Strain-adjustable reflectivity of polyurethane nanofiber membrane for thermal management applications

Hierarchical porous dual-mode thermal management fabrics achieved by regulating solar and body radiations

“…After being covered with PPAN, the skin temperature only demonstrated a B0.3 1C increase from the naked one. In contrast, the average temperature of the skin 15,[18][19][20]31,[35][36][37][38][39][40][41][42][43][44][45][46][47] covered with cotton fabric rose to 34.8 1C, showing a temperature increase of 1 1C. It is clear that PPAN efficiently dissipates the thermal energy of the human body into the surroundings.…”

“…4h and Table S2 (ESI †). 15,[18][19][20]31,[35][36][37][38][39][40][41][42][43][44][45][46][47] The Janus fabric in this work stands out among other PTM fabrics due to its broad application scenarios and excellent cooling/heating performances. The experiments and calculations well demonstrate the advantages and significance of the Janus fabric for zero-energy thermal management and health care.…”

Fabrication of Recyclable Polyurethane Elastomers with Excellent Mechanical and Creep-Resistant Properties Based on a Bio-Sourced Azine Chain Extender

“…Polyurethane elastomers (PUEs) have been used extensively in various fields such as coating, adhesives, damping and buffering materials, medical materials, flexible electronics, and textile materials, , owing to their excellent mechanical properties, resilience property, and biocompatibility. Compared to linear thermoplastic PUEs, thermoset ones possess higher mechanical strength, heat resistance, chemical resistance endowed by the cross-linking structures .…”

Strain-Insensitive Outdoor Wearable Electronics by Thermally Robust Nanofibrous Radiative Cooler

“…Such thermal factors, if not addressed, could potentially result in device performance degradation , and even pose a risk of skin irritation . In this regard, numerous cooling technologies, which have been extensively developed in recent years, could be potent solutions. − Of the various approaches, to address the issues, a myriad of research has introduced passive radiative coolers, which can dissipate heat accumulated by external sources or generated in electronics by reflecting the sunlight and emitting thermal radiation into the cold outer space. − Thus, for the practical application of stretchable outdoor electronics, porous structures based on various polymers such as polyurethane (PU) , and styrene-ethylene-butylene-styrene (SEBS) have been frequently integrated into wearable devices. , However, conventional approaches using thermoplastic polymers present a challenge: they become pliable at elevated temperatures and solidify upon cooling, resulting in the loss of radiative cooling functionality as the porous structure is compromised when the polymers turn malleable during heating. Consequently, there is an urgent demand for the development of wearable electronics that simultaneously satisfies thermal stability as well as durability and stretchability for bringing forward the advent of a practical outdoor wearable electronic device.…”

“…13−15 Of the various approaches, to address the issues, a myriad of research has introduced passive radiative coolers, which can dissipate heat accumulated by external sources or generated in electronics by reflecting the sunlight and emitting thermal radiation into the cold outer space. 16−19 Thus, for the practical application of stretchable outdoor electronics, porous structures based on various polymers such as polyurethane (PU) 20,21 and styrene-ethylene-butylene-styrene (SEBS) have been frequently integrated into wearable devices. 22,23 However, conventional approaches using thermoplastic polymers present a challenge: they become pliable at elevated temperatures and solidify upon cooling, 24 resulting in the loss of radiative cooling functionality as the porous structure is compromised when the polymers turn malleable during heating.…”