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Dragon fruit peel edible film and preparation method thereof and application of dragon fruit peel edible film

A technology for pitaya peel and peel, which is applied in the field of pitaya peel edible film and preparation thereof, can solve the problems of complex preparation process, complicated extraction, limited extraction efficiency and the like, and achieves the effects of bright appearance and simple preparation method.

Pending Publication Date: 2020-09-22
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, relevant researches have used the pitaya peel to prepare edible films. The existing problems are: the existing technology is based on the extraction of some components of the peel. On the one hand, the extraction is complicated, the process flow is many, and the extraction efficiency is limited. Cause heat sensitive ingredients such as polyphenols, betalain and other substances loss
In addition, some technologies can directly use pitaya peel, but need to add acid-base glue and other substances, the preparation process is complicated, and it is almost impossible to retain the original bright color of pitaya peel

Method used

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  • Dragon fruit peel edible film and preparation method thereof and application of dragon fruit peel edible film
  • Dragon fruit peel edible film and preparation method thereof and application of dragon fruit peel edible film
  • Dragon fruit peel edible film and preparation method thereof and application of dragon fruit peel edible film

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Select the peel of fresh red-skinned red-fleshed pitaya as raw material, clean it, remove the scales, arrange it into 5cm×15cm peels, and remove the outer waxy layer. The obtained pericarp was beaten at 10,000 rpm at 5°C for 40 seconds to obtain a peel slurry without exocarp; the temperature of the pericarp slurry was controlled to be ≤20°C, and the shearing machine was used to cut at 10,000 rpm for 2 minutes to make the obtained film-forming slurry uniform and fine for subsequent film formation Uniform; put 50g of film-forming slurry upside down on a clean smooth plastic plate, and use a special coating mold to coat it into a raw film embryo with a thickness of 1mm; dry the raw film embryo at a relative humidity of 65%RH and 28°C for 8 hours , peel off the film, can obtain the edible film of dragon fruit peel of color and luster bright red, thickness 0.05mm, water content 12% (betalain content is 42mg / 100g); Product such as figure 1 shown.

[0032] In this embodiment,...

Embodiment 2

[0034] Select the peel of fresh red-skinned red-fleshed pitaya as raw material, clean it, remove the scales, arrange it into 5cm×15cm peels, and remove the outer waxy layer. The obtained peel was beaten at 20000rpm at 10°C for 1min to obtain the peel slurry without the exocarp; 20% by weight deionized water was added; the temperature of the peel slurry was controlled to be less than 20°C, and the shearing machine was used to cut at 15000rpm for 1min so that the obtained The film-forming slurry is even and fine; pour 50g of the film-forming slurry into a clean glass plate frame and shake it for 3 minutes to obtain a uniform and smooth 1mm raw film embryo; An edible film of dragon fruit peel (betalain 30 mg / 100 g) with bright red color, a thickness of 0.03 mm and a water content of 12% was obtained.

[0035] In this example, the edible film was prepared by pouring the film method. Since the peel slurry needs to be diluted with water to a certain concentration, the peel slurry ha...

Embodiment 3

[0037]Select the peel of fresh red-skinned red-fleshed pitaya as raw material, clean it, remove the scales, arrange it into 5cm×15cm peels, and remove the outer waxy layer. The obtained peel was beaten at 8000rpm at 10°C for 2min to obtain a peel slurry without exocarp; add 1.0% glycerin, control the temperature of the peel slurry to ≤20°C, and use a shearer to cut at 25000rpm for 0.5min to make the obtained film-forming slurry Uniform and delicate; pour 30g of film-forming slurry on a smooth glass plate, and use a special coating mold to coat the raw film embryo with a thickness of 0.8mm; the raw film embryo is dried at 25°C for 5 hours and then peeled off to obtain a red color Bright, 0.02mm thick, 10% water content edible film of dragon fruit peel (containing betalain 20mg / 100g)

[0038] This embodiment adopts coating method to make edible film, and edible film keeps the betalain in the pericarp slurry, and color and luster is bright, is suitable as the lining paper such as...

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Abstract

The invention discloses a dragon fruit peel edible film and a preparation method thereof and application of the dragon fruit peel edible film. The preparation method comprises the steps of cleaning updragon fruit peel, removing scales and then finishing the dragon fruit peel into slices, and removing an outer wax layer; pulping the obtained peel at 5000-20000rpm for 0.5-3 min at 0-10 DEG C, performing shearing at 10000-20000rpm for 1-5 min, performing coating or pouring to form a film, performing vacuum drying / air drying, and uncovering the film to obtain the dragon fruit peel edible film. The dragon fruit peel edible film provided by the invention has a simple and convenient preparation method, and has no additives, and the prepared edible film can retain not less than 95% of beet red pigment in the red dragon fruit peel; and the obtained edible film can be used as a colored candy film coating, a preserved fruit individual inner package, a seasoning package, a brewed tea and fruit tea inner package, a soup seasoning package, a fresh-cut fruit and vegetable preservative film and the like.

Description

technical field [0001] The invention belongs to the field of food packaging engineering, and in particular relates to an edible film of pitaya peel and a preparation method thereof. Background technique [0002] With the continuous improvement of people's living standards and the enhancement of public awareness of environmental protection, the efficient and comprehensive utilization of excessive food packaging, degradable packaging materials, and food processing by-products has gradually become a special concern of the public, scientific researchers, food production units, regulatory authorities and even the government. one of the important issues. [0003] Beginning on January 8, 2008, the "Plastic Ban Order" advocated and implemented by the government has gradually become popular and expanded to involve all aspects of daily life. The problem of excessive food packaging has received more attention and attention. Among them, in the packaging of some convenience and snack fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L19/00A23P30/10A23P10/00A23B7/02A23L3/3544B65D65/46
CPCA23L19/09A23P30/10A23P10/00A23B7/02A23L3/3544B65D65/46A23V2002/00A23V2300/10A23V2200/02
Inventor 廖红梅刘元法王国雄宋琰周蕊
Owner JIANGNAN UNIV
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