A Scalable Hybrid Fiber and Its Textile with Pore and Wrinkle Structures for Passive Personal Cooling

Abstract

A radiative cooling garment is proposed as a promising strategy for ordinary people to attain high thermal comfort indoors and outdoors. However, low production and poor cooling capability restrict its wide applications. Herein, a high‐performance fiber and its textile with pore and wrinkle structures are fabricated that consist of polyethylene (PE) and polyethylene oxide. This specific structure endows the fiber and textile with high IR absorbance/emissivity (90.97%) and sunlight reflectance (93.77%). Therefore, the hybrid porous PE fiber and textile show good cooling capabilities and avoid the human body overheating by 6.8 °C under direct solar irradiation. The inner temperature of the transparent house with a roof covered by the textile decreases by 20.3 and 12.5 °C compared to the states of no extra cover and cotton cover, respectively. Apart from that, the results of the simulating and real human body measurements demonstrate that the porous PE textile enables the human body to acquire the same thermal comfort as the bare state. More importantly, the porous PE fiber and textile are superlight, flexible, moisture‐permeable, and waterproof, and meanwhile, have excellent tensile strength and UV protection properties. The good comprehensive performance indicates that the textile is appealing for fabricating summer clothes.

Multifunctional Daytime Radiative Cooling Devices with Simultaneous Light-Emitting and Radiative Cooling Functional Layers

“…Radiative cooling systems operate by reflecting solar energy and emitting radiation energy. For this reason, devices should have high reflection in the solar spectrum ranging between 0.3 and 2.5 μm, including the ultraviolet/visible/near-infrared (UV–vis–NIR) spectrum. , The devices simultaneously require high emissivity in the range of 8–13 μm, as this is the atmospheric transmittance window, for transferring heat energy to the heat sink via radiation. , They generally consist of two parts: a solar reflection layer and a radiative cooling layer. The solar reflection layers are generally fabricated from highly reflective metals such as silver or aluminum, which have high reflectivities of over 90% in the vis–NIR region.…”

Materials in advanced design of personal protective equipment: a review

“…4 d). Compared with IR transparent materials, IR emissive materials could actively absorb heat and convert it to IR radiation, which enable the dissipation of heat from both external environment and the human body [ 79 ] . For the blockage of radiant heat flux in specific working scenario, such as firefighting and metallurgical industry, increasing the reflectance of thermal PPEs by deposition of metal nanoparticles could be adopted 80 , 81 .…”

In Situ Formation of SiO2 Nanospheres on Common Fabrics for Broadband Radiative Cooling

“…Traditional fabrics can only passively prevent body heat loss from the body to the external environment to maintain human body temperature or passively block strong sunlight to protect human body skin from sunburn. Radiative cooling fabrics can adjust human body temperature in two ways, one is to increase the transmittance of the fabric in the human thermal radiation band, which is beneficial to dissipate heat from the human body to the surrounding environment; the other is to increase the emissivity of the fabric in the atmospheric window and thus can radiate human body heat to outer space actively. − Yang et al − have carried out a lot of research on radiative cooling fabrics. They made use of the optical properties of polyethylene (PE) and performed a series of processes on PE textile to obtain radiative cooling fabrics.…”