Window screens serve the multiple purposes of enabling ventilation while preventing the ingress of solid objects and insects. However, their intrinsic porosity makes them susceptible to fluid intrusion while maintaining ventilation, notably evident in the infiltration of high-velocity raindrops during inclement weather, flooding the room. Addressing this challenge, bilayer synergistic mesh featuring an upper superhydrophilic (SHPi) surface and a bottom Janus wettability designed is presented to withstand puncture from continuous high-speed droplets. This innovative design incorporates a dual waterproof mechanism, providing instantaneous penetration resistance through energy dissipation and long-term infiltration resistance by a stable liquid film against high-speed droplets. The SHPi-Janus bilayer synergistic mesh demonstrates exceptional capability in repelling droplet penetration at a vertical high velocity of 4.5 m s −1 , significantly mitigating droplet infiltration under most rainfall conditions in the real world. Experimental findings reveal that the droplet penetration ratio of SHPi-Janus mesh is a mere 3.6% under sustained high-velocity droplet impact, a substantial leap forward compared to the 61.1% observed with commercial screen.
Perspiration conduction is essential for regulating the body's water and temperature balance. Significant advancements have been achieved in the field of textiles engineered for guiding water movement, thanks to their outstanding and practical control of uneven wetting properties. This progress carries important implications for preserving energy, promoting human well-being, and enhancing comfort. Nonetheless, current textile materials intended for sweat conduction are primarily focus on unidirectional transport of water, neglecting the air permeability during water transportation results in dampness and stickiness especially during heavy perspiration. In this study, a fabric with a tailored antisymmetrical wettability establishing an array of gas transport windows was fabricated via electro-blown spinning, endowing the fabric with long-term air permeability. It demonstrated an air permeability rate (APR) of up to 307.49 mm s −1 , a water vapor transmission (WVT) rate of 3133.76 g m −2 day −1 , and a water absorption rate (WAR) capacity of 2039.01 %. Especially, during the process of sweat wicking, the water infiltration restricted air permeability, however, the designed breathable window still maintained a high gas permeation rate of up to 214.61 mm s −1 , which was much higher than non-soaked commercial jeans and lab coat. Additionally, blueberry anthocyanins was incorporated into fabrics, acting as a portable sweat pH sensor based on colorimetric analysis, which was capable of monitoring the pH levels of sweat. When sweat shifted from acidic to alkaline, the anthocyanins underwent a structural transformation from flavylium cations to quinoid alkali. During the process, the fabric underwent a transition in color, changing from red to blue, which contributed to real-time monitoring of human body health performance in a non-invasive manner. This study presented a dependable method for creating intelligent textiles with patterned antisymmetric wettability, demonstrating significant promise for use in functional fabrics designed for individual moisture control.
危险品化学品经营许可证（带存储）