Confinement-induced fluid-gel transition in polymeric solutions
C Haro-Pérez, A Garcia-Castillo, JL Arauz-Lara - Langmuir, 2009 - ACS Publications
C Haro-Pérez, A Garcia-Castillo, JL Arauz-Lara
Langmuir, 2009•ACS PublicationsThe viscoelastic properties of confined polymer solutions are probed by particle-tracking
microrheology. The mean squared displacement of spherical probe particles embedded in
the solution and the storage and loss moduli of the system are measured as the level of
confinement is increased. It is found that those quantities change continuously as the
confinement increases, and, at severe conditions, when the constrain reaches the size of the
polymer molecule, the system undergoes a transition from a viscoelastic fluid to a gel.
microrheology. The mean squared displacement of spherical probe particles embedded in
the solution and the storage and loss moduli of the system are measured as the level of
confinement is increased. It is found that those quantities change continuously as the
confinement increases, and, at severe conditions, when the constrain reaches the size of the
polymer molecule, the system undergoes a transition from a viscoelastic fluid to a gel.
The viscoelastic properties of confined polymer solutions are probed by particle-tracking microrheology. The mean squared displacement of spherical probe particles embedded in the solution and the storage and loss moduli of the system are measured as the level of confinement is increased. It is found that those quantities change continuously as the confinement increases, and, at severe conditions, when the constrain reaches the size of the polymer molecule, the system undergoes a transition from a viscoelastic fluid to a gel.
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