A kind of chitosan-silk fibroin edible film and preparation method thereof

A technology of silk fibroin and chitosan, applied in the field of edible film, can solve the problems of poor moisture resistance, not edible film, easy aging and cracking of the film, etc., achieving good moisture resistance, delaying aging and browning, equipment less dependent effect

Active Publication Date: 2021-07-02
宿迁市江南大学产业技术研究院 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the thesis, only the mechanical properties and antibacterial properties of the blended film were studied, but the food preservation effect was not demonstrated; it is not an edible film; since there is no surfactant or plasticizer added, the pure chitosan solution , The film formed by the blending of silk fibroin solution is easy to age and crack, and has poor moisture resistance

Method used

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  • A kind of chitosan-silk fibroin edible film and preparation method thereof

Examples

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preparation example Construction

[0022] The present invention relates to a kind of preparation method of chitosan-silk fibroin edible film, is characterized in that, comprises the following steps:

[0023] Step S1, preparation of quaternized chitosan solution: dissolving quaternized chitosan in deionized water, stirring at 50-60° C. for 15-30 minutes to form a solution, and then adding mass percent concentration of 1-3% glacial acetic acid, continue to insulate and mechanically stir for 35-45 minutes with a rotating speed of 450-550rpm, and then let it stand to obtain a clear and transparent light yellow quaternized chitosan solution;

[0024] Step S2, preparation of silk fibroin solution: dissolving nano-silk fibroin in deionized water, stirring at 55-65°C for 20-35 minutes to form a solution, and then adding 0.5-1.5% of silk fibroin to the solution Glacial acetic acid, continue to insulate and mechanically stir for 25-35 minutes with a rotating speed of 500rpm, and then let it stand to obtain a silk fibroin...

Embodiment 1

[0032] This example provides a kind of preparation method of chitosan-silk fibroin edible film, is characterized in that, comprises the steps:

[0033] Step S1, preparation of quaternized chitosan solution: Dissolve 10 g of quaternized chitosan in 1 L of deionized water, stir at 50° C. for 15 minutes to form a solution, and then add % of glacial acetic acid 8mL, continue to insulate and mechanically stir for 35 minutes with the rotating speed of 450rpm, leave standstill behind, obtain clear and transparent micro-yellow quaternized chitosan solution;

[0034] Step S2, preparation of silk fibroin solution: dissolve 9 g of nano silk fibroin in 1 L of deionized water, stir at 55° C. for 20 minutes to form a solution, and then add 8 mL of glacial acetic acid with a concentration of 0.5% by mass to the solution , continue to insulate and mechanically stir for 25 minutes with a rotating speed of 500rpm, and then let it stand to obtain a silk fibroin solution;

[0035]Step S3, prepar...

Embodiment 2

[0040] This example provides a kind of chitosan-silk fibroin edible film, and it is basically consistent with example 1, and difference is, the proportioning of quaternized chitosan described in step S1, deionized water, glacial acetic acid 10g: 1.2L: 9mL; the proportioning of nano silk fibroin, deionized water, and glacial acetic acid described in step S2 is 9.5g: 1.1L: 9mL; the quaternized chitosan solution, silk The mass ratio of plain protein solution, glycerol, polyethylene glycol and surfactant is 1:1:0.03:0.03:0.02; Described surfactant is Tween 80; Chitosan-silk fibroin described in step S4, The mass ratio of water and alginic acid is 3:100:0.3.

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Abstract

The invention relates to a preparation method of chitosan-silk fibroin edible film, which is characterized in that it comprises the following steps: step S1, preparation of quaternized chitosan solution; step S2, preparation of silk fibroin solution; Step S3, preparation of chitosan-silk fibroin; step S4, preparation of chitosan-silk fibroin edible film. The invention also discloses a chitosan-silk fibroin edible film prepared according to the preparation method of the chitosan-silk fibroin edible film. The chitosan-silk fibroin edible film disclosed by the invention has good moisture resistance, can effectively delay the aging and browning of fruits and vegetables, inhibit the growth of microorganisms in fruits and vegetables, improve the storage period of fruits and vegetables and maintain their original quality to the greatest extent It is safe to use and environmentally friendly, and has high economic value, social value and ecological value.

Description

technical field [0001] The invention relates to the technical field of edible films, in particular to a chitosan-silk fibroin edible film and a preparation method thereof. Background technique [0002] Fresh fruits and vegetables have high nutritional value and are loved by consumers, but they have a short shelf life at room temperature and are more perishable. With the improvement of people's awareness of green food, how to improve the storage period of fruits and vegetables and maintain their original quality and commodity value to the maximum extent has become one of the focuses of research in the field of food science. [0003] Edible film is the abbreviation of edible fresh-keeping film. Edible film has the characteristics of good fresh-keeping effect, convenient use and good practicability. It is simple in production process, low in cost, edible, easy to degrade, and does not pollute the environment. It is a kind of Food packaging material with great development poten...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L5/08C08L89/00C08L5/04C08L71/02C08K5/053C08J5/18B65D65/46
CPCB65D65/463C08J5/18C08J2305/08C08J2389/00C08J2405/04C08J2405/08C08J2471/02C08J2489/00C08K5/053
Inventor 殷献华钱静张嘉帅孟晶晶
Owner 宿迁市江南大学产业技术研究院
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