Temperature dependent micellization behavior of as synthesized anionic SAILs in aqueous nonionic polymer solutions: conductivity, UV-visible probe and antimicrobial studies

As synthesized surface active ionic liquids (SAILs), Tetrapropylammonium Dodecylsulfate (TPADS), and Tetrabutylammonium (TBADS) have been characterized by FTIR, 1H-NMR 13C-NMR spectroscopic techniques. Conductometric UV-Visible probe investigations attempted to study the aggregation behavior of these SAILs in aqueous solution polymers Polyvinylpyrrolidone (PVP) Polyethylene glycol (PEG) at different temperatures concentrations. Two breaking points were identified from κ vs [SAILs] plots. First, critical concentration (CAC) is recognized with polymer-SAILs binding second being regarded as micellar (CMC), suggested represent saturation point for Polymer-SAIL aggregation. Thermodynamic parameters micellization (ΔGmo,ΔHmo ΔSmo) are rationalized terms interactions prevailing between hydrophobic hydrophilic regions SAIL-Polymer system. Micellization process blend SAIL-PVP found be more favored than SAIL-PEG all temperatures. Further, effect PVP on antimicrobial activities TPADS/TBADS has tested measuring zone inhibition which accounts higher effectiveness PVP-SAILs system against gram positive bacteria (Bacillus cereus Staphylococcus aureus) compared negative (Pseudomonas aeruginosa).