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Preparation method of plant essential oil mosquito-repellent microcapsule

A technology of plant essential oils and microcapsules, applied in botany equipment and methods, animal repellants, plant growth regulators, etc., can solve the problems of short repellent time and easy volatility, and achieve the effect of improving the sustained release effect

Active Publication Date: 2020-11-10
CHANGZHOU MYSUN BIOLOGICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a preparation method of plant essential oil mosquito repellent microcapsules in order to overcome the problems of the existing plant-derived mosquito repellents that are volatile at room temperature and have a short repelling time.

Method used

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  • Preparation method of plant essential oil mosquito-repellent microcapsule
  • Preparation method of plant essential oil mosquito-repellent microcapsule
  • Preparation method of plant essential oil mosquito-repellent microcapsule

Examples

Experimental program
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Effect test

Embodiment 1

[0028] (1) After fully dissolving sodium alginate with deionized water, adjust the pH to 8 with a NaOH solution with a mass fraction of 10%, and add a mechanical stirring device, N 2 In the four-necked flask of the inlet, thermometer and reflux condensing device, add N-isopropylacrylamide, the mass ratio of sodium alginate to N-isopropylacrylamide is 1:5; 2 After 15 minutes, add the initiator azodicyanovaleric acid, the amount of which accounts for 1% of the mass of N-isopropylacrylamide monomer; under the protection of nitrogen, react at 60°C for 6 hours, add mercaptoacetic acid, whose amount accounts for N- 5% of the mass of isopropylacrylamide monomer; continue to react for 1 hour, after the reaction is completed, cool to room temperature, add absolute ethanol to precipitate the crude product, and dry it in vacuum; extract the crude product with acetone for 24 hours to remove the homopolymer and unreacted monomers, vacuum-dried to a constant amount to obtain carboxyl-termi...

Embodiment 2

[0046] (1) After fully dissolving sodium alginate with deionized water, adjust the pH to 9 with a NaOH solution with a mass fraction of 10%, and add a mechanical stirring device, N 2 Into the four-necked flask of the inlet, thermometer and reflux condensing device, add N-isopropylacrylamide, the mass ratio of sodium alginate to N-isopropylacrylamide is 1:10; 2 After 15 minutes, add the initiator azodicyanovaleric acid, the amount of which accounts for 3% of the mass of N-isopropylacrylamide monomer; under nitrogen protection, react at 75°C for 3 hours, add mercaptoacetic acid, whose amount accounts for N- 10% of the mass of isopropylacrylamide monomer; continue to react for 1 hour, after the reaction is completed, cool to room temperature, add absolute ethanol to precipitate the crude product, and dry it in vacuum; extract the crude product with acetone for 24 hours to remove the homopolymer and unreacted monomers, vacuum-dried to a constant amount to obtain carboxyl-terminat...

Embodiment 3

[0050] (1) After fully dissolving sodium alginate with deionized water, adjust the pH to 8.5 with a NaOH solution with a mass fraction of 10%, and add a mechanical stirring device, N 2 Into the four-necked flask of the inlet, thermometer and reflux condensing device, add N-isopropylacrylamide, the mass ratio of sodium alginate to N-isopropylacrylamide is 1:6; 2After 15 minutes, add the initiator azodicyanovaleric acid, the amount of which accounts for 2% of the mass of N-isopropylacrylamide monomer; under the protection of nitrogen, react at 65°C for 4 hours, add mercaptoacetic acid, whose amount accounts for N- 6% of the mass of isopropylacrylamide monomer; continue to react for 1 hour, after the reaction is completed, cool to room temperature, add absolute ethanol to precipitate the crude product, and dry it in vacuum; extract the crude product with acetone for 24 hours to remove the homopolymer and unreacted monomers, vacuum-dried to a constant amount to obtain carboxyl-ter...

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Abstract

The invention belongs to the field of new materials, and particularly relates to a preparation method of a plant essential oil mosquito repellent microcapsule. According to the method, cyclodextrin modified polyethyleneimine and sodium alginate grafted poly(N-isopropylacrylamide) are used as wall materials, an essential oil compound composed of geranium oil, citronella essential oil and mint essential oil is used as a core material, and the plant essential oil mosquito-repellent microcapsule is prepared by adopting a complex coacervation method. Cyclodextrin has a certain inclusion effect on the core material, so the slow release effect of the core material can be further improved. The obtained microcapsule has an extremely strong repelling effect on aedes albopictus.

Description

technical field [0001] The invention belongs to the field of new materials, and in particular relates to a preparation method of plant essential oil mosquito repelling microcapsules. Background technique [0002] Mosquitoes are important medical vectors distributed around the world, and they are easy to spread a variety of diseases, such as malaria, dengue fever, filariasis, epidemic Japanese encephalitis, yellow fever and West Nile fever, etc., which seriously endanger human health and affect global health. pose a major threat to public health security. [0003] The outbreak time of mosquito-borne infectious diseases is generally in summer and early autumn. From the perspective of current public health, only Japanese encephalitis has a vaccine, and the prevention and treatment of mosquito-borne diseases mainly depends on controlling the number of mosquitoes to cut off the transmission route. The hot spot of mosquito control is to develop new insecticidal chemical repellent...

Claims

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Application Information

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IPC IPC(8): A01N25/28A01N65/44A01P17/00
CPCA01N25/28A01N65/00A01N65/08A01N65/22A01N65/44Y02A50/30
Inventor 彭勇刚纪俊玲汪媛陈海群苏楚清
Owner CHANGZHOU MYSUN BIOLOGICAL MATERIALS
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