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Microencapsulated strawberry preservative containing eucalyptus leaf extract and preparation method thereof

A technology of microencapsulation and antistaling agent, applied in the field of microencapsulated strawberry antistaling agent and its preparation, to achieve the effects of prolonging the preservation period, benefiting environmental protection, and promoting health

Inactive Publication Date: 2017-02-22
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when eucalyptus essential oil is used for the fresh-keeping practice of strawberries, how to not only have a high yield of eucalyptus essential oil, but also make the obtained eucalyptus essential oil have a broad-spectrum antibacterial effect on strawberries has not been reported yet.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] This embodiment includes the following steps:

[0025](1) Fragmentation of fresh eucalyptus leaves: take fresh blue eucalyptus leaves, eucalyptus eucalyptus leaves, eucalyptus eucalyptus leaves, G9 eucalyptus leaves, eucalyptus spp. Add 2 times (v / m) distilled water to the crushed leaf quality, and set 7000r / min to process for 12min with a high-speed tissue grinder;

[0026] (2) Ultrasonic pretreatment: the eucalyptus leaf slurry is treated with ultrasonic waves, the power is 300w, and the time is 30min;

[0027] (3) Steam distillation: adjust the solid-liquid ratio of the ultrasonically treated eucalyptus slurry to 1:9 (m / v), and steam distill for 5.0 h;

[0028] (4) High-speed centrifugal dehydration of essential oils: collect the distilled essential oils, lower the temperature to 2°C, and dehydrate with high-speed centrifugation at 19000r / min for 7 minutes. The average value of leaf and eucalyptus leaf essential oil yield is 1.62%, 1.75%, 1.71%, 1.69%, 1.65%, 1.70%...

Embodiment 2

[0033] This embodiment includes the following steps:

[0034] (1) Fragmentation of fresh eucalyptus leaves: take fresh blue eucalyptus leaves, eucalyptus eucalyptus leaves, eucalyptus eucalyptus leaves, G9 eucalyptus leaves, eucalyptus spp. Add 3 times (v / m) of distilled water to the crushed leaf quality, and set 7500r / min to process for 11min with a high-speed tissue grinder;

[0035] (2) Ultrasonic pretreatment: the eucalyptus leaf slurry is treated with ultrasonic waves, the power is 350w, and the time is 28min;

[0036] (3) Steam distillation: adjust the solid-liquid ratio of the ultrasonically treated eucalyptus slurry to 1:9 (m / v), and steam distill for 5.5 hours;

[0037] (4) High-speed centrifugal dehydration of essential oils: collect the distilled essential oils, lower the temperature to 2°C, and dehydrate by high-speed centrifugation at 19000r / min for 8 minutes. The average value of leaf and eucalyptus leaf essential oil yield is 1.61%, 1.76%, 1.73%, 1.68%, 1.67%,...

Embodiment 3

[0042] This embodiment includes the following steps:

[0043] (1) Fragmentation of fresh eucalyptus leaves: take fresh blue eucalyptus leaves, eucalyptus eucalyptus leaves, eucalyptus eucalyptus leaves, G9 eucalyptus leaves, eucalyptus spp. Add 3 times (v / m) distilled water to the crushed leaf quality, and set 8000r / min to process for 10min with a high-speed tissue grinder;

[0044] (2) Ultrasonic pretreatment: the eucalyptus leaf slurry is treated with ultrasonic waves, the power is 400w, and the time is 25min;

[0045] (3) Steam distillation: adjust the solid-liquid ratio of the ultrasonically treated eucalyptus slurry to 1:8 (m / v), and steam distill for 6.0 h;

[0046] (4) High-speed centrifugal dehydration of essential oils: collect the distilled essential oils, cool down to 3°C, and dehydrate with high-speed centrifugation at 18000r / min for 9 minutes. The average value of leaf and Eucalyptus macrocephala essential oil yield is respectively 1.61%, 1.74%, 1.72%, 1.69%, 1....

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PUM

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Abstract

The invention discloses a microencapsulated strawberry preservative containing a eucalyptus leaf extract and a preparation method thereof. The main ingredient of the preservative is mixed eucalyptus leaf essential oil. The preparation method comprises the following steps: (1) crushing fresh eucalyptus leaves (eucalyptus leaves for short); (2) carrying out ultrasonic pretreatment on eucalyptus leaf slurry; (3) distilling for 5-7h with water vapor and extracting eucalyptus leaf essential oil; (4) dehydrating eucalyptus leaf essential oil; (5) mixing different types of eucalyptus leaf essential oil at a certain ratio; (6) carrying out complex coacervation by taking the eucalyptus leaf essential oil as core materials and taking gelatin and chitosan as wall materials at a ratio of 1:5-9 (v / m) of the core materials to the wall materials, adding transglutaminase with 0.1%-0.4% (m / m) of gelatin by mass percent for curing, and carrying out low-temperature vacuum drying. The preservative is used for preservation of strawberries in a dosage of 10g of the preservative in 5Kg of strawberries, has obvious preservation effect, no adverse effect to the flavor of the strawberries, good safety and convenience in use.

Description

technical field [0001] The invention relates to a natural fruit fresh-keeping agent and a preparation method thereof, in particular to a microencapsulated strawberry fresh-keeping agent containing eucalyptus leaf extract and a preparation method thereof. Background technique [0002] Strawberry belongs to the Rosaceae Fragaria genus, which is a perennial evergreen herb. Strawberry fruit is bright in color, unique in flavor, rich in nutrition, rich in vitamins, folic acid, phenols and other bioactive components, known as the "Queen of Fruits". However, strawberry is a non-climacteric fruit with a very short post-harvest storage life. Due to the high temperature and rainy season in the harvest season, the fruit has a large water content, a strong metabolism, and is sensitive to fungi, so it is extremely vulnerable to mechanical damage and infection by pathogens. Cause rot, without any fresh-keeping treatment, it can only be stored for 1-2 days at room temperature. In recent ...

Claims

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Application Information

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IPC IPC(8): A23B7/04A23B7/152
CPCA23B7/04A23B7/152
Inventor 龚吉军王挥唐静
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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