Mechanical pinning of liquids through inelastic wetting ridge formation on thermally stripped acrylic polymers

A film composed of a thermal-stripped, solvent-borne acrylic polymer is shown to completely arrest motion of the three-phase line for water as a result of ridge structure formation. This mechanism produces anomalous wetting behavior including the arbitrary selection of contact angles, formation of q...

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Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1992. - 23(2007), 24 vom: 20. Nov., Seite 12142-6
1. Verfasser: Pu, Gang (VerfasserIn)
Weitere Verfasser: Guo, Jihui, Gwin, Larry E, Severtson, Steven J
Format: Aufsatz
Sprache:English
Veröffentlicht: 2007
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article Research Support, U.S. Gov't, Non-P.H.S. Acrylic Resins Surface-Active Agents Water 059QF0KO0R
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520 |a A film composed of a thermal-stripped, solvent-borne acrylic polymer is shown to completely arrest motion of the three-phase line for water as a result of ridge structure formation. This mechanism produces anomalous wetting behavior including the arbitrary selection of contact angles, formation of quasi-periodic ridge structures on surfaces, and requirement of stick and break motion for wetting line advancement, a novel mechanism reported here. The ridges are retained by the polymer subsequent to wetting, which are 2 scales larger in height than those described previously. This allows for their characterization, which shows significant detail including the hierarchical apex structure where a cutoff area is used in theoretical treatment to avoid a singularity. Results of Wilhelmy plate experiments show a spatial connection between quasi-periodic variation in force-displacement curves and the wetting ridges on plate. These results are consistent with the dominance of the viscoelastic properties of the substrate in determining wetting behavior 
650 4 |a Journal Article 
650 4 |a Research Support, U.S. Gov't, Non-P.H.S. 
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700 1 |a Guo, Jihui  |e verfasserin  |4 aut 
700 1 |a Gwin, Larry E  |e verfasserin  |4 aut 
700 1 |a Severtson, Steven J  |e verfasserin  |4 aut 
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