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A lychee and longan fresh-keeping agent with nano-chitosan as main ingredient and method for preparing same

A technology of nano-chitin and antistaling agent, which is applied in the field of preparation of the antistaling agent, to achieve the effect of easy-to-obtain raw materials and low production cost

Inactive Publication Date: 2006-12-27
BEIHAI PINGTAI NANO MATERIAL APPL RESCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because ordinary chitin is insoluble in water and edible acids, there is no relevant report on its use as a preservative for litchi and longan
In particular, it is prepared into a nanometer state, and then applied to the preservation of litchi and longan. No relevant literature disclosures have been found after searching

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Recipe: 1 kg of nano-chitin, 500 kg of water

[0021] Potassium sorbate 1 kg

[0022] Preparation:

[0023] (1) First take nano-chitin and an equal amount of water and stir until it is evenly paste-like, so as to obtain paste-like nano-chitin for subsequent use;

[0024] (2) Add 100 times the amount of water to the above-mentioned pasty nano-chitin, stir evenly until the nano-chitin is fully and evenly dispersed in the water, and obtain a nano-chitin colloidal solution for later use;

[0025] (3) adding sodium hydroxide solution to the nano-chitin colloidal solution to make the pH value 6.8-7.0, to obtain the nano-chitin neutralizing colloidal solution for subsequent use;

[0026] (4) Get another potassium sorbate and an equal amount of water and stir it to a paste, then add 30 times of water and stir it until the potassium sorbate is fully dispersed in water to obtain a potassium sorbate solution for subsequent use;

[0027] (5) Mix the above-mentioned nano-ch...

Embodiment 2

[0032] Recipe: nano chitin 110 kg water 5500 kg

[0033] Potassium sorbate 5 kg

[0034] The preparation method is the same as in Example 1.

Embodiment 3

[0036] Recipe: nano chitin 12 kg water 1500 kg

[0037] Potassium sorbate 10kg

[0038] The preparation method is the same as in Example 1.

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Abstract

The invention disclose a fresh keeping agent using nano chitin as main material and its preparation method. Fruit husk of longan litchi has three-layer structure, which is in favor of water evaporation, result in fruit dehydration and withered, facilitate forming brown stain, in favor of invasion and propagation of pathogenic microorganism. In the invention nano chitin colloidal solution is prepared, for keeping fresh of litchi and longan under 2-5 DEG C , the fruit can be kept fresh 40-50 days, Moisture of the fruit only reduce 4.8% afeter 40 days, while sugar increase 2%, fruit husk and pulp flavor keep invariable. The material is east to get, and has low cost.

Description

technical field [0001] The invention relates to a preservative for litchi and longan, especially a preservative for litchi and longan mainly composed of nano-chitin, and also relates to a preparation method of the preservative. Background technique [0002] The cultivated area and output of litchi and longan in my country rank first in the world, and they are domestically produced bulk fruits. It is widely welcomed and loved by consumers at home and abroad. [0003] Litchi is a plant of the genus Litchi in the Sapindaceae family. It is the least resistant to storage and transportation among southern fruits. Its peel has a special structure: it consists of three layers: exocarp, mesocarp and endocarp. The exocarp is several layers of closely arranged sclerenchyma cells, covered with an impermeable horny layer; the mesocarp is composed of palisade tissue and spongy tissue, and the spongy layer is thicker, accounting for most of the mesocarp, and conducts the tissue network....

Claims

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Application Information

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IPC IPC(8): A23B7/154
Inventor 林传泰
Owner BEIHAI PINGTAI NANO MATERIAL APPL RESCO
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