Preparation method and application of fluorescence ratio type meat freshness indicating film

CN115652534BActive Publication Date: 2026-07-10JIANGSU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
JIANGSU UNIV
Filing Date
2022-11-15
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Existing methods for testing the freshness of meat products are cumbersome and time-consuming. Traditional organic fluorescent dyes pose potential hazards, and carbon quantum dot sensors, with their single emission peak, are not easily observed by the naked eye and are not sensitive to low concentrations of ammonia, making them difficult to integrate into packaging.

Method used

Dual-emission peak carbon quantum dots were synthesized using a one-step hydrothermal method and then fixed in a hydrophobic polymer membrane by electrospinning to prepare a fluorescent ratio indicator tag. The freshness of meat products was detected by utilizing the response of carbon quantum dots to volatile biogenic amines.

Benefits of technology

It enables visual detection of meat freshness, improves the stability and sensitivity of the sensor, is simple to operate, safe and non-toxic, and easy to industrialize.

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Abstract

The application belongs to the field of intelligent indication packaging of food, and particularly relates to a preparation method and application of a fluorescent ratio type meat freshness indication film. The application synthesizes double-emission carbon quantum dots through a one-step hydrothermal method, and then fixes the carbon quantum dots in a hydrophobic polymer film through an electrospinning method to prepare a portable indication label with high stability; the indication label responds to volatile biogenic amines, and can further monitor the freshness of chilled meat. The electrospinning film forming technology of the application obtains nanoscale fibers, which have a larger specific surface area and higher porosity than traditional films, and can uniformly fix the carbon dots in the fibers, and are more sensitive to gas; and the operation method and process are simple, the raw material cost is low, the raw material is easy to obtain and easy to realize industrialized production, and the application prospect is wide.
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Citation Information

Patent Citations

  • A method of preparing a highly-sensitive type meat freshness degree detecting and indicating card through an electrostatic spinning process

    CN106404761A

  • Regulation and preparation method and application of multicolor fluorescent carbon dots

    CN109266337A