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Sargassum polysaccharide food packaging film and preparation method thereof

A technology for Sargassum polysaccharide and food packaging, which is used in packaging, wrapping paper, transportation and packaging, etc., can solve the problems of less research on degradable films, less application and research in the field of plastics, and narrow processing and utilization range, and achieve good results. Membrane properties, increased rate, increased release effect

Inactive Publication Date: 2019-10-08
李光宽
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Degradable food packaging films can be divided into polysaccharides, proteins, microbial copolyesters and composites according to different raw materials. Polysaccharide films are mainly made of different types of polysaccharides (such as starch, chitosan, cellulose) Made of raw materials, the film has good transparency and high strength. At present, starch is more used in the market, and there are few researches on degradable films of other types of polysaccharides. Research on a food packaging film with seaweed polysaccharide as the main raw material has many advantages such as low cost, wide range of raw materials, small resource consumption, safe material, harmless, and degradable
[0003] Sargassum is a type of seaweed in brown algae. It is mainly produced in Guangdong, Guangxi, Hainan Island and other sea coasts. It is rich in resources and has high medicinal value and food value. However, the scope of processing and utilization is narrow. It is mainly used in feed, algae Adhesive and pharmaceutical industries, less application and research in the field of plastics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A preparation method of sargassum polysaccharide food packaging film, comprising the following steps:

[0016] (1) Extraction of Sargassum polysaccharide: Wash the Sargassum purchased in the market, dry it in the sun, crush it through a 60-mesh sieve, add distilled water according to the ratio of solid to liquid 1:80, adjust the pH to 2 with sulfuric acid solution, 70°C, 300W Sonicate at high power for 30 minutes; adjust the pH to 4 with sodium hydroxide solution, add 2% cellulase with an enzyme activity of 15U / mg, enzymolyze at 40°C for 2 hours, boil for 20 minutes to inactivate, centrifuge at 4000r / min for 10 minutes, and take the supernatant Add 70% ethanol for extraction, centrifuge at 4000r / min for 10min, and dry the precipitate at 70°C for 12h to obtain Sargassum polysaccharide, which is set aside;

[0017] (2) Preparation of food packaging film: add sargassum polysaccharide, glycerin, and gelatin to distilled water, the concentrations of which are 0.5%, 1%, and 2...

Embodiment 2

[0019] A preparation method of sargassum polysaccharide food packaging film, comprising the following steps:

[0020] (1) Extraction of Sargassum polysaccharide: wash the Sargassum purchased in the market, dry it in the sun, crush it through a 60-mesh sieve, add distilled water according to the ratio of solid to liquid 1:90, adjust the pH to 3 with sulfuric acid solution, 80°C, 350W Sonicate at high power for 40min; adjust the pH to 5 with sodium hydroxide solution, add 3% cellulase with an enzyme activity of 15U / mg, enzymolyze at 45°C for 2.5h, boil for 20min to inactivate, centrifuge at 4000r / min for 10min, and take the supernatant The solution was extracted by adding ethanol with a concentration of 80%, centrifuged at 4000r / min for 10min, and the precipitate was dried at 70°C for 12h to obtain Sargassum polysaccharide, which was set aside;

[0021] (2) Preparation of food packaging film: add sargassum polysaccharide, glycerin, and gelatin to distilled water, the concentrati...

Embodiment 3

[0023] A preparation method of sargassum polysaccharide food packaging film, comprising the following steps:

[0024] (1) Extraction of Sargassum polysaccharide: wash the Sargassum purchased in the market, dry it in the sun, crush it through a 60-mesh sieve, add distilled water according to the ratio of solid to liquid 1:100, and adjust the pH to 4 with sulfuric acid solution, 90°C, 400W Sonicate at high power for 50min; adjust the pH to 6 with sodium hydroxide solution, add 4% cellulase with an enzyme activity of 15U / mg, enzymolyze at 50°C for 3h, boil for 20min to inactivate, centrifuge at 4000r / min for 10min, and take the supernatant Add ethanol with a concentration of 90% for extraction, centrifuge at 4000r / min for 10min, and dry the sediment at 70°C for 12h to obtain Sargassum polysaccharide, which is set aside;

[0025] (2) Preparation of food packaging film: add sargassum polysaccharide, glycerin, and gelatin to distilled water, the three concentrations are 2.5%, 3%, an...

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Abstract

The invention provides a sargassum polysaccharide food packaging film and a preparation method thereof, and belongs to the technical field of food packaging films. According to the food packaging filmprovided by the invention, sargassum is taken as a raw material, and sargassum polysaccharide is extracted in a combination mode of ultrasonic and enzymolysis, so that the extraction rate of polysaccharide is increased, and extraction efficiency is improved. The sargassum polysaccharide has good water solubility, has high viscosity and solidification capability and is good in film-forming property. Hydrophobic agent glycerol and plasticizer gelatin are added into the formula, so that hydrophilicity of the polysaccharide is reduced, and mechanical properties of the film are improved. The obtained food packaging film has various effects of resisting oxidation, reducing blood fat, resisting radiation, being safe and harmless, being degradable and the like.

Description

technical field [0001] The invention relates to a sargassum polysaccharide food packaging film and a preparation method thereof, belonging to the technical field of food packaging films. Background technique [0002] Degradable food packaging films can be divided into polysaccharides, proteins, microbial copolyesters and composites according to different raw materials. Polysaccharide films are mainly made of different types of polysaccharides (such as starch, chitosan, cellulose) Made of raw materials, the film has good transparency and high strength. At present, starch is more used in the market, and there are few researches on degradable films of other types of polysaccharides. The study of a food packaging film with seaweed polysaccharide as the main raw material has many advantages such as low cost, wide range of raw materials, small resource consumption, safe material, harmless, and degradable. [0003] Sargassum is a type of seaweed in brown algae. It is mainly produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L5/00C08L89/00C08K5/053C08J5/18B65D65/46C08B37/00
CPCB65D65/463C08B37/0003C08J5/18C08J2389/00C08J2405/00C08K5/053
Inventor 李光宽
Owner 李光宽
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