2014
DOI: 10.1016/j.colsurfa.2012.10.049
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The effects of molecular weight, evaporation rate and polymer concentration on pillar formation in drying poly(ethylene oxide) droplets

Abstract: Typically, when droplets of dilute suspensions are left to evaporate the final dry deposit is the familiar coffee-ring stain, with nearly all the solute deposited at the initial contact line. Contrastingly, in previous work we have shown that sessile droplets of poly(ethylene oxide) (PEO) solutions form tall central pillars (or monoliths) during a 4-stage drying process. We show that a dimensionless Péclet-type number P e, a ratio of the competing advective and diffusive motion of the dissolved polymer, which … Show more

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Cited by 21 publications
(40 citation statements)
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“…Even though we did not include the result of PEO solution, we observed similar Marangoni vortex for PEO, which was also observed in a previous study 31 . In fact, PEO has the same chemical structure as PEG but relatively large molecular weight (MW = 600,000, Sigma-Aldrich, USA).…”
Section: Discussionsupporting
confidence: 84%
“…Even though we did not include the result of PEO solution, we observed similar Marangoni vortex for PEO, which was also observed in a previous study 31 . In fact, PEO has the same chemical structure as PEG but relatively large molecular weight (MW = 600,000, Sigma-Aldrich, USA).…”
Section: Discussionsupporting
confidence: 84%
“…This behavior is reminiscent of the contraction stage seen in pillar formation in evaporating polymer droplets by Baldwin and Fairhurst (2014). 5.…”
Section: Creeping Salt Dropletsmentioning
confidence: 78%
“…They concluded that the drying behaviour of these droplets were defined by three critical factors; initial concentration, droplet geometry and evaporation rate. 29 In the latest work of Baldwin et al 30…”
Section: Besides Single Component Fluids and Colloidal Suspensions Dmentioning
confidence: 99%