Packaging black technology was born! Can eat and read more environmentally friendly!

[China Packaging News] Graphene is already a well-known magic material. Because of its excellent thinness and strength, graphene has become a good thermal and conductive material, and it is resistant to bacteria and even fights cancer.

But now this amazing material is actually edible !

Rice University ’s James Tour has confirmed a method of etching graphene “ tags ” on foods such as bread and potatoes, and also includes materials such as cardboard and cloth as RFID tags.

This development is based on the work of the previously developed new material laser induced graphene (LIG) .

This technique involves using a laser to heat the surface of the material to form a graphene foam-like structure. From the roots, this basic material is a polymer called polyimide, and then the Rice University team successfully used the same process to make LIG on the surface of wood .

Tour observed: " In some cases, multiple lasers can form a two-step reaction. " " First, the laser converts the target surface into amorphous carbon by photoelectric heating. Then, in the subsequent laser transmission process, Selective absorption of infrared light converts amorphous carbon to LIG " .

We found that the wavelength is very important.

The team found that this technique is also suitable for foods such as bread, potatoes and coconut.

Among them, an organic polymer called lignin is very important. Not only does it exist in all these substances, but it can also use dry wood to form graphene.

Due to the conductivity of these graphene etchings, it is possible to embed RFID tags and sensors directly on the food, to tell you the history of the product or to warn you about potential trace organic pollutants.

Tour said, " Maybe all foods will have a small RFIS label that introduces information about the current location, storage time, origin, and journey to the table. " " All of these are not on separate labels for food, but The food itself. "