High-efficiency visible light antibacterial fresh-keeping plastic packaging material and preparation method thereof

A plastic packaging, visible light technology, used in packaging, wrapping paper, transportation and packaging, etc., can solve the problems of affecting photocatalytic activity, poor chemical stability, no stability, etc., to achieve antibacterial preservation and removal of ethylene gas, affinity Good performance, stable and efficient visible light absorption effect

Active Publication Date: 2015-01-28
YANGZHOU MINGSHENG NEW TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the one hand, doping and sensitizing modification of titanium dioxide also lead to the formation of new recombination centers, thereby affecting its photocatalytic activity; on the other hand, modified titanium dioxide generally has the characteristics of poor chemical stability and easy failure.
In addition, in order to obtain anatase titanium dioxide with high photo

Method used

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  • High-efficiency visible light antibacterial fresh-keeping plastic packaging material and preparation method thereof
  • High-efficiency visible light antibacterial fresh-keeping plastic packaging material and preparation method thereof
  • High-efficiency visible light antibacterial fresh-keeping plastic packaging material and preparation method thereof

Examples

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Embodiment 1

[0036] A high-efficiency visible light antibacterial and fresh-keeping plastic packaging material is a polyethylene packaging material with g-carbon nitride / titanium dioxide nanoparticles attached to one side. In the high-efficiency visible light antibacterial and fresh-keeping plastic packaging material, the mass fraction of g-carbon nitride / titanium dioxide nanoparticles is 1%, and the diameter of the g-carbon nitride / titanium dioxide nanoparticles is 5 nm.

Embodiment 2

[0038] A preparation method of the high-efficiency visible light antibacterial and fresh-keeping plastic packaging material described in Example 1, comprising the following steps:

[0039] (1) Preparation of g-carbon nitride nanoparticles: configure 30% melamine aqueous solution, and prepare g-carbon nitride nanoparticles in an autoclave. The preparation temperature in the autoclave is 180° C., and the preparation time is 8 hours;

[0040](2) Preparation of g-carbon nitride / titanium dioxide nanoparticles: Mix 15mL ethanol, 0.5mL water, 0.1mL nitric acid, and 0.0094g g-carbon nitride particles to prepare liquid A, mix 14mL ethanol, 2mL tetrabutyl titanate After mixing the esters to prepare liquid B, add liquid B dropwise to liquid A and stir for 0.5 hours at the same time, then add the mixture of liquid A and liquid B into the autoclave for reaction, the preparation temperature in the autoclave is 130 ° C, The preparation time is 8 hours. After the reaction is completed, it is ...

Embodiment 3

[0045] A preparation method of the high-efficiency visible light antibacterial and fresh-keeping plastic packaging material described in Example 1, comprising the following steps:

[0046] (1) Preparation of g-carbon nitride nanoparticles: prepare 50% melamine aqueous solution, prepare g-carbon nitride nanoparticles in an autoclave, the preparation temperature in the autoclave is 220° C., and the preparation time is 4 hours;

[0047] (2) Preparation of g-carbon nitride / titanium dioxide nanoparticles: Mix 20mL of ethanol, 1.5mL of water, 0.4mL of nitric acid, and 0.046g of g-carbon nitride particles to prepare liquid A, mix 18mL of ethanol, 6mL of tetratitanate After mixing the butyl esters to prepare liquid B, add liquid B dropwise to liquid A, and stir for 1 hour at the same time, then add the mixture of liquid A and liquid B into the autoclave for reaction, the preparation temperature in the autoclave is 180°C, The preparation time is 4 hours. After the reaction is completed...

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Abstract

The invention discloses a high-efficiency visible light antibacterial fresh-keeping plastic packaging material and a preparation method thereof, belonging to the technical fields of chemical industry, semiconductor materials and biology. The high-efficiency visible light antibacterial fresh-keeping plastic packaging material is a polyethylene packaging material with single-sided attached or double-sided attached mode or embedded g-carbon nitride/titanium dioxide nano particles. The invention provides two preparation methods, wherein the coating method comprises the following sequential steps: preparing g-carbon nitride nano particles, preparing g-carbon nitride/titanium dioxide nano particles, preparing a composite photocatalytic solvent, preparing silica sol and coating and preparing the antibacterial fresh-keeping plastic packaging material; and the melting method comprises the following sequential steps: preparing the g-carbon nitride nano particles, preparing g-carbon nitride/titanium dioxide nano particles and preparing the antibacterial fresh-keeping plastic packaging material in a melting manner. The packaging material disclosed by the invention can achieve long-lasting effects of resisting bacteria, keeping fresh and eliminating ethylene gas just under indoor visible light and weak light and stable in effect, and the photocatalytic material does not cause secondary pollution and is environment-friendly.

Description

technical field [0001] The invention relates to the fields of chemical industry, semiconductor materials and biology, in particular to an antibacterial and fresh-keeping plastic packaging material and a preparation method thereof. Background technique [0002] Antibacterial antistaling agents refer to agents that can inhibit the reproduction of bacteria and molds, creating an environment that is difficult for them to survive, and the effect can last for a long time. There are organic, inorganic and composite (inorganic-organic) antibacterial antistaling agents. However, due to the poor effect of organic antibacterial preservatives, the development and application of inorganic antibacterial preservatives have been rapidly developed and popularized in recent years. Among them, titanium dioxide-based photocatalytic antibacterial and antistaling agent has become a newly developed antibacterial and antistaling agent with broad application prospects because of its performance of k...

Claims

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Application Information

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IPC IPC(8): C08J7/06C08L23/06B65D65/38
Inventor 张延荣廖文娟
Owner YANGZHOU MINGSHENG NEW TECH
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