Pesticide nano preparation and preparation method thereof

A nano-formulation and pesticide technology, applied in the field of pesticide nano-formulation and its preparation, can solve the problems of complex preparation process, pollution, waste and the like

Inactive Publication Date: 2020-09-04
GUANGDONG ACAD OF SCI INST OF BIOENGINEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Many pesticides are easy to photolyze, and will lose their activity due to photolysis during use, resulting in waste and pollution
In the prior art, the preparation of anti-photolysis pesticide nano-preparation is usually to first prepare the nano-carrier with anti-photolysis function, and then load the pesticide. The preparation process is complicated, the cost is high, and it is easy to cause pollution and waste.

Method used

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  • Pesticide nano preparation and preparation method thereof
  • Pesticide nano preparation and preparation method thereof

Examples

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preparation example Construction

[0022] The preparation method of a kind of pesticide nano-preparation of the present invention comprises the following steps:

[0023] Dissolving the pesticide in an organic solvent, adding the obtained pesticide solution into water for ultrasonication, to obtain a pesticide nanoparticle dispersion;

[0024] Mixing the pesticide nanoparticle dispersion, dopamine hydrochloride aqueous solution and Tris-HCl buffer solution, so that the pH value of the obtained mixed material solution is 7.5 to 9.5, and then perform a polymerization reaction to obtain a polymerization product system;

[0025] The polymerization product system is dialyzed and dried in sequence to obtain the pesticide nano-preparation.

[0026] In the invention, the pesticide is dissolved in the organic solvent, and the obtained pesticide solution is added into water for ultrasonication to obtain the pesticide nano particle dispersion liquid. In the present invention, the pesticide preferably includes at least one...

Embodiment 1

[0038]Dissolve 5mg of abamectin in 2mL of absolute ethanol, quickly add the gained abamectin solution into 98mL of water, and ultrasonicate for 20s under 40kHz to obtain abamectin nanoparticle dispersion;

[0039] Above-mentioned 100mL avermectin nanoparticle dispersion liquid, 1mL dopamine hydrochloride aqueous solution (concentration is 10mg / mL) and 1mL Tris-HCl buffer solution (concentration is 10mg / mL) are mixed, make the pH value of gained system be 8.5, in dark place , Standing reaction at room temperature (25°C) for 24 hours, after the reaction, due to the wrapping of the polydopamine shell, the color of the system becomes light gray black; the resulting system after the reaction is put into a dialysis bag with a molecular weight cut-off of 3500, and in Avermella The abamectin was dialyzed for 2 days in a saturated aqueous solution of abamectin, and then the feed liquid in the dialysis bag was freeze-dried for 24 hours to obtain the abamectin nano-preparation.

[0040] ...

Embodiment 2

[0043] The pesticide nano-preparation was prepared according to the method of Example 1, except that the pesticide abamectin was replaced by fipronil, and the organic solvent for dissolving fipronil was anhydrous methanol, and finally the fipronil nano-preparation was obtained.

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Abstract

The invention provides a pesticide nano preparation and a preparation method thereof, and belongs to the technical field of pesticide preparations. The preparation method of the pesticide nano preparation provided by the invention comprises the following steps: dissolving a pesticide in an organic solvent, adding the obtained pesticide solution into water, and carrying out ultrasonic treatment toobtain a pesticide nano particle dispersion liquid; mixing the pesticide nanoparticle dispersion liquid, a dopamine hydrochloride aqueous solution and a Tris-HCl buffer solution to enable the pH valueof the obtained mixed material liquid to be 7.5-9.5, and then performing polymerization reaction to obtain a polymerization product system; and dialyzing and drying the polymerization product systemin sequence to obtain the pesticide nano preparation. According to the invention, dopamine hydrochloride in-situ polymerization is utilized to form a polydopamine shell on the surfaces of the pesticide nanoparticles, and the polydopamine shell can well absorb light, has a protective effect on the pesticide and avoids photolysis of the pesticide. Meanwhile, the method provided by the invention is simple and convenient to operate, low in cost, good in repeatability, green and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of pesticide preparations, in particular to a pesticide nano-preparation and a preparation method thereof. Background technique [0002] Many pesticides are easy to photolyze, and will lose their activity due to photolysis during use, resulting in waste and pollution. In the prior art, the preparation of anti-photolysis pesticide nano-preparation is usually to prepare the nano-carrier with anti-photolysis function first, and then load the pesticide. The preparation process is complicated, the cost is high, and it is easy to cause pollution and waste. Contents of the invention [0003] The purpose of the present invention is to provide a pesticide nano-preparation and its preparation method. The present invention uses dopamine hydrochloride in-situ polymerization to form a polydopamine shell on the surface of the pesticide nano-particles. The polydopamine shell can absorb light very well and protect the pes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/28A01N25/10A01N43/90A01N47/02A01N47/38A01N57/14C08G73/06
CPCA01N25/10A01N25/28A01N43/90A01N47/02A01N47/38A01N57/14C08G73/0672
Inventor 王珂陈骏佳谢东刘海露李发勇
Owner GUANGDONG ACAD OF SCI INST OF BIOENGINEERING
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