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Avermectin nanopowder and preparation and use method thereof

A technology of avermectin and nanopowder, which is applied in the field of pesticides, can solve problems such as difficult application effects, inconvenient storage and transportation, and stability problems, so as to improve production efficiency, pesticide utilization rate, stable product quality, and easy packaging Effect

Active Publication Date: 2019-05-24
INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The main disadvantage of liquid preparations is the stability problem. Usually, more stabilizers and suspending agents need to be added to maintain the stability of the system. They are easily destroyed by external environmental interference and are inconvenient for storage and transportation.
Pesticide nanopowders can significantly improve the stability, convenience and safety of storage and transportation, but problems such as agglomeration, flocculation, and sedimentation caused by the interaction of electrostatic attraction and van der Waals force during the dispersion process have not been effectively overcome and Solve, making it difficult to exert the ideal application effect

Method used

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  • Avermectin nanopowder and preparation and use method thereof
  • Avermectin nanopowder and preparation and use method thereof
  • Avermectin nanopowder and preparation and use method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Embodiment 1, prepare the emamectin benzoate nanopowder of mass concentration 20%

[0037] The implementation steps of this embodiment are as follows:

[0038] (1) 20g emamectin benzoate, 30g surfactant alkylphenol polyoxyethylene ether phosphate ester salt, 3g stabilizer BHT are dissolved in ethyl acetate to obtain a uniformly dispersed transparent solution A;

[0039] (2) Add 9ml of water dropwise to solution A, add 47g of sodium benzoate after stirring to obtain mixture B;

[0040] (3) The mixture B is heated to 50 degrees to make it fully activated and act, and obtain the emamectin benzoate nanopowder after drying ethyl acetate and moisture in an oven.

[0041]The emamectin benzoate nanopowder prepared by the present embodiment is dispersed with distilled water, and the Nano ZS90 laser particle size analyzer produced by Malvern Company is used to record its average particle diameter of 35nm, and the suspension rate is 99.5%. , Wetting time is 20s.

Embodiment 2

[0042] Embodiment 2, prepare the emamectin benzoate nanopowder of mass concentration 25%

[0043] The implementation steps of this embodiment are as follows:

[0044] (1) 25g emamectin benzoate, 5g surfactant maleic rosin polyoxyethylene-oxypropylene ether sulfonate, 5g stabilizer sodium thiosulfate are dissolved in ethyl acetate to obtain dispersion Uniform transparent solution A;

[0045] (2) Add 7ml of water dropwise to solution A, add 65g of sodium benzoate after stirring, to obtain mixture B;

[0046] (3) The mixture B is heated to 50 degrees to make it fully activated and act, and obtain the emamectin benzoate nanopowder after drying ethyl acetate and moisture in an oven.

[0047] The emamectin benzoate nanopowder prepared by the present embodiment is dispersed with distilled water, and the Nano ZS90 laser particle size analyzer produced by Malvern Company is used to record its average particle diameter of 65nm, and the suspension rate is 99.2%. , Wetting time is 25s....

Embodiment 3

[0048] Embodiment 3, prepare the Abamectin B1 nanometer powder of mass concentration 15%

[0049] The implementation steps of this embodiment are as follows:

[0050] (1) 15g Abamectin B1, 20g surfactant styrylphenol polyoxyethylene ether, 10g stabilizer sodium thiosulfate are dissolved in ethyl acetate to obtain uniformly dispersed transparent solution A;

[0051] (2) Add 7ml of water dropwise to solution A, add 55g of sodium benzoate after stirring to obtain mixture B;

[0052] (3) The mixture B is heated to 45 degrees to fully activate and act, and obtain the abamectin nano powder after drying ethyl acetate and moisture in an oven.

[0053] The Abamectin B1 nano powder prepared by the present embodiment is dispersed with distilled water, and then using the Nano ZS90 laser particle size analyzer produced by Malvern company to record its average particle diameter is 75nm, the suspension rate is 99%, and the wetting time is 24s.

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Abstract

The invention provides avermectin nanopowder and a preparation and use method thereof. The avermectin nanopowder is made from, by weight, 1-25% of avermectin / methamidoavermectin benzoate, 1-30% of a surfactant, 0.5-10% of a stabilizer, and 35-65% of a functional carrier. The functional carrier is a compound which contains at least one phenyl and one carboxylic group. The preparation method does not require high energy consumption equipment such as a grinder, the preparation process is simple and easy to control, the quality of products is stable, the reproducibility is good, the production efficiency and the utilization rate of pesticides are improved, and the production cost is saved. Due to the small size effect, the large specific surface effect, the interfacial effect and the high permeability characteristics of a nano preparation, the dispersity and dissolution rate of insoluble pesticides are easily improved, the bioavailability of the nano powder is improved, the consumption ofpesticides is reduced, and residual pollution is reduced.

Description

technical field [0001] The invention belongs to the technical field of pesticides, and in particular relates to an avermectin nanopowder and a preparation and use method thereof. Background technique [0002] Agricultural biological disasters occur very frequently in my country, and there are more than 100 major pests and diseases that occur all year round, posing a major threat to food security. Pesticides are an important material basis for defending against major biological disasters, ensuring food security, and promoting sustained and stable growth in agricultural production. my country's annual chemical control area is as high as 6 billion mu, and it is the world's largest producer and user of pesticides. [0003] At present, the proportion of high-efficiency and environmentally friendly pesticide formulations produced and used in my country is not high, and traditional formulations such as emulsifiable concentrates and wettable powders are still the main ones. There a...

Claims

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Application Information

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IPC IPC(8): A01N43/90A01N25/14A01N25/04A01P7/04B82Y30/00B82Y40/00
Inventor 崔海信崔博高飞张燕卿
Owner INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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