Add time:08/15/2019 Source:sciencedirect.com
Binding of Dodecylpyridinium chloride (cas 104-74-5) to poly(styrene sulfonate) in ethanol-water mixed solvent was measured by a surfactant-selective electrode which consists of polymeric materials only and thus shows a good electrode performance even in mixed solvent. It was found that both intrinsic binding and the cooperative effect were reduced by added ethanol. This is ascribed to replacement of water molecules hydrophobically hydrated around the hydrophobic moieties of the polymer and the surfactant with ethanol molecules. This tendency is correlated with the free energy change of a surfactant molecule when transferred from water to an ethanol-water mixed solvent, which was also measured by the same surfactant electrode as used in the binding study.
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