Yang Tianbo, Hou Likai, Fan Xu, Yan Hui, Bao Fubing
Zhejiang Provincial Key Laboratory of Flow Measurement Technology, China Jiliang University, Hangzhou, Zhejiang 310018, People's Republic of China.
School of Mechatronics Engineering, Harbin Institute of Technology (HIT), Harbin, Heilongjiang 150001, People's Republic of China.
ACS Appl Mater Interfaces. 2024 Mar 20;16(11):13756-13762. doi: 10.1021/acsami.3c19004. Epub 2024 Mar 11.
Many biomimetic microfibers have been designed from spider silk to collect water efficiently from humid air as a result of its periodic spindle-knot structure, which enhances the direct movement and convergence of captured fog droplets. Here, a hydrodynamic flow-focusing microfluidic device with a theta-shaped tube is designed for the one-step fabrication of bioinspired microfibers with a spindle-knot structure for fog harvest. The morphology of the structured microfibers, including height, width, and spacing of spindle knots, can be adjusted readily by regulating the flow rate of specific phases. The production rate of these structured microfibers can reach 1100 cm/min. Moreover, the capture, transportation, and collection performance of fog droplets on various microfibers are investigated in a fog collection platform. It is demonstrated that our one-step microfluidic device presents a ready method for the fabrication of structured microfibers with spindle knots, which provide a significant facilitation on efficient fog capture and water collection.
由于其周期性的纺锤结结构，许多仿生微纤维已被设计用于从潮湿空气中高效收集水分，这种结构增强了捕获的雾滴的直接移动和汇聚。在此，设计了一种带有θ形管的流体动力流动聚焦微流控装置，用于一步法制造具有纺锤结结构的仿生微纤维以进行雾收集。通过调节特定相的流速，可以轻松调整结构化微纤维的形态，包括纺锤结的高度、宽度和间距。这些结构化微纤维的生产速度可达1100厘米/分钟。此外，在雾收集平台上研究了雾滴在各种微纤维上的捕获、运输和收集性能。结果表明，我们的一步法微流控装置为制造具有纺锤结的结构化微纤维提供了一种简便方法，这对高效雾捕获和水收集有显著促进作用。
