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Title: Dynamic air/liquid pockets for guiding microscale flow

Journal Article · · Nature Communications

Microscale flows of fluids are mainly guided either by solid matrices or by liquid–liquid interfaces. Yet, the solid matrices are plagued with persistent fouling problems, while liquid–liquid interfaces are limited to low-pressure applications. Here we report a dynamic liquid/solid/gas material containing both air and liquid pockets, which are formed by partially infiltrating a porous matrix with a functional liquid. Using detailed theoretical and experimental data, we show that the distribution of the air- and liquid-filled pores is responsive to pressure and enables the formation and instantaneous recovery of stable liquid–liquid interfaces that sustain a wide range of pressures and prevent channel contamination. This adaptive design is demonstrated for polymeric materials and extended to metal-based systems that can achieve unmatched mechanical and thermal stability. Our platform with its unique adaptive pressure and antifouling capabilities may offer potential solutions to flow control in microfluidics, medical devices, microscale synthesis, and biological assays.

Research Organization:
Harvard Univ., Cambridge, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC); National Natural Science Foundation
Grant/Contract Number:
SC0005247
OSTI ID:
1526293
Journal Information:
Nature Communications, Vol. 9, Issue 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 50 works
Citation information provided by
Web of Science

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Cited By (9)

Enhanced voltage generation through electrolyte flow on liquid-filled surfaces journal October 2018
Slippery Surface Based on Photoelectric Responsive Nanoporous Composites with Optimal Wettability Region for Droplets' Multifunctional Manipulation journal November 2018
A liquid-based Janus porous membrane for convenient liquid–liquid extraction and immiscible oil/water separation journal January 2019
Droplet dynamics on slippery surfaces: small droplet, big impact journal June 2019
Research Update: Liquid gated membrane filtration performance with inorganic particle suspensions journal October 2018
Two dimensional nanomaterial‐based separation membranes journal March 2019
Inner Surface Design of Functional Microchannels for Microscale Flow Control journal October 2019
An alginate active layer of polyether sulfone membrane suppresses algae-fouling in repeated filtration of Chlorella vulgaris for a higher recovery of water permeation flux journal January 2019
Thermoresponsive Graphene Membranes with Reversible Gating Regularity for Smart Fluid Control journal February 2019

Figures / Tables (5)


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