Shear-thickening surfactants

Keywords Instabilities under shear Lyotropic mesophases Shear-banding Shear-thickening Surfactant Viscoelasticity Wormlike micelles... 

A remarkable property of the shear-induced phase is its flow birefringence. Flow birefringence experiments on shear-thickening surfactant solutions were introduced... 

Oda R, Weber V, Lindner P, Pine D, Mendes E, Schloesser F (2000) Time-resolved smaU-angle neutron scattering study of shear-thickening surfactant solutions after the cessation of flow. Langmuir 14 4859-4863... 

Berret JF, Gamez-Corrales R, Oberdisse J, Walker LM, Lindner P (1998a) Flow-structure relationship of shear-thickening surfactant solutions. Europhys Lett 41 677-682... 

Bandyopadhyay R, Sood AK (2001) Chaotic dynamics in shear-thickening surfactant solutions. Europhys Lett 56(3) 447-453... 

Hu, Y, Wang, S. Q., and Jamieson, A. M., Rheological and flow birefringence studies of a shear-thickening complex fluid a surfactant model system, /. RheoL, 37,531-546 (1993b). 

Some types of Gemini surfactants with a short spacer have some special rheological properties such as viscoelasticity and shear-thickening at relatively low concentration when they are dissolved in water. 

The review is organized as follows Sect. 2 deals with the shear-thickening behavior found in dilute and very dilute surfactant solutions. Section 3 examines the shear-banding instability and the isotropic-to-nematic transition revealed in the semidilute and concentrated regimes, respectively. The last part focuses on the wormlike micellar nematics under shear, and emphasizes the analogy with liquid-crystalline polymers. 

In this part, we are dealing with the shear-thickening transition in dilute surfactant solutions. Only solutions with zero-shear viscosity close to that of the solvent and for which no apparent viscoelasticity is observed at rest will be considered. Systems showing both viscoelasticity and shear-thickening have also been found and wiU be evoked in the part devoted to the semidilute regime. 

Shear-thickening occurs for surfactants that self-assemble into cylindrical micelles. 

In comparison with the total number of surfactants available by now, only a few of them exhibit a shear-thickening transition in accordance with points 1-5 above. Table 1 lists these systems, with their counterions and/or their hydrotopes. In Table 1 it can be seen that all the surfactants are cationic and that the number of carbon atoms ranges from 13 to 18 per elementary charge. Most of the rheological... 

Table 1 List of surfactants and additives found to exhibit shear-thickening described by points 1-5. Column 4 makes an inventory of the experimental techniques employed to investigate the SIS...

Fig. 9 Schematic diagram accounting for the shear-thickening transition in dilute surfactant solutions...

Note that rheochaos has also been observed in solutions of mixed anionic-zwitterionic surfactants [220] and in other systems including shear-thickening wormlike micelles [239], lamellar, onion, and sponge surfactant phases [156,240-243] and dense colloidal suspensions [244]. 

Dehmoune J, Decruppe J, GreflBer O, Xu H (2007) Rheometric and rheo-optical investigation on the effect of the aliphatic chain length of the surfactant on the shear thickening of dilute wormlike micellar solutions. Rheol Acta 46(8) 1121-1129... 

Vasudevan M, Shen A, Khomami B, Sureshkumar R (2008) Self-similar shear thickening behavior in ctab/nasal surfactant solutions. J Rheol 52(2) 527-550... 

Berret JF, Lerouge S, Decruppe J (2002) Kinetics of the shear-thickening transition observed in dilute surfactant solutions and investigated by flow birefringence. Langmuir 18 7279-7286... 

Berret JF, Gamez-Corrales R, Lerouge S, Decruppe J (2000a) Shear-thickening transition in surfactant solutions new experimental features from rheology tmd flow birefringence. Eur... 

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