Abstract
Janus fabrics, exhibiting unidirectional liquid transportation capability to foster a comfortable microclimate for our human body, have become a new research hotspot. However, integrating intelligent, adaptable functionalities into Janus fabrics to suit fluctuating environmental conditions and personal thermal perceptions remains a challenge. Herein, we proposed a smart pore-actuated Janus fabric with tunable functions based on mechanical stretching. Specifically, when the human feels hot and sweaty, they can manually stretch the spandex fabric to “open” its pores (from ∼ 41 μm to ∼ 138 μm) according to the actual situation. Meanwhile, the stretching can significantly decrease the positive breakthrough pressure of the fabric from 9.5 to 0.8 cm H2O, which can facilitate one-way sweat transportation and rapid heat dissipation (0.3 ℃ lower than that of the original fabric). Moreover, timely stopping stretching can “close” the fabric’s pores, avoiding excessive evaporation-induced chill. For comparison, in cold or rainy weather, the pores of the unstretched fabric are set to be “closed” (diameter: ∼41 μm) to prevent excessive heat loss (2.4 ℃ higher than that covered by the spandex fabric) and safeguard against external rainwater intrusion. This innovative design can maximize human comfort in diverse environments, and the underlying concept holds promise for the development of new-generation smart fabrics.
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