Nanofiber Membrane-Integrated Multi-Scenario Functional Sportswear: Hierarchical Structure Design and Dynamic Performance Adaptation

The present study focuses on the development of multi-scenario functional sportswear by integrating nanofiber membranes, aiming to address the evolving demands for performance, comfort, and adaptability in modern sportswear. The proposed hierarchical structure consists of four layers with gradient porosity: the skin with cell gaps of 10–20 nm, a nanofiber membrane with a porosity of 100–200 nm, a hydrophilic microfiber layer with a porosity of 1–2 μm, and an outer fabric with a porosity of 10–20 μm. This gradient porosity design is theorized to facilitate efficient sweat transportation during physical activity, a phenomenon analyzed using the Bernoulli equation to quantify pressure gradients between the inner and outer layers of the garment. A comprehensive review of the extant literature identifies three key factors influencing sweat transportation efficiency: motion velocity, which is directly proportional to transportation efficiency; air density, which has a negative correlation with efficiency and varies with altitude; and temperature differences, which promote moisture diffusion. The sportswear exhibits adaptive functionality across seasons: in summer, a "water bridge" structure forms to insulate against high external temperatures, while in winter, an "ice layer" effect is generated to retain body heat. The integration of nanofiber membranes has been demonstrated to enhance moisture management while concomitantly improving mechanical properties and protective capabilities. Theoretical calculations based on the Rule of Mixtures show that the nanofiber membrane increases the tensile strength of the composite structure from 25.2 MPa to 41.15 MPa, contributing approximately 38.8% to the total strength. The membrane also acts as a barrier against pollutants. Beyond athletic applications, the design demonstrates versatility for extreme environments, including high-altitude jungle military operations, high-temperature firefighting, and Arctic exploration, where its thermal retention properties are advantageous. This research contributes significantly to the advancement of functional sportswear design by integrating material science and practical usability, paving the way for sustainable and scenario-specific innovations in the textile industry.