Packaging materials, preparation and testing methods for non-destructive testing of agricultural products and food quality

A technology for packaging materials and food quality, applied in chemical instruments and methods, packaging, wrapping paper, etc., can solve the problems of inability to detect spectral detection, without considering spectral detection, etc., to improve detection sensitivity, easy and fast operation, and meet the needs of rapid detection. Effect

Active Publication Date: 2022-06-17
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the requirements of spectral detection are not considered in the production of ordinary food packaging materials, and spectral detection cannot be carried out directly

Method used

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  • Packaging materials, preparation and testing methods for non-destructive testing of agricultural products and food quality
  • Packaging materials, preparation and testing methods for non-destructive testing of agricultural products and food quality
  • Packaging materials, preparation and testing methods for non-destructive testing of agricultural products and food quality

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] (1) Fabrication of flexible base layer;

[0063] Take the flat quartz wafer or silicon wafer and put it in acetone, ethanol and water for ultrasonic cleaning for 5 minutes each. After drying it, spin-coat polydimethylsiloxane on the surface and heat it to cure. The polydimethylsiloxane is used as the flexible base. bottom layer;

[0064] (2) the production of adhesive layer;

[0065] Spin-coat polyimide on the surface of the flexible substrate and heat it to cure, polyimide is used as an adhesive for bonding packaging and transparent conductive layers;

[0066] (3) the production of transparent conductive layer;

[0067] On the polyimide, 200 nm of indium tin oxide was vapor-deposited as a transparent conductive layer.

[0068] (4) Fabrication of nanostructured layer;

[0069] Firstly, 43nm nano-silver squares were synthesized; 0.1 mg / mL PEG-SH solution in chloroform was prepared; the nano-silver squares solution, PEG-SH chloroform solution and methanol solution wer...

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Abstract

The invention discloses a preparation and detection method of a packaging material used for non-destructive detection of agricultural products and food quality. Including film materials packaged on agricultural products or food, it is composed of a flexible base layer, an adhesive layer, a transparent conductive layer, and a nanostructure layer that are sequentially stacked from the outside to the inside, and the flexible base layer is a polydimethylsiloxane layer , the adhesive layer is a polyimide layer, the transparent conductive layer is an indium tin oxide layer, and the nanostructure layer is a silver nanoparticle layer; the polydimethylsiloxane film is spin-coated with polyimide for curing, and the indium oxide is sputtered Tin, silver nanoparticles are self-assembled on the transparent conductive layer, separated and removed according to pattern etching. The packaging material of the present invention can use the structure of the packaging material to amplify the detection signal when the packaging is intact, so as to realize the function of non-destructive detection of agricultural products and food quality; the method of the present invention can also image food packaging, which is easy and fast to operate, and is suitable for various detection requirements.

Description

technical field [0001] The invention relates to a preparation and detection method of a packaging material used for non-destructive testing of agricultural products and food quality, in particular to the preparation of a packaging material that can amplify spectral signals and the quality of the food in the packaging when the food packaging is complete method of detection. Background technique [0002] Food packaging materials refer to paper, bamboo, wood, metal, enamel, ceramics, plastics, rubber, natural fibers, chemical fibers, glass and other products used for packaging and holding food or food additives, and coatings that directly contact food or food additives. In order to maintain the quality of food, prevent food from deteriorating during storage, distribution and sales, prevent microbial contamination, and prevent super-chemical and physical changes, all kinds of food must be packaged. In order to meet the needs of food packaging, it varies according to the type of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/28B32B15/00B32B15/08B32B7/12B32B33/00B32B37/00B32B37/12G01N21/3586G01N21/65B65D65/40
CPCB32B27/283B32B15/00B32B15/08B32B7/12B32B33/00B32B37/00B32B37/12G01N21/3586G01N21/65B65D65/40B32B2307/40B32B2439/70B32B2037/243Y02W90/10
Inventor 谢丽娟王英力刘湘江
Owner ZHEJIANG UNIV
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