Dynamic Stratification in Drying Films of Colloidal Mixtures.

نویسندگان

  • Andrea Fortini
  • Ignacio Martín-Fabiani
  • Jennifer Lesage De La Haye
  • Pierre-Yves Dugas
  • Muriel Lansalot
  • Franck D'Agosto
  • Elodie Bourgeat-Lami
  • Joseph L Keddie
  • Richard P Sear
چکیده

In simulations and experiments, we study the drying of films containing mixtures of large and small colloidal particles in water. During drying, the mixture stratifies into a layer of the larger particles at the bottom with a layer of the smaller particles on top. We developed a model to show that a gradient in osmotic pressure, which develops dynamically during drying, is responsible for the segregation mechanism behind stratification.

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عنوان ژورنال:
  • Physical review letters

دوره 116 11  شماره 

صفحات  -

تاریخ انتشار 2016