Dynamic gating of infrared radiation in a textile

The human body absorbs and loses heat largely through infrared radiation centering around a wavelength of 10 micrometers. However, neither our skin nor the textiles that make up clothing are capable of dynamically controlling this optical channel for thermal management. By coating triacetate-cellulose bimorph fibers with a thin layer of carbon nanotubes, we effectively modulated the infrared radiation by more than 35% as the relative humidity of the underlying skin changed. Both experiments and modeling suggest that this dynamic infrared gating effect mainly arises from distance-dependent electromagnetic coupling between neighboring coated fibers in the textile yarns. This effect opens a pathway for developing wearable localized thermal management systems that are autonomous and self-powered, as well as expanding our ability to adapt to demanding environments.

Source: ScienceNOW - February 7, 2019 Category: Science Authors: Zhang, X. A., Yu, S., Xu, B., Li, M., Peng, Z., Wang, Y., Deng, S., Wu, X., Wu, Z., Ouyang, M., Wang, Y. Tags: Materials Science reports Source Type: news