Factors controlling the pinning force of liquid droplets on liquid infused surfaces

Sadullah, Muhammad Subkhi, Panter, Jack R. ORCID: https://orcid.org/0000-0001-8523-7629 and Kusumaatmaja, Halim (2020) Factors controlling the pinning force of liquid droplets on liquid infused surfaces. Soft Matter, 16 (35). pp. 8114-8121. ISSN 1744-683X

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Abstract

Liquid infused surfaces with partially wetting lubricants have recently been exploited for numerous intriguing applications, such as for droplet manipulation, droplet collection and spontaneous motion. When partially wetting lubricants are used, the pinning force is a key factor that can strongly affect droplet mobility. Here, we derive an analytical prediction for contact angle hysteresis in the limit where the meniscus size is much smaller than the droplet, and numerically study how it is controlled by the solid fraction, the lubricant wetting angles, and the various fluid surface tensions. We further relate the contact angle hysteresis and the pinning force experienced by a droplet on a liquid infused surface, and our predictions for the critical sliding angles are consistent with existing experimental observations. Finally, we discuss why a droplet on a liquid infused surface with partially wetting lubricants typically experiences stronger pinning compared to a droplet on a classical superhydrophobic surface. This journal is

Item Type: Article
Additional Information: Funding Information: MSS is supported by an LPDP (Lembaga Pengelola Dana Pendidikan) scholarship from the Indonesian Government. JRP and HK acknowledge funding from EPSRC (grant EP/P007139/1) and Procter and Gamble. We thank to Dr Ciro Semprebon, Dr Yonas Gizaw and Dr Dan Daniel for the fruitful discussions. Publisher Copyright: © The Royal Society of Chemistry.
Uncontrolled Keywords: chemistry(all),condensed matter physics ,/dk/atira/pure/subjectarea/asjc/1600
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Depositing User: LivePure Connector
Date Deposited: 14 Sep 2022 15:30
Last Modified: 29 Sep 2022 19:32
URI: https://ueaeprints.uea.ac.uk/id/eprint/88293
DOI: 10.1039/d0sm00766h

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