Spreading of a suspension drop on a horizontal surface

Jeongin Han, Chongyoup Kim

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Experimental studies were performed on the contact line motion of a suspension of PS particles on a glass surface. The base liquids were silicone oil and glycerin. The particle size was in the range of 1-6 μm and the particle loading was 0.5-5 vol %. The drop shape was determined by using a drop image and its reflection and the drop outline was traced to the subpixel level. The Tanner-Voinov-Hoffman relation was valid for suspensions as well as for pure liquids. Silicone oil suspensions showed almost no noticeable change compared with the pure fluid. Glycerin suspensions showed an increase in contact line speed at low particle loading. The difference was due to the microstructure change at the contact line region, and the microstructure change was originated from the wetting characteristics of particles. Particle alignment occurred during the spreading stage for partially wetting particles. The contact line showed a stop-and-go fashioned motion due to surface irregularities. This result can be used as the boundary condition at the contact line in the numerical simulation of suspension spreading.

Original languageEnglish
Pages (from-to)2680-2689
Number of pages10
JournalLangmuir
Volume28
Issue number5
DOIs
Publication statusPublished - 2012 Feb 7

Fingerprint

Suspensions
Glycerol
Silicones
Wetting
Silicone Oils
Microstructure
Liquids
Contacts (fluid mechanics)
silicones
wetting
Particle size
Boundary conditions
oils
Glass
Fluids
Particle Size
Computer simulation
microstructure
liquids
irregularities

ASJC Scopus subject areas

  • Electrochemistry
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Materials Science(all)
  • Spectroscopy

Cite this

Spreading of a suspension drop on a horizontal surface. / Han, Jeongin; Kim, Chongyoup.

In: Langmuir, Vol. 28, No. 5, 07.02.2012, p. 2680-2689.

Research output: Contribution to journalArticle

Han, Jeongin ; Kim, Chongyoup. / Spreading of a suspension drop on a horizontal surface. In: Langmuir. 2012 ; Vol. 28, No. 5. pp. 2680-2689.
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