The University of Wisconsin-Madison official website recently released news that Wang Xudong, associate professor of materials at the university, led his team to develop a cheap and simple way to convert footsteps on the floor into usable electric energy, Into a more "green" product. Related research published in the "nano-energy" magazine.
The new method uses a common and often discarded material - wood pulp. Wood pulp mainly contains nanofibers of wood fiber, which is a common component in the floor. After chemical treatment of these nanofibers, once combined with untreated nanofibers, a current is generated.
The new material will be walking power into electricity
"The chemically treated nanofibrous layer and the non-chemically treated nanofiber layer are wrapped in cardboard, and the two layers of nanofibers flow from one layer to the other due to their different electrical properties to form Current. Packed with two layers of nano-wood pulp fiber cardboard, high-pressure technology can be integrated into the wood floor. "Wang Xudong Science and Technology Daily reporter told reporters that this technology can be easily integrated into the market any kind of wood flooring in.
When the two layers of nanofibers are integrated into the floor, they can generate electricity, light the house's lighting, or charge the battery. Wood pulp is extremely cheap, rich in sources, recyclable and biodegradable, and wood flooring combined with new technologies will be as affordable as ordinary flooring. In the past, there were also reports of materials used to generate electricity by walking, but those materials often used ceramics and metals at a relatively high cost.
Wang Xudong said that in addition to cheap, they experimentally studied the useful life and efficiency of nanofiber pulp fibers for energy harvesting. Preliminary tests show that the new material can be used repeatedly millions of times. "We still can not translate this number of years into a measure of how long the floor will last, but with proper design modifications, the new material must exceed the floor life."
The tests also showed that 35 LED bulbs can be lit at the same time for every step of power generation on the floor containing this new material.
Roadside energy harvesting techniques are sought after
Over the years, Wang Xudong team has been studying the use of vibration to generate electrical energy technology, testing a variety of different materials, optimization known as "tribo-charged nano-power generation equipment," the relevant technology. Electrostatic clothing is a kind of friction electrification, a lot of wearable electronic devices is the use of this friction phenomenon to obtain electricity. While wood pulp nanofibers once again expanded the range of sources that make use of existing mechanical energy.
Wang Xudong team breakthroughs in research, is the blitz of green energy research - the latest achievements of roadside energy harvesting technology. "Roadside energy harvesting techniques need only consider where enough energy is available for collection and use, as long as there is a crowd activity to consider gathering." Wang Xudong said, "One idea is to develop wearable devices, and the other is Collect equipment for densely populated local energy, such as the floor technology we developed this time. "Installation of integrated flooring, such as gymnasiums, shopping malls, and other crowded places, crowded aisles, etc., that integrate this new energy harvesting technique, Big power. The functional unit of nanofibers that collect energy is less than one millimeter in thickness, so several more layers of such functional units can be implanted to increase the amount of power generated and the floor does not significantly thicken after implantation.
The future or a powerful supplement to solar energy
Roadside energy harvesting technology is in some ways more competitive than solar and does not rely on the weather, so many researchers believe it will play a big role in the development of renewable energy sources that replace fossil fuels.
However, Aristotel Spruhr, a researcher at the University of New South Wales in Australia, believes that, like existing power generation floors, new materials have no advantage over other green energy sources. "If you want green energy to be socially beneficial, you should look for solar or wind energy, and new materials, although innovative in ideas, may not make any sense."
Wang Xudong countered this, the new material is a powerful supplement to solar energy. "Our philosophy is to turn the wasted energy in our lives into usable electric energy that has an incomparable advantage over solar energy, such as being able to be used in under-sunlit or under-sunnable buildings."
Wang Xudong has applied to the university where he is located, setting the prototype of new material power generation on the campus for publicity and education of the students. They will also continue to optimize for various performance studies.
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