A cold chain storage and transportation monitoring label based on nano temperature-sensitive color-changing materials

Abstract

The invention discloses a method for manufacturing a cold chain storage and transportation monitoring label based on a nano temperature-sensitive color-changing material. It comprises the following steps: 1) preparing a magnetically responsive photonic crystal; 2) ultrasonically dispersing the magnetically responsive photonic crystal prepared in 1) in a temperature-sensitive dispersion liquid; 3) sealing the dispersion liquid in 2) in a thin container or 4) Under the condition of applying a special magnetic field, make the temperature-sensitive liquid film present the pattern and color; 5) Place it in the refrigerator to fix the pattern and color, and obtain the cold chain temperature label. The label will not produce color changes within the sensitive temperature, and the color and pattern will change beyond the sensitive temperature, and it is irreversible. The invention has the advantages of high sensitivity, high reliability, high anti-counterfeiting and high integration.

Description

technical field [0001] The invention relates to the field of new materials and indicating products. Background technique [0002] Vaccines need strict cold chain storage and transportation during the circulation process, otherwise they will lead to deterioration and failure. The primary risk of inoculation of vaccines that have not been stored and transported in the cold chain at 2°C-8°C is ineffective immunity. Similar incidents have drawn widespread attention to whether frozen or refrigerated foods or pharmaceuticals comply with relevant standards (DB31 / T388-2007) in the supply chain. If consumers can know whether a single product that needs to be frozen or refrigerated is out of specification like reading the production date and shelf life, it will undoubtedly enhance consumers' confidence in the quality assurance of the product, and at the same time, it can also avoid uneven temperatures inside refrigerators and cabinets. accident. Therefore, it is absolutely necessary...

AI Technical Summary

Problems solved by technology

Its main disadvantages include: 1) expensive; 2) the dyes or chemicals used are toxic; 3) it can only display a specific temperature, and its application range is narrow; 4) its mechanical properties are poor and it is easily damaged

The patent (200420078916.0 cold chain label) also has its disadvantages: 1) The label is filled with liquid and can only be placed vertically. If it is tilted, it cannot be distinguished whether it is out of the cold chain; 2) The temperature sensing material is ethanol, and the temperature response property is single , can only judge whether it exceeds a certain temperature point

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