title: A master dynamic flow diagram for the shear thickening transition in micellar solutions.
abstract: The shear thickening behavior of dilute micellar solutions of hexadecyltrimethylammonium-type surfactants with different counterions (tosylate, 3- and 4-fluorobenzoate, vinylbenzoate and salicylate) and of n-alkyltetradecylammonium bromide (CnTAB), with n = 14, 16 and 18, is examined here. These solutions undergo a shear thickening transition due to the formation of shear-induced structures (SISs) in the shear range studied. Here we report a relationship between the shear thickening intensity and the differences in the hydrophobicity of counterions according to the Hofmeister-like anion series, which leads to a master flow diagram. This master flow diagram is produced by plotting a normalized shear thickening intensity (Iη - 1)/(Imax - 1) versus CD/CD,max, where Iη is the shear-thickening intensity, defined as the largest viscosity obtained in the shear-thickening transition (STT) at a given surfactant concentration CD divided by the Newtonian viscosity η0, and Imax is the largest intensity value obtained in the STT at a surfactant concentration CD,max. The master flow diagram is built using several cetyltrimethylammonium-type surfactants with different counterions, according to a Hofmeister-like series, and by n-alkyltetradecylammonium bromide surfactants with different alkyl chain lengths.
authors.affiliation: Departamentos de Física, Universidad de Guadalajara, Boul. M. García Barragán #1451, Guadalajara, Jal. 44430, Mexico.
authors.forename: F
authors.initials: F
authors.lastname: Bautista
authors.affiliation: Departamento de Ingeniería Química, Benemérita Universidad Autónoma de Puebla, Ave. San Claudio y 18 Sur, Puebla, Pue. 72000, Mexico.
authors.forename: N
authors.initials: N
authors.lastname: Tepale
authors.affiliation: Departamento de Ciencias Tecnológicas, Universidad de Guadalajara, Av. Universidad #1115, Ocotlán, Jal. 47820, Mexico.
authors.forename: V V A
authors.initials: VV
authors.lastname: Fernández
authors.affiliation: Departamento de Ingeniería Química, Universidad de Guadalajara, Boul. M. García Barragán #1451, Guadalajara, Jal. 44430, Mexico. elena.hernandez@ymail.com elena.hernandez@cucei.udg.mx.
authors.forename: G
authors.initials: G
authors.lastname: Landázuri
authors.affiliation: Departamento de Ingeniería Química, Universidad de Guadalajara, Boul. M. García Barragán #1451, Guadalajara, Jal. 44430, Mexico. elena.hernandez@ymail.com elena.hernandez@cucei.udg.mx.
authors.forename: E
authors.initials: E
authors.lastname: Hernández
authors.affiliation: Departamento de Ingeniería Química, Universidad de Guadalajara, Boul. M. García Barragán #1451, Guadalajara, Jal. 44430, Mexico. elena.hernandez@ymail.com elena.hernandez@cucei.udg.mx.
authors.forename: E R
authors.initials: ER
authors.lastname: Macías
authors.affiliation: Departamento de Ingeniería Química, Universidad de Guadalajara, Boul. M. García Barragán #1451, Guadalajara, Jal. 44430, Mexico. elena.hernandez@ymail.com elena.hernandez@cucei.udg.mx.
authors.forename: J F A
authors.initials: JF
authors.lastname: Soltero
authors.affiliation: Departamento de Química, Universidad de Guadalajara, Boul. M. García Barragán #1451, Guadalajara, Jal. 44430, Mexico.
authors.forename: J I
authors.initials: JI
authors.lastname: Escalante
authors.affiliation: Instituto de Investigación en Materiales, Universidad Nacioal Autónoma de Mexico, Apdo. Postal 70-360, Mexico D.F. 04510, Mexico.
authors.forename: O
authors.initials: O
authors.lastname: Manero
authors.affiliation: Departamento de Ingeniería Química, Universidad de Guadalajara, Boul. M. García Barragán #1451, Guadalajara, Jal. 44430, Mexico. elena.hernandez@ymail.com elena.hernandez@cucei.udg.mx.
authors.forename: J E
authors.initials: JE
authors.lastname: Puig