes is to provide an enzyme-responsive insecticidal slow-release agent, the slow-release agent has the advantages of longer duration and better enzyme response characteristics , to solve the problem of sudden release of pesticides in some carriers, reduce the loss of pesticides before reaching the target, reduce the number of pesticide applications, improve the utilization rate of pesticides and reduce the impact of pesticides on the environment

Method used

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  • Enzyme-responsive insecticidal slow-release agent and preparation method thereof
  • Enzyme-responsive insecticidal slow-release agent and preparation method thereof
  • Enzyme-responsive insecticidal slow-release agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Add 2.5g polystyrene nanospheres, 2mL ammonia water, 9.6g deionized water, 0.80g cetyltrimethylammonium bromide (CTAB) and 11.0g ethanol to the flask, ultrasonically disperse for half an hour, turn on Stir for 30 minutes, add 1.5 g of ethyl orthosilicate to the above reaction system, and react for 48 hours at room temperature;

[0041] (2) Calcining the product in a muffle furnace at 600°C for 8 hours to obtain hollow nano-silica A;

[0042] (3) Add toluene and 1.0 g of hollow nano-silica A obtained in step (2) to the three-necked flask, ultrasonically disperse for half an hour and control the reaction temperature at 110° C., add dropwise 0.3 g of anilinomethyltriethoxysilane, React for 20 hours, centrifuge to remove the supernatant, wash the obtained solid, and repeat three times to obtain aniline-modified hollow nano-silica B;

[0043] (4) Add the obtained aniline-modified hollow nano-silica B and cyantraniliprole N,N-dimethylformamide solution into the flask, an...

Embodiment 2

[0051] (1) Add 2.5g polystyrene nanospheres, 4.0mL ammonia water, 19.2g deionized water, 1.6g cetyltrimethylammonium bromide (CTAB) and 22.0g ethanol to the flask, and ultrasonically disperse for half an hour. Start stirring for 30 minutes, add 1.5 g of ethyl orthosilicate to the above reaction system, and react for 60 hours at room temperature;

[0052] (2) Calcining the product in a muffle furnace at 600°C for 8 hours to obtain hollow nano-silica A;

[0053] (3) Add toluene and 1.0 g of hollow nano-silica A obtained in step (2) to the three-necked flask, ultrasonically disperse for half an hour and control the reaction temperature at 100° C., dropwise add 0.4 g of anilinomethyltriethoxysilane, React for 24 hours, centrifuge to remove the supernatant, wash the obtained solid, and repeat three times to obtain aniline-modified hollow nano-silica B;

[0054] (4) Add the obtained aniline-modified hollow nano-silica B, chlorantraniliprole N,N-dimethylformamide solution into the f...

Embodiment 3

[0061] (1) Add 2.5g polystyrene nanospheres, 1mL ammonia water, 4.8g deionized water, 0.40g cetyltrimethylammonium bromide (CTAB) and 5.5g ethanol to the flask, ultrasonically disperse for half an hour, and turn on Stir for 30 minutes, add 1.5 g of ethyl orthosilicate to the above reaction system, and react for 48 hours at room temperature;

[0062] (2) Calcining the product in a muffle furnace at 600°C for 8 hours to obtain hollow nano-silica A;

[0063] (3) Add toluene and 1.0 g of hollow nano-silica A obtained in step (2) to the three-necked flask, ultrasonically disperse for half an hour and control the reaction temperature at 90° C., dropwise add 0.3 g of anilinomethyltriethoxysilane, React for 24 hours, centrifuge to remove the supernatant, wash the obtained solid, and repeat three times to obtain aniline-modified hollow nano-silica B;

[0064] (4) Add the obtained aniline-modified hollow nano-silica B and cyantraniliprole N,N-dimethylformamide solution into the flask, ...

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Abstract

The invention discloses an enzyme-responsive insecticidal slow-release agent and a preparation method of the slow-release agent. The preparation method comprises the steps of preparing hollow nano silica A at first, preparing phenylamino modified hollow nano silica B with a phenylamino silane coupling agent, loading an insecticide with a solvent evaporation method to obtain a product C, and blocking a mesopore by alpha-cyclodextrin to obtain the enzyme-responsive insecticidal nano slow-release agent. The preparation method is low in cost, mild in reaction conditions and low in energy consumption, and has no three-waste discharge; the obtained slow-release agent is high in loading rate, good in environment compatibility and relatively long in lasting period, solves the problem of burst release of a pesticide in some carrier, and has an enzyme response characteristic; and when alpha-amylase exists, cyclodextrin is hydrolyzed and the insecticide is quickly released, so that an active ingredient of the pesticide is better prevented from being lost before reaching a target, the application times are reduced, and effects of increasing a utilization ratio of the pesticide and improving targeting release can be achieved.

Description

technical field [0001] The invention belongs to the technical field of new formulations of insecticides, and in particular relates to an enzyme-responsive insecticide slow-release agent and a preparation method thereof. Background technique [0002] Pesticides have the advantages of high efficiency, quickness, economy, simple operation, and low labor intensity in the prevention and control of crop diseases, insect pests and weeds, and play an irreplaceable important role in the integrated pest control. In 2016, the production volume of chemical pesticides in China reached 3.778 million tons, and the usage amounted to 1.8 million tons, mainly conventional pesticide formulations such as emulsifiable concentrate, wettable powder and water emulsion. [0003] Due to the problems of a large number of organic solvents used in conventional pesticide formulations, dust drift, poor dispersibility, etc., and the ability to control the release of active ingredients, more than 90% of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/08A01N63/00A01N43/56A01P7/04
CPCA01N25/08A01N43/56A01N63/00
Inventor 何顺万虎高云昊李建洪游红张彦辉肖亚楠张园秦雪莹
Owner HUAZHONG AGRI UNIV
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