Thermodynamic investigation of the systems poly(ethylene glycol) plus sodium pentane-1-sulfonate plus water and poly(vinyl pyrrolidone) plus sodium pentane-1-sulfonate plus water

被引:9
作者
Sadeghi, Rahmat [1 ]
Ziaii, Mehdi [1 ]
机构
[1] Univ Kurdistan, Dept Chem, Sanandaj, Iran
关键词
Sodium pentane-1-sulfonate; Poly(ethylene glycol); Poly(vinyl pyrrolidone); Volumetric; Compressibility; Vapor-liquid equilibria; Micellization; AQUEOUS-SOLUTIONS; MICELLE FORMATION; TRANSPORT-PROPERTIES; ADIABATIC COMPRESSIBILITY; DODECYL-SULFATE; SURFACE-TENSION; 1-ALKYL-3-METHYLIMIDAZOLIUM BROMIDE; ISOTHERMAL COMPRESSIBILITY; ISENTROPIC COMPRESSIBILITY; ELECTRICAL CONDUCTANCE;
D O I
10.1016/j.jcis.2010.02.034
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Thermodynamic properties for aqueous solutions containing sodium pentane-1-sulfonate (C(5)SO(3)Na) in the absence and presence of poly(ethyleneglycol) (PEG) or poly(vinylpyrrolidone) (PVP) determined as a function of surfactant concentration from the density, sound velocity, viscosity, conductivity and vapor-liquid equilibria data, are reported here. Densities and sound velocities, allowing for the determination of apparent molar volumes and compressibilities, were measured at 288 15-313 15 K Changes in the apparent molar properties upon micellization were derived using a pseudo-phase-transition approach and the infinite dilution apparent molar volumes and compressibilities of the monomer and micellar state of C(5)SO(3)Na in the investigated solutions were determined The values of the infinite dilution apparent molar properties of micellar states of C(5)SO(3)Na in aqueous polymer solutions are larger than those in pure water Vapor-liquid equilibrium data such as water activity, vapor pressure, osmotic coefficient, activity coefficient and Gibbs free energies were obtained through isoprestic method at 298 15 K The variations of the critical micelle concentration (CMC) of C(5)SO(3)Na in water and in aqueous PEG and PVP solutions with temperature were obtained and a comparison between the CMC of C(5)SO(3)Na obtained from different thermodynamic properties was also made (C) 2010 Elsevier Inc All rights reserved.
引用
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页码:107 / 117
页数:11
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