Turbidity of a near-critical ionic fluid

Journal Article · Tue Nov 01 04:00:00 EST 1994 · International Journal of Thermophysics

DOI:https://doi.org/10.1007/BF01458813· OSTI ID:50767

Narayanan, T; Pitzer, K S ^[1]

---

1. Lawrence Berkeley Lab., CA (United States)

We report the critical behavior of osmotic compressibility ({chi}{sub T}), that was deduced from turbidity, in an ionic fluid mixture comprised of tetra-n-butyl-ammonium picrate in a low dielectric solvent, 1-dodecanol. The liquid-liquid phase separation in this system is driven, predominantly, by Coulombic interactions. Measurements covered the reduced temperature, t, range 7 {times} 10{sup -5} {<=} t {<=} 7 {times} 10{sup -2}. The critical behavior of {chi}{sub T} indicates a crossover from the mean-field to the Ising critical exponent, as the critical temperature (T{sub c}) is approached.

• Sponsoring Organization: USDOE
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 50767
• Report Number(s): CONF-940633--
• Journal Information: International Journal of Thermophysics, Journal Name: International Journal of Thermophysics Journal Issue: 6 Vol. 15; ISSN IJTHDY; ISSN 0195-928X
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
66 PHYSICS
ALCOHOLS
COMPRESSIBILITY
CRITICAL TEMPERATURE
EXPERIMENTAL DATA
FLUIDS
MIXTURES
SOLVENTS
TURBIDITY