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Pesticide-carrying microspherical suspending agent prepared by employing self-assembled lignin base material and method

A lignin-based, pesticide microsphere technology, applied in the fields of botanical equipment and methods, chemicals for biological control, applications, etc., can solve the problems of easy photolysis and easy degradation of pesticides, and achieve simple equipment and green solvent. Non-toxic and pollution-reducing effect

Inactive Publication Date: 2017-06-13
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a method for preparing pesticide-loaded microsphere suspensions with a new type of self-assembled sodium lignosulfonate wall material for the problems of easy degradation and photolysis of some pesticides.

Method used

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  • Pesticide-carrying microspherical suspending agent prepared by employing self-assembled lignin base material and method
  • Pesticide-carrying microspherical suspending agent prepared by employing self-assembled lignin base material and method
  • Pesticide-carrying microspherical suspending agent prepared by employing self-assembled lignin base material and method

Examples

Experimental program
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Effect test

Embodiment 1

[0046] (1) Dissolve 318g of sodium lignosulfonate in 212g of water, and stir at room temperature for 72 hours at a speed of 800rmp to make a 60wt% aqueous solution of sodium lignosulfonate; 112.75g of cetyltrimethyl bromide Ammonium is dissolved in the alcohol-water mixed solvent that 67.65g ethanol and 45.1g water form, at normal temperature with the rotating speed of 700rmp stirring 72 hours, the cetyltrimethylammonium bromide mixed solution of making 50wt%; Lignin Sodium sulfonate aqueous solution and cetyltrimethylammonium bromide mixed solution are mixed in the ratio of 2.82:1 with the mass ratio of solute, that is, the mass ratio of sodium lignosulfonate and cetyltrimethylammonium bromide to form Anion and cation composite solution; under the condition of stirring (rotating speed is 500rpm), 2000g of water is evenly added dropwise in the composite solution within 30 minutes; after standing for 24 hours, the precipitate is washed with water, and the washed precipitate is w...

Embodiment 2

[0062](1) 220g sodium lignosulfonate was dissolved in 147g water, stirred at room temperature with a rotating speed of 750rmp for 68 hours to make 60wt% sodium lignosulfonate aqueous solution; 78g octadecyltrimethylammonium chloride Be dissolved in the alcohol-water mixed solvent that 46.8g ethanol and 31.2g water form, stir 68 hours with the rotating speed of 750rmp at normal temperature, make the cetyltrimethylammonium bromide mixed solution of 50wt%; The mixed solution of sodium lignosulfonate solution and cetyltrimethylammonium bromide is mixed at the ratio of solute mass ratio, that is, the mass ratio of sodium lignosulfonate to cetyltrimethylammonium bromide, which is 2.8:1, to form yin and yang Ion composite concentrated solution; under the condition of stirring (rotating speed is 800rpm), 1500g of water is evenly added dropwise into the composite solution within 30 minutes; after standing for 24 hours, the precipitate is washed with water, and the washed precipitate Fr...

Embodiment 3

[0066] (1) Dissolve 100g sodium lignosulfonate in 66.7g water, stir at room temperature for 50 hours with a rotating speed of 500rmp to make a 60wt% sodium lignosulfonate aqueous solution; dissolve 36g dodecyldimethylbenzyl Ammonium chloride was dissolved in an alcohol-water mixed solvent composed of 21.6g isobutanol and 14.4g water, and stirred at a speed of 750rmp for 48 hours at room temperature to form a 50wt% cetyltrimethylammonium bromide mixed solution; Sodium lignosulfonate aqueous solution and cetyltrimethylammonium bromide mixed solution with solute mass ratio, that is, the mass ratio of sodium lignosulfonate and cetyltrimethylammonium bromide is the ratio of 2.8:1 Mix to form an anion and cation composite concentrated solution; under the condition of stirring at a rotating speed of 500rmp, 1000g of water is evenly added dropwise into the composite concentrated solution within 30 minutes; Washing, the precipitate after washing is freeze-dried at -48°C to obtain the p...

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Abstract

The invention belongs to the technical field of pesticide-carrying microsphere preparation and discloses a pesticide-carrying microspherical suspending agent prepared by employing a self-assembled lignin base material and a method. The method comprises the following steps of: (1) dissolving the self-assembled lignin base material and a pesticide raw material in an organic solvent, and ultrasonically dispersing the mixture to obtain an organic phase; and (2) under a stirring condition, uniformly adding water into the organic phase, then ultrasonically dispersing the mixture to obtain the pesticide-carrying microspherical suspending agent, wherein the mass ratio of the self-assembled lignin base material and the pesticide raw material is (1-10) to (1-10); the mass ratio of the self-assembled lignin base material and the organic solvent is (0.1-10) to (20-150); and the mass ratio of the self-assembled lignin base material and the water is (0.1-10) to (20-240). The preparation process provided by the invention is simple, and the carrier of the pesticide-carrying microspheres is green and degradable; the pesticide-carrying microspheres can slowly release the pesticide, and can effectively prevent photolysis of the raw pesticide.

Description

technical field [0001] The invention relates to a pesticide-loaded microsphere technology, in particular to a pesticide-loaded microsphere suspension agent and a method for embedding pesticides using a novel self-assembled lignin-based material. Background technique [0002] China is a big country in the production and consumption of pesticides. The use of pesticides not only protects crops and livestock from weeds or pests, but also greatly increases the productivity of animal husbandry. However, in recent years, problems such as food safety and environmental pollution have exposed the huge threat to human beings and nature brought by the excessive and inefficient use of pesticides. The China Pesticide Industry Association issued the "13th Five-Year Development Plan for the Pesticide Industry" and proposed the goal of achieving zero growth in pesticides during the "13th Five-Year Plan" period. The Food Safety Office of the State Council jointly issued the "Opinions on Stre...

Claims

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Application Information

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IPC IPC(8): A01N25/04A01N25/28A01N25/18A01N43/90A01N57/16A01N53/08A01P3/00A01P7/02A01P7/04
CPCA01N25/04A01N25/18A01N25/28A01N43/90A01N53/00A01N57/16
Inventor 邱学青李迎新周明松庞煜霞杨东杰
Owner SOUTH CHINA UNIV OF TECH
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