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Polysaccharide/alcohol soluble protein composite membrane and preparation method thereof

A gliadin and zein technology, applied in the fields of environmental protection and materials, can solve problems such as no product reports, and achieve the effects of good oxygen transmittance and light transmittance, good mechanical properties and barrier properties

Inactive Publication Date: 2015-03-25
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, only Liu Tingjun has studied the application of curdlan and soybean protein on edible films, and there are no reports on other related products.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Weigh 0.8g curdlan gum, add it to 100ml distilled water, add 2.0% sucrose fatty acid ester, stir in 90°C water bath for 3 hours, and obtain curdlan gum hydrosol.

[0017] (2) Weigh 0.2g of wheat prolamin, add it to 20ml of 70% ethanol, add 6.0% glycerin, stir at 25°C for 30min, and obtain a wheat prolamin solution.

[0018] (3) The wheat prolamin solution was slowly added to the rapidly stirred curdlan hydrosol (900 r / min), and the water bath was stirred at 60°C for 30 minutes to fully stir the mixed system to obtain a composite emulsion.

[0019] (4) The composite emulsion was cast into a film, dried at 60°C for 1 hour, then dried at 45°C for 12 hours, and then peeled off; placed at 25°C and 45% relative humidity for 2 hours to equilibrate.

Embodiment 2

[0021] (1) Weigh 0.7g curdlan gum, add it to 100ml distilled water, add 2.0% sucrose fatty acid ester, stir in 90°C water bath for 3 hours, and obtain curdlan gum hydrosol.

[0022] (2) Weigh 0.3 g of zein, add it to 20 ml of 80% ethanol, add 7.0% glycerin, and stir at 25°C for 30 minutes to obtain a zein solution.

[0023] (3) Slowly add the zein solution to the rapidly stirred curdlan hydrosol (900 r / min), and stir rapidly in a 60°C water bath for 40 minutes to fully stir the mixed system to obtain a composite emulsion.

[0024] (4) Cast the composite emulsion into a film, dry it at 50°C for 12 hours, and peel off the film; place it at 25°C and 50% relative humidity for 2 hours to equilibrate.

Embodiment 3

[0026] (1) Weigh 0.3g of curdlan gum, add it into 50ml of distilled water, and stir in a water bath at 90°C for 3 hours to obtain curdlan gum hydrosol.

[0027] (2) Weigh 0.7 g of konjac glucomannan, add it to 50 ml of distilled water, add 1.8% sucrose fatty acid ester, stir in a water bath at 60°C for 2 hours, and obtain konjac glucomannan hydrosol.

[0028] (3) Add curdlan hydrosol to konjac glucomannan hydrosol and mix evenly to obtain a mixed polysaccharide hydrosol.

[0029] (4) Weigh 0.4g of wheat prolamin, add it to 20ml of 70% ethanol, add 8.0% glycerin, stir at 25°C for 30min, and obtain a wheat prolamin solution.

[0030] (5) The wheat prolamin solution was slowly added to the rapidly stirred mixed polysaccharide hydrosol (900 r / min), and stirred rapidly in a 70°C water bath for 30 minutes to fully stir the mixed system to obtain a composite emulsion.

[0031] (6) The composite emulsion was cast into a film, dried at 60°C for 1h, then dried at 40°C for 12h, and then...

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Abstract

The invention discloses a polysaccharide / alcohol soluble protein composite membrane and a preparation method of the polysaccharide / alcohol soluble protein composite membrane. According to the polysaccharide / alcohol soluble protein composite membrane and the preparation method of the polysaccharide / alcohol soluble protein composite membrane, polysaccharide (including curdlan or curdlan / konjac glucomannan mixed polysaccharide) and alcohol soluble protein (including wheat alcohol soluble protein or corn alcohol soluble protein) are taken as raw materials, a plasticizer and an emulgator are taken as auxiliary elements, tape casting and drying are conducted after blending modification is conducted according to a physical method, and then the polysaccharide / alcohol soluble protein composite membrane is obtained. The raw materials of the composite membrane are natural renewable resources and are abundant and easy to obtain. The polysaccharide / alcohol soluble protein composite membrane prepared with the method is flat and smooth, has excellent mechanical property and barrier property and is high in water vapor permeability, oxygen permeability and light transmittance, capable of being degraded naturally and rapidly and free of poison and pollution. The polysaccharide / alcohol soluble protein composite membrane can be used as a food packaging film or a sustained-release material for food or drugs.

Description

technical field [0001] The invention relates to the fields of environmental protection and materials, in particular to a polysaccharide / prolamin composite membrane and a preparation method thereof. Background technique [0002] Edible or fully degradable food packaging materials based on natural polymer substances are ideal materials for food packaging. There have been many reports, such as: a composite film formed by wheat protein and methyl cellulose (patent application number: 200910097730.3), a protein / polysaccharide composite edible film (application number: 201210558612.3), a fresh fruit can Food preservation film (application number: 201310571047.9), zein chitosan composite film (Chinese Journal of Food Science, 2011), etc. Curdlan gum (also known as curdlan) is a microbial exopolysaccharide produced by the fermentation of Alcaligenes faecalis under the condition of limiting nitrogen source. It is insoluble in water, but it is easily dispersed in cold water. When cu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L5/00C08L5/02C08L89/00C08J5/18
Inventor 倪学文姜发堂肖满严文莉黄小波
Owner HUBEI UNIV OF TECH
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