Coalescence of particle-laden fluid interfaces.
Colloidal particles are capable of stabilizing emulsions and, thus, slowing or preventing their complete breakdown into phase-separated systems. Direct observations of the dynamics of such particles on both water and oil droplets are reported as two colloid-laden interfaces are brought into contact with each other. As coalescence proceeds, the complementary systems, representing oil-in-water and water-in-oil emulsions, exhibit contrasting mechanisms for the formation of ring and disk structures by the particles as they serve to temporarily stabilize the approaching surfaces. An explanation of such behavior leads to a better understanding of the stabilization and breaking mechanisms of so-called Pickering emulsions.
Stancik
Edward J
EJ
Department of Chemical Engineering, Stanford University, Stanford, California 94305, USA.
Kouhkan
Mehrnaz
M
Fuller
Gerald G
GG
D055598:Chemical Phenomena; D002627:Chemistry, Physical; D003102:Colloids / Q000737:chemistry*; D004655:Emulsions / Q000737:chemistry; D009821:Oils / Q000737:chemistry; D010316:Particle Size; D013499:Surface Properties; D013997:Time Factors; D014867:Water / Q000737:chemistry
D003102:Colloids; D004655:Emulsions; D009821:Oils; D014867:Water