Impacting the length of wormlike micelles using mixed surfactant systems

Langmuir : the ACS Journal of Surfaces and Colloids
Vania CroceGöran Karlsson

Abstract

The effect of adding an alcohol ethoxylate nonionic surfactant (C(18)E(18)) to aqueous solutions of a cationic surfactant, erucyl bis(hydroxyethyl) methylammonium chloride (EHAC,CH(3)(CH(2))(7)(CH)(2)(CH(2))(12)N(+)-(CH(2)CH(2)OH)(2)CH(3)Cl(-)), was studied using small-angle neutron scattering (SANS), steady-state rheology, and cryo-transmission electron microscopy (Cryo-TEM). This cationic surfactant has the ability to self-assemble into giant wormlike micelles in the presence of an electrolyte, such as KCl. In salt-free solutions, the mixture of the two surfactants gave rise to spherical micelles. The scattering curves obtained were fitted with a polydisperse core-shell model combined with a Hayter Penfold potential. The inner and outer radii were found to be dependent on the surfactant ratio. In the presence of KCl, mixed wormlike micelles were formed. However, further addition of C(18)E(18) promoted the breaking of the micellar worms with the appearance of a structure peak in the scattering curves. In addition, it was found that the low shear viscosity is decreased upon addition of the alcohol ethoxylate nonionic surfactant. These findings are in good qualitative agreement with the Cryo-TEM images. The results show that the...Continue Reading

References

Jan 15, 1997·Journal of Colloid and Interface Science·J PenfoldP Cummins

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Citations

Oct 24, 2009·Physical Chemistry Chemical Physics : PCCP·Lijuan WangJinfeng Dong
Jul 26, 2005·Journal of Colloid and Interface Science·Carlos Rodriguez-AbreuHironobu Kunieda
Jan 24, 2012·International Journal of Pharmaceutics·Hiromasa UchiyamaHirofumi Takeuchi
May 10, 2017·Journal of Colloid and Interface Science·Timothy J SmithNicholas L Abbott
May 14, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Alberto Rodríguez-PulidoEmilio Aicart
Dec 28, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Vyacheslav S MolchanovAlexander I Kuklin
Jun 22, 2010·Chemical Reviews·Renhao Dong, Jingcheng Hao
Jun 27, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Kenji AramakiLok Kumar Shrestha
Feb 9, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Julia A ShashkinaInessa V Blagodatskikh

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