According to foreign media reports, researchers at Carnegie Mellon University in the United States developed a biodegradable battery using squid ink as raw material. The results of this study were recently published in the Proceedings of the National Academy of Sciences. The battery can be used to create a novel oral delivery device for injecting drugs.
Bettinger said, "We believe that one of its interesting applications is the controlled release of drugs. The delivery of drugs through the oral route can overcome the problems many people encounter when injecting drugs."
This biodegradable battery can be used to make a controlled release device that is swallowed by the body like a pill. It can pass through the stomach and release the drug. Many medicines cannot be taken orally because they are destroyed by the body's digestive system before they are effective.
After developing battery samples, researchers are working on developing drug delivery devices for specific medical applications that can deliver substances such as vaccines or arthritis drugs and can sense what it is in the digestive tract. position. The above degradable battery can power this device.
Bettinger explained that the battery's power or charging capacity is not very good, but its highlight is the biocompatibility. This sodium ion battery is made of melanin and manganese oxide that can be decomposed into non-toxic components. Melanin is taken from the sepia ink. The research team was interested in this naturally occurring melanin because of its “disordered, semi-conductive†nanostructures. They found that natural melanin has a higher charge storage capacity than laboratory-made melanin. Low concentrations of natural melanin also exist in the human body.
Although the battery is made of biocompatible material, it can pass through the digestive system without being decomposed because it does not deplete quickly. Bettinger said, "It's about a few weeks or months of decay."
Compared with conventional batteries, biodegradable batteries are safer edible electronic devices. Bettinger said, "If it gets stuck somewhere in the body, it has no effect on the body."
The research team continues to study the conductive properties of melanin. "If our understanding of this process can be further deepened, then we may be able to design new materials with more interesting features."
In addition to medicines, there are many exciting potential uses for biodegradable batteries. Bettinger believes that batteries can also power biodegradable devices that act as sensors or monitors in other sensitive environments.
He said, “Imagine if an oil leak occurs and you want to know what the oil leak is, people can put devices that can communicate with each other in the ocean and send the information back to researchers. When the battery is consumed, the equipment can be left free. Degraded in the natural environment."
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