Nano photolysis-resistant controlled-release pesticide taking lignin as coating matrix and preparation method thereof

A technology for controlled release of pesticides and lignin, applied in the field of pesticides, can solve the problems of difficulty in generating stable nano-suspensions, unsolved problems of photolysis of emamectin salts, complicated preparation processes, etc., and achieves good resistance to photolysis and oxidation. The effect of anti-oxidation and simple preparation process

Active Publication Date: 2020-04-03
GAUNGXI TIANYUAN BIOCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although controlled-release nanoformulation technology is well established medically in drug delivery, its application in agriculture is still in the exploratory stage
This is due to the difficulty in producing stable nanosuspensions with controlled particle size distribution and the high cost in the preparation process
[0005] Invention patent CN101830760 A describes a kind of emamectin benzoate-algae slow-release microcapsule insecticide and its preparation method. The obtained preparation has a slow-release function and prolongs the duration of use of emamectin benzoate, but does not solve the problem of emamectin benzoate. The problem of photolysis of dimensional salt after application; invention patent CN 103168773 A discloses a method for preparing pesticide water-suspended nanocapsules based on a microemulsion template, which can be used to prepare lambda-cyhalothrin microemulsion; invention patent CN106417269A discloses a A water-based nanoparticle water-dispersed preparation of a fat-soluble pesticide and a preparation method thereof, which can be applied to the pesticide abamectin
[0006] However, the currently disclosed lignin nano-pesticide particle preparations may have disadvantages such as low drug loading, poor stability, complex preparation process, high cost, weak photolysis resistance, and low adaptability.

Method used

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  • Nano photolysis-resistant controlled-release pesticide taking lignin as coating matrix and preparation method thereof
  • Nano photolysis-resistant controlled-release pesticide taking lignin as coating matrix and preparation method thereof
  • Nano photolysis-resistant controlled-release pesticide taking lignin as coating matrix and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Example 1 Preparation of 3.3% Abamectin with lignin as the nano-anti-photolysis controlled-release pesticide preparation of the coating matrix

[0048] (1) Take by weighing 3.87Kg sodium lignosulfonate and be dissolved in 116L deionized water, leave standstill to obtain the solution of sodium lignosulfonate after dissolving completely, set aside;

[0049] (2) Add surfactant Siben-60 3.8Kg to the solution obtained in step (1), then high-speed stirring emulsification to obtain emulsion;

[0050] (3) Take by weighing 6.3Kg Abamectin and be dissolved in 30L butyl acetate, stir and dissolve, obtain the solution containing pesticide active molecule;

[0051] (4) Weigh 0.1Kg p-phenylenediamine and dissolve it in 20L0.15M H 2 SO 4 , then cool to 0-5°C and add 0.11KgNaNO 2 Continue to stir to obtain cross-linking agent solution;

[0052] (5) The solution of the pesticide active molecule obtained in step (3) was gradually added into the emulsion obtained in step (2) under hig...

Embodiment 2

[0056] Example 2 Preparation of 5% lambda-cyhalothrin nano-anti-photolysis controlled-release pesticide formulation with lignin as the encapsulation matrix

[0057] (1) Take by weighing 4.0Kg sodium lignosulfonate and be dissolved in 120L deionized water, leave standstill to obtain the solution of sodium lignosulfonate after dissolving completely, set aside;

[0058] (2) Add surfactant Tween-80 4.0Kg to the solution obtained in step (1), then high-speed stirring emulsification to obtain emulsion;

[0059] (3) Take 10.2Kg of lambda-cyhalothrin and dissolve it in 42L of ethyl acetate, stir and dissolve to obtain a solution containing active pesticide molecules;

[0060] (4) Weigh 0.12Kg p-phenylenediamine and dissolve it in 20L 0.15M H 2 SO 4 , then cool to 0-5°C and add 0.15KgNaNO 2 , continue stirring to obtain a crosslinking agent solution;

[0061] (5) The solution of the pesticide active molecule obtained in step (3) was gradually added into the emulsion obtained in ste...

Embodiment 3

[0065] Example 3 Preparation of 5% beta-cypermethrin nano-anti-photolysis controlled-release pesticide formulation with lignin as the encapsulation matrix

[0066] (1) Take by weighing 4.0Kg sodium lignosulfonate and be dissolved in 120L deionized water, leave standstill to obtain the solution of sodium lignosulfonate after dissolving completely, set aside;

[0067] (2) Add surfactant Tween-80 4.0Kg to the solution obtained in step (1), then high-speed stirring emulsification to obtain emulsion;

[0068] (3) Take by weighing 10.2Kg beta-cypermethrin and dissolve it in 42L ethyl acetate, stir and dissolve to obtain a solution containing active pesticide molecules;

[0069] (4) Weigh 0.12Kg p-phenylenediamine and dissolve it in 20L 0.15M H 2 SO 4 , then cool to 0-5°C and add 0.15KgNaNO 2 , continue stirring to obtain a crosslinking agent solution;

[0070] (5) The solution of the pesticide active molecule obtained in step (3) was gradually added into the emulsion obtained in...

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Abstract

The invention discloses a nano photolysis-resistant controlled-release pesticide taking lignin as a coating matrix. According to the preparation method, water-soluble lignosulfonate is taken as a coating substrate, intermolecular crosslinking is carried out on the lignosulfonate by using a crosslinking agent, and then active molecules of a pesticide active compound are coated in lignin molecules,so that the nano photolysis-resistant controlled-release pesticide taking lignin as the coating matrix can be obtained. The nano photolysis-resistant controlled-release pesticide provided by the invention has very good photolysis-resistant and antioxidant effects and very good slow-release effect, and has the advantages of high and controllable drug loading capacity and simple preparation process.

Description

technical field [0001] The invention relates to the technical field of pesticides, in particular to a nano photolysis-resistant and controlled-release pesticide with lignin as a coating matrix and a preparation method thereof. Background technique [0002] With the development of agricultural production in our country, due to the increase in the use of pesticides, the problem of pesticide residues is becoming more and more serious, which has a great impact on the environmental ecology and people's health. In addition to speeding up the research and development of new pesticide products with high efficiency and low toxicity, improving the dosage forms and formulas of existing pesticides, reducing the amount of pesticides used, and giving full play to the efficacy of existing pesticides is another effective way for the sustainable development of modern agriculture and environmental protection. [0003] Lignin is a unique renewable natural aromatic polymer and the second most a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/04A01N25/22A01N25/28A01N43/90A01N53/08A01N43/56A01N47/38A01N51/00A01N43/54A01N43/653A01N47/02A01N43/36A01P7/04
CPCA01N25/04A01N25/22A01N25/28A01N43/90A01N53/00A01N43/56A01N47/38A01N51/00A01N43/54A01N43/653A01N47/02A01N43/36
Inventor 崔建国莫冬梅黄燕敏李卫国江杨李香荧甘春芳卢瑞
Owner GAUNGXI TIANYUAN BIOCHEM
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