Qian Jiang

Conventional textiles face a significant challenge in maintaining personal thermal comfort under dynamically changing ambient temperatures, due to their intrinsic static thermal management mechanisms. To address this, an adaptive nanofiber membrane was developed based on recyclable high-shrinkage polyester (HSPET). This membrane achieves efficient "heating-cooling" bimodal switching through the synergistic effect of thermochromic microcapsules (TCMCs) and poly(dimethylsiloxane) (PDMS). At low temperatures, the membrane darkens to enhance solar energy absorption. At elevated temperatures, it lightens in color and, synergistically with the high infrared emissivity of PDMS, enables efficient solar reflection and radiative cooling. Outdoor testing revealed that the HSPET NMs exhibited a temperature increase of 4.62 °C and a decrease of 5.27 °C relative to control samples. Furthermore, the membrane exhibits excellent mechanical strength coupled with hydrophobic self-cleaning properties, ensuring reliability for practical applications. This work not only presents a high-performance bidirectional thermal management material but also proposes a novel pathway for the high-value resource utilization of waste polymers.

Spread-tow woven fabrics (STWs) have attracted considerable attention owing to their thin-layered characteristics, high fiber strength utilization rate and superior designability, finding wide application in the aerospace field. To meet the application requirements for materials with high specific strength/specific modulus in the aerospace field, this study designed an anti-sandwich structured composite with high specific load-bearing capacity. Herein, the core layer was a load-bearing structure composed of STW, while the surface layers were hybrid lightweight structures made of STW and nonwoven (NW) felt. Repeated impact test results showed that increasing the thickness ratio of the core layer enhanced the impact resistant stiffness of the overall structure, whereas increasing the proportion of NW felt in the surface layers improved the energy absorption of the composites but reduced their load-bearing stiffness and strength. The composite exhibited superior repeated impact resistance, achieving a peak impact load of 17.43 kN when the thickness ratio of the core layer to the surface layers was 2:1 and the hybrid ratio of the surface layers was 3:1. No penetration occurred after 20 repeated impacts at the 50 J or 3 repeated impacts at 100 J. Meanwhile, both the maximum displacement and impact duration increased, whereas the bending stiffness declined as the number of impacts increased. The failure mode was mainly characterized by progressive interfacial cracking in the surface layers and fracture in the core layer.

Fiber‐reinforced metacomposites with chiral architectures were fabricated using a layered configuration of functional fiber–quartz felt to investigate their electromagnetic shielding performance. The chiral design, inspired by traditional dual‐helix totem structures, enables electromagnetic attenuation through combined dielectric and magnetic loss mechanisms. The composites achieved high shielding effectiveness of up to 39 dB under 2 mm thickness and 0.346 wt.% filler content, with an effective bandwidth of 4.2 GHz (≥ 30 dB), fully covering the X‐band (8.2–12.4 GHz). This outstanding performance results from the synergistic integration of textile‐enabled chiral structuring with hybrid conductive–magnetic components, enhancing magneto‐electric coupling, cross‐polarization effects, and interfacial polarization. Due to the special chiral structure between conductive and magnetic materials, the electromagnetic wave propagation path is prolonged while their high electrical conductivity establishes additional conductive pathways to enhance dielectric loss. The conductive network modulates the local magnetic field distribution, induces magnetic domain fragmentation, thereby suppressing domain wall motion and increasing hysteresis loss. The proposed approach offers a scalable and lightweight solution for next‐generation applications such as 6G communication systems and radar base stations.