Interfacial tension and critical wetting phenomena of the binary liquid mixture cyclohexane-acetonitrile near the critical solution temperature

1987 ◽  
Vol 16 (8) ◽  
pp. 691-697 ◽  
Author(s):  
S. Guha ◽  
V. C. Vani ◽  
Y. Jayalaxmi ◽  
A. Kumar ◽  
B. Ravi Gopal ◽  
...  
Keyword(s):  
Interfacial Tension ◽  
Liquid Mixture ◽  
Binary Liquid Mixture ◽  
Solution Temperature ◽  
Critical Solution Temperature ◽  
Binary Liquid ◽  
Critical Wetting ◽  
Wetting Phenomena

LIGHT SCATTERING OF A CRITICAL BINARY LIQUID MIXTURE: TRIETHYLAMINE–WATER

1965 ◽  
Vol 43 (6) ◽  
pp. 1803-1811 ◽  
Author(s):  
B. Chu ◽  
W. P. Kao
Keyword(s):  
Light Scattering ◽  
Liquid Mixture ◽  
Coexistence Curve ◽  
Chem Phys ◽  
Binary Liquid Mixture ◽  
Scattering Data ◽  
Solution Temperature ◽  
Interaction Range ◽  
Binary Liquid ◽  
Critical Opalescence

The coexistence curve and critical opalescence of a binary liquid mixture, triethylamine–water, have been reinvestigated. The measurements showed that the coexistence curve appears to follow a cubic relation to within about 0.003° of the critical solution temperature, and in this range, there is no evidence of a flat region. Furthermore, within the range of the values of s/λ(where s = 2 sin (θ/2), λ = wavelength in the medium, and s/λ varied from 1.2 × 10−4 to 7.0 × 10−4 Å−1) and temperatures studied, the light scattering data are in good agreement with the Debye theory (J. Chem. Phys. 31, 680 (1959)). The molecular interaction range of Debye was found to be 5.1 ± 0.3 Å.

scholarly journals Temperature-Induced Liquid Crystal Microdroplet Formation in a Partially Miscible Liquid Mixture

2019 ◽  
Author(s):  
Mehzabin Patel ◽  
Anand N. Pallipurath Radhakrishnan ◽  
Ludovic Bescher ◽  
Elwin Hunter-Sellars ◽  
Benjamin Schmidt-Hansberg ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Liquid Mixture ◽  
Liquid Mixtures ◽  
Solution Temperature ◽  
Material System ◽  
Reversible Process ◽  
Critical Solution Temperature ◽  
Binary Liquid ◽  
Partially Miscible ◽  
Extraction Processes

The controlled formation of microdroplets through temperature variation is an intriguing concept for binary liquid mixtures with a critical solution temperature. Here, we investigate this phenomenon for a blend of methanol (MeOH) and a thermotropic liquid crystal (LC) 4-Cyano-4’-pentylbiphenyl (5CB). A near-room-temperatureinduced phase separation leads to nucleation, growth and coalescence of mesogen-rich droplets. The size and number of the droplets is tunable on the microscopic scale by variation of temperature quench depth and cooling rate. Further cooling induces a phase transition to nematic droplets with radial configuration, well-defined sizes and stability over the course of an hour. This fully reversible process is an interesting material system with relevance in diagnostics, optoelectronics, materials templating and extraction processes.<br>

scholarly journals Temperature-Induced Liquid Crystal Microdroplet Formation in a Partially Miscible Liquid Mixture

2019 ◽  
Author(s):  
Mehzabin Patel ◽  
Anand N. Pallipurath Radhakrishnan ◽  
Ludovic Bescher ◽  
Elwin Hunter-Sellars ◽  
Benjamin Schmidt-Hansberg ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Liquid Mixture ◽  
Liquid Mixtures ◽  
Solution Temperature ◽  
Material System ◽  
Reversible Process ◽  
Critical Solution Temperature ◽  
Binary Liquid ◽  
Partially Miscible ◽  
Extraction Processes

The controlled formation of microdroplets through temperature variation is an intriguing concept for binary liquid mixtures with a critical solution temperature. Here, we investigate this phenomenon for a blend of methanol (MeOH) and a thermotropic liquid crystal (LC) 4-Cyano-4’-pentylbiphenyl (5CB). A near-room-temperatureinduced phase separation leads to nucleation, growth and coalescence of mesogen-rich droplets. The size and number of the droplets is tunable on the microscopic scale by variation of temperature quench depth and cooling rate. Further cooling induces a phase transition to nematic droplets with radial configuration, well-defined sizes and stability over the course of an hour. This fully reversible process is an interesting material system with relevance in diagnostics, optoelectronics, materials templating and extraction processes.<br>

Phase separation of binary mixtures induced by soft centrifugal fields

2021 ◽  
Author(s):  
Thomas Zemb ◽  
Rose Rosenberg ◽  
Stjepan Marčelja ◽  
Dirk Haffke ◽  
Jean-François Dufrêche ◽  
...  
Keyword(s):  
Phase Separation ◽  
Critical Point ◽  
Binary Mixtures ◽  
Liquid Mixture ◽  
Model System ◽  
Binary Liquid Mixture ◽  
Miscibility Gap ◽  
Critical Fluctuations ◽  
Binary Liquid

We use the model system ethanol–dodecane to demonstrate that giant critical fluctuations induced by easily accessible weak centrifugal fields as low as 2000g can be observed above the miscibility gap even far from the critical point of a binary liquid mixture.

Sign in / Sign up

Export Citation Format

Share Document