Chenopodium ambrosioides volatile oil microcapsule and preparation method thereof

A technology of volatile oil and microcapsules of Nepeta mustard, applied in the directions of botanical equipment and methods, biocides, fungicides, etc., can solve the problems of human and animal safety, short duration of chemical fungicides, etc. Stability and availability, low environmental impact

Inactive Publication Date: 2014-03-26
XINYANG AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems that common chemical fungicides have a short duration of action and are unsafe for humans and animals, the present invention provides a microencapsulation method for the volatile oil of Nepeta nepeta. Long duration

Method used

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  • Chenopodium ambrosioides volatile oil microcapsule and preparation method thereof
  • Chenopodium ambrosioides volatile oil microcapsule and preparation method thereof
  • Chenopodium ambrosioides volatile oil microcapsule and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Accurately weigh 80g of β-cyclodextrin, dissolve in 800mL of distilled water at 60°C, and stir on a magnetic stirrer to obtain an aqueous solution of β-cyclodextrin. Weigh 10mL of Nepeta nepeta volatile oil, dissolve it in 200mL of absolute ethanol, add it dropwise to the aqueous solution of β‐cyclodextrin, stir at 200r / min for 1h at 70°C, and then take it out. After the solution is cooled to 25°C, put it in a refrigerator at 4°C for 24 hours, vacuum filter it, and dry it in a drying oven at 50°C to constant weight to obtain the product;

[0020] For the volatile oil of Schizonepeta, the whole herb of Schizonepeta was taken, dried in the shade, cut into 0.5 cm sections, extracted by steam distillation for 2 hours, and the volatile oil was collected to obtain the volatile oil of Schizonepeta.

Embodiment 2

[0022] Accurately weigh 80g of β-cyclodextrin, dissolve in 650mL of distilled water at 60°C, and stir on a magnetic stirrer to obtain an aqueous solution of β-cyclodextrin. Weigh 10mL of Nepeta nepeta volatile oil, dissolve it in 150mL of absolute ethanol, add it dropwise to the β-cyclodextrin aqueous solution, stir at 200r / min for 1.5h at 70°C, and then take it out. After the solution is cooled to room temperature, put it in a refrigerator at 4°C for 24 hours, vacuum filter it, and dry it in a drying oven at 50°C to constant weight to obtain the product;

[0023] For the volatile oil of Schizonepeta, the whole herb of Schizonepeta was taken, dried in the shade, cut into 0.3 cm segments, extracted by steam distillation for 2 hours, and the volatile oil was collected to obtain the volatile oil of Schizonepeta.

Embodiment 3

[0025] Accurately weigh 90g of β-cyclodextrin, dissolve in 600mL of distilled water at 60°C, and stir on a magnetic stirrer to obtain an aqueous solution of β-cyclodextrin. Weigh 10mL of Nepeta volatile oil, dissolve it in 250mL of absolute ethanol, add dropwise to the β‐cyclodextrin aqueous solution, stir at 200r / min for 1.5h at 60°C, and then take it out. After the solution is cooled to room temperature, put it in a refrigerator at 4°C for 24 hours, vacuum filter it, and dry it in a drying oven at 50°C to constant weight to obtain the product;

[0026] For the volatile oil of Schizonepeta, the whole herb of Schizonepeta was taken, dried in the shade, cut into 0.8 cm sections, extracted by steam distillation for 2 hours, and the volatile oil was collected to obtain the volatile oil of Schizonepeta.

[0027] In order to better verify the practical application effect of the present invention, the following test illustrates the drug effect of the present invention.

[0028] Bac...

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Abstract

The invention discloses a chenopodium ambrosioides volatile oil microcapsule and a preparation method thereof and solves the problem that a conventional chemical bactericide is short in lasting period. A core material of the chenopodium ambrosioides volatile oil microcapsule is chenopodium ambrosioides volatile oil; a wall material is beta-cyclodextrin; the volume-weight ratio of the chenopodium ambrosioides volatile oil to the beta-cyclodextrin is 1 to (6-10). The preparation method comprises the steps of heating distilled water, adding 9-15 percent of the beta-cyclodextrin into the distilled water for dissolving the beta-cyclodextrin, stirring at a constant speed to obtain a beta-cyclodextrin aqueous solution, dissolving the chenopodium ambrosioides volatile oil through absolute ethyl alcohol according to the volume ratio of the chenopodium ambrosioides volatile oil to the absolute ethyl alcohol of 1 to (15-30) to obtain a chenopodium ambrosioides volatile oil and ethyl alcohol solution, gradually dropwise adding the chenopodium ambrosioides volatile oil and ethyl alcohol solution into the beta-cyclodextrin aqueous solution, stirring to obtain a mixed solution, putting the mixed solution into a refrigerator after the mixed solution is cooled, stewing the mixed solution, performing vacuum filtration, and drying the mixed solution until the weight is constant. The chenopodium ambrosioides volatile oil microcapsule has a good packaging effect, has the characteristics of being low in release speed, capable of prolonging of lasting period and safe to human and livestock and has small influence on the environment and non-target organisms.

Description

technical field [0001] The invention belongs to the field of botanical fungicide production, and in particular relates to a microcapsule of plant extract Nepeta nepeta volatile oil and a microencapsulation method. Background technique [0002] Commonly used chemical fungicides often have a short duration and are unsafe for humans, animals and the environment. Screening antifungal active substances from plants is an important direction in the research and development of fungicides. Drawing on the research results of traditional Chinese medicine, it is expected to screen out natural active substances against phytopathogenic fungi from medicinal plants. These active substances can be directly used as natural fungicides with good effect. [0003] Nepeta is a plant belonging to Chenopodiaceae, native to America, and now widely distributed all over the world. The whole herb of Schizonepetae is used as medicine, which has the effects of expelling wind, dehumidification, killing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N65/08A01N25/28A01P3/00
Inventor 陈利军智亚楠周顺玉宁万光肖荣英
Owner XINYANG AGRI & FORESTRY UNIV
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