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Preparation method of eucalyptol emulsion and application of eucalyptol emulsion in biopesticide

A technology of eucalyptol and emulsion, which is applied in the field of emulsion preparation and can solve problems such as the limited range of emulsion proportioning

Active Publication Date: 2021-07-06
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Zhou Hanjun published a method for nanoemulsification of eucalyptus oil (Zhou Hanjun. Eucalyptus essential oil extraction, nanoemulsion and its antibacterial activity research [D]. Central South University of Forestry and Technology, 2016.), but there is a limitation in the range of emulsion preparation The problem is that the oil phase should not exceed 20%, and the water phase should not be less than 60%

Method used

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  • Preparation method of eucalyptol emulsion and application of eucalyptol emulsion in biopesticide
  • Preparation method of eucalyptol emulsion and application of eucalyptol emulsion in biopesticide
  • Preparation method of eucalyptol emulsion and application of eucalyptol emulsion in biopesticide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A method for preparing eucalyptus oil essence emulsion, comprising the steps:

[0049] (1) Add 1.5g of β-cyclodextrin to 98.5g of distilled water, heat and stir in a water bath at 40-60°C, and mix until the liquid is clear and transparent to obtain a cyclodextrin solution with a concentration of 1.5%;

[0050] (2) 20g of eucalyptol was added to the cyclodextrin solution of step (1), and stirred at 50° C. at 300 rpm for 10 min to obtain a mixed solution;

[0051] (3) after 10g of emulsifier polyoxyethylene castor oil 30 and 2.5g of co-emulsifier ethanol are stirred at 50 DEG C, an emulsifier solution is formed; in the mixed solution of step (2), an emulsifier solution and 67.5g of distilled water are added, At 50 ° C, 300 rpm stirring for 20 min for emulsification to obtain eucalyptol emulsion ( figure 1 ).

[0052] The obtained eucalyptol emulsion was tested for stability and dilution performance, and the test results were as follows:

[0053] The eucalyptus olein emul...

Embodiment 2

[0059] Example 2 Gradient optimization of eucalyptus oil dosage

[0060] Adjusting the consumption of eucalyptol in step (2) in Example 1 is 2g, 5g, 10g, 30g, 40g, 50g, 60g, and the content of water in step (3) is adjusted correspondingly, and the maintenance total system quality is 200g, Others are consistent with Example 1 to obtain eucalyptus oil emulsion.

[0061] The obtained emulsion was evaluated for stability and dilution performance, and the test results were as follows:

[0062] The test result of table 2 embodiment 2

[0063]

[0064] As can be seen from Table 2, when the eucalyptol content is too low (<2.5%), the obtained eucalyptol emulsion is unstable and rapidly delaminates, which may be due to the low oil content in the oil phase system, which is not conducive to the inclusion of water. Oil system balance. When the content of eucalyptol is between 2.5% and 25%, the prepared eucalyptol emulsion system is relatively stable, and after being placed at 20, 40,...

Embodiment 3

[0065] Example 3 Gradient optimization of cyclodextrin dosage

[0066] Adjust the amount of cyclodextrin in step (1) in Example 1 to be 0g, 0.5g, 1g, 2g, 2.5g, and adjust the amount of water in this step to maintain the quality of the cyclodextrin solution at 100g, other and Example 1 Keep it consistent and you get a eucalyptus oil emulsion.

[0067] The obtained emulsion was evaluated for stability and dilution performance, and the test results were as follows:

[0068] The test result of table 3 embodiment 3

[0069]

[0070] As can be seen from Table 3, when the cyclodextrin content is too low (<0.5%), the obtained eucalyptol emulsion is unstable and rapidly delaminates, which may be due to the low cyclodextrin content in the system, which is not conducive to the inclusion of water. Oil system balance. When the content of eucalyptol is between 0.5% and 1%, the prepared eucalyptol emulsion system is relatively stable, and it is homogeneous and stable without delaminati...

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Abstract

The invention discloses a preparation method of an eucalyptol emulsion and application of the eucalyptol emulsion in a biopesticide, and belongs to the field of emulsion preparation. The method for preparing the eucalyptol emulsion comprises the following steps of: (1) adding eucalyptol into a cyclodextrin solution, and uniformly mixing to obtain a mixed solution; (2) uniformly mixing an emulsifier and a co-emulsifier to obtain a mixed solution of the emulsifier and the co-emulsifier; (3) adding the mixed solution of the emulsifier and the co-emulsifier in the step (2) and water into the mixed solution in the step (1), and emulsifying to obtain the eucalyptol emulsion. The mass percentages of the substances in the steps (1), (2) and (3) for preparing the eucalyptol emulsion are as follows: cyclodextrin accounts for 0.5%-1%, eucalyptol accounts for 2.5%-25%, the emulsifier accounts for 1.25%-15%, the co-emulsifier accounts for 0.3%-3.75%, water accounts for 55.3%-95.5%, and the sum is 100%. The emulsion prepared by the invention is extremely stable, is not layered after being placed at 20, 40 and 60 DEG C for 30 days, has a good insecticidal effect, and is suitable for the field of biopesticides.

Description

technical field [0001] The invention relates to a preparation method of eucalyptus olein emulsion and its application in biological pesticides, and belongs to the field of emulsion preparation. Background technique [0002] Eucalyptol, also known as 1,8-cineole, is a monoterpenoid, mainly found in volatile oils of eucalyptus, rosemary, galangal and other plants. It has antibacterial, anti-inflammatory, insecticidal, analgesic and other effects. Therefore, it is widely used in medicine, daily chemical, food and other industries. Eucalyptol can be used in combination with other drugs for the treatment of influenza, enteritis, and various infections; it can also be used as a spice for the preparation of perfumes, detergents, toothpaste and other products; in addition, eucalyptol has a cool aroma and can be used as a Food additives are used in chewing gum. In general, eucalyptol is rich in sources, widely used, and has high economic value and development prospects. [0003] H...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N43/90A01N25/04A01P7/04
CPCA01N43/90A01N25/04Y02A50/30A01P1/00A01N43/16
Inventor 王璐潇李兆丰陈双娣李才明全明霞齐彬徐舒简
Owner JIANGNAN UNIV
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