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Film-coating freshness retaining method for grapes

A film-coating and film-preserving technology, which is applied to the preservation of fruits and vegetables, the protection of fruits/vegetables with a coating protective layer, and food preservation, etc. Less investment in equipment, low cost, good effect

Active Publication Date: 2015-04-15
江门市致新包装材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problems that the grape fresh-keeping method in the prior art will cause harm to the human body, has poor safety, and the quality of the grapes after storage is poor, and provides a method that is easy to operate, safe and efficient, low in cost, and can effectively preserve the grape fruit. Good product quality and extended grape shelf-life fresh-keeping method of grape coating film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Preparation of modified nano-SiO 2 : Nano-SiO 2 Adding mass percentage concentration is in the sodium dodecylsulfonate aqueous solution of 0.6%, nanometer SiO 2 The mass ratio to sodium dodecylsulfonate aqueous solution is 1:120, adjust the pH to 4.5, stir for 7 hours, filter, wash with water, and finally dry and grind to obtain modified nano-SiO 2 ,stand-by.

[0022] (2) Prepare composite coating preservative: take the total mass of composite coating preservative as a benchmark, press 0.12% phytic acid, 2.5% pullulan, 0.4% CaCl 2 , 0.03% modified nano-SiO 2 , 0.04% monoglyceride, 0.02% tea polyphenol, and the balance is water. After weighing each component, first add monoglyceride into water and stir evenly, then add modified nano-SiO 2 , after ultrasonic dispersion, add phytic acid and CaCl 2 Stir with tea polyphenols evenly, finally add pullulan polysaccharide, stir evenly, and degas under vacuum for 12 minutes to obtain a composite coating preservative.

...

Embodiment 2

[0026] (1) Preparation of modified nano-SiO 2 : Nano-SiO 2 Add the mass percentage concentration and be in the sodium dodecylsulfonate aqueous solution of 0.7%, nanometer SiO 2 The mass ratio to sodium dodecylsulfonate aqueous solution is 1:150, adjust the pH to 5, stir for 8 hours, filter, wash with water, and finally dry and grind to obtain modified nano-SiO 2 ,stand-by.

[0027] (2) Prepare composite coating preservative: take the total mass of composite coating preservative as a benchmark, press 0.15% phytic acid, 3% pullulan, 0.5% CaCl2 , 0.05% modified nano-SiO 2 , 0.05% monoglyceride, 0.03% tea polyphenol, and the balance is water. After weighing each component, first add monoglyceride into water and stir evenly, then add modified nano-SiO 2 , after ultrasonic dispersion, add phytic acid and CaCl 2 Stir with tea polyphenols evenly, finally add pullulan polysaccharide, stir evenly, and degas under vacuum for 15 minutes to obtain a composite coating preservative.

[...

Embodiment 3

[0031] (1) Preparation of modified nano-SiO 2 : Nano-SiO 2 Adding mass percentage concentration is in the sodium dodecylsulfonate aqueous solution of 0.5%, nanometer SiO 2 The mass ratio to sodium dodecylsulfonate aqueous solution is 1 ∶ 100, adjust the pH to 4, stir for 6 hours, filter, wash with water, and finally dry and grind to obtain modified nano-SiO 2 ,stand-by.

[0032] (2) Prepare the composite coating preservative: take the total mass of the composite coating preservative as a benchmark, press 0.1% phytic acid, 2% pullulan, 0.3% CaCl 2 , 0.01% modified nano-SiO 2 , 0.02% monoglyceride, 0.01% tea polyphenol, and the balance is water. 2 , after ultrasonic dispersion, add phytic acid and CaCl 2 Stir with tea polyphenols evenly, finally add pullulan polysaccharide, stir evenly, and degas under vacuum for 10 minutes to obtain a composite coating preservative.

[0033] (3) Dipping agent film formation: put the grapes in the prepared composite coating preservative a...

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PUM

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Abstract

The invention discloses a film-coating freshness retaining method for grapes, and solves the problems that the freshness retaining method for the grapes in the prior art can injure a human body and is low in safety, and the the stored grapes is poor in quality. The method comprises the steps: (1) preparing modified nano SiO2; (2) preparing a composite film-coating freshness retaining agent; (3) performing infusion to prepare a film; (4) carrying out pre-cooling storage. The freshness retaining method disclosed by the invention is easy to operate, safe, high in efficiency and low in cost; the storage quality of the grapes can be obviously improved, the shelf life of the grapes can be adjusted and prolonged, benefit maximization is realized, and the method is suitable for large-scale popularization and application.

Description

technical field [0001] The invention relates to the technical field of fresh-keeping of fruits and vegetables, in particular to a fresh-keeping method of grape coating. Background technique [0002] Grape is one of the four major fruits in the world. Its fruit ears are gorgeous, sweet and sour, which can not only satisfy people's sensory enjoyment, but also have high nutritional and health value, so it is deeply loved by people. However, grapes have a strong seasonality, and the time to market is relatively concentrated. In addition, the grapes are thin and juicy, and the tissues are delicate, sugary, and high in water. The shelf life of grapes is short under natural conditions, and they are prone to rot, threshing, and Dry stems and other phenomena, especially postharvest microbial diseases, such as gray mold and black rot, will greatly reduce the edible quality and commodity value of grapes. Therefore take effective measures to improve the quality of grape storage, prolon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23B7/16A23B7/157A23B7/154
Inventor 张刚
Owner 江门市致新包装材料有限公司
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