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A functional edible film based on hemicellulose and chitosan and its preparation method

A technology of hemicellulose and chitosan, applied in the field of functional edible films based on hemicellulose and chitosan and its preparation, can solve problems such as poor mechanical properties, low oxygen permeability, and poor film-forming properties , to achieve high mechanical strength, good application prospects, and good oxygen barrier performance

Active Publication Date: 2021-03-26
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Xylan-type hemicellulose has good biocompatibility and biodegradability, and is a potential membrane material. The membrane has low oxygen permeability, but its film-forming performance is poor, and the water vapor transmission rate High, and poor mechanical properties in high humidity environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Step 1: Prepare chitosan solution: first weigh 1g of acetic acid, add 99ml of deionized water to obtain a 1% acetic acid solution, then accurately weigh 1g of chitosan dissolved in 49g of 1% acetic acid solution , heated and stirred at 45°C until the chitosan was completely dissolved to obtain a clear and transparent chitosan solution with a mass fraction of 2%.

[0021] Step 2: Prepare hemicellulose solution: first weigh 2g of acetic acid, add 98ml of deionized water to obtain a 2% acetic acid solution, then accurately weigh 1g of hemicellulose dissolved in 49g of 2% acetic acid solution , heated and stirred at 60°C until the hemicellulose was almost completely dissolved, and a small amount of undissolved part was removed by centrifugation to obtain a clear and transparent hemicellulose solution with a mass fraction of about 2%.

[0022] Step 3: Preparation of xylo-oligosaccharide solution: put 0.05g of hemicellulose in an autoclave, add 1ml of deionized water, adjust ...

Embodiment 2

[0027] Step 1: Prepare chitosan solution: first weigh 1g of acetic acid, add 99ml of deionized water to obtain a 1% acetic acid solution, then accurately weigh 1g of chitosan dissolved in 49g of 1% acetic acid solution , heated and stirred at 45°C until the chitosan was completely dissolved to obtain a clear and transparent chitosan solution with a mass fraction of 2%.

[0028] Step 2: Prepare hemicellulose solution: first weigh 2g of acetic acid, add 98ml of deionized water to obtain a 2% acetic acid solution, then accurately weigh 1g of hemicellulose dissolved in 49g of 2% acetic acid solution , heated and stirred at 60°C until the hemicellulose was almost completely dissolved, and a small amount of undissolved part was removed by centrifugation to obtain a clear and transparent hemicellulose solution with a mass fraction of about 2%.

[0029]Step 3: Prepare xylooligosaccharide solution: put 0.1g of hemicellulose in a high-pressure reactor, add 2ml of deionized water, adjust...

Embodiment 3

[0034] Step 1: Prepare chitosan solution: first weigh 1g of acetic acid, add 99ml of deionized water to obtain a 1% acetic acid solution, then accurately weigh 1g of chitosan dissolved in 49g of 1% acetic acid solution , heated and stirred at 45°C until the chitosan was completely dissolved to obtain a clear and transparent chitosan solution with a mass fraction of 2%.

[0035] Step 2: Prepare hemicellulose solution: first weigh 2g of acetic acid, add 98ml of deionized water to obtain a 2% acetic acid solution, then accurately weigh 1g of hemicellulose dissolved in 49g of 2% acetic acid solution , heated and stirred at 60°C until the hemicellulose was almost completely dissolved, and a small amount of undissolved part was removed by centrifugation to obtain a clear and transparent hemicellulose solution with a mass fraction of about 2%.

[0036] Step 3: Prepare xylooligosaccharide solution: put 0.15g of hemicellulose in a high-pressure reactor, add 3ml of deionized water, adju...

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Abstract

The invention discloses a method for preparing a functional edible membrane on the basis of hemi-celluloses and chitosan. The method includes (1), mixing the chitosan and acetic acid solution with each other and heating and stirring the chitosan and the acetic acid solution to obtain chitosan solution; (2), mixing the hemi-celluloses and acetic acid solution with one another and heating and stirring the hemi-celluloses and the acetic acid solution to obtain hemi-cellulose solution; (3), preparing xylooligosaccharide solution by the aid of hemi-cellulose acid hydrolysis processes; (4), mixing the hemi-celluloses and the chitosan solution with one another, adding cellulose nanometer fiber solution into the hemi-celluloses and the chitosan solution, adding the xylooligosaccharide solution prepared at the step (3) into mixed liquid, stirring the mixed liquid at the room temperature, removing insoluble impurities by means of centrifuging, and carrying out ultrasonic degassing and standing to obtain composite membrane solution; (5), placing membrane-forming solution in culture vessels, placing the culture vessels in vacuum drying tanks and carrying out drying and membrane-forming. The method has the advantages that the functional edible membrane prepared by the aid of the method is high in mechanical strength and good in oxygen barrier performance, has antibacterial properties, healthcare functions and the like, and has a good application prospect in the aspects such as food packaging and oxidation resistance.

Description

technical field [0001] The invention relates to the technical field of utilization of biomass resources and the field of polymer film materials, in particular to a functional edible film based on hemicellulose and chitosan and a preparation method thereof. Background technique [0002] Most of the packaging materials currently used come from non-renewable resources such as petroleum, and are difficult to degrade, causing serious environmental pollution and some safety problems. Therefore, it is imperative to seek green and environmentally friendly packaging materials. Edible food packaging film is made of natural macromolecular substances such as protein, lipid and polysaccharide as the main raw material. It can be used as a carrier of functional components, such as adding antibacterial agents, antioxidants, nutrients to the film Substances and colorants, etc. Edible food packaging film is favored by people because of its degradability and non-toxicity, and it is an inevit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L5/08C08L1/14B65D65/46
CPCB65D65/463B65D65/466C08J5/18C08J2301/14C08J2305/08
Inventor 孙润仓袁同琦徐吉远文甲龙孙少妮
Owner BEIJING FORESTRY UNIVERSITY
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