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Infiltration and dimensional scaling of inkjet droplets on thick isotropic porous materials
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Polymer och fiber.ORCID iD: 0000-0003-3110-3646
2014 (English)In: Microfluidics and Nanofluidics, ISSN 1613-4982, E-ISSN 1613-4990, Vol. 17, no 2, p. 413-422Article in journal (Refereed) Published
Abstract [en]

We study the imbibition of picoliter (pL)-sized inkjet droplets on controlled pore glass membranes (CPG), as a suitable model for isotropic three-dimensional porous materials. We do so using a variety of liquids, i.e., water, formamide and diiodomethane, and measure the evolution of the imbibition process using high-speed digital imaging. Here, experiments were conducted on 2-280 nm CPG membranes with drops with initial volumes ranging from 100 to 600 pL. We derive scaling laws for imbibition through dimensional analysis and advance the argument that the rate of absorption is related to two-dimensionless groups V = v(t)ε/vtot; T = tkpc/μ(ε/v tot)2/3, where v(t) is the imbibed volume, as determined from experiments, t is the time, v tot the total liquid volume, ε the porosity, μ the liquid viscosity, k the permeability, and p c the Laplace capillary pressure. We show this scaling to well describe the system at intermediate T values and report that V ∝ T 0.8.

Place, publisher, year, edition, pages
2014. Vol. 17, no 2, p. 413-422
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Natural Sciences
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URN: urn:nbn:se:ri:diva-6699DOI: 10.1007/s10404-013-1313-7Scopus ID: 2-s2.0-84904822647Local ID: 23694OAI: oai:DiVA.org:ri-6699DiVA, id: diva2:964539
Available from: 2016-09-08 Created: 2016-09-08 Last updated: 2019-08-09Bibliographically approved

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Oko, Asaf

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CiteExportLink to record
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