Hierarchically Engineered Silk Fibroin Nanotextiles with Spectral Selectivity and Asymmetric Nanostructure for Sustainable Personal Thermal-Wet Regulation
IF 21.3 1区 工程技术Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Zirong Li, Yun Yuan, Leilei Wu, Liying Qin, Man Zhou, Yuanyuan Yu, Qiang Wang, Ping Wang
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引用次数: 0
Abstract
Passive cooling strategy with zero-energy consumption is effective in preventing people from heat stress. However, most of the existing radiative cooling textiles are fabricated with non-degradable hydrophobic synthetic polymers and lack the functions of sweat management. Herein, a hierarchically designed dual Janus nanofibrous textile with superior thermal-wet management capability is proposed by targeted selection of spinning solvents with different properties during electrospinning. The embedded Al2O3 nanoparticles and BN nanosheets in silk fibroin nanofibers endow the textile with high solar reflectivity (97.12%) and infrared emissivity (98.69%), alongside improved in-plane and through-plane thermal conductivity (1.593 and 0.1187 W·K−1·m−1, respectively). Benefiting from the asymmetric characteristics of the two sides in terms of fiber diameter and wettability, the nanofibrous textile exhibits unparalleled water transport index (\({\text{R}}\)=1028.93%) and exceptional water vapor transmission rate (141.34 g·m−2·h−1). The textile integrates radiative cooling, rapid heat conduction, and unidirectional sweat evaporation, achieving a cooling effect exceeding 9 °C under direct sunlight when worn. Moreover, the Janus textile has good biocompatibility, satisfactory wearability and air breathability, ensuring its comfort in wearable applications. Computer simulations complement experimental results, providing insights into the deep-seated mechanisms of nanofiber formation, Mie scattering, and water transport. This innovative design offers promising prospects for the development of next-generation passive-cooling textiles.
Highlights
Biodegradable silk fibroin replaces petroleum polymers for passive-cooling textiles.
Tunable spinnability is achieved through solvent surface tension/rheology control.
Asymmetric pore structures enhance unidirectional sweat transport of Janus textiles.
Heat conduction, radiation and evaporation together contribute to multimode cooling.
Multiscale simulations elucidate nanofiber formation, radiative cooling, and rapid-drying mechanisms.
采用零能耗的被动冷却策略可以有效地预防人们的热应激。然而，现有的辐射冷却纺织品大多是由不可降解的疏水合成聚合物制成的，缺乏排汗功能。在静电纺丝过程中，通过有针对性地选择不同性质的纺丝溶剂，提出了一种具有优异热湿管理能力的分层设计双Janus纳米纤维织物。在丝素纳米纤维中嵌入Al2O3纳米粒子和BN纳米片，使丝素纳米纤维具有较高的太阳反射率（97.12）%) and infrared emissivity (98.69%), alongside improved in-plane and through-plane thermal conductivity (1.593 and 0.1187 W·K−1·m−1, respectively). Benefiting from the asymmetric characteristics of the two sides in terms of fiber diameter and wettability, the nanofibrous textile exhibits unparalleled water transport index (\({\text{R}}\)=1028.93%) and exceptional water vapor transmission rate (141.34 g·m−2·h−1). The textile integrates radiative cooling, rapid heat conduction, and unidirectional sweat evaporation, achieving a cooling effect exceeding 9 °C under direct sunlight when worn. Moreover, the Janus textile has good biocompatibility, satisfactory wearability and air breathability, ensuring its comfort in wearable applications. Computer simulations complement experimental results, providing insights into the deep-seated mechanisms of nanofiber formation, Mie scattering, and water transport. This innovative design offers promising prospects for the development of next-generation passive-cooling textiles.Highlights Biodegradable silk fibroin replaces petroleum polymers for passive-cooling textiles. Tunable spinnability is achieved through solvent surface tension/rheology control. Asymmetric pore structures enhance unidirectional sweat transport of Janus textiles. Heat conduction, radiation and evaporation together contribute to multimode cooling. Multiscale simulations elucidate nanofiber formation, radiative cooling, and rapid-drying mechanisms. Graphical Abstract
期刊介绍：
Advanced Fiber Materials is a hybrid, peer-reviewed, international and interdisciplinary research journal which aims to publish the most important papers in fibers and fiber-related devices as well as their applications.Indexed by SCIE, EI, Scopus et al.
Publishing on fiber or fiber-related materials, technology, engineering and application.
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