Microcalorimetric determination of effect of the antioxidant (Quercetin) on polymer/surfactant interactions

Isothermal titration calorimetry (ITC) and batch calorimetry techniques have been used to evaluate the effect of added antioxidant (Quercetin, QN) on the binding between a polymer/surfactant complex, namely the sodium salt of polystyrene sulfonate (PSS) and typical anionic surfactant sodium dodecyls...

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Veröffentlicht in:Journal of thermal analysis and calorimetry 2010-11, Vol.102 (2), p.729-737
Hauptverfasser: Singh, Kulbir, Marangoni, D. Gerrard
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Marangoni, D. Gerrard
description Isothermal titration calorimetry (ITC) and batch calorimetry techniques have been used to evaluate the effect of added antioxidant (Quercetin, QN) on the binding between a polymer/surfactant complex, namely the sodium salt of polystyrene sulfonate (PSS) and typical anionic surfactant sodium dodecylsulfate (SDS). An indirect isotherm approximation method and the Satake–Yang model have been used to evaluate the binding parameter ( Ku ), adsorption cooperativity ( u ), and the Gibbs free energy of cooperative and non-cooperative binding (Δ G C and Δ G N ) from the ITC data. The enthalpy of dissolution of QN into various PSS/water and PSS/SDS/water solutions has been evaluated from batch calorimetry to study the energetics of the polymer/surfactant binding in the presence of QN.
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1572-8943
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subjects Adsorption
Analysis
Analytical Chemistry
Antioxidants
Applied sciences
Binding energy
Calorimetry
Chemistry
Chemistry and Materials Science
Dissolution
Exact sciences and technology
Inorganic Chemistry
Mathematical models
Measurement Science and Instrumentation
Organic polymers
Physical Chemistry
Physicochemistry of polymers
Polymer Sciences
Properties and characterization
Sodium
Sulfonates
Surface active agents
Surfactants
Thermal and thermodynamic properties
title Microcalorimetric determination of effect of the antioxidant (Quercetin) on polymer/surfactant interactions
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