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Edible film preparation method

A food-friendly, film solution technology, applied in flexible coverings, packaging, wrapping paper, etc., can solve problems such as toxic and side effects, achieve food safety, strong mechanical properties and barrier properties, and increase added value

Inactive Publication Date: 2014-04-09
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to data, oxidation is one of the main causes of food spoilage. Adding antioxidants to prepare packaging materials with antioxidant properties has attracted more and more attention, and synthetic antioxidants have certain toxic and side effects.

Method used

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  • Edible film preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation method of the edible film in this embodiment includes the following steps:

[0029] (1) Prepare sunflower seed protein concentrate: add sunflower seed meal powder to distilled water at a material-to-liquid ratio of 1:15 (w / v), magnetically stir for 1 hour, and use 3mol / L NaOH to adjust the pH of the solution to 9,3500r / min After centrifugation for 20 minutes, the residue was extracted once again according to the above steps, the two supernatants were combined, and the pH value of the supernatant was adjusted to the isoelectric point of sunflower seed meal protein with 3mol / L HCl. After magnetic stirring for 30 minutes, there was precipitation, 3500r / Centrifuge for 20 minutes in 1 min, discard the supernatant, wash the precipitate twice with distilled water with a pH of 4.0, and add the precipitate to distilled water to dissolve the protein milk according to the material-to-liquid ratio of 2:1 (w / v). Quality, the pressure of the first homogenization is 2×10...

Embodiment 2

[0032] The preparation method of the edible film in this embodiment includes the following steps:

[0033] (1) Preparation of sunflower seed protein concentrate: add sunflower seed meal powder to distilled water at a material-to-liquid ratio of 1:13 (w / v), magnetically stir for 0.9h, and use 3mol / L NaOH to adjust the pH of the solution to 8.5, 3500r / Centrifuge for 25 min for 25 min, and extract the residue again according to the above steps. Combine the two supernatants. Use 3mol / L HCl to adjust the pH value of the supernatant to the isoelectric point of sunflower meal protein 4.5. Magnetically stir for 35 min. Precipitation occurs, 3500r Centrifuge for 20 minutes per minute, discard the supernatant, wash the precipitate twice with distilled water with a pH of 4.0, and add the precipitate to the distilled water to dissolve the protein milk at a material-to-liquid ratio of 2.2:1 (w / v). Homogenization, the pressure of the first homogenization is 2×10 5 Pa, the pressure of the seco...

Embodiment 3

[0036] The preparation method of the edible film in this embodiment includes the following steps:

[0037] (1) Preparation of sunflower seed protein concentrate: add sunflower seed meal powder to distilled water at a material-to-liquid ratio of 1:17 (w / v), magnetically stir for 1.1h, and use 3mol / L NaOH to adjust the pH of the solution to 9.5, 3500r / Centrifuge the residue for 15 minutes and extract the residue according to the above steps. Combine the two supernatants. Use 3mol / L HCl to adjust the pH value of the supernatant to the isoelectric point of sunflower meal protein 4.5. Magnetically stir for 25 minutes, and there will be precipitation, 3500r Centrifuge for 20 min at / min, discard the supernatant,

[0038] Wash the precipitate twice with distilled water with a pH of 4.0, then add the precipitate to the distilled water to dissolve the protein milk according to the material-to-liquid ratio of 1.5:1 (w / v). After two homogenization, the pressure of the first homogenization is...

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Abstract

The present invention discloses an edible film preparation method, and belongs to the technical field of edible packaging materials. According to the invention, an alkali dissolution and acid precipitation method is adopted to extract sunflower seed protein adopted as an edible film substrate from sunflower seed meal so as to make the sunflower seed meal be completely utilized, substantially increase the added value of the sunflower seed meal, and provide a new approach for comprehensive utilization of the sunflower seed meal, wherein clove oil is a natural antioxidant, and sunflower seed protein-combining phenol compounds such as chlorogenic acid and caffeic acid further have antioxidation activity, such that the antioxidation activity of the edible film can be improved through combination of the clove oil and the phenol compound; the edible film is prepared by adopting the natural raw materials, and has characteristics of simple processing technology, easy operation, low cost, no toxicity and safe eating; and the prepared edible film further has characteristics of strong mechanical property, strong barrier property, and good oxidation resistance.

Description

Technical field [0001] The invention specifically relates to a method for preparing an edible film, belonging to the technical field of edible packaging materials. Background technique [0002] Edible packaging film is a film with a porous network structure formed by natural edible substances such as polysaccharides, proteins, etc. through the interaction of different molecules. It prevents the migration of gases, water vapor, solutes, etc. to maintain food quality and Extend the storage period. Compared with synthetic packaging materials, edible film can be biodegraded, no pollution, and can be used as food flavors, nutrition enhancer, etc. ("Edible Protein Film Research Progress", Yang Kun et al., 2009.7). At present, the raw materials of protein edible films that have been widely studied and reported are soy protein, gluten protein, zein, and collagen. Sunflower seed meal is a by-product of sunflower oil production. It contains a large amount of high-quality protein and a sm...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L89/00C08K5/134C08K5/13C08H1/00B65D65/46
Inventor 张慧芸康怀彬陈俊亮李芳庄军辉郭新宇
Owner HENAN UNIV OF SCI & TECH
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