Influence of an adsorbing polymer on the aging dynamics of Laponite clay suspensions (Articolo in rivista)

Type
Label
  • Influence of an adsorbing polymer on the aging dynamics of Laponite clay suspensions (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1080/14786430802581876 (literal)
Alternative label
  • Zulian, L; Ruzicka, B; Ruocco, G (2008)
    Influence of an adsorbing polymer on the aging dynamics of Laponite clay suspensions
    in Philosophical magazine (2003, Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Zulian, L; Ruzicka, B; Ruocco, G (literal)
Pagina inizio
  • 4213 (literal)
Pagina fine
  • 4221 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 88 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • \"[Zulian, L.; Ruzicka, B.; Ruocco, G.] Univ Roma La Sapienza, Dipartimento Fis, Rome, Italy; [Zulian, L.; Ruzicka, B.; Ruocco, G.] Univ Roma La Sapienza, INFM, CRS, SOFT, Rome, Italy (literal)
Titolo
  • Influence of an adsorbing polymer on the aging dynamics of Laponite clay suspensions (literal)
Abstract
  • Clay-polymer dispersions in aqueous solutions are of great interest due to their industrial applications and intriguing physical properties. Aqueous solutions of bare Laponite particles age spontaneously, from an ergodic to a non-ergodic state, in a time varying from hours to months depending on Laponite concentration. When a polymer species, such as polyethylene oxide (PEO), is added to the solution, it weakly adsorbs on clay particle surfaces modifying the effective interaction potential between Laponite particles. A dynamic light-scattering study was performed to investigate the effect of polymer on the aging dynamics of the system by varying the polymer concentration at a fixed polymer molecular weight (M-w = 200,000 g/mol). The results show that arresting phenomena between clay particles are hindered when PEO is added and, thus, a slowing of the aging dynamics with increasing PEO concentration is observed. A possible mechanism is progressive coverage of the clay surface by polymers, which grow with increasing PEO concentration. (literal)
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