6533b861fe1ef96bd12c5780

RESEARCH PRODUCT

Electrostatic contribution to the interaction of α, β poly (N-hydroxyethyl)-DL-aspartamide with sodium dodecylsulfate micelles

Gaetano GiammonaGennara CavallaroG. La MannaV. Turco LiveriGiovanna Pitarresi

subject

Aqueous solutionPulmonary surfactantChemistryPolymer chemistryEnthalpyInorganic chemistryElectrolyteMicelleSodium dodecylsulfate

description

The enthalpic effect due to the interaction between α, β poly(N-hydroxyethyl)-DL-aspartamide (PHEA) and sodium dodecylsulfate (SDS) in aqueous solutions as a function of the surfactant concentration was measured by the calorimetric technique at various NaCl concentrations. A marked influence of the added electrolyte on the PHEA-SDS interaction was observed. An analysis of the experimental enthalpies allows to estimate the electrostatic and the hydrophobic contributions to the enthalpy of interaction between PHEA and SDS micelles. The results were rationalized in terms of effects due to the screening of the charges residing on PHEA and SDS micelles.

yearjournalcountryeditionlanguage
1994-11-01Journal of thermal analysis
https://doi.org/10.1007/bf02547108