Effects of alcohols and temperature on association, micellar parameters, and energetics of mixture of cetylpyridinium bromide and polyvinyl alcohol

Rather, S.-U. and Islam, M.S. and Bamufleh, H.S. and Alhumade, H. and Ahmad Taimoor, A. and Saeed, U. and Adebayo Sulaimon, A. and Anamul Hoque, M. and Alalayah, W.M. and Mohd Shariff, A. (2023) Effects of alcohols and temperature on association, micellar parameters, and energetics of mixture of cetylpyridinium bromide and polyvinyl alcohol. Journal of Molecular Liquids, 380. ISSN 01677322

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The mixture of polymer and surfactant is extensively employed in numerous daily used products such as detergents, perfumes, cleaning agents, foodstuffs, oil recovery procedures, paints, as well as pharmaceutical formulations. Interaction of cetylpyridinium bromide (CPB) with polyvinyl alcohol (PVA) has been investigated in water and aqueous solution of different alcohols using the conductivity technique. The type and strength of interaction between CPB and PVA during assembly process have been assessed from different micellar parameters i.e., critical micelle concentration (CMC), extent of counterion dissociation (α), Gibbs free energy (�Gm0), enthalpy (�Hm0), entropy (�Sm0) of micellization etc. The CMC and α were determined from the specific conductivity vs CPB plots. The micellization of CPB was attained to be augmented in occurrence of PVA. The CMC values of CPB + PVA system were experienced to be increased through the elongation of chain length of carbon as well as increase of concentration of certain alcohol. The sharp increase of CMC values was also observed with the increase of temperature in a certain alcoholic medium. The values of degree of dissociation were undergone to be augmented by the increase of concentration of certain alcohol as well as the elongation of carbon chain length. The negative free energy of micellization (-�Gm0) values reveal that the CPB + PVA system undergoes aggregation spontaneously and spontaneity of micellization experienced a reduction with the elongation of carbon chain length. Values of enthalpy (�Hm0) of micellization were negative i.e., aggregation of CPB + PVA system is an exothermic phenomenon. The �Hmoand�Smo values disclose that the main interaction forces between CPB and PVA are electrostatic, hydrophobic, and ion�dipole interactions. The stability of the micelle formed was assessed from enthalpy-entropy compensation parameters. © 2023 Elsevier B.V.

Item Type: Article
Impact Factor: cited By 1
Uncontrolled Keywords: Aggregates; Association reactions; Carbon; Chain length; Critical micelle concentration; Dissociation; Elongation; Enthalpy; Free energy; Gibbs free energy; Micelles; Micellization; Polyvinyl alcohols, Carbon-chain length; Cetylpyridinium bromides; Cleaning agents; Concentration values; Critical miceller concentrations; Micellar parameters; Physico-chemical approach; Physico-chemicals; Surfactant-polymer interaction; Used product, Entropy
Depositing User: Mr Ahmad Suhairi Mohamed Lazim
Date Deposited: 04 Oct 2023 13:31
Last Modified: 04 Oct 2023 13:31
URI: http://scholars.utp.edu.my/id/eprint/37546

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