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A water-resistant enhanced synergistic anti-oxidation composite film and its preparation method

A composite film and anti-oxidation technology, applied in the field of materials, can solve the problems of poor air permeability, low safety and environmental protection of the film, and high cost of polypeptide anti-oxidation, so as to improve anti-oxidation, strong practicability, and avoid toxicity. Harmful effect

Active Publication Date: 2021-04-06
HUAZHONG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above defects or improvement needs of the prior art, the present invention provides a water-resistant enhanced synergistic anti-oxidation composite film and its preparation method. Technical problems of poor water resistance, mechanical properties and air permeability

Method used

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  • A water-resistant enhanced synergistic anti-oxidation composite film and its preparation method
  • A water-resistant enhanced synergistic anti-oxidation composite film and its preparation method
  • A water-resistant enhanced synergistic anti-oxidation composite film and its preparation method

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preparation example Construction

[0045] The invention proposes a method for preparing a water-resistant enhanced synergistic anti-oxidation composite film, figure 1 For concrete process flow chart, preparation method step is as follows:

[0046] First: take fresh poultry eggs (such as eggs, duck eggs, quail eggs or goose eggs), wash the surface, remove the contents and the egg white adhered to the eggshell membrane and set aside

[0047] Next:

[0048] S1, preparation of eggshell membrane powder and calcium acetate buffer

[0049] taking the membraned eggshell and soaking it in acetic acid until the eggshell and the eggshell membrane are separated to obtain the eggshell membrane and the eggshell acetic acid soaking solution, cleaning the eggshell membrane, drying it, and pulverizing it to obtain eggshell membrane powder;

[0050] Take the eggshell acetic acid soaking solution and stir until the eggshells are completely dissolved, pass through the membrane to remove unreacted macromolecular substances, and obt...

Embodiment 1

[0068] (1) Take the eggshell with membrane and place it in 15% (v / v) acetic acid and soak until the eggshell and eggshell membrane are separated to obtain the eggshell membrane and eggshell acetic acid soaking solution, take the eggshell membrane and dry it after cleaning dried and pulverized to obtain eggshell membrane powder; take the eggshell acetic acid soaking solution and magnetically stir until the eggshell is completely dissolved, pass through the membrane to remove unreacted macromolecular substances, and obtain a calcium acetate buffer solution.

[0069] (2) Take 4g of the eggshell membrane powder collected in step (1) and disperse it in 20ml of deionized water, stir evenly with a magnetic force, put it in a 100ml autoclave with a polytetrafluoroethylene lining, and react at 220°C for 12h After the reaction, the supernatant was centrifuged to remove residues, and after centrifugation, the supernatant was passed through a 0.22 μm filter membrane, placed in a 500 Da dia...

Embodiment 2

[0074] (1) Take the eggshell with film and place it in 17% (v / v) acetic acid and soak until the eggshell and eggshell membrane are separated, obtain the eggshell membrane and eggshell acetic acid soaking solution, take the eggshell membrane and dry it after cleaning dried and pulverized to obtain eggshell membrane powder; take the eggshell acetic acid soaking solution and magnetically stir until the eggshell is completely dissolved, pass through the membrane to remove unreacted macromolecular substances, and obtain a calcium acetate buffer solution.

[0075] (2) Take 2g of the eggshell membrane powder collected in step (1) and disperse it in 20ml of deionized water, stir evenly with a magnetic force, put it in a 100ml autoclave with Teflon lining, and react at 220°C for 20h After the reaction, the supernatant was centrifuged to remove residues, and after centrifugation, the supernatant was passed through a 0.22 μm filter membrane, placed in a 500 Da dialysis bag for dialysis fo...

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Abstract

The invention discloses a water-resistant enhanced synergistic anti-oxidation composite film and a preparation method thereof. The steps are as follows: take a filmed eggshell and soak it in acetic acid until the shell and film are separated to obtain eggshell film powder and calcium acetate buffer solution; Eggshell membrane powder is dispersed in deionized water, and placed in a high-pressure reactor for reaction; after the reaction, the supernatant is centrifuged, filtered, and dialyzed to obtain carbon quantum dot powder; eggshell membrane powder is dispersed in deionized water, enzymatically hydrolyzed, Obtain the enzymatic solution, centrifuge, take the supernatant to freeze-dry, and then use cation exchange chromatography to obtain the antioxidant polypeptide; dissolve chitosan in calcium acetate buffer, add glycerin and stir; add carbon quantum dot powder and polypeptide respectively , ultrasonic; and then either use a 3D printer to print a composite film with good air permeability, or pour it on a disposable petri dish to dry to obtain a composite film. The purpose of the invention is to realize the high value-added utilization of eggshells, and at the same time solve the technical problems of poor mechanical properties and water resistance of the chitosan film.

Description

technical field [0001] The invention belongs to the field of materials, and more specifically relates to a water-resistant enhanced synergistic anti-oxidation composite film and a preparation method thereof. Background technique [0002] Oxidation is an important metabolic process for humans, but at the same time it leads to the formation of free radicals, which are highly unstable, and reactive oxygen species can cause oxidative stress, which is involved in a variety of human diseases, and the application of antioxidants Protects the body from oxidative stress damage. Polypeptides after protein hydrolysis can play a good role in antioxidant, and also have antibacterial activity, immune regulation and other functions, and have been widely used in the fields of cosmetics, food additives and pharmaceuticals. [0003] Studies have found that many peptides from different sources have antioxidant capacity, among which eggshell membrane is an ideal raw material for preparing anti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L5/08C08L89/00C08K5/098C08K3/04C08K5/053C08J5/18C12P21/06C07K1/36C07K1/34C07K1/16C07K1/18
CPCC07K1/16C07K1/18C07K1/34C07K1/36C08J5/18C08J2305/08C08J2489/00C08K3/04C08K5/053C08K5/098C12P21/06
Inventor 黄茜赵前程付星
Owner HUAZHONG AGRI UNIV
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