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A plant essential oil shell pool nano -microcapsule and its preparation methods and applications

A technology of chitosan nano and plant essential oils, which is applied in the direction of microcapsule preparation, microsphere preparation, essential oils/fragrances, etc., can solve the shortage of plant essential oils, the inability to fully reflect the economic value of plant essential oils, and the low utilization efficiency of plant essential oils, etc. problems, to achieve the effect of improving economic value, overcoming odor stimulation, and prolonging the effect time

Active Publication Date: 2021-04-06
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, there is a corresponding lack of research on improving the stability of plant essential oils, prolonging their efficacy and expanding their uses, making the use of plant essential oils less efficient and unable to fully reflect the economic value of plant essential oils
In addition, no research has reported the use of ionic liquids instead of acetic acid solution for the preparation of nano-microcapsules

Method used

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  • A plant essential oil shell pool nano -microcapsule and its preparation methods and applications
  • A plant essential oil shell pool nano -microcapsule and its preparation methods and applications
  • A plant essential oil shell pool nano -microcapsule and its preparation methods and applications

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Embodiment 1 Preparation of nano-microcapsules

[0047] 1. Preparation of nano-microcapsule materials

[0048] 1. Production and purification of mannose erythritol lipid

[0049] Mannose erythritol lipid was produced by Pseudozyma aphidis DSM70725 (purchased from German Collection of Microorganisms and Cells). The production and purification method of type A mannose erythritol lipid (MEL-A): first inoculate Torulopsis aphids into the activation culture containing 3% yeast extract, 3% malt extract, 10% glucose and 5% peptone Medium, and cultivated at 28°C and 180rpm for 36 hours. After activation, inoculate 1mL of bacterial culture into NaNO 3 3g / L, MgSO 4 ·7H 2 O 0.3g / L, KH 2 PO 4 Seed medium composed of 0.3g / L, yeast extract 1g / L, glucose 40g / L and distilled water. After 2 days of cultivation at 28°C and 180 rpm, the seed culture was centrifuged and washed twice with saline. The resulting cells were inoculated in 80 mL / L soybean oil containing MgSO 4 ·7H 2...

Embodiment 2

[0058] Embodiment 2 Characterization of nano-microcapsules

[0059] 1. Characterization of physical and chemical properties of nano-microcapsules

[0060] Particle size distribution and zeta potential:

[0061] The particle size distribution, dispersion index and zeta potential of the nanocapsules were determined by dynamic light scattering (DLS) at a wavelength of 633 nm adapted to a Zetasizer Nano ZS90 (Malvern Instruments Ltd, Malvern, UK). The temperature was set at 25°C, and the measurement angle was 90°.

[0062] from figure 2 In a, we can see that when the concentration of sodium tripolyphosphate is lower than 0.075%, the particle size of empty nano-microcapsules decreases with the increase of sodium tripolyphosphate concentration, and the minimum is 157.4±2.2nm at 0.075%. When the concentration of sodium tripolyphosphate is further increased, the sample becomes unstable and settles rapidly.

[0063] The concentration of sodium tripolyphosphate was determined to be...

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PUM

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Abstract

The invention discloses a plant essential oil chitosan nano-microcapsule, which comprises a wall material and a core material, the wall material is formed by cross-linking chitosan and a cross-linking agent in an acetic acid aqueous solution or an ionic liquid aqueous solution, and the core material It is plant essential oil and mannose erythritol lipid. The nano-microcapsules prepared by the present invention have better encapsulation efficiency and particle size, can reduce the damage to the active components of essential oils, effectively reduce the volatility of essential oils, improve the photothermal stability of essential oils, and prolong the effective time of the essential oils ; While not destroying the essential oil, the liquid essential oil is stored in a solid form; the preparation process is safe, non-toxic and green; the application range of the plant essential oil is greatly expanded.

Description

technical field [0001] The invention relates to a plant essential oil chitosan nano-microcapsule and a preparation method and application thereof, belonging to the field of biological materials and food additives. Background technique [0002] Plant essential oil, also known as volatile oil or essential oil, is an oily liquid with a unique aromatic smell extracted from plants, which can come from flowers, bracts, leaves, branches, roots, bark, fruits, seeds and resins of herbaceous plants. Generally, it can be obtained by methods such as steam distillation, organic reagent extraction, vacuum fractionation and supercritical extraction. The composition of plant essential oils is very complex, usually with dozens to hundreds of compounds. The chemical composition of plant essential oils is generally divided into four types: terpenoids, aromatic compounds, aliphatic compounds, and nitrogen- and sulfur-containing compounds. Studies have shown that plant essential oils can not o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/02B01J13/14C11B9/00
CPCB01J13/025B01J13/14C11B9/00
Inventor 陈启和吴嘉南牛永武
Owner ZHEJIANG UNIV
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