WATER DYNAMICS IN AMPHIPHILES AND ALCOHOLIC SOLUTIONS

Light scattering studies of water properties in aqueous solutions of p olyoxyethylene non-ionic amphiphiles C10E5 and methanol are presented. Depolarized Raylegh spectra are studied to obtain the rotational rela xational time of water, whereas Brillouin scattering is used to have d etails on the sound propagation. The systems are studied for different temperatures and concentrations. Data analysis reveals that the solut es (amphiphile and alcohol) molecular head groups (hydrophilic and hyd rophobic) have relevant effects on the water dynamics and structure. ( C) 1998 Elsevier Science B.V. All rights reserved.