Electrospinning of Fluorine-Free Waterproof–Breathable Nanofiber Membranes with Thermal Regulation for Anticounterfeiting

Abstract

Waterproof and breathable membranes (WBMs) have gained significant attention as versatile functional materials. However, developing a fluorine-free WBM with waterproofness, breathability, and thermo-regulation performance using a straightforward strategy remains a significant challenge. Direct electrospinning was used to fabricate fluorine-free silicon-based polyurethane/graphene quantum dots/stearic acid (SiPU/GQDs/SA) nanofiber membranes. SA, a phase change material with low surface energy, imparts the nanofiber membrane enhanced hydrophobicity and thermo-regulation performance. Graphene quantum dots (GQDs) further increased the phase transition enthalpy of the SiPU/GQDs/SA nanofiber membranes. The resulting SiPU/GQDs/SA-20 WBM demonstrates exceptional water resistance (hydrostatic pressure, 67.8 kPa), good breathability (water vapor transmission (WVT) rate, 5166 g m −2 d −1 ), remarkable tensile strength (tensile stress, 5.95 MPa), stable thermo-regulation performance (phase transition latent heat, 29.57 J/ g), and outstanding anticounterfeiting performance. This fluorine-free, highly protective, and comfortable WBM offers extensive application prospects in fields such as outdoor textiles and electronic devices.

Wound Healing Accelerated by Silver Nanowire–Doped Methacryloyl Gelatin Dressings

“…We evaluated the breathability of GMAN x composite hydrogels using the water vapor transmission rate (WVTR) . We determined the WVTR of GMAN x using a water vapor transmission tester (W3/062) and the moisture-permeable cup weighing method with the test parameters of 26 °C, 90% RH.…”

Interlaced Amphiphobic Nanofibers for Smart Waterproof and Breathable Membranes with Instant Waterproofness Monitoring Ability

“…The obtained nanofiber membrane exhibited an outstanding hydrostatic pressure of 104 kPa and a WVT rate of 11.5 kg m –2 d –1 . In comparison with hydrophobic nanofibers, amphiphobic nanofiber membranes showing repellence to both water and oil liquids are more desirable because they normally exhibit enhanced waterproofness. − …”