Abstract
In this present work, we report the conductance, FTIR as well as 1H NMR analysis for well known synthetic antioxidant; butylated hydroxyanisole (BHA) and anionic surfactant; sodium dodecyl sulfate (SDS). From the cmc and Xcmc values as a function of temperature, various thermodynamic parameters have been evaluated viz: (a) the standard enthalpy change (ΔH°m), (b) standard entropy change (ΔS°m), and (c) standard Gibbs energy change (ΔG°m). Utilizing the spectroscopic analysis, chemical shift/frequency was accounted in different conditions indicative of SDS molecule binding to BHA. Furthermore, the acoustic properties in three different compositions of ethanol containing water i.e. 100% (pure ethanol), 70% v/v (ethanol rich), and 30% v/v (water rich) solutions were also determined at three temperatures at an interval of 5°C (25°C, 30°C, and 35°C). Specifically, the density (ρ), ultrasonic velocity (u) and viscosity (η) as function of SDS containing BHA have been determined and the resulting data was used to estimate various acoustical parameters; the compressibility coefficient (β), apparent molar volumes (ϕv) and apparent molar compressibility (ϕk). These calculated parameters were found to be sensitive toward the interactions prevailing in BHA–SDS-solvent system and interactions in different water–ethanol compositions. Convincingly existence of a good qualitative correlation is observed with regard to SDS–BHA interactions obtained from the measurements.
Published Version
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