In order to create more environmentally friendly electronic devices, researchers have envisioned an "electronic skin" that can be completely recycled. And even if torn, e-skin can repair itself. According to a study published in Science Advances, the device is essentially a sensor-equipped membrane that measures pressure, temperature, humidity, and airflow. The film is a mixture of three commercially available compounds and nano silver particles.
If the "Electronic Skin" is marked, the chemical substances on both sides can be "restored" on their own. Even if the surface is broken, the film can be dropped into the solution and the material can be “liquefied†again. Someday, this technology can be used on prosthetics, robots, or smart fabrics.
In fact, many laboratories around the world are developing electronic skin. For example, a European research team has developed a solution that allows users to manipulate (not touch objects) with magnets. In addition, Japan also has a technology that turns smart shirts into motion controllers for video games.
Study Pictogram - 1: Fully Recyclable Plastic Electronic Skin.
However, what is special about the latest research results is that it can be recycled and reused:
Take the United States as an example. In 2014 alone, the country created 16 billion pounds (nearly 7.26 million tons) of electronic waste. All of these circuit boards, transistors, and hard drives contain toxic chemicals that must be properly disposed of.
Study Photograph 2: Film purity and conductivity characteristics.
Research coauthor, Xiao Jianliang, an assistant professor of mechanical engineering at the University of Colorado Boulder, said:
This special equipment does not produce any waste. We want to make the nail products more environmentally friendly.
Study Map - 3: The top left is a schematic diagram of the recycling process.
Even if the "electronic skin" is seriously damaged, it can be recycled through the "circulatory solution":
• The solution can break down the matrix into small molecules, letting the silver ions sink into the bottom, and then all the materials can be reused to make another functional electronic skin.
◠In the case of 140°F (60°C), complete recovery takes about 30 minutes; if it is at room temperature, it takes 10 hours.
◠In contrast, materials “self-healing†are much faster—less than half an hour at room temperature and only a few minutes at 60°C.
Study Pictogram - 4: The upper part is an electronic skin design diagram.
This electronic skin is not perfect, it is soft, but not as elastic as human skin. The professor stated that he and his colleagues are working hard to improve the scalability of the device so that it can be more easily applied to the manufacture of artificial limbs or robots.
But the most exciting thing for them is the environmental characteristics of the study: “We are facing increasing pollution problems and the importance of environmental protection is also increasing. We must ensure natural safety for ourselves and the next generation.â€
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