Simple and complex disorder in binary mixtures with benzene as a common solvent

2015 ◽  
Vol 17 (15) ◽  
pp. 9885-9898 ◽  
Author(s):  
Martina Požar ◽  
Jean-Baptiste Seguier ◽  
Jonas Guerche ◽  
Redha Mazighi ◽  
Larisa Zoranić ◽  
...  
Keyword(s):  
Binary Mixtures ◽  
Computer Simulations ◽  
Aqueous Mixtures ◽  
Complex Disorder

Substituting benzene for water in computer simulations of binary mixtures, allows one to study the various forms of disorder, without the complications often encountered in aqueous mixtures.

Field-induced anti-nematic and biaxial ordering in binary mixtures of discotic mesogens and spherical magnetic nanoparticles

Soft Matter ◽  
2020 ◽  
Vol 16 (47) ◽  
pp. 10667-10675
Author(s):  
Stavros D. Peroukidis ◽  
Sabine H. L. Klapp ◽  
Alexandros G. Vanakaras
Keyword(s):  
Magnetic Nanoparticles ◽  
Binary Mixtures ◽  
Computer Simulations ◽  
Liquid Crystalline ◽  
Magnetic Particles ◽  
Equilibrium Structure ◽  
Discotic Mesogens ◽  
External Stimuli

Using computer simulations we explore the equilibrium structure and response to external stimuli of complex magnetic hybrids consisting of magnetic particles in discotic liquid crystalline matrices.

Lifshitz phase: the microscopic structure of aqueous and ethanol mixtures of 1,n-diols

2017 ◽  
Vol 19 (23) ◽  
pp. 14992-15004 ◽  
Author(s):  
Martina Požar ◽  
Aurélien Perera
Keyword(s):  
Ethylene Glycol ◽  
Binary Mixtures ◽  
Computer Simulations ◽  
Microscopic Structure

We study binary mixtures of ethylene glycol and 1,3-propandiol with water or ethanol using computer simulations.

scholarly journals Micro-heterogeneity versus clustering in binary mixtures of ethanol with water or alkanes

2016 ◽  
Vol 18 (34) ◽  
pp. 23971-23979 ◽  
Author(s):  
Martina Požar ◽  
Bernarda Lovrinčević ◽  
Larisa Zoranić ◽  
Tomislav Primorać ◽  
Franjo Sokolić ◽  
...  
Keyword(s):  
Binary Mixtures ◽  
Complex Disorder ◽  
The Difference

Snapshots of the difference in complex disorder, with analogy with direct (ethanol–water) and inverse (ethanol–alkanes) emulsions.

scholarly journals Comparison of various column packing materials efficiency for hydrocarbons and aqueous mixtures

2019 ◽  
Vol 33 (2) ◽  
pp. 183-190
Author(s):  
Jiří Zbytovský ◽  
Tomáš Sommer ◽  
Martin Zapletal ◽  
Jiří Trejbal
Keyword(s):  
Acetic Acid ◽  
Aqueous Solutions ◽  
Binary Mixtures ◽  
Separation Efficiency ◽  
Reflux Ratio ◽  
Aqueous Mixtures ◽  
Distillation Columns ◽  
Future Design ◽  
Relative Separation ◽  
Column Packings

The efficiency of industrial column packings is commonly tested by standard hydrocarbon mixtures. However, a reduced efficiency value is often observed, particularly during distillation of aqueous mixtures. In this paper, distillation experiments with various binary mixtures were carried out on different column packings to evaluate relative separation efficiencies of mixtures for each packing material. Each of the binary mixtures, which comprised heptane–methylcyclohexane, ethanol–water, morpholine–water, and acetic acid–water, was distilled under atmospheric pressure and total reflux ratio on column packings that were made of PTFE, ceramic, zirconium metal, and inox steel 316. According to the results, aqueous solutions of morpholine and acetic acid generally exhibited low relative separation efficiency (in comparison with standard mixture of heptane–methylcyclohexane), ranging between 40 % and 80 %. The highest relative efficiencies were observed with packings made of steel and ceramic. These observations will be useful for the future design of distillation columns, especially for aqueous solutions.

scholarly journals Surface tension of aqueous binary mixtures under the supercooled conditions – Development of the measuring technique and preliminary data for water + lower alcohols

2018 ◽  
Vol 180 ◽  
pp. 02118 ◽  
Author(s):  
Václav Vinš ◽  
Jiří Hykl ◽  
Zbyněk Nikl ◽  
Miroslav Čenský ◽  
Jan Hrubý
Keyword(s):  
Surface Tension ◽  
Binary Mixtures ◽  
Capillary Tube ◽  
Pure Water ◽  
Capillary Rise ◽  
Solute Concentration ◽  
Liquid Column ◽  
Measuring Technique ◽  
Aqueous Mixtures ◽  
Experimental Apparatus

An experimental apparatus originally developed for the measurement of surface tension of supercooled water was modified such that it allows for measurement of binary aqueous mixtures. The measuring principle based on the capillary rise technique is similar to that employed in the previous measurements with pure water [J. Hrubý et al., J. Phys. Chem. Lett. 5 (2014) 425 and V. Vinš et al., J. Phys. Chem. B 119 (2015) 5567]. The temperature dependence of the surface tension is determined from the measured height of the liquid column elevated in a vertical capillary tube with an inner diameter of 0.32 mm. The aqueous liquid rises to a height of 60 mm to 95 mm depending on the solute concentration and the temperature. Preliminary tests performed with the binary mixtures of water with methanol, ethanol, and n-propanol at various concentrations and temperatures down to –28 °C approved functionality of the measuring technique. Some difficulties, such as influence of impurities on the liquid column elevation or formation of bubbles in the liquid column, were observed. The experimental apparatus is further being modified in order to obtain more accurate data for various aqueous mixtures.

scholarly journals Thermodynamic Characteristics of Phenacetin in Solid State and Saturated Solutions in Several Neat and Binary Solvents

Molecules ◽  
2021 ◽  
Vol 26 (13) ◽  
pp. 4078
Author(s):  
Maciej Przybyłek ◽  
Anna Kowalska ◽  
Natalia Tymorek ◽  
Tomasz Dziaman ◽  
Piotr Cysewski
Keyword(s):  
Heat Capacity ◽  
Solid State ◽  
Binary Mixtures ◽  
Thermodynamic Characteristics ◽  
Precise Determination ◽  
Binary Solvents ◽  
Binary Solvent ◽  
Aqueous Mixtures ◽  
Scanning Calorimetry ◽  
Aqueous Binary Mixtures

The thermodynamic properties of phenacetin in solid state and in saturated conditions in neat and binary solvents were characterized based on differential scanning calorimetry and spectroscopic solubility measurements. The temperature-related heat capacity values measured for both the solid and melt states were provided and used for precise determination of the values for ideal solubility, fusion thermodynamic functions, and activity coefficients in the studied solutions. Factors affecting the accuracy of these values were discussed in terms of various models of specific heat capacity difference for phenacetin in crystal and super-cooled liquid states. It was concluded that different properties have varying sensitivity in relation to the accuracy of heat capacity values. The values of temperature-related excess solubility in aqueous binary mixtures were interpreted using the Jouyban–Acree solubility equation for aqueous binary mixtures of methanol, DMSO, DMF, 1,4-dioxane, and acetonitrile. All binary solvent systems studied exhibited strong positive non-ideal deviations from an algebraic rule of mixing. Additionally, an interesting co-solvency phenomenon was observed with phenacetin solubility in aqueous mixtures with acetonitrile or 1,4-dioxane. The remaining three solvents acted as strong co-solvents.

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