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A kind of pesticide microcapsule with metal ion chelate of tannic acid as capsule wall and preparation method thereof

A technology of metal ion solution and microcapsules, which is applied in the field of pesticides to achieve the effects of easy access to raw materials, reducing the risk of direct contact with pesticides, and improving tolerance

Active Publication Date: 2016-04-27
SHANDONG AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are no relevant literature and patent reports about the preparation of pesticide microcapsules by metal ion chelates of tannic acid

Method used

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  • A kind of pesticide microcapsule with metal ion chelate of tannic acid as capsule wall and preparation method thereof
  • A kind of pesticide microcapsule with metal ion chelate of tannic acid as capsule wall and preparation method thereof
  • A kind of pesticide microcapsule with metal ion chelate of tannic acid as capsule wall and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Dissolve 10.00g96wt% chlorpyrifos technical substance in 10.00g xylene to make oil phase; dissolve 0.85g alkylphenol polyoxyethylene ether, 1.50g sodium lignosulfonate and 0.20g gum arabic in 60.00g deionized water Prepare the water phase; add the oil phase to the water phase, emulsify at a high speed of 10,000 rpm for 30 seconds, then transfer the emulsion to a three-necked flask, stir at 200 rpm, and pass in nitrogen, at 40-45°C Insulation; first slowly drop (dropping speed 1-2d / s) 1.00g5wt% ferric chloride solution, with an interval of 5 minutes, then slowly drop (dropping speed 1-2d / s) 1.13g14wt% hydrolyzable tannin acid (the structure of the hydrolyzable tannic acid used is shown in figure 1 Shown) solution, with an interval of 5 minutes, which is a cycle, a total of 15 cycles; the obtained microcapsule crude product is centrifuged, washed 3 times with deionized water, and vacuum-dried to obtain hydrolyzable tannic acid- Chlorpyrifos microcapsules with iron ions a...

Embodiment 2

[0032] Dissolve 10.00g95% lambda-cyhalothrin in 10.00g150# solvent oil to make oil phase; dissolve 0.65g alkylphenol polyoxyethylene polyoxypropylene ether, 2.00g NNO and 0.50g polyvinyl alcohol in 45.00 g deionized water to make a water phase; add the oil phase to the water phase, emulsify at a high speed of 10000 rpm for 30 seconds, then transfer the emulsion to a three-necked flask, stir at 200 rpm, and feed nitrogen into the Insulate at 40-45°C; slowly add (dropping speed 1-2d / s) 0.66g 5wt% calcium chloride solution at an interval of 5 minutes, then slowly drop (dropping speed 1-2d / s) 1.00g10wt% hydrolyzable Tannic acid solution, another 5 minutes apart, is a cycle, a total of 14 cycles; the obtained microcapsule crude product is centrifuged, washed 3 times with deionized water, and vacuum-dried to obtain hydrolyzable tannic acid- Beta-cyhalothrin microcapsules with calcium ions as the wall material. The particle size of the pesticide microcapsules prepared in this exampl...

Embodiment 3

[0034] Dissolve 10.00g95% pendimethalin original drug in 15.00g xylene to make oil phase; dissolve 0.45g castor oil ethylene oxide adduct, 2.40g calcium lignosulfonate and 0.20g gum arabic in 70.00 g deionized water to make a water phase; add the oil phase to the water phase, emulsify at a high speed of 10000 rpm for 30 seconds, then transfer the emulsion to a three-necked flask, stir at 200 rpm, and feed nitrogen into the Insulate at 40-45°C; first drop slowly (dropping speed 1-2d / s) 1.00g 4wt% aluminum chloride solution, with an interval of 5 minutes, then slowly drop (dropping speed 1-2d / s) 0.96g16wt% hydrolyzable Tannic acid solution, another 5 minutes apart, is a cycle, a total of 15 cycles; the obtained microcapsule crude product is centrifuged, washed 3 times with deionized water, and vacuum-dried to obtain hydrolyzable tannic acid- Pendimethalin microcapsules with aluminum ions as the wall material. The particle size of the pesticide microcapsules prepared in this exa...

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Abstract

The invention discloses a pesticide microcapsule employing metal ion chelate of tannin as a capsule wall and a preparation method of the pesticide microcapsule, and belongs to the technical field of pesticides. The pesticide microcapsule disclosed by the invention comprises a capsule core and a capsule wall, wherein the pesticide is arranged at the capsule core. The pesticide microcapsule is characterized in that the metal ion chelate of tannin is taken as the capsule wall. The thickness (the thickness of the capsule wall is easy to adjust) of the capsule wall is adjusted by adding different quantities of capsule wall materials according to requirements; a polymer which is formed by the tannin and metal ions after being complexed is relatively easy to degrade on the plant surface or in the soil; complete release of the capsule core can be ensured; waste of the pesticide is avoided; and the pesticide residue caused by too long residual life is avoided. In addition, trace metal ions can be absorbed and utilized by plants, so that plant growth is facilitated. Compared with commonly used in-situ polymerization method and interfacial polymerization method at present, the method disclosed by the invention is available in raw materials, and safe to a producer; and the pesticide microcapsule disclosed by the invention is easy to degrade in an environment, and does not cause new pollution.

Description

technical field [0001] The invention relates to the technical field of pesticides, in particular to a pesticide microcapsule with a metal ion chelate of tannic acid as a capsule wall and a preparation method thereof. Background technique [0002] Pesticides are used to control harmful organisms such as pests, mites, nematodes, pathogenic bacteria, weeds and rodents, and play a very important role in agricultural production. These dosage forms can be directly mixed with water and sprayed on plants. Their disadvantages are that the pesticide exposure to the pesticide workers is large, but it is very complicated to implement sufficient protection for the operators. In addition, due to the encapsulation of capsule wall materials, new characteristics of pesticides are endowed, so people pay more and more attention to pesticide microcapsules. Microcapsules refer to the use of natural or synthetic polymer materials to wrap the capsule core to form microcapsules with a particle siz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N25/28A01N25/08A01N57/16A01N53/08A01N33/18A01N37/26A01P7/04
Inventor 刘峰慕卫张大侠李北兴
Owner SHANDONG AGRICULTURAL UNIVERSITY
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