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Thixotropic Suspensions of Self‐Assembled Steroid Nanotubes: Structures, Kinetics and Rheological Specificities
Author(s) -
Terech Pierre,
Friol Séverine
Publication year - 2006
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200650914
Subject(s) - thixotropy , rheology , materials science , kinetics , shearing (physics) , newtonian fluid , aqueous solution , chemical engineering , composite material , thermodynamics , chemistry , classical mechanics , physics , engineering
Characteristic structural, kinetical and rheological behaviors observed with alkaline aqueous suspensions of sodium lithocholate nanotubes are presented. The scaling behavior of the elastic shear modulus and yield stress as a function of concentration support the description of the fragile network with degrees of freedom at the hinges. The kinetics of nanotube formation mixes a component of the structural sequence for single aggregates and a collective component describing the relaxation of the distribution of tubes. SLC suspensions are easily shear‐thinned (and oriented) in purely Newtonian shearing conditions.