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Dimethrin microcapsules, preparation method therefor and insectproof preparation

A technology of microcapsules and pyrethroids, applied in the fields of botanical equipment and methods, pesticides, biocides, etc., can solve the problems of damage to human health and ecological protection, unsafe storage, transportation and use, and poor storage stability of preparations. Achieving good controlled release effect, reducing medication frequency and dosage, and good storage stability at room temperature and high temperature

Inactive Publication Date: 2019-07-02
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These dosage forms have various defects, such as poor storage stability of preparations, uncontrollable release, consumption of a large amount of organic solvents, unsafe storage, transportation and use, and low suspension rate, which limits the use
[0008] In addition, in view of people's daily production and living environment, the existing formulations of permethrin are poisonous to the human body and cause damage to human health and ecological protection.

Method used

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  • Dimethrin microcapsules, preparation method therefor and insectproof preparation
  • Dimethrin microcapsules, preparation method therefor and insectproof preparation
  • Dimethrin microcapsules, preparation method therefor and insectproof preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] (1) Prepare 10mmol / L Tris buffer solution and adjust the pH to about 8.5 with 0.5mol / L HCl solution. 60mgSiO 2 The particles were pretreated with 10mmol / LTris buffer solution, centrifuged and redispersed. The treated particles were added to 15mL of 10mmol / L Tris buffer solution, and then 30mg of dopamine was added and stirred for 24 hours. The product was centrifuged, washed with Tris buffer solution and redistilled water, and centrifuged until the supernatant was colorless.

[0051] (2) Add the product obtained in (1) to 2mol / L hydrofluoric acid / 8mol / L ammonium fluoride buffer solution, magnetically stir for 12 hours, remove the template material, and rinse with redistilled water, vacuum at 40°C Dry for 12 hours.

[0052] (3) Add 30 mg of the product obtained in (2) to 45 mL of 10 mg / mL lambda-cyhalothrin dissolved in N,N-dimethylformamide to form a pyrethroid solution, magnetically stir for 24 hours, and centrifuge. And repeatedly washed with double distilled water, the...

Embodiment 2

[0055] (1) Prepare 10mmol / L Tris buffer solution and adjust the pH to about 8.5 with 0.5mol / L HCl solution. 60mgSiO 2 The particles were pretreated with 10mmol / LTris buffer solution, centrifuged and redispersed. The treated particles were added to 15mL of 10mmol / L Tris buffer solution, and then 30mg of dopamine was added and stirred for 24 hours. The product was centrifuged, washed with Tris buffer solution and redistilled water, and centrifuged until the supernatant was colorless.

[0056] (2) Add the product obtained in (1) to 2mol / L hydrofluoric acid / 8mol / L ammonium fluoride buffer solution, magnetically stir for 12 hours, remove the template material, and rinse with redistilled water, vacuum at 40°C Dry for 12 hours.

[0057] (3) Add 30 mg of the product obtained in (2) to 45 mL of 20 mg / mL lambda-cyhalothrin dissolved in N,N-dimethylformamide to form a pyrethroid solution, magnetically stir for 24 hours, and centrifuge. And repeatedly washed with double distilled water, the...

Embodiment 3

[0060] (1) Prepare 10mmol / L Tris buffer solution and adjust the pH to about 8.5 with 0.5mol / L HCl solution. 60mgSiO 2 The particles were pretreated with 10mmol / L Tris buffer solution, centrifuged and redispersed. The treated particles were added to 15mL of 10mmol / L Tris buffer solution, and then 30mg of dopamine was added and stirred for 24 hours. The product was centrifuged, washed with Tris buffer solution and redistilled water, and centrifuged until the supernatant was colorless.

[0061] (2) Add the product obtained in (1) to 2mol / L hydrofluoric acid / 8mol / L ammonium fluoride buffer solution, magnetically stir for 12 hours, remove the template material, and rinse with redistilled water, vacuum at 40°C Dry for 12 hours.

[0062] (3) Add 30 mg of the product obtained in (2) to 45 mL of 30 mg / mL lambda-cyhalothrin dissolved in N,N-dimethylformamide to form a pyrethroid solution, magnetically stir for 24 hours, and centrifuge. And repeatedly washed with double distilled water, th...

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Abstract

The invention discloses dimethrin microcapsules, a preparation method therefor and an insectproof preparation prepared from the dimethrin microcapsules. The microcapsules comprise capsule shells and capsule cores, wherein the capsule shells are prepared from polydopamine, the capsule cores are prepared from dimethrin, the dimethrin comprises one or more of lambda-cyhalothrin, beta-cyfluthrin, biphenthrin and cis-cypermethrin, and the capsule cores are wrapped in the capsule shells. The preparation method disclosed by the invention comprises the steps: (1) providing hollow polydopamine capsuleshells; and (2) providing a dimethrin solution, and enabling the dimethrin solution to enter the capsule shells to form the capsule cores, wherein N,N-dimethylformamide or N-methylformamide serves asa solvent of the solution. According to the dimethrin microcapsules, the preparation method therefor and the insectproof preparation, the chemical stability and released control of dimethrin pesticides are improved, the effect duration is prolonged, toxic or side effects are lowered, and the bioavailability is improved.

Description

Technical field [0001] The invention relates to a pyrethroid microcapsule, a preparation method thereof and an insect-proof preparation obtained by using the pyrethroid microcapsule. Background technique [0002] Lambda-cyhalothrin (Chinese common name, English common name Lambda-Cyhalothrin, CAS: 91465-08-6), the molecular formula is C 23 H 19 ClF 3 NO 3 , The chemical name is 3-(2-chloro-3,3,3-trifluoropropenyl)-2,2-dimethylcyclopropane carboxylic acid α-cyano-3-phenoxybenzyl ester, which is a kind of High-efficiency, broad-spectrum, quick-acting pyrethroid insecticides and acaricides, mainly contact and stomach toxicity, no systemic effect. [0003] Lambda-cyfluthrin (Chinese common name, English common name Beta-Cyfluthrin, CAS: 68359-37-5), molecular formula C 22 H 18 C l2 FNO 3 The chemical name is cyano-(4-fluoro-3-phenoxybenzyl)-methyl-(2,2-dichlorovinyl)-2,2-dimethylcyclopropane carboxylate. It is a synthetic pyrethroid insecticide with contact killing and stomach toxicit...

Claims

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Application Information

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IPC IPC(8): A01N25/28A01N53/06A01N53/08A01P7/04
CPCA01N25/28A01N53/00
Inventor 邹爱华杨颖程家高钱旭红
Owner EAST CHINA UNIV OF SCI & TECH
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