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Spreading of oil droplets on silicon oxide surfaces with parallel v-shaped channels
YKI – Ytkemiska institutet.
YKI – Ytkemiska institutet.
1996 (English)In: Colloids and Surfaces B: Biointerfaces, ISSN 0927-7765, E-ISSN 1873-4367, Vol. 116, 135-144 p.Article in journal (Refereed)
Abstract [en]

The spreading of silicone oil and paraffin oil has been studied on two energetically and chemically different smooth surfaces (gold and polystyrene). It was found that for these surfaces neither the surface tension nor the surface free energy influenced the spreading behaviour of the oils. The data for the two different liquids can be transposed onto a master curve when the product of velocity and viscosity is plotted versus the dynamic contact angle. Spreading of paraffin oil droplets where also studied on a set of silicone oxide surfaces containing parallel v-shaped surface channels at various widths and spacings. It was found that the sharp edges of the channel walls strongly affected spreading and that droplet shape was distorted from the usual circular shape displayed on a smooth surface. Ån elongated droplet was formed with the contact line following a channel edge and with the short sides having a semi-circular shape. Traverse spreading was very slow and decreased as the spacing was decreased. Increased channel size and decreased spacing produced an increase in spreading velocity in the direction of the channels.

Place, publisher, year, edition, pages
1996. Vol. 116, 135-144 p.
Keyword [en]
Dynamic contact angle, dynamic wetting, liquid spreading, oil droplets, paraffin oil, silicon oxide, silicone oil, surface free energy, surface structures, surface tension
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-26494OAI: oai:DiVA.org:ri-26494DiVA: diva2:1053496
Note
A979Available from: 2016-12-08 Created: 2016-12-08Bibliographically approved

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