Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Oscillatory Reversible Osmotic Growth of Sessile Saline Droplets on the Floating Polydimethylsiloxane Membrane

Version 1 : Received: 8 May 2021 / Approved: 10 May 2021 / Online: 10 May 2021 (10:23:50 CEST)

How to cite: Roy, P.K.; Shoval, S.; Dombrovsky, L.A.; Bormashenko, E. Oscillatory Reversible Osmotic Growth of Sessile Saline Droplets on the Floating Polydimethylsiloxane Membrane. Preprints 2021, 2021050159 (doi: 10.20944/preprints202105.0159.v1). Roy, P.K.; Shoval, S.; Dombrovsky, L.A.; Bormashenko, E. Oscillatory Reversible Osmotic Growth of Sessile Saline Droplets on the Floating Polydimethylsiloxane Membrane. Preprints 2021, 2021050159 (doi: 10.20944/preprints202105.0159.v1).

Abstract

We report cyclic growth/retraction phenomena observed for saline droplets placed on the cured PDMS membrane with the thickness of 7.8±0.1 µm floating on pure water surface. Osmotic mass transport across the micro-scaled floating PDMS membrane provided the growth of the sessile saline droplets followed by evaporation of the saline droplets. The observed growth/retraction cycle was reversible. The model of the osmotic mass transfer across the cured PDMS membrane is suggested. The model explains semi-quantitatively the time evolution of a droplet.

Subject Areas

osmotic membrane; Polydimethylsiloxane; saline droplet; mass transport; evaporation; reversible cycle.

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