Effect of salts on local mobility and rheological properties of micelles of new long-chain surfactant |
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| Authors: | A M Vasserman M V Motyakin L L Yasina V G Vasil’ev L Z Rogovina |
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| Institution: | 1.Semenov Institute of Chemical Physics,Russian Academy of Sciences,Moscow,Russia;2.Nesmeyanov Institute of Organoelement Compounds,Russian Academy of Sciences,Moscow,Russia |
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| Abstract: | The effects of organic (sodium salicylate) and inorganic (KCl) salts on the rheological properties of micellar solutions and
the local characteristics (local mobility and ordering) of micelle cores is studied for a cationic surfactant containing a
long (C18) unsaturated alkyl radical. The polar head of the surfactant contains two hydroxyl groups. The local characteristics are
determined employing spin probe ESR spectroscopy. It is shown that the incorporation of a salt into a micellar solution reduces
the local mobility of radicals of surfactant molecules in micelle cores and increases their local Lordering and the viscosity
of the solution. Sodium salicylate has a stronger influence on the solution viscosity and the local characteristics of micelle
cores than KCl does. Variations in the local characteristics of micelle cores under the action of the salts are in close correlation
with variations in the rheological properties of the micellar solutions. |
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