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Design of Nanofibrous and Microfibrous Channels for Fast Capillary Flow. | LitMetric

Design of Nanofibrous and Microfibrous Channels for Fast Capillary Flow.

Langmuir

Department of Fiber Science & Apparel Design, College of Human Ecology, Cornell University, Ithaca, New York 14853, United States.

Published: January 2018

AI Article Synopsis

Article Abstract

The speed of capillary flow is a key bottleneck in improving the performance of nanofluidic and microfluidic devices for various applications including microfluidic diagnostics, thermal management heat pipes, micromolding devices, functional fabrics, and oil-water separators. Here, we present a novel nanofibrous or microfibrous hollow-wedged channel (named as W-Channel), which can significantly speed up the capillary flow. The capillary flow in the initial 100 s in the nanofibrous W-Channel was shown to be 8 times faster than that in the single-layer strip of the same material when placed vertically and over 20 times faster when placed horizontally. The enhanced flow under gravity is attributed to the adaptive interplay of capillary pressure and flow resistance within the triangular hollow wedge between the fibrous layers. The W-Channel can be fabricated following a simple procedure using inexpensive materials such as electrospun nanofibers or microfibrous filter papers.

Download full-text PDF

Source
http://dx.doi.org/10.1021/acs.langmuir.7b01797DOI Listing

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