Influence of alcohols on the lower consolute behavior and thermodynamic approach of Triton X-114 aqueous two-phase systems

• Published in: Journal of the Indian Chemical Society 2022-08, Vol.99 (8), p.100572, Article 100572
• Main Authors: Nikam, Bhaskar K., Jadhav, Vilas B., Borse, Mahendra S.
• Format: Article
• Language: English
• Subjects: Cloud point; Critical micelle concentration; Nonionic surfactant; Thermodynamic parameters; Triton X-114
• ISSN: 0019-4522
• DOI: 10.1016/j.jics.2022.100572

The addition of foreign material to surfactants shows the change in temperature at which the clouding process occurs. This work evaluates the impact of n-alcohols on Cloud Point (CP) of nonionic surfactant Triton X-114 at variable concentrations. It was found that the CP of pure Triton X-114 shows concentration-dependent variation. The presence of lower alcohols improves CP value whereas the addition of higher alcohols brings down CP with variation as concentration increases. These effects can be clarified in view of the site of the impact of molecular design of added substances on the stability of micelle organization. The foaming ability and foam stability data are also used to discuss the stability of micellar accumulation. Considering CP as a threshold temperature of the solubility, the thermodynamic parameters of the clouding process ΔG0cl, ΔH0cl, and ΔS0cl, have been assessed, using the “Phase Separation Model”. The outcomes of the work demonstrate that the clouding phenomenon of Triton X-114 is an exothermic and non-spontaneous process. [Display omitted] •The lower consolute behavior (CP) is an important property of nonionic surfactant.•CP of Triton X-114 is tuned in presence of n-alcohols.•Short chain alcohols elevates the CP.•Long chain alcohol lowers CP with Variation.•Thermodynamic properties are also affected by temperature change.