According to foreign media reports, when man-made fibers are involved, they can usually be strong or tough, but not both. However, a new material developed by scientists at Bayreuth University in Germany is said to have both characteristics.
In short, strength is the ability to withstand force without permanent deformation, and toughness is the ability to withstand force without breaking. According to reports, this new fiber not only combines these two characteristics, but is also very lightweight and fully recyclable.
Each fiber is approximately the width of a hair and is composed of up to 4,000 much smaller fibers made from an industrial polymer called polyacrylonitrile. These smaller fibers are called fibrils and are produced by the electrospinning process. They are bonded together longitudinally using a small amount of polyethylene glycol double azide.
The result is that a single fiber is composed of many connected fibrils. Draw and heat the fiber, then cool it for a few hours-still in the drawn state. The finished product is said to have similar qualities as spider silk. A short fiber (weight less than "Drosophila") can be used to repeatedly lift up to 30 grams of material without breaking or permanently stretching. Now researchers hope that once the technology is further developed, "multi-fiber polyacrylonitrile fiber" can be applied in textile, aerospace or pharmaceutical fields.
Chief scientist Professor Andreas Greiner said: "We can be sure that our research results open the door to new, forward-looking materials. These are expected to be practically applied in industry in the near future. In polymer science, our Fiber will be able to provide valuable services for further research and development of high-performance functional materials. "
A paper about the study was recently published in the journal Science. From Martin Luther Halle Wittenberg University in Germany, Aachen University of Technology, Jülich Research Center, Fraunhofer Institute for Materials and Systems Microstructure, Jiangxi Normal University in China, and ETH Zurich in Switzerland Of scientists also participated in this study.
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