Preparation method of multifunctional packaging paper capable of wirelessly monitoring fruit freshness in real time

A real-time monitoring, multi-functional technology, applied in packaging paper, wrapping paper, packaging, etc., can solve the problems of bulky sensor, harsh test conditions, limited application, etc., to achieve good humidity response, good bacteriostatic effect, real-time wireless monitoring The effect of quality change

Pending Publication Date: 2022-03-11
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most sensors are used to monitor the storage and transportation of fruits and vegetables, but traditional sensors are bulky and require harsh test conditions, which limits their further application in practical applications

Method used

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  • Preparation method of multifunctional packaging paper capable of wirelessly monitoring fruit freshness in real time
  • Preparation method of multifunctional packaging paper capable of wirelessly monitoring fruit freshness in real time
  • Preparation method of multifunctional packaging paper capable of wirelessly monitoring fruit freshness in real time

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The following steps can be used to produce a multi-functional wrapping paper that can monitor the freshness of fruit wirelessly in real time:

[0036] (1) Take 0.1 part of ordinary filter paper, 1 part of metal salt, and 0.5 part of carboxylic acid organic ligand in parts by weight; the metal salt is silver nitrate, copper nitrate, zinc nitrate, cobalt nitrate or ferric chloride; The carboxylic acid organic ligand is terephthalic acid or trimesic acid.

[0037] (2) Put ordinary filter paper in an appropriate amount of water and organic solvent blend, the volume ratio of water and organic solvent is 1:2; then add an appropriate amount of alkali solution with a concentration of 10% by mass, and place it in the reaction system, After stirring for 1 hour at 80°C, add 2 parts of modifier to the reaction system and stir for 3 hours; take out the prepared modified filter paper, wash it with methanol twice and dry it for later use; the modifier is chlorine Sodium acetate; The ...

Embodiment 2

[0042] The following steps can be used to produce a multi-functional wrapping paper that can monitor the freshness of fruit wirelessly in real time:

[0043] (1) Take 1 part of ordinary filter paper, 5 parts of metal salt, and 4 parts of carboxylic acid organic ligands in parts by weight; the metal salt is silver nitrate, copper nitrate, zinc nitrate, cobalt nitrate or ferric chloride; The carboxylic acid organic ligand is terephthalic acid or trimesic acid.

[0044] (2) Put ordinary filter paper in an appropriate amount of water and organic solvent blend, the volume ratio of water and organic solvent is 1:3; then add an appropriate amount of alkali solution with a concentration of 20% by mass, and place it in the reaction system, After stirring for 1-4 hours at 50°C, add 3 parts of modifier to the reaction system and stir for 4 hours; take out the prepared modified filter paper, wash it with methanol for 3 times and dry it for later use; the modifier It is sodium chloroaceta...

Embodiment 3

[0049] The following steps can be used to produce a multi-functional wrapping paper that can monitor the freshness of fruit wirelessly in real time:

[0050] (1) Take 2 parts of ordinary filter paper, 10 parts of metal salt, and 8 parts of carboxylic acid organic ligands in parts by weight; the metal salt is silver nitrate, copper nitrate, zinc nitrate, cobalt nitrate or ferric chloride; The carboxylic acid organic ligand is terephthalic acid or trimesic acid.

[0051] (2) Put ordinary filter paper in a proper amount of water and organic solvent blend, the volume ratio of water and organic solvent is 1:5; then add an appropriate amount of 30% alkali solution in the reaction system, After stirring for 1-4 hours at 20°C, add 5 parts of modifier to the reaction system and stir for 6 hours; take out the prepared modified filter paper, wash it with methanol for 6 times and dry it for later use; the modifier is sodium chloroacetate; the organic solvent is methanol, ethanol or isopr...

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PUM

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Abstract

The invention discloses a preparation method of multifunctional packaging paper capable of wirelessly monitoring fruit freshness in real time, which comprises the following steps: by taking common filter paper as a base material, modifying the common filter paper by using a water and organic solvent blending solution, an alkali solution and a modifier to obtain modified filter paper, and chemically crosslinking metal ions with the modified filter paper to obtain the multifunctional packaging paper capable of wirelessly monitoring fruit freshness in real time. And finally, preparing the multifunctional packaging paper capable of wirelessly monitoring the freshness of the fruits in real time through a strategy of growing a nano-metal material on a metal crosslinking site. Nano-metal substances on the surface of the multifunctional packaging paper not only can effectively kill pathogenic microorganisms such as escherichia coli, staphylococcus aureus and aspergillus niger, but also have the humidity response characteristic of showing different resistance changes under different humidity. The multifunctional packaging paper prepared by the invention is simple in preparation process, the filter paper is green and environment-friendly, and the composite material not only can be applied to fresh keeping and quality monitoring of fruits in the agricultural field, but also is expected to be applied to the field of biomedicine.

Description

technical field [0001] The invention relates to the technical field of wrapping paper, in particular to a preparation method of wrapping paper which can be used for real-time wireless monitoring of fruit freshness and has the function of antibacterial and fresh keeping. Background technique [0002] Fruits are fresh and live agricultural products, which are characterized by being fresh and perishable. It is necessary to clearly understand their edible period, so that they can be transported and sold within the period when they can maintain their original freshness, flavor and nutrition to the greatest extent. Storage and transportation is an important process for fruits from harvesting to marketing, and mildew and deterioration are prone to occur during transportation and storage. However, in the actual storage and transportation process, fruits are always in a sealed state, and it is difficult to obtain information on changes in fruit quality in real time. Therefore, how to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/10D21H17/66D21H17/14D21H17/07G01N33/02
CPCD21H27/10D21H17/66D21H17/14D21H17/07G01N33/025
Inventor 林宝凤张远程李昊林镇浩邓永福和秋雯
Owner GUANGXI UNIV
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