Journal
LANGMUIR
Volume 30, Issue 19, Pages 5455-5459Publisher
AMER CHEMICAL SOC
DOI: 10.1021/la5005159
Keywords
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Funding
- Royal Society University Research Fellowship
- EPSRC [EP/L003651/1, EP/H004939/1]
- Engineering and Physical Sciences Research Council [EP/L003651/1, EP/H004939/1] Funding Source: researchfish
- EPSRC [EP/H004939/1, EP/L003651/1] Funding Source: UKRI
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The forced dewetting of water and dilute poly(ethylene oxide) solution (PEO) drops is investigated for syringe-driven flow. Comparisons are made with the free dewetting observed during drop impact. We provide strong evidence that during droplet retraction, polymer deposited on the substrate results in a velocity-dependent force at the contact line. These findings are in stark contrast to previous studies which attributed dissipation to bulk viscoelastic effects or normal stress effects at the contact line.
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