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Starch-fatty acid composite biofilm and preparation method thereof

A fatty acid and biofilm technology, which is applied in the field of starch-fatty acid composite biofilm and its preparation, can solve the problems of reducing the tensile strength and elongation at break of starch film, poor film structure uniformity and the like

Pending Publication Date: 2021-11-26
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of fatty acids reduces the tensile strength and elongation at break of the starch film, fatty acids will make the overall structure of the film less uniform, and weaker regions appear in the polymer matrix
[0004] Therefore, the current starch-fatty acid composite biofilm still needs to be improved

Method used

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  • Starch-fatty acid composite biofilm and preparation method thereof
  • Starch-fatty acid composite biofilm and preparation method thereof
  • Starch-fatty acid composite biofilm and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In this embodiment, prepare potato starch-myristic acid composite biofilm according to the following methods:

[0026] (1) Preparation of potato starch-myristic acid complex

[0027] Weigh potato starch and add it to distilled water at a ratio of 5% (w / v), heat and stir at 75°C for gelatinization for 20 minutes, add 2.5% (w / w) of potato starch dry weight myristic acid at 75°C Continue heating and stirring for 10 min to prepare potato starch-myristic acid complex. Put the compound into a high-pressure bag, the high-pressure parameters are pressure: 200 MPa, and the time is 30 min, and the normal pressure condition of 0.1 MPa is used as the control.

[0028] (2) Preparation of potato starch-myristic acid composite edible film

[0029] Weigh 50 g of the above potato starch-myristic acid complex, add 30% (w / w) glycerin to it, stir for 15 min to prepare a film-forming solution, and pour 30 g of the film-forming solution into a 90×90 mm petri dish, The composite film was o...

Embodiment 2

[0031] In this embodiment, prepare potato starch-lauric acid composite biofilm according to the following methods:

[0032] (1) Preparation of potato starch-lauric acid complex

[0033] Weigh potato starch and add it to distilled water at a ratio of 5% (w / v), heat and stir at 75°C for gelatinization for 20 minutes, add 2.5% (w / w) of potato starch dry weight lauric acid at 75°C Continue heating and stirring for 10 min to obtain the potato starch-lauric acid complex. Put the compound into a high-pressure bag, the high-pressure parameters are pressure: 300 MPa, and the time is 20 minutes, and the normal pressure condition of 0.1 MPa is used as a control.

[0034] (2) Preparation of potato starch-lauric acid composite edible film

[0035] Weigh 50 g of the above-mentioned potato starch-lauric acid complex, add 30% (w / w) glycerin to it, stir for 15 min to prepare a film-forming solution, and pour 30 g of the film-forming solution into a 90×90 mm Petri dish, The composite film wa...

Embodiment 3

[0037] In this embodiment, the potato starch-palmitic acid composite biofilm is prepared according to the following method:

[0038] (1) Preparation of potato starch-palmitic acid complex

[0039] Weigh potato starch and add it to distilled water at a ratio of 5% (w / v), heat and stir at 75°C for gelatinization for 20 minutes, add 2.5% (w / w) palmitic acid of the dry weight of potato starch to it at 75°C Continue heating and stirring for 10 min to obtain potato starch-palmitic acid complex. Put the compound into a high-pressure bag, the high-pressure parameters are pressure: 400 MPa, and the time is 30 minutes, and the normal pressure condition of 0.1 MPa is used as a control.

[0040] (2) Preparation of potato starch-palmitic acid composite edible film

[0041] Weigh 50 g of the above potato starch-palmitic acid complex, add 30% (w / w) sorbitol to it, stir for 15 min to prepare a film-forming solution, and pour 30 g of the film-forming solution into a 90×90 mm petri dish, The...

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Abstract

The invention provides a starch-fatty acid composite biofilm and a method for preparing the starch-fatty acid composite biofilm, and the method comprises the following steps: mixing starch and water, and carrying out first heating treatment to obtain a first heating product; performing second heating treatment on the first heating product and fatty acid to obtain a second heating product; performing high-pressure treatment on the second heating product to obtain a starch-fatty acid compound; and mixing the starch-fatty acid compound with a plasticizer, and drying to obtain the starch-fatty acid composite biofilm. The starch-fatty acid composite biofilm obtained by the preparation method disclosed by the invention is compact in structure, relatively high in flexibility, ductility, tensile strength, hydrophobicity and elongation at break, and good in application prospect.

Description

technical field [0001] The invention relates to the field of food. Specifically, the present invention relates to a starch-fatty acid composite biofilm and a preparation method thereof. Background technique [0002] Starch is considered to be one of the most promising natural biodegradable materials. However, natural starch-based materials have problems such as poor mechanical properties, poor barrier properties, and easy solubility in water. It is difficult to meet the requirements of food packaging, which limits its application range. Compared with native starch, packaging materials made of modified starch have better mechanical, barrier and thermal properties. [0003] Starch granules can form starch-lipid complexes with lipid complexes such as fatty acids, thereby rearranging starch molecular chains, better maintaining the spatial network structure of starch gels, inhibiting starch recrystallization, and delaying the aging process of starch , while improving the film-f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L3/02C08K5/09
CPCC08J5/18C08J2303/02C08K5/09
Inventor 吴晓蒙刘英娴廖小军
Owner CHINA AGRI UNIV
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