According to foreign media reports, scientists have recently developed a new textile, which can not only keep the wearers warm in the cold environment, but also cool them when the weather gets hot. This experimental material was developed by a team led by Professor Tao Guangming of Huazhong University of Science and Technology. Its production method is: first, the silk and chitosan are freeze-spun to form a fiber with a porous microstructure-by the way, chitosan is a high practicality found in the shell of crustaceans Natural compounds.
Next, the pores in the fiber are filled with polyethylene glycol (PEG), which is a phase change material that is solid when hot and liquid when cold. Finally, an organic polymer called polydimethylsiloxane is coated on the fiber to prevent PEG from leaking out in the liquid state.
It is said that the resulting thread has strength, elasticity and water resistance. The test method is to interweave them together to form a piece of material, and then sew it on a traditional polyester glove worn by a volunteer.
When the person puts the gloved hand in a space heated to 122 ºF (50 ºC), PEG will melt into a liquid-while absorbing the ambient heat, it also absorbs the surrounding heat-thus making the sticker The skin under the film cools. However, once the volunteers moved their hands to a space cooled to 50 ºF (10 ºC), PEG would solidify and release stored heat, warming the skin.
Scientists say that this manufacturing process can be mass-produced, and it should be relatively easy to integrate this material into the existing textile industry.
A paper about the study was recently published in the Journal of Applied Materials and Interfaces of the American Chemical Society.
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