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Laser-Engraved Textiles for Engineering Capillary Flow and Application in Microfluidics.
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-06-08 , DOI: 10.1021/acsami.0c03988
Yifan Li 1 , Robert Fischer 1, 2, 3 , Robert Zboray 4 , Pierre Boillat 5 , Martin Camenzind 1 , Claudio Toncelli 1 , Rene M Rossi 1
Affiliation  

Steering capillary flow in textiles is of great significance in developing affordable and portable microfluidics devices. However, owing to the complex fibrous network, it remains a great challenge to achieve capillary flows with precise filling fronts. Here, an in situ laser engraving route is reported to accurately and rapidly etch textiles for manipulating capillary flow. The heterogeneity of the textile structure is enhanced because of the directional spreading of molten fibers polymer under the control of surface energy minimization. The principle of achieved anisotropic wicking of a water droplet in laser-engraved textiles is proposed. This understanding enables patterning the filling front of a fluid in different shapes, including arrow, straight line, diamond, and annulus. Precise capillary flow in textile-based microfluidics can benefit application in many fields, such as chemical analysis, biological detection, materials synthesis, multiliquid delivery. The laser engraving strategy has the advantages of simplicity, full scalability, and time rapidity, which provides an efficient avenue to steer capillary flow in diverse textiles for manufacturing customized microfluidic devices.

中文翻译:

工程毛细流的激光雕刻纺织品及其在微流体中的应用。

引导纺织品中的毛细管流动对开发负担得起的便携式微流体装置具有重要意义。然而,由于复杂的纤维网络,实现具有精确填充前沿的毛细管流仍然是一个巨大的挑战。在这里,据报道原位激光雕刻路线可以准确,快速地蚀刻纺织品,以控制毛细管流动。由于在表面能最小化的控制下熔融纤维聚合物的定向扩散,增强了纺织品结构的异质性。提出了在激光雕刻纺织品中实现水滴的各向异性芯吸的原理。这种理解使得能够以不同的形状(包括箭头,直线,菱形和环形)对流体的填充前沿进行构图。基于纺织品的微流体中精确的毛细管流动可有益于许多领域的应用,例如化学分析,生物检测,材料合成,多液体输送。激光雕刻策略具有简单,完全可扩展性和时间快速性的优点,这为在制造定制的微流控设备的各种纺织品中引导毛细管流动提供了有效途径。
更新日期:2020-07-01
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