Journal
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
Volume 41, Issue 4, Pages 547-556Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/01932691.2019.1593859
Keywords
Micellization; electrical conductance; surface tension; UV spectroscopy; fluorescence spectroscopy
Categories
Funding
- (CSIR), Government of India [21(1005)/15/EMR-II]
- (UGC), India [2121010033]
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Two surface active ionic liquids (ILs) having 1-alkyl-3-methylimidazolium cationic moiety and dodecylbenzenesulfonate based anionic moiety i.e. [C(5)mim][DBS] and [C(7)mim][DBS], have been synthesized. H-1-NMR, thin layer chromatography were done for their characterization. These DBS-ILs have lower critical micelle concentration (CMC) in comparison with their conventional sodium dodecylbenzenesulfonate [Na][DBS] surfactants and hence are highly surface active. The conductance, surface tension, absorption (UV-visible) and emission (Fluorescence) techniques were used to determine the CMC values. DBS-ILs showed a remarkable absorption and emission spectra where intensity changes with variation in concentration of IL. Micelle self-assembly formation was also predicted by dynamic light scattering (DLS) technique. Conductance and surface tension techniques were employed to study the aggregation behavior in aqueous conditions. Various surface active parameters were evaluated at 298.15 K employing surface tension techniques. Conductance measurements were performed at three rising temperatures (288.15, 298.15, and 308.15) K and their thermodynamic parameters were calculated. From the above studies, the present synthesized ionic liquids found to have remarkable surface activity. [GRAPHICS] .
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