Rheology of Lyotropic Liquid Crystals of Aerosol OT: III. Effect of Salt and Hydrocarbons

✍ Scribed by O. Robles-Vasquez; J.F.A. Soltero; J.E. Puig; O. Manero

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 213 KB
• Volume: 163
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1994.1122

✦ Synopsis

The rheological behavior of AOT/water liquid crystalline phases containing (\mathrm{NaCl}) or decane is examined here. Strong effects are noted on the elastic and loss moduli as well as on the complex and dynamic viscosities, even at low salt or decane content. Lamellar phases behave as weak gels; i.c., (G^{\prime}) and (G^{\prime \prime}) are very weak functions of frequency in the range (10^{-1}-10^{2} \mathrm{rad} /) s, (G^{\prime}>G^{\prime \prime}), and (\eta^{*}) is proportional to (\omega^{-1}). These effects are explained in terms of intramolecular and colloidal forces that govern the formation of bilayers and other surfactant fluid microstructures. 1994 Academic Press. Imc.