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Environment-friendly composite material for food packaging and preparation method thereof

A composite material and food packaging technology, which is applied in the field of food packaging, can solve the problems of limiting the scope of use of materials, insufficient mechanical properties of PLA composite materials, etc., to achieve biodegradation, increase the surface area and number of active sites, and good degradability Effect

Active Publication Date: 2022-02-25
旗众科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention directly adds plant fibers and filler mineral powder to PLA composite materials. Although it can effectively reduce the cost of materials, the mechanical properties of the prepared PLA composite materials are not good enough, which limits the scope of use of materials.

Method used

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  • Environment-friendly composite material for food packaging and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] An environmentally friendly composite material for food packaging, consisting of the following raw materials:

[0053] 15 parts by weight of low-density polyethylene, 25 parts by weight of polyvinyl alcohol, 30 parts by weight of polybutylene succinate, 15 parts by weight of nanocellulose, 4 parts by weight of bio-based antibacterial agents, 8 parts by weight of fillers, 3 parts by weight of lubricant.

[0054] The bio-based antibacterial agent is ε-polylysine.

[0055] Described lubricant is six polyglycerol monostearate.

[0056] The filler is nano diamond.

[0057] The preparation method of the environment-friendly composite material used for food packaging comprises the following steps:

[0058] (1) Mix low-density polyethylene, polyvinyl alcohol, polybutylene succinate, nanocellulose and fillers in a high-mixer at a speed of 400 rpm for 5 minutes, and then add biological Base antibacterial agent and lubricant continue to mix 10min, obtain mixed material;

[00...

Embodiment 2

[0062] An environmentally friendly composite material for food packaging, consisting of the following raw materials:

[0063] 15 parts by weight of low-density polyethylene, 25 parts by weight of polyvinyl alcohol, 30 parts by weight of polybutylene succinate, 15 parts by weight of nanocellulose, 4 parts by weight of bio-based antibacterial agents, 8 parts by weight of fillers, 3 parts by weight of lubricant.

[0064] The bio-based antibacterial agent is ε-polylysine.

[0065] Described lubricant is six polyglycerol monostearate.

[0066] The filler is functionalized nano-diamond.

[0067] The preparation method of described functionalized nano-diamond comprises the following steps:

[0068] S1. Add 3 parts by weight of nano-diamonds to 15 parts by weight of 1,6-hexamethylene diisocyanate. Under a nitrogen atmosphere, first stir at 50°C at a speed of 1200rpm for 90min, and then place it under ultrasonic frequency at room temperature. Ultrasonic reaction at 30kHz, ultrasoni...

Embodiment 3

[0075] An environmentally friendly composite material for food packaging, consisting of the following raw materials:

[0076] 15 parts by weight of low-density polyethylene, 25 parts by weight of polyvinyl alcohol, 30 parts by weight of polybutylene succinate, 15 parts by weight of nanocellulose, 4 parts by weight of bio-based antibacterial agents, 8 parts by weight of fillers, 3 parts by weight of lubricant.

[0077] The bio-based antibacterial agent is ε-polylysine.

[0078] Described lubricant is six polyglycerol monostearate.

[0079] The filler is functionalized nano-diamond.

[0080] The preparation method of described functionalized nano-diamond comprises the following steps:

[0081] S1. Put 4 parts by weight of nano-diamonds into 100 parts by weight of 10mmol / L, Tris buffer solution of pH=8.5, ultrasonically disperse for 120min at an ultrasonic frequency of 35kHz and an ultrasonic power of 400W, then add 2 parts by weight of dopamine hydrochloride, at 30 Stirring ...

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Abstract

The invention discloses an environment-friendly composite material for food packaging and a preparation method thereof. The environment-friendly composite material for food packaging is prepared from the following raw materials in parts by weight: 20 to 35 parts of low-density polyethylene, 15 to 30 parts of polyvinyl alcohol, 18 to 25 parts of poly (butylene succinate), 8 to 18 parts of nano cellulose, 3 to 6 parts of bio-based antibacterial agent, 5 to 10 parts of filler and 1 to 4 parts of lubricant. The raw materials are green and environment-friendly, the preparation process is simple, and the prepared environment-friendly composite material for food packaging is safe, non-toxic, excellent in mechanical property and good in degradability and can be widely applied to the fields of food packaging and the like.

Description

technical field [0001] The invention relates to the technical field of food packaging, in particular to an environmentally friendly composite material used for food packaging and a preparation method thereof. Background technique [0002] Food packaging is an important part of the food industry. It has the functions of ensuring food quality and safety, maintaining food quality stability, improving food commercial value, and facilitating storage, transportation and sales. There are various types of food packaging materials, each with its own characteristics. With the continuous development of science and technology and the continuous improvement of people's living standards, petroleum-based low-cost and stable plastic products are widely used. However, most plastic products are difficult to degrade, causing damage to the ecological environment and seriously threatening human survival. [0003] In order to reduce the dependence on petroleum as raw material or derived material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L23/06C08L29/04C08L1/04C08L77/04C08K3/04C08K9/10C08K9/04
CPCC08L67/02C08K2201/011C08L2207/066C08L2201/06C08L23/06C08L29/04C08L1/04C08L77/04C08K3/04C08K9/10C08K9/04C08K9/08
Inventor 李欣莲
Owner 旗众科技有限公司