Researchers have developed a color-changing biomaterial that reacts and changes color against expired materials.
According to Tekna technology and technology news service, in the future, it is likely to see cheap 3D printed sensors on goods, which can indicate that the goods are overheating or under pressure. Empa research institute scientists have developed a type of biosensor that can be used as a carrier material for goods such as medicines with the help of a substance called hydroxypropyl. When hydroxypropyl cellulose is combined with water, it creates a kind of liquid crystal whose structure can only reflect certain wavelengths of the visible light spectrum.
For this reason, when a person observes it with his own eyes, it will only be seen in the form of the same color. It is also possible to change the structural color of this liquid by changing the temperature. Scientists added some carbon nanotubes to this liquid and increased its electrical conductivity. Then, this biodegradable mixture was prepared for 3D printing after adding cellulose nanofibers. With this material, they have made a 7-segment digital display with a pressure sensor that can respond to piezoelectric current against mechanical changes and color change.
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