Programmable Knot Microfibers from Piezoelectric Microfluidics.
Programmable Knot Microfibers from Piezoelectric Microfluidics.
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DOI：
10.1002/smll.202104309
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发表时间：
2021-11
期刊：
影响因子：
13.3
通讯作者：
Chaoyu Yang;Yunru Yu;Xiaocheng Wang;Luoran Shang;Yuanjin Zhao
中科院分区：
文献类型：
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作者：
Chaoyu Yang;Yunru Yu;Xiaocheng Wang;Luoran Shang;Yuanjin Zhao
超细纤维在许多领域都显示出重要的应用价值。目前的努力集中在开发新技术，以制备具有可控形态和结构特征的微纤维，以增强其功能。在这里，压电微流控平台，提出了连续纺纱功能微纤维与可编程的主轴结。在该平台中，在通道中流动的预凝胶溶液的射流可以经受可编程压电信号并且同步振动。在波形射流的快速聚合之后，可以产生具有相应形态的微纤维，包括均匀的、梯度的和对称的结。这种独特的结结构有助于水收集机构。因此，已经观察到，具有程序化结的微纤维能够实现甚至更灵活的液滴处理和主动水输送。此外，通过构建更高阶的结纤维网络，包括喷雾反应、芯片实验室蒸气检测等实际应用，也可以证明。据信，该平台为纤维纺丝开辟了新的途径，可编程微纤维将在化学、生物医学和环境领域得到高度应用。
Microfibers have demonstrated significant application values in a large number of areas. Current efforts focus on developing new technologies to prepare microfibers with controllable morphological and structural features to enhance their functions. Here, a piezoelectric microfluidic platform is presented for consecutive spinning of functional microfibers with programmable spindle-knots. In this platform, a jet of a pregel-solution flowing in the channel can be subjected to a programmable piezoelectric signal and vibrates synchronously. Following a rapid polymerization of the wavy jet, microfibers with corresponding morphologies can be generated, including uniform, gradient, and symmetrical knots. Such a unique knot structure contributes to a water-collection mechanism. Thus, it has been observed that microfibers with programmed knots enable even more flexible droplet handling and active water transport. In addition, by constructing higher-order knot fiber networks, practical applications including spray reaction, lab-on-a-chip vapor detection, etc., can also be demonstrated. it is believed that this platform opens a new avenue for fiber spinning, and the programmable microfibers would be highly applicable in chemical, biomedical, and environmental areas.