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Titolo:
Shear-thickening transition in surfactant solutions: New experimental features from rheology and flow birefringence
Autore:
Berret, JF; Gamez-Corrales, R; Lerouge, S; Decruppe, JP;
Indirizzi:
Univ Montpellier 2, Dynam Phases Condensees Grp, CNRS, UMR 5581, F-34095 Montpellier 05, France Univ Montpellier 2 Montpellier France 05 F-34095 Montpellier 05, France Univ Metz, Grp Rheophys Colloides, F-57078 Metz, France Univ Metz Metz France F-57078 p Rheophys Colloides, F-57078 Metz, France
Titolo Testata:
EUROPEAN PHYSICAL JOURNAL E
fascicolo: 4, volume: 2, anno: 2000,
pagine: 343 - 350
SICI:
1292-8941(200008)2:4<343:STISSN>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
INDUCED MICELLAR STRUCTURES; WORMLIKE MICELLES; PHASE; BEHAVIOR; INSTABILITY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Berret, JF Univ Montpellier 2, Dynam Phases Condensees Grp, CNRS, UMR 5581, F-34095 Montpellier 05, France Univ Montpellier 2 Montpellier France 05ntpellier 05, France
Citazione:
J.F. Berret et al., "Shear-thickening transition in surfactant solutions: New experimental features from rheology and flow birefringence", EUR PHY J E, 2(4), 2000, pp. 343-350

Abstract

We report on the shear-thickening transition observed in dilute aqueous solutions of cetyltrimethylammonium tosylate (CTAT) at concentrations phi similar to 0.2%. We have re-examined the kinetics of the shear-thickening transition using start-up experiments at rates above the critical shear rate (gamma) over dot(c). Using simple well-defined protocols, we have found that the transient mechanical response depends dramatically on the thermal and on the shear histories. Using the same protocols, flow birefringence experiments were carried out. The gap of a Couette cell containing the sheared solution has been visualized between crossed polarizers in steady shear conditions, as well as in start-up experiments. We show that the birefringent sheer-induced phase starts from the inner cylinder and grows along the velocity gradient direction, as in a shear banding situation. However, around (gamma) over dot(c) we have not observed a regime of phase coexistence (isotropic and birefringent).

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/07/20 alle ore 05:27:40