Abstract
The hydrations of micelles of sodium lauryl sulfate and dodecyl and tetradecyl trimethyl ammonium chlorides have been estimated from viscosity data. The analysis of the viscosity data and the various corrections to be applied for obtaining the hydrations of the kinetically distinct micellar species are discussed. The estimated hydrations are compared with some theoretical predictions based on the “primary” hydration of the charged groups at the micellar surface. The agreement is fair. It is concluded that the formation of icelike hydration sheaths on hydrocarbon surfaces and the thickening of the shear layer on highly charged surfaces because of the viscoelectric effect are probably unimportant.
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