Cold-chain logistics tracking tag based on nanometre thermosensitive color-changing material

Abstract

The invention discloses a production method of a cold-chain logistics tracking tag based on a nanometre thermosensitive color-changing material. The method comprises the following steps that 1) a magnetic-response photonic crystal is prepared; 2) the magnetic-response photonic crystal prepared in step 1) is ultrasonically dispersed into a thermosensitive dispersion liquid; 3) the dispersion liquidin step 2) is sealed a thin container or in a polymer film; 4) in addition to a special magnetic field condition, the thermosensitive liquid film presents patterns and colors; 5) the thermosensitiveliquid film is put into a fridge to fix the patterns and colors, and a cold-chain temperature tag is obtained. The tag doesn't change color at sensitive temperatures, changes in color and pattern in excess of the sensitive temperature, and the change is irreversible. The cold-chain logistics tracking tag based on the nanometre thermosensitive color-changing material 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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