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Preparation method for degradable polysaccharide-based hemicellulose composite biomembrane

A technology of hemicellulose and biofilm, which is applied in the field of food packaging and biodegradable materials, can solve the problems of high water vapor permeability and insufficient film tensile strength, and achieve the goal of increasing tensile strength and reducing water vapor permeability Effect

Inactive Publication Date: 2015-01-07
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Then there are also some deficiencies in the existing technology, such as insufficient membrane tensile strength, high water vapor permeability, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Preparation of degradable polysaccharide-based hemicellulose biofilms:

[0019] 1. Weigh k-type carrageenan and guar gum with a mass ratio of 40:60, add deionized water, and stir magnetically at 25°C until a polysaccharide mixture with a mass concentration of 1% is formed.

[0020] 2. Glycerin with a mass concentration of 30% was added to the polysaccharide mixture in step 1, and magnetically stirred at 70°C until a uniform turbid solution was formed.

[0021] 3. Degas the above turbid solution under vacuum to remove air bubbles and dissolved gas in the solution to obtain the degassed turbid solution.

[0022] 4. Take 30 mL of the cloudy solution degassed in step 3 and put it in a polystyrene petri dish, and dry it at 35°C for 16 hours to form a degradable biofilm, which is a degradable polysaccharide-based hemicellulose biofilm.

[0023] The tensile strength of the film is 16.45MPa, the transparency is 5.39%, and the water vapor permeability is 6.31×10 -11 g.(m.s.Pa)...

Embodiment 2

[0025] Preparation of degradable polysaccharide-based hemicellulose biofilms:

[0026] 1. Same as Example 1.

[0027] 2. Add glycerin with a mass concentration of 30% and hemicellulose with a mass concentration of 20% to the polysaccharide mixture in step 1, and magnetically stir at 70°C until a uniform turbid solution is formed.

[0028] 3. Same as Example 1.

[0029] 4. Same as Example 1.

[0030] The tensile strength of the film is 18.30MPa, the transparency is 9.84%, and the water vapor permeability is 7.25×10-11g.(m.s.Pa)-1.

Embodiment 3

[0032] Preparation of degradable polysaccharide-based hemicellulose biofilms:

[0033] 1. Same as Example 1.

[0034] 2. Add glycerol with a mass concentration of 30% and hemicellulose with a mass concentration of 40% to the polysaccharide mixture in step 1, and magnetically stir at 70°C until a uniform turbid solution is formed.

[0035] 3. Same as Example 1.

[0036] 4. Same as Example 1.

[0037] The tensile strength of the film is 19.75MPa, the transparency is 13.78%, and the water vapor permeability is 6.09×10 -11 g.(m.s.Pa) -1 .

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Abstract

The invention discloses a preparation method for a degradable polysaccharide-base hemicellulose composite biomembrane, and belongs to the field of biodegradable materials. The method comprises the following steps: weighing k type carrageen and guar gum as raw materials according to a certain proportion, adding deionized water, sufficiently stirring the raw materials and the deionized water, adding hemicellulose according to a certain proportion, then adding glycerine to stir so as to prepare a uniform turbid liquid, degassing the uniform turbid liquid under a vacuum state, taking and putting an appropriate amount of degassed uniform turbid liquid into a polystyrene culture dish, and drying to obtain the degradable composite biomembrane. Compared with the prior art, a certain amount of the hemicellulose is added, so that the tensile strength and the transparency of the composite membrane can be improved, and the water vapor permeability of the membrane can be reduced.

Description

technical field [0001] The invention relates to the field of biodegradable materials, in particular to a preparation method of a degradable polysaccharide-based hemicellulose composite biofilm, which can be applied to the field of food packaging. Background technique [0002] In recent years, the use of various biopolymers such as polysaccharides, proteins or lipids to prepare biodegradable composite membranes has received great attention. Biodegradable edible composite films can be used to inhibit or regulate the migration of moisture, oxygen, carbon dioxide, aroma, and lipids on both sides of the film, and can also carry food additives to improve the taste of food. Polysaccharide-based composite membranes and their physical properties have received the most extensive research interest. [0003] The synergistic effect between polysaccharides ensures the good miscibility of k-type carrageenan and guar gum. Inexpensive raw materials, simple preparation process, good sealing...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L5/00C08L5/14C08K5/053
Inventor 姚双全覃程荣聂双喜王双飞高聪袁月
Owner GUANGXI UNIV