Imaging internal flows in a drying sessile polymer dispersion drop using Spectral Radar Optical Coherence Tomography (SR-OCT)

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:395

Article

Manukyan, Selin^1,2  Sauer, Hans M.³  Roisman, Ilia V.^1,2  Baldwin, Kyle A.⁴  Fairhurst, David J.⁴  Liang, Haida⁴  Venzmer, Joachim⁵  Tropea, Cameron^1,2 

[1] Tech Univ Darmstadt, Inst Fluid Mech & Aerodynam, D-64287 Darmstadt, Germany

[2] Ctr Smart Interfaces, D-64287 Darmstadt, Germany

[3] Tech Univ Darmstadt, Inst Printing Sci & Technol, D-64289 Darmstadt, Germany

[4] Nottingham Trent Univ, Sch Sci & Technol, Nottingham NG11 8NS, England

[5] Evon Ind AG, D-45127 Essen, Germany

关键词: OCT;    Polymer dispersion;    Internal flows;   

DOI  :  10.1016/j.jcis.2012.11.037

来源: Elsevier

【 摘 要 】

In this work, we present the visualization of the internal flows in a drying sessile polymer dispersion drop on hydrophilic and hydrophobic surfaces with Spectral Radar Optical Coherence Tomography (SR-OCT). We have found that surface features such as the initial contact angle and pinning of the contact line, play a crucial role on the flow direction and final shape of the dried drop. Moreover, imaging through selection of vertical slices using optical coherence tomography offers a feasible alternative compared to imaging through selection of narrow horizontal slices using confocal microscopy for turbid, barely transparent fluids. (C) 2012 Elsevier Inc. All rights reserved.

【 授权许可】

Free