The effect of hydrostatic pressure on micelle size and crystallization

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Abstract
The effects of hydrostatic pressure in the range 1–1200 atm on both the mean hydrodynamic radius and the critical micellar temperature of sodium dodecyl sulfate (SDS) micelles in aqueous NaCl solutions have been determined using quasielastic light scattering techniques. The mean hydrodynamic radius decreases monotonically with pressure for all temperatures investigated in the range 30–45 °C. The critical micellar temperature increases monotonically by approximately 13 °C over the same pressure range. The data on both micellar sizes and critical micellar temperatures are consistently interpreted entirely in terms of the effect of pressure and temperature on the fundamental chemical potentials.