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Preparation method of hemicellulose based edible film

A hemicellulose modification technology, applied in the fields of plant chemicals and food packaging materials, can solve the problems of poor barrier performance, small elongation, and single variety, and achieve excellent barrier performance, simple preparation, and rich nutrition.

Inactive Publication Date: 2014-07-30
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method of hemicellulose-based edible film, which overcomes the shortcomings of the existing edible film, such as single species, low strength, poor transparency, small elongation, and poor barrier performance. Cellulose / modified hemicellulose is used as an edible film base material, supplemented with other additives, and a hemicellulose-based edible film that meets the packaging requirements of edible food is prepared. The diversified and industrial applications of hemicellulose of great significance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: the preparation method of hemicellulose-based edible film, concrete operation is as follows:

[0026] (1) First add hemicellulose (molecular weight: 20,000) into a container with a heating and stirring device, then add water to it, then stir and dissolve at 70°C and 300rpm, and process for 40 minutes to obtain a hemicellulose hydrolyzate , the mass ratio of water and hemicellulose is 50:1;

[0027] (2) Add granular activated carbon with 15% mass of the hemicellulose hydrolyzate to the hemicellulose hydrolyzate. The particle size of the activated carbon particles is between 1.5 and 3 mm. After reacting for 20 minutes, filter and collect the filtrate;

[0028] (3) Add chitosan with a mass of 0.5% of the filtrate and acetic acid solution with a mass of 0.1% of the filtrate to the filtrate, stir evenly at 300 rpm and dissolve the chitosan completely;

[0029] (4) Add 0.5% of the filtrate quality plasticizer glycerin to the solution prepared in step (3), stir ...

Embodiment 2

[0033] Embodiment 2: the preparation method of hemicellulose-based edible film, concrete operation is as follows:

[0034] (1) First add hemicellulose (molecular weight: 15,000) into a container with a heating and stirring device, and add water to it, then stir and dissolve at 70°C and 500rpm, and process for 30 minutes to obtain a hemicellulose hydrolyzate , the mass ratio of water to hemicellulose is 50:1;

[0035] (2) Add granular activated carbon with 10% mass of the hemicellulose hydrolyzate to the hemicellulose hydrolyzate, the particle size of the activated carbon particles is between 1.5 and 3 mm, react for 30 minutes, filter, and collect the filtrate;

[0036] (3) Add chitosan with a mass of 0.3% of the filtrate and acetic acid solution with a mass of 0.1% of the filtrate to the filtrate, stir evenly at 500rpm and dissolve the chitosan completely;

[0037] (4) Add plasticizer sorbitol of 0.5% of the filtrate quality to the solution prepared in step (3), stir evenly, ...

Embodiment 3

[0041] Embodiment 3: the preparation method of hemicellulose-based edible film, concrete operation is as follows:

[0042] (1) First add acetylated hemicellulose into a container with a heating and stirring device, add 0.08% NaOH solution (mass percentage concentration: 0.2%) of the mass of acetylated hemicellulose, pre-dissolve for 10 minutes, and then add Water, the mass ratio of water to acetylated hemicellulose is 80:1, and then ultrasonicated at 60°C, 400rpm, and ultrasonic conditions (ultrasonic frequency 40kHz, power 120W) for 20min, then stirred, and the treatment time was 10min to obtain hemicellulose Hydrolyzate;

[0043] (2) Add granular activated carbon with 5% mass of the hemicellulose hydrolyzate to the hemicellulose hydrolyzate, the particle size of the activated carbon particles is between 1.5 and 3 mm, react for 25 minutes, filter, and collect the filtrate;

[0044] (3) Add chitosan with a mass of 0.4% of the filtrate and acetic acid solution with a mass of 0.1...

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Abstract

The invention discloses a preparation method of a hemicellulose based edible film. The method includes taking hemicellulose or modified hemicellulose as a base material, adding additives such as an antibacterial agent, a plasticizer and a separator into hydrolysate of the base material, dissolving, mixing evenly, homogenizing, degassing, preparing a film, drying finally, and preparing the edible food packaging film with a certain intensity and water-solubility. The preparation method is simple, easy to industrialize, good in film formation and high in intensity; and the formed film has good separating performance and water resistance, and can satisfy packaging requirements of bread, cakes, fruit and other food.

Description

technical field [0001] The invention belongs to the fields of plant chemical industry and food packaging materials, and in particular relates to a preparation method of a hemicellulose-based edible film. Background technique [0002] In the field of food packaging, compared with other paper and plastic packaging, edible packaging film has unparalleled advantages. It has the characteristics of edible, hygienic, nutritious, environmentally friendly, and convenient. The limitation of traditional technology and formula makes the prepared edible film have some limitations, such as: the large amount of raw materials used for film preparation and the complicated process route make it difficult to popularize and utilize industrially; the prepared film has poor mechanical strength, low barrier performance, Poor heat sealability, low transparency and other reasons lead to a smaller application space and range of edible films, which cannot be produced and utilized on a large scale. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L5/14C08L5/08C08K13/02C08K3/04C08B37/14C08J5/18B65D65/46
CPCY02A40/90Y02W90/10
Inventor 刘玉新王忠良孙兵
Owner KUNMING UNIV OF SCI & TECH
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