Preparation method of antibacterial degradable food packaging film material

A food packaging film and slurry technology, which is applied in packaging, wrapping paper, transportation and packaging, etc., can solve the problems of food packaging film environmental pollution, etc., and achieve the effect of excellent antibacterial performance, easy operation and good storage

Inactive Publication Date: 2020-11-20
ZHEJIANG XITAI BIOTECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the current food packaging film is prone to environmental pollution, the present invention proposes a preparation method of an antibacterial and degradable food packaging film material

Method used

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  • Preparation method of antibacterial degradable food packaging film material
  • Preparation method of antibacterial degradable food packaging film material
  • Preparation method of antibacterial degradable food packaging film material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A preparation method of an antibacterial and degradable food packaging film material, comprising the following steps:

[0036] (1) Preparation of carboxylated chitosan (CMCS)

[0037] 5g low molecular weight chitosan is placed in 50mL NaOH-isopropanol solution (6g NaOH is dissolved in 90% isopropanol) for swelling, and is activated by alkali at 40°C for 1h. A solution of 6.5 g of chloroacetic acid dissolved in isopropanol (10 mL) was added dropwise to the separatory funnel. Stir at 40°C for 4h. Precipitate is soaked in 200mL ethanol (80%) for 0.5h, hydrochloric acid adjusts the pH value to 7.0, and the product is washed with absolute ethanol and vacuum-filtered, and vacuum-dried at 60°C to obtain the product carboxylated chitosan (CMCS).

[0038] (2) Preparation of tea polyphenol grafted chitosan composite (TP / CS)

[0039] Dissolve 1g carboxylated chitosan CMCS prepared in step (1) in 1% 100mL acetic acid solution, stir and dissolve at room temperature; weigh 0.25g t...

Embodiment 2

[0043] A preparation method of an antibacterial and degradable food packaging film material, comprising the following steps:

[0044] (1) Preparation of carboxylated chitosan (CMCS)

[0045] 10g of low molecular weight chitosan was swelled in 100mL NaOH-isopropanol solution (13g NaOH dissolved in 90% isopropanol), and activated with alkali at 45°C for 1.5h. A solution of 15 g of chloroacetic acid dissolved in isopropanol (20 mL) was added dropwise to the separatory funnel. Stir at 40°C for 4h. The precipitate was soaked in 200mL ethanol (80%) for 0.5h, the pH value was adjusted to 7.0 with hydrochloric acid, the product was washed with absolute ethanol and vacuum filtered, and vacuum-dried at 60°C to obtain the product carboxylated chitosan (CMCS).

[0046] (2) Preparation of tea polyphenol grafted chitosan composite (TP / CS)

[0047] Dissolve 5g of carboxylated chitosan CMCS prepared in step (1) in 2% 100mL acetic acid solution, stir and dissolve at room temperature; weigh ...

Embodiment 3

[0051] A preparation method of an antibacterial and degradable food packaging film material, comprising the following steps:

[0052] (1) Preparation of carboxylated chitosan (CMCS)

[0053] 1g of low molecular weight chitosan was swelled in 10mL NaOH-isopropanol solution (1.4g NaOH dissolved in 90% isopropanol), and activated with alkali at 40°C for 1h. A solution of 1.5 g of chloroacetic acid dissolved in isopropanol (5 mL) was added dropwise to a separatory funnel. Stir at 40°C for 4h. The precipitate was soaked in 50mL ethanol (80%) for 0.5h, the pH value was adjusted to 7.0 with hydrochloric acid, the product was washed with absolute ethanol and vacuum filtered, and vacuum-dried at 60°C to obtain the product carboxylated chitosan (CMCS).

[0054] (2) Preparation of tea polyphenol grafted chitosan composite (TP / CS)

[0055]Dissolve 1g carboxylated chitosan CMCS prepared in step (1) in 1% 100mL acetic acid solution, stir and dissolve at room temperature; weigh 0.30g tea ...

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Abstract

The invention relates to the technical field of food packaging material preparation, aims to solve the problem that an existing food packaging film is prone to generating environmental pollution, andprovides a preparation method of an antibacterial degradable food packaging film material. The preparation method comprises the following steps: carboxylating a degradable substance chitosan, preparing an antibacterial substance tea polyphenol grafted chitosan, adding sodium alginate, carboxymethyl cellulose and glycerol to obtain forming slurry, and finally casting to form a film, thereby obtaining the antibacterial degradable food packaging film material. The food packaging film has a good tensile property and excellent antibacterial property, is beneficial to food storage, and has a certainpractical application value.

Description

technical field [0001] The invention belongs to the technical field of preparation of food packaging materials, in particular to a method for preparing an antibacterial and degradable food packaging film material. Background technique [0002] At present, plastic packaging materials are widely used in food packaging and fresh-keeping due to their cheap price and stable properties. However, after these plastic packages are used and discarded, they are difficult to degrade and easily cause "white pollution", which poses a serious threat to the environment. It has become a new trend in the development of the food industry and packaging field to use degradable packaging film to replace plastic packaging, reduce the impact on the contents and environmental pollution, and exert its better comprehensive performance. [0003] Biomass materials have broad application prospects in the food field because of their naturalness, safety, and degradability, and they conform to people's pur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L5/08C08L5/04C08L1/28C08K5/053C08B37/08C08J5/18B65D65/46
CPCB65D65/466C08B37/003C08J5/18C08J2305/08C08J2401/28C08J2405/04C08K5/053
Inventor 朱冬祥
Owner ZHEJIANG XITAI BIOTECHNOLOGY CO LTD
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