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A kind of method that utilizes fish scale to prepare fresh-keeping film

A technology of fresh-keeping film and fish scales, which is applied in the field of making fresh-keeping films from fish scales, can solve the problems of poor compatibility between collagen and plant essential oils, and achieve the effects of saving enzymatic hydrolysis time, delaying volatilization, and good antibacterial performance

Active Publication Date: 2022-06-21
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of poor compatibility between collagen and plant essential oils, the present invention provides a method for preparing a fresh-keeping film by using fish scales, adding plant essential oils to fish scale collagen films to form a film, which can increase the antibacterial performance of the fresh-keeping film. Non-toxic emulsifier makes the mixture of the two uniform and stable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) The fish scales were washed, dried and broken, soaked in 10 wt% citric acid for 20 h, rinsed with water and soaked in saturated lime water for 10 h. Then, a composite enzyme composed of 0.1 wt% pepsin, 0.03 wt% flavor protease and 0.3 wt% cellulase was used for enzymatic hydrolysis at pH 7 and 50 °C for 4 h. Remove the solvent to get collagen;

[0022] (2) 100 parts by weight of polyethylene glycol, 5 parts by weight of potassium persulfate, 40 parts by weight of allyl glycidyl ether and 10 parts by weight of citric acid were reacted at 100 °C for 5 h to obtain a modified emulsifier. 20 parts by weight of the collagen obtained in step (1), 20 parts by weight of cinnamon essential oil and 10 parts by weight of the above-mentioned modified emulsifier, mixed and stirred well;

[0023] (3) The material mixed in step (2) is fed into a screw extruder, melted and blended, then extruded and granulated, and blown into a film in a film blowing machine to make a fresh-keeping...

Embodiment 2

[0025] (1) The fish scales were washed, dried and broken, soaked in 15 wt% citric acid for 10 h, rinsed with water and soaked in saturated lime water for 20 h. Then, a composite enzyme composed of 0.2 wt% pepsin, 0.06 wt% flavor protease and 0.8 wt% cellulase was used for enzymatic hydrolysis at pH 8 and 60 °C for 3 h. Remove the solvent to get collagen;

[0026] (2) 100 parts by weight of polyethylene glycol, 10 parts by weight of potassium persulfate, 60 parts by weight of bisphenol A epoxy resin, 6 parts by weight of citric acid and 5 parts by weight of glycerol were reacted at 80 °C for 7 h to obtain modification As an emulsifier, 60 parts by weight of collagen obtained in step (1), 5 parts by weight of eucalyptus essential oil and 2 parts by weight of the above-mentioned modified emulsifier are mixed and stirred evenly;

[0027] (3) The material mixed in step (2) is fed into a screw extruder, melted and blended, then extruded and granulated, and blown into a film in a fi...

Embodiment 3

[0029] (1) The fish scales were washed, dried and broken, soaked in 5 wt% citric acid for 15 h, taken out and rinsed with water and then soaked in saturated lime water for 15 h. Then, a composite enzyme composed of 0.15 wt% pepsin, 0.1 wt% flavor protease and 0.5 wt% cellulase was used for enzymatic hydrolysis at pH 8 and 30 °C for 5 h. The enzymatic hydrolysis solution was centrifuged and the supernatant was taken. Remove the solvent to get collagen;

[0030] (2) 100 parts by weight of polyethylene glycol, 8 parts by weight of potassium persulfate, 50 parts by weight of diglycidyl ether, 8 parts by weight of citric acid and 2 parts by weight of glycerol were reacted at 120 °C for 4 h to obtain a modified emulsifier, Mix and stir 80 parts by weight of collagen obtained in step (1), 10 parts by weight of clove essential oil and 5 parts by weight of the above modified emulsifier;

[0031] (3) The material mixed in step (2) is fed into a screw extruder, melted and blended, then ...

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PUM

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Abstract

The invention relates to the technical field of preparation of fresh-keeping film, and aims at the problem of poor compatibility between collagen and plant essential oils, and provides a method for preparing a fresh-keeping film from fish scales, which includes the following steps: (1) washing, drying and crushing the fish scales First decalcify and then enzymatically hydrolyze, centrifuge the enzymolyzed solution, take the supernatant, and remove the solvent to obtain collagen; The modified emulsifier is mixed and stirred; (3) The mixed material is sent into a screw extruder, melted and blended, extruded and granulated, blown into a film in a blown film machine, and made into a fresh-keeping film. Plant essential oils have good antibacterial properties, and compounding with collagen to the plastic wrap can increase the antibacterial properties of the plastic wrap; the modified emulsifier makes the mixture of the two uniform and stable.

Description

technical field [0001] The invention relates to the technical field of preparation of fresh-keeping films, in particular to a method for preparing fresh-keeping films by utilizing fish scales. Background technique [0002] In recent years, the freshwater fish processing industry has developed rapidly with the growth of my country's freshwater fish production, and fish processing has become more and more extensive. However, many freshwater fish processing processes are limited to the utilization of fish muscles, and the processing and utilization of wastes such as fish scales is seldom used. The total amount of waste in the freshwater fish processing industry reaches more than 2 million tons each year, of which fish scales account for about 15%, or 300,000 tons. If it can be used reasonably, it can effectively reduce environmental pollution and improve the efficiency of enterprises. Fish scales are a kind of skin derivative on the surface of fish, accounting for about 2.0%-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L89/00C08L91/00C08K5/053
CPCC08J5/18C08J2389/00C08J2491/00C08K5/053
Inventor 缪文华邱愚蘅丁娇娇胡嘉惠
Owner ZHEJIANG OCEAN UNIV