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A preparation method of organosilicon-containing pesticide microcapsules

A technology of organosilicon and microcapsules, which is applied in the field of preparation of organosilicon-containing pesticide microcapsules, can solve the problems that the spreading performance of microcapsules needs to be further improved, and achieve the effects of improving spreading ability, low surface tension, and easy industrial production

Inactive Publication Date: 2016-04-13
JIANGXI AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the spreading properties of the microcapsules need to be further improved.

Method used

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  • A preparation method of organosilicon-containing pesticide microcapsules
  • A preparation method of organosilicon-containing pesticide microcapsules
  • A preparation method of organosilicon-containing pesticide microcapsules

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The gelatin was formulated into 40 grams of an aqueous solution with a mass ratio concentration of 10%, and 8.0 grams of an organosilicon carboxylate potassium surfactant with a number average molecular weight of 48202, and kept warm at 45° C. for subsequent use. The sodium carboxymethyl cellulose is made into 20 grams of an aqueous solution with a mass ratio concentration of 1.0%, and it is kept warm at 80° C. for subsequent use;

[0027] Add the auxiliary agent to 12.2 grams of permethrin emulsifiable concentrate with a mass ratio concentration of 20%, ultrasonically vibrate at 45°C to make it a uniformly dispersed pesticide suspension, and add it to the above-mentioned gelatin / sodium carboxymethylcellulose / organic silicon carboxylate Potassium acid aqueous solution, disperse at a stirring rate of 500rpm for 30 minutes to obtain an O / W emulsion, and use 20% acetic acid aqueous solution at 45°C to reduce the pH value of the system to 4.5, and slowly lower the temperatur...

Embodiment 2

[0029] The gelatin was made into 32 grams of an aqueous solution with a mass ratio concentration of 10%, and 3.2 grams of an organosilicon sodium carboxylate surfactant with a number average molecular weight of 778, and kept warm at 60° C. for subsequent use. Sodium carboxymethyl cellulose was made into 320 grams of an aqueous solution with a mass ratio concentration of 1.0%, and it was kept warm at 70°C for subsequent use;

[0030] Auxiliary agent and 1.92 grams of carbaryl original drug are added in tetrachlorethylene, ultrasonic vibration makes it become the evenly dispersed pesticide suspension that mass ratio concentration is 10% at 45 ℃, joins above-mentioned gelatin / carboxymethyl fiber Disperse in plain sodium / organosilicon sodium carboxylate aqueous solution for 100 minutes at a stirring rate of 350rpm to obtain an O / W type emulsion. At 45°C, use 10% citric acid aqueous solution to reduce the pH value of the system to 4.5. During stirring, The temperature is slowly low...

Embodiment 3

[0032] The gelatin was formulated into 50 grams of an aqueous solution with a mass ratio concentration of 10%, and 1.0 grams of an organosilicon sodium carboxylate surfactant with a number average molecular weight of 47242, and kept warm at 45° C. for subsequent use. Sodium carboxymethyl cellulose is made into 100 grams of an aqueous solution with a mass ratio concentration of 1.0%, and it is kept warm at 90° C. for subsequent use;

[0033] Add the adjuvant and 70 grams of amecarb original drug into perchlorethylene, and ultrasonically vibrate at 45°C to make it a uniformly dispersed pesticide suspension, and add it to the above-mentioned gelatin / sodium carboxymethylcellulose / organic silicon carboxylic acid Disperse in sodium aqueous solution for 1 minute at a stirring rate of 1000rpm to obtain an O / W emulsion. At 45°C, use 0.05% sulfuric acid aqueous solution to reduce the pH value of the system to 4.5, and slowly lower the temperature to 0°C during stirring. Add 3 ml of 37% ...

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Abstract

The invention discloses a preparation method of a pesticide microcapsule containing organic silicon. The preparation method comprises the following steps: (1) dissolving gelatin and an anion organic silicon surfactant in water with the temperature being 20-60 DEG C; (2) dissolving sodium carboxymethylcellulose in water with the temperature being 70-90 DEG C, and adding the sodium carboxymethylcellulose into a solution obtained in the step (1); (3) adding pesticide suspension liquid, the gelatin, the sodium carboxymethylcellulose and the anion organic silicon surfactant into a solution obtained in the step (2), and stirring and dispersing to obtain an O / W-type emulsion; (4) adding acid and water, performing complex coacervation reaction, cooling, adding a cross-linking agent to cause solidification and cross-linking, and continuously reacting; and (5) adding an alkali solution to adjust the pH value, heating, and reacting. According to the method, the characteristics of high chemical stability and low surface tension of the organic silicon are played, and the plant leaf surface spreading capability of the pesticide microcapsule is improved, so that the utilization rate of pesticides is improved, the duration of the pesticides is prolonged, the environment pollution in the agricultural production process can be reduced, and the agricultural production cost is reduced.

Description

technical field [0001] The invention relates to a method for preparing pesticide microcapsules containing organic silicon, which belongs to the technical field of pesticide microcapsule preparation. Background technique [0002] At present, the main dosage form of pesticides is emulsifiable concentrate, which consumes a large amount of organic solvents, causing environmental pollution and waste of resources. Environmental protection and sustainable development of the society call for the emergence of highly efficient, low-toxic, and pollution-free environmentally friendly pesticides. Pesticide microcapsules have the characteristics of safety, low toxicity, high efficiency, low residue, good environmental compatibility, and long-lasting effect. [0003] Publication No. CN102349509A discloses a preparation method of lignin urea-formaldehyde-based pesticide microcapsules. The method uses modified lignin, formaldehyde and urea as monomers, forms a water-soluble prepolymer under...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N25/28A01N25/30B01J13/10A01N57/14A01N47/22A01N53/08A01N57/16
Inventor 戴润英游胜勇卢丽敏刘倩魏玲黄喜根刘光斌
Owner JIANGXI AGRICULTURAL UNIVERSITY
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