Initial Interfacial Tension for Various Organic–Water Systems and Study of the Effect of Solute Concentration and Temperature

Abstract

Interfacial tension is an important thermophysical property for the operations involving multi fluid-phases such as liquid-liquid extraction. This work aims at presenting a rapid experimental method and initial interfacial tension data of 10 organic compounds and water binary systems. The organic compounds include n-butyl acetate, cyclohexanol, cyclohexanone, diethyl ether, ethyl acetate, methyl ethyl ketone, methylcyclohexane, 1-octanol, and toluene. The effect of temperature on the initial interfacial tension has also been studied. These systems are chosen to cover a wide range of interfacial tension (1-51 mN/m). Comparisons between the data sets from this work and those from the literature, whenever available, show generally very good agreement. This work also presents new data of initial interfacial tension for several ternary systems with 4 organic compounds and water with varying quantities of propionic acid (0 to 0.25 mass fraction) at ambient conditions; the organic compounds include n-butyl acetate, cyclohexanone, 1-octanol, and toluene. The results show that the impact of propionic acid concentration as solute in water is large, especially at the higher solute concentrations. The initial and final (mutually saturated phases) interfacial tensions are found in agreement for different immiscible binary systems studied in this work. The method presented may be used as a rapid way of finding interfacial tensions.

Qualification of Non-Halogenated Organic Solvents Applied to Microsphere Manufacturing Process

“…The EA−water interfacial tension was measured to be 6.44 ± 0.04 mN/m ( Figure 6). This value was quite similar to those values of 6.80 and 7.25 mN/m reported elsewhere [19][20][21]. The EF−water interfacial tension was determined to be 7.26 ± 0.14 mN/m.…”

Aerosol Optical Tweezers Constrain the Morphology Evolution of Liquid-Liquid Phase-Separated Atmospheric Particles

“…We compiled literature data 85,86 for the interfacial tension between pure organic compounds and water and used it to relate interfacial tensions to O:C, a readily measured indicator of the degree of organic carbon oxidation state. 63,85,86 Organic carbon is transformed from a less to a more highly oxidized state through atmospheric chemistry largely driven by free radicals such as the hydroxyl radical, as well as ozone and other reactive oxidants. This chemistry functionalizes the carbon backbone through the addition of polar functional groups, and fragmentation of carbon-carbon bonds through free radical oxidation is also possible.…”

“…We show organic acid trends (in s a|b ) as they are common in ambient OA systems. They are contrasted with organic esters, which were the organic group that had the highest interfacial tension for a given O:C in the compiled dataset 85,86. For larger values of O:C, a homogeneous morphology is expected (s a|b < 0 is unphysical; as no liquid-liquid phase separation exists here).…”

The formation principle of micro-droplets induced by using optical tweezers

“…As an aqueous buffer, PBS is often used to maintain pH value for biological samples because of its certain stability in chemical reactions 16 . Since IPA can increase the chemical affinity between the separated phases and does not chemically react with PBS basically, the mixed solution will not be stratified like the oil-water solution under the normal circumstance 17,18 .…”