![]() ![]() Cellulose fibers in nature are very disorganized, but a process called the flow-focusing method combines cellulose fibers, orientating them in the same way, to create CNF. The reason yarn made from CNF can conduct heat so well is due to the way it's made. "When we explored the thermal properties of a yarn made from CNF, however, we found that they show a different kind of thermal behavior, thermal conduction, and it's very significant, around 100 times higher than that of typical woody biomass or cellulose paper." "If you see plant-derived materials such as cellulose or woody biomass used in applications, it's typically mechanical or thermally insulating properties that are being employed," said Shiomi. But now and for the first time, a research team led by Professor Junichiro Shiomi from the University of Tokyo's Graduate School of Engineering has investigated previously unknown thermal properties of CNF, and their findings show these materials could be even more useful still. In recent years, many commercial products have used cellulose nanofiber (CNF) materials because their strength and durability make them a good replacement for polymer-based materials such as plastics that can be detrimental to the environment. But the secret of its material strength actually lies in its overlapping nanoscopic fibers. Cellulose is a key structural component of plant cell walls and is the reason why trees can grow to such heights. ![]()
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