Studies on Physico chemical Properties and Wetting Behavior of Protic Ionic Liquid Solutions

Abstract

VII newlineIntroduction newlineThe compounds that are composed of ions having melting point below 1000C newlineare termed as ionic liquids. (Welton et al., 1999; Sirengo et al. 2023; Boamah et al. newline2023). Unlike electrolytes which requires a solvent for dissociation, ionic liquids are newlineself-dissociated (Singh et al., 2015; Sirengo et al. 2023; Boamah et al. 2023; Giernoth newline2010). Ionic liquid has gain importance because of its unique chemical and physical newlineproperties. Compare to mineral acids and base, ionic liquid possesses low vapour newlinepressure, non-flammable, non-volatile at ambient conditions, less corrosive and show newlineexcellent lubrication as well as hydraulic properties (Welton et al., 1999). Due to these newlineproperties ILs have been used alternative solvents to harsh volatile organic solvents newline(Singh et al., 2015; Boamah et al. 2023). Thus, they have been considered as green newlinesolvent. Broadly ILs can be characterized as aprotic IL and protic ILs, the later having newlinelabile proton (Singh et al., 2015; Boamah et al. 2023). The typical neutralization newlinereaction between Bronsted acid and Bronsted base can form the PIL with melting point newlinebelow 100 oC. The interactions among the components and steric factors may newlinecontribute in lowering the melting point of resultant PILs. As compared to AILs, PILs newlinehave better thermal stability and low volatility and thus are recently being explored newlinefor industrial applications such as electrolyte in electrochemical devices, super newlinecapacitor or batteries. Besides electrochemical applications, the possible multiple newlineinteractions, chemical activity and ease of synthesis, PILs are being used as solvent, newlinecatalyst as well as component for drug delivery systems (Greaves, and Drummond 2008; newlineShang et al., 2017; Greaves, and Drummond 2015). newlineThe application of PILs require precise determination of thermodynamic or newlinephysicochemical properties. Generally, the PIL are being used along with water as a newlinesolvent to overcome the issues related to high viscosity. The problems related to drug newlinesolubility or extraction have also been addressed by re