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PLA/PBF/POE-g-GMA/ZnO composite material for antibacterial food packaging, and preparation method thereof

A composite material and food packaging technology, applied in the field of PLA/PBF/POE-g-GMA/ZnO composite materials and preparation, can solve the problems of destroying sustainable utilization of land resources, destroying marine ecological balance, limited antibacterial performance, etc. Excellent mechanical properties, significant antibacterial effect, enhanced gas barrier properties

Active Publication Date: 2021-12-31
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the field of food packaging, most food packaging materials have limited antibacterial properties and are difficult to degrade. Landfilling in the soil seriously damages the sustainable use of land resources, and dumping in the ocean destroys the ecological balance of the ocean.

Method used

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  • PLA/PBF/POE-g-GMA/ZnO composite material for antibacterial food packaging, and preparation method thereof
  • PLA/PBF/POE-g-GMA/ZnO composite material for antibacterial food packaging, and preparation method thereof
  • PLA/PBF/POE-g-GMA/ZnO composite material for antibacterial food packaging, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044]A preparation method for a PLA / PBF / POE-g-GMA / ZnO composite film for antibacterial food packaging, comprising the following steps:

[0045] 1. Preparation of modified nano zinc oxide

[0046] (a) Evenly disperse 10 g of nano zinc oxide in 100 mL of absolute ethanol solvent, oscillate ultrasonically for about 15 min, reflux at 40° C. for 1 h, and then ultrasonically disperse for 20 min.

[0047] (b) Add appropriate amount of water, then use 0.1mol / L HCl solution to adjust pH=2, then reflux at 40°C for 1 hour, then add hexadecyltrimethoxysilane (HDTMS) dropwise into the flask, stir and reflux at 40°C After about 1 hour, the pH was adjusted to 10 with NaOH, and the product was refluxed at 40° C. for 2 hours to obtain the refluxed product.

[0048] (c) Centrifuge the reflux product for 5 minutes after taking it out, remove the supernatant, take the centrifuged product and place it in a polytetrafluoroethylene mold, and dry it in an oven at 80°C overnight to obtain the modifi...

Embodiment 2

[0060] A preparation method of PLA / PBF / POE-g-GMA / ZnO composite film for antibacterial food packaging is basically the same as in Example 1, except that in the modified nano-zinc oxide obtained in step 1, The content of HDTMS is 2.5 wt%.

Embodiment 3

[0062] A preparation method of PLA / PBF / POE-g-GMA / ZnO composite film for antibacterial food packaging is basically the same as in Example 1, except that in the modified nano-zinc oxide obtained in step 1, The content of HDTMS was 7.5 wt%.

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Abstract

The invention relates to the field of polymer composite materials and food packaging materials, and especially relates to an antibacterial food packaging composite material, and a preparation method and application thereof. The preparation method comprises the following steps: (1) modifying nano zinc oxide by using a silane coupling agent; (2) mixing the modified nano zinc oxide with PLA through a master batch method to obtain a master batch; and (3) uniformly mixing the PLA, PBF, POE-g-GMA and the master batch through a melt blending method to prepare the PLA / PBF / POE-g-GMA / ZnO composite material. Meanwhile, the prepared PLA / PBF / POE-g-GMA / ZnO composite material can be pressed into a thin film by a vacuum film pressing machine, and the thin film is used for antibacterial food packaging. The prepared composite material has excellent mechanical properties, and a composite film prepared from the composite material has an excellent antibacterial effect, especially has an excellent fresh-keeping effect when being used for packaging broccoli, and is expected to become a biodegradable food packaging material which is low in cost, simple to prepare and good in performance.

Description

technical field [0001] The invention belongs to the field of polymer composite materials and food packaging materials, and in particular relates to a PLA / PBF / POE-g-GMA / ZnO composite material for antibacterial food packaging, a preparation method and an application thereof. Background technique [0002] The plastics produced by the domestic prior art are all made of petrochemical products such as polyethylene, polyvinyl chloride, polypropylene and polyvinyl alcohol as raw materials. Due to the non-degradation of the product, "white pollution" is caused. And with the shortage of oil, the price of oil has risen again and again, and the price of plastics produced by petrochemicals has also risen again and again. Polylactic acid (PLA) is polymerized from lactic acid obtained by fermenting starch extracted from corn and other plants. It is a bio-based source and can be completely biodegradable bioplastics. The macromolecular skeleton structure of discarded polylactic acid materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02C08L51/06C08K9/06C08K3/22C08J5/18
CPCC08J5/18C08J2367/04C08J2467/02C08J2451/06C08K9/06C08K2201/011C08K2003/2296Y02W90/10
Inventor 刘文涛袁梦杰陈鸿燕鹿孟张陈金周何素芹刘浩黄淼铭
Owner ZHENGZHOU UNIV