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Lignocellulose-ellagic acid bio-plastic food packaging film and preparation method

A technology of lignocellulose and food packaging film, which is applied in the direction of biological packaging, packaging, wrapping paper, etc., can solve the problems that are not conducive to the preparation of biodegradable plastics, poor thermoplasticity, etc., to improve thermoplastic processing performance, improve barrier performance, improve thermoplastic effect

Inactive Publication Date: 2018-04-20
临沂彩丰包装有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If it is directly blended with resin, it will decompose at high temperature without melting, and the thermoplasticity is poor, which is not conducive to the preparation of biodegradable plastics
However, the conventional means of processing cellulose either use a large amount of chemical plasticizers, or use inefficient means such as ball milling, so it is very necessary to develop a low-cost, safe technical means of modifying cellulose

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A lignocellulose-ellagic acid bioplastic food packaging film and a preparation method thereof, the materials used include: 500g of lignocellulose, 20g of cellulase, 100g of ultraviolet curing acrylate resin, 10g of antibacterial agent; 60% ethanol and 15% oxalic acid group and 25% distilled water mixed with 2000ml of cleaning solution, the temperature of the cleaning solution is 0°C; the concentration is 60% ellagic acid aqueous solution.

[0029] Ferment the lignocellulose with cellulase at a temperature of 30°C for 3 hours; soak the fermented lignocellulose with cleaning solution for 15 minutes, and use mugwort to dehumidify and bake. The temperature is 55°C; the lignocellulose after dehumidification treatment is put into the ellagic acid aqueous solution, and at the same time, UV-curable acrylate resin and antibacterial agent are added and stirred vigorously; the time of the strong stirring is 10 minutes, and the stirring includes horizontal Stirring in the direction...

Embodiment 2

[0032]A lignocellulose-ellagic acid bioplastic food packaging film and a preparation method thereof, the materials used include: 500g of lignocellulose, 15g of cellulase, 90g of ultraviolet curing acrylate resin, 10g of antibacterial agent; 70% ethanol and 15% oxalic acid group and 15% distilled water mixed with 2000ml of cleaning solution, the temperature of the cleaning solution is 0°C; the concentration is 70% ellagic acid aqueous solution.

[0033] Ferment the lignocellulose with cellulase at a temperature of 35°C for 6 hours; soak the fermented lignocellulose with cleaning solution for 15 minutes, and use mugwort to dehumidify and bake. The temperature is 50°C; the lignocellulose after dehumidification treatment is put into the ellagic acid aqueous solution, and at the same time, UV-curable acrylate resin and antibacterial agent are added and vigorously stirred; the time of the strong stirring is 20 minutes, and the stirring includes horizontal Stirring in the direction a...

Embodiment 3

[0036] A lignocellulose-ellagic acid bioplastic food packaging film and its preparation method, the materials used include: 500g of lignocellulose, 12.5g of cellulase, 62.5g of UV-curable acrylate resin, and 10g of antibacterial agent; 83% 2000ml of cleaning solution mixed with ethanol and 10% oxalic acid group and 7% distilled water, the temperature of the cleaning solution is 2°C; the concentration is 85% ellagic acid aqueous solution.

[0037] Ferment the lignocellulose with cellulase at a temperature of 38°C for 12 hours; soak the fermented lignocellulose with cleaning solution for 15 minutes, and use mugwort to dehumidify and bake. The temperature is 55°C; the lignocellulose after dehumidification treatment is put into the ellagic acid aqueous solution, and at the same time, UV-curable acrylate resin and antibacterial agent are added and vigorously stirred; the time of the strong stirring is 15 minutes, and the stirring includes horizontal Stirring in the direction and st...

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Abstract

The invention discloses a lignocellulose-ellagic acid bio-plastic food packaging film and a preparation method. Lignocellulose is preliminarily fermented through cellulase, then an ellagic acid aqueous solution, ultraviolet curable acrylate resin and others are added, intense stirring is conducted, a panel is evenly coated with materials, and a film is formed through curing with ultraviolet irradiation. The lignocellulose is modified with ellagic acid, the function of hydrogen bonds is greatly weakened, the degree of crystallinity is decreased, and the crystal structure of cellulose is changed. The lignocellulose-ellagic acid bio-plastic food packaging film and the preparation method have the beneficial effects that the thermoplastic processing performance of celluloses is greatly improved, meanwhile, the thermal stability is ensured, a plasticizer does not need to be used, the safety of the film making contact with food is ensured, and the lignocellulose-ellagic acid bio-plastic foodpackaging film and the preparation method have the great advantages compared with traditional processes; and the ellagic acid is further used as a free radical collecting addition agent, and the barrier property is improved.

Description

technical field [0001] The invention relates to the field of food packaging films, in particular to degradable food packaging films, in particular to a lignocellulose-ellagic acid bioplastic food packaging film and a preparation method thereof. Background technique [0002] Food packaging film refers to a film container that is in direct contact with food and is used to hold and protect food. Food packaging film should be produced with food-grade plastic film, usually a composite material packaging bag with more than two layers. Food packaging film can be divided into: ordinary food packaging film, vacuum food packaging film, inflatable food packaging film, boiled food packaging film, steamed food packaging film and functional food packaging film according to its application range. The shell can separate food from oxygen, water vapor, stains, etc. Leakage prevention is also a necessary factor in packaging design. Some packages include desiccants or deoxidizers to extend she...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65D65/40B65D65/46
CPCB65D65/40B65D65/466Y02A40/90Y02W90/10
Inventor 陈庆昝航
Owner 临沂彩丰包装有限公司
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