International Journal For Multidisciplinary Research

E-ISSN: 2582-2160   •   Impact Factor: 9.24

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Investigation of the molecular interaction between n-alcohols and dimethyl ethanol ammonium bromide surfactant in aqueous micelle solutions through ultrasonic analysis

Author(s) Mr. Kiran Dhananjay Patil, Dr. Gunvant Hari Sonawane, Dr. Mahendra Sahebrao Borse
Country India
Abstract Ultrasonic and physicochemical investigations were employed to elucidate molecular interactions in aqueous mixed micellar systems of the cationic surfactant dodecyl dimethyl ethanol ammonium bromide (C12DMEAB) and n-alcohols (C4–OH to C7–OH). Measurements of ultrasonic velocity, density, viscosity, and conductivity were performed for varying alcohol concentrations (10–50 mM) in 100 mM C12DMEAB over the temperature range 298.15–313.15 K. Derived acoustical parameters adiabatic compressibility (βad), intermolecular free length (Lf), and acoustic impedance (Z) exhibited systematic variations with alcohol chain length, concentration, and temperature. The decrease in compressibility and free length, together with increased acoustic impedance, indicates enhanced solute–solvent interactions and micelle growth. Complementary viscosity (ɳ), oil solubilization (μl), viscous relaxation time (τ) and conductance (Κ) results confirm alcohol incorporation into the micellar structure, demonstrating the role of n-alcohols as effective cosurfactants stabilizing C12DMEAB micelles.
Keywords Alcohol, Cationic surfactant, Ultrasonic velocity, Acoustic parameter, Oil solubilization, Viscosity.
Field Chemistry
Published In Volume 8, Issue 1, January-February 2026
Published On 2026-01-20
DOI https://doi.org/10.36948/ijfmr.2026.v08i01.66968
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E-ISSN 2582-2160
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