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Preparation method of oregano essential oil nano-microcapsules

A technology of nano-microcapsules and essential oils, which is applied in the direction of antimicrobial preservation of food ingredients, food shaping, food preservation, etc. It can solve the problems of inconvenient sterilization, reduce fruit and vegetable rot, simplify the preparation process, and prolong the action time. Effect

Inactive Publication Date: 2020-09-04
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, oregano essential oil itself is a volatile liquid, and the irritating smell is obvious when the concentration is high in the environment, so it is inconvenient to apply to sterilization

Method used

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  • Preparation method of oregano essential oil nano-microcapsules
  • Preparation method of oregano essential oil nano-microcapsules
  • Preparation method of oregano essential oil nano-microcapsules

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take 1g of gelatin and 2g of gum arabic, dissolve them separately, and then mix them evenly to prepare a 300 mL 0.5% mixed solution, then add 1.0 g of oregano essential oil to the mixed solution, disperse at a high speed of 1000 r / min for 3 min, and use 10 % glacial acetic acid to adjust the pH to 4.9, continue to stir at 40 °C for 20 minutes, then take it out, then cool it down to about 10 °C with an ice-water bath, adjust the pH to 6.0 with 10% sodium hydroxide, add 0.3 g of curing agent TGase, and stir Solidify for 3 hours, stand and filter with suction to obtain the wet sac product, then spread the wet sac product on a petri dish, pre-cool at -20°C for 24 hours, and then freeze-dry under 1 Pa pressure vacuum condition, the time is not low In 24 h, solid nanocapsules were obtained.

[0026] The newly prepared nano-microcapsules of oregano essential oil had an average particle size of 132±10 nm, an embedding rate of 85.35, and a Zeta potential of -39.6±0.7 mV.

Embodiment 2

[0028] Take 1 g of gelatin and 1 g of gum arabic, dissolve them separately, and then mix them evenly to prepare 200 mL of 0.5% mixed solution, then add 2 g of oregano essential oil to the mixed solution, disperse at a high speed of 1000 r / min for 3 min, and use 10 % glacial acetic acid to adjust the pH to 4.8, continue to stir at 45 °C for 30 min, then take it out, then use an ice-water bath to cool down to about 10 °C, use 10% sodium hydroxide to adjust the pH to 6.0, add 0.4 g of curing agent TGase, and stir Solidify for 3 hours, stand and filter with suction to obtain the wet sac product, then spread the wet sac product on a petri dish, pre-cool at -20°C for 24 hours, and then freeze-dry under 1 Pa pressure vacuum condition, the time is not low In 24 h, solid nanocapsules were obtained.

[0029] The newly prepared nano-microcapsules of oregano essential oil had an average particle size of 125±11 nm, an embedding rate of 88.3%, and a Zeta potential of -42.5±0.6 mV.

Embodiment 3

[0031] Take 2 g of gelatin and 1 g of gum arabic, dissolve them separately, and then mix them evenly to prepare a 300 mL 0.5% mixed solution, then add 6 g of oregano essential oil to the mixed solution, and disperse at a high speed of 1000 r / min for 3 min. Use 10% glacial acetic acid to adjust the pH to 5.0, continue to stir at 50°C for 40 minutes, take it out, then use an ice-water bath to cool down to about 10°C, use 10% sodium hydroxide to adjust the pH to 6.0, and add 0.4 g of curing agent TGase , stirred and solidified for 3 h, stood still and filtered to obtain the wet sac product, and then spread the wet sac product on a petri dish, pre-cooled at -20 ℃ for 24 h, and then freeze-dried under 1 Pa pressure vacuum condition, time Not less than 24 h, to obtain solid nano-microcapsules.

[0032] The newly prepared nano-microcapsules of oregano essential oil had an average particle size of 129±9 nm, an embedding rate of 86.7%, and a Zeta potential of -38.7±0.7 mV.

[0033] A ...

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Abstract

The invention provides a preparation method of oregano essential oil nano-microcapsules. The preparation method of the oregano essential oil nano-microcapsules mainly comprises the following steps: firstly, correspondingly dissolving gelatin and Arabic gum; then uniformly mixing; adding oregano essential oil into a mixed solution and homogenizing; then adjusting the pH (potential of Hydrogen) to be acidic by utilizing 10 percent glacial acetic acid and continually stirring for certain time; then taking out; cooling to about 10 DEG C in an ice-water bath; adjusting the pH to be 6.0 by utilizing10 percent sodium hydroxide; adding glutamine transaminase; continually stirring and curing; standing and filtering to obtain a nano-microcapsule solution; pre-cooling the nano-microcapsule solutionat -20 DEG C for 24h; and then freezing and drying under a pressure vacuum condition of 1Pa for not less than 24h to obtain solid-state nano-microcapsules. According to the preparation method providedby the invention, the oregano essential oil can be slowly released and the acting time of the oregano essential oil is prolonged.

Description

technical field [0001] The invention relates to a preparation method of oregano essential oil nano-microcapsules, belonging to the technical field of food processing. Background technique [0002] Oregano essential oil is a natural plant essential oil made from oregano, a plant of the Labiatae family, through distillation and other methods. Research reports have shown that oregano essential oil can inhibit pathogenic bacteria such as Botrytis cinerea on the surface of fruits and vegetables such as strawberries, pineapples, and cherry tomatoes. But oregano essential oil itself is a volatile liquid, and the irritating smell is obvious when the concentration is high in the environment, so it is inconvenient to apply to sterilization. [0003] Nano-microcapsule technology uses artificially synthesized or natural special materials as the wall material, active substances in three forms of solid, liquid and gas as the core material, and uses the wall material to embed the core mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23B7/154A23P10/30
CPCA23B7/154A23P10/30A23V2002/00A23V2200/10A23V2250/5432A23V2250/5028A23V2250/21A23V2250/022A23V2250/1614A23V2300/10A23V2300/20
Inventor 李富军董路路张新华石泽栋
Owner SHANDONG UNIV OF TECH
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