Li Ziwei, Cui Zhiwen, Zhao Lihao, Hussain Naveed, Zhao Yanzhen, Yang Cheng, Jiang Xinyu, Li Lei, Song Jianan, Zhang Baopu, Cheng Zekun, Wu Hui
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
Applied Mechanics Laboratory, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China.
Sci Adv. 2022 Mar 18;8(11):eabn3690. doi: 10.1126/sciadv.abn3690. Epub 2022 Mar 16.
The interaction between gas flow and liquid flow, governed by fluid dynamic principles, is of substantial importance in both fundamental science and practical applications. For instance, a precisely designed gas shearing on liquid solution may lead to efficacious production of advanced nanomaterials. Here, we devised a needleless Kármán vortex solution blow spinning system that uses a roll-to-roll nylon thread to deliver spinning solution, coupled with vertically blowing airflow to draw high-quality nanofibers with large throughput. A wide variety of nanofibers including polymers, carbon, ceramics, and composites with tunable diameters were fabricated at ultrahigh rates. The system can be further upgraded from single thread to multiple parallel threads and to the meshes, boosting the production of nanofibers to kilogram scale without compromising their quality.
气流与液流之间的相互作用遵循流体动力学原理，在基础科学和实际应用中都具有至关重要的意义。例如，对液体溶液进行精确设计的气体剪切可能会有效生产先进的纳米材料。在此，我们设计了一种无针卡门涡旋溶液吹纺系统，该系统使用卷对卷尼龙线输送纺丝溶液，并结合垂直吹气气流以高产量拉出高质量的纳米纤维。以超高速度制造了包括聚合物、碳、陶瓷以及直径可调的复合材料在内的多种纳米纤维。该系统可以进一步从单线程升级为多根并行线并最终升级为网，在不影响纳米纤维质量的情况下将其产量提高到千克规模。
