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Author (up) Briceno-Ahumada, Z.; Drenckhan, W.; Langevin, D. doi  openurl
  Title Coalescence In Draining Foams Made of Very Small Bubbles Type Journal Article
  Year 2016 Publication Physical Review Letters Abbreviated Journal  
  Volume 116 Issue 12 Pages  
  Keywords  
  Abstract We studied the stability of foams containing small bubbles (radius less than or similar to 50 mu m). The foams are made from aqueous surfactant solutions containing various amounts of glycerol. The foams start breaking at their top, when the liquid volume fraction has decreased sufficiently during liquid drainage. Unlike in foams with larger bubbles, the liquid fraction at which the foam destabilizes is surprisingly high. In order to interpret this observation we propose that film rupture occurs during reorganization events (T1) induced by bubble coarsening, which is particularly rapid in the case of small bubbles. New films are therefore formed rapidly and if their thickness is too small, they cannot be sufficiently covered by surfactant and they break. Using literature data for the duration of T1 events and the thickness of the new films, we show that this mechanism is consistent with the behavior of the foams studied.  
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  ISSN 0031-9007 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number Admin @ benzerara @ Isi:000372727600010 Serial 14242  
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