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Preparation method of degradable composite pullulan film

A pullulan polysaccharide, completely dissolving technology, applied in the field of preparation of degradable composite pullulan polysaccharide film, can solve the problems of poor softness, insufficient compactness, unable to meet the requirements of packaging film, etc., and achieve high mechanical strength and flexibility. Good results

Active Publication Date: 2018-02-16
LANZHOU CITY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the film made by using pullulan alone is brittle, and the density is not enough and the softness is poor, so it cannot meet the requirements of packaging film

Method used

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  • Preparation method of degradable composite pullulan film
  • Preparation method of degradable composite pullulan film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Example 1: Weigh 2.0 g of pullulan, 1.0 g of glycerol, and 0.5 g of sodium carboxymethyl cellulose, and add 1 g of epoxy soybean oil therein, then add 40 mL of distilled water, and use a magnetic stirrer at a temperature of 20° C. Stir until completely dissolved, and coat a film on a glass plate with a film thickness of 0.15mm, and dry it at 20°C to obtain a film, which is designated as C1.

Embodiment 2

[0011] Example 2: Weigh 3.0g of pullulan, 1.1g of glycerol and 0.6g of sodium carboxymethylcellulose, and add 2g of plasticizer epoxy soybean oil therein, then add 50mL of distilled water, and use Stir with a magnetic stirrer until completely dissolved, coat a film on a glass plate with a film thickness of 0.18mm, and dry at 30°C to obtain a film, which is recorded as C2.

Embodiment 3

[0012] Example 3: Weigh 4.0g of pullulan, 1.2g of glycerol and 0.7g of sodium carboxymethylcellulose, and add 3g of plasticizer epoxy soybean oil therein, then add 60mL of distilled water, and use Stir with a magnetic stirrer until completely dissolved, and coat a film on a glass plate with a film thickness of 0.25mm, and dry it at 40°C to obtain a film, which is recorded as C3.

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Abstract

The invention discloses a preparation method of a degradable composite pullulan film, which belongs to the field of composite materials. This method uses pullulan as raw material, glycerin and sodium carboxymethylcellulose as additives, epoxidized soybean oil as plasticizer, and distilled water as solvent. After stirring at 20-60°C until it is completely dissolved, put it on a glass plate Apply a film and dry to obtain a degradable composite pullulan film. A large number of experiments show that the composite pullulan film prepared by the present invention is a white transparent body, which can be dissolved in water and degraded; it has good flexibility and high mechanical strength, and overcomes the defects of using pullulan alone to make a film. It can completely replace plastic packaging film. Since the edible pullulan is used as the raw material, it is non-toxic, safe, and can be degraded and utilized by microorganisms in nature without causing environmental pollution.

Description

technical field [0001] The invention relates to a preparation method of a degradable composite pullulan film, which belongs to the field of composite materials. Background technique [0002] Traditional plastic packaging materials such as polyethylene, polystyrene, and polyamide cannot be biodegraded, so "white pollution" is becoming more and more serious. Most developed countries have banned or restricted the use of plastic packaging and advocated the use of "green packaging". Therefore, research on the use of edible materials to prepare degradable films with good mechanical properties can replace synthetic packaging films, which will not pollute the environment and have the incomparable advantages of plastic packaging. [0003] Pullulan is an extracellular water-soluble mucopolysaccharide similar to dextran and xanthan gum produced by the fermentation of Aureobasidium pullulans. It is non-toxic, safe, and can be degraded and utilized by microorganisms in nature. cause env...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L5/00C08L1/28C08K5/053C08K5/1515
Inventor 陈洁
Owner LANZHOU CITY UNIV