Clouding behavior of nonionic–cationic and nonionic–anionic mixed surfactant systems in presence of carboxylic acids and their sodium salts |
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Authors: | Musarat Jan Aijaz Ahmad Dar Adil Amin Nuzhat Rehman Ghulam Mohammad Rather |
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Institution: | (1) Department of Chemistry, University of Kashmir, Hazratbal, Srinagar, 19006, J&K, India |
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Abstract: | The study is focused on evaluation of clouding phenomena of the aqueous single nonionic surfactant system Triton X-100 (TX-100)
and its mixed systems with anionic aerosol-OT (AOT) and cationic dodecylpyridinium chloride (DPC) in presence of hydrophobic
ions furnished by sodium salts of carboxylic acids, viz., sodium ethanoate, sodium propanoate, sodium butanoate, and sodium
hexanoate and the respective carboxylic acids ethanoic acid, propanoic acid, butanoic acid, and hexanoic acid]. The influence
of salts on the cloud point (CP) has been explained on the basis of salt effect as well as the solubilization of higher alkyl
chain hydrophobic ions furnished by these salts. Moreover, the co- and counterion effect has been taken into account to explain
the variation of the CP in the mixed systems. However, the effect of acids on CP has been explained in the light of their
aqueous solubility and their partitioning ability between octanol and water as reflected by their K
OW values. |
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Keywords: | Cloud point Hydrophobic co-ions Counterions Salt effect Solubilization |
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