Research output: Contribution to journal › Article › peer-review
Effect of Temperature on the Dynamic Properties of Mixed Surfactant Adsorbed Layers at the Water/Hexane Interface under Low-Gravity Conditions. / Kovalchuk, Volodymir; Loglio, Giuseppe; Быков, Алексей Геннадьевич; Ferrari, Michele; Kraegel, Juergen; Liggieri, Libero; Miller, Reinhard; Миляева, Ольга Юрьевна; Носков, Борис Анатольевич; Ravera, Franceska; Santini, Eva; Schneck, Emmanuel.
In: Colloids and Interfaces, Vol. 4, No. 3, 27, 09.2020.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Effect of Temperature on the Dynamic Properties of Mixed Surfactant Adsorbed Layers at the Water/Hexane Interface under Low-Gravity Conditions
AU - Kovalchuk, Volodymir
AU - Loglio, Giuseppe
AU - Быков, Алексей Геннадьевич
AU - Ferrari, Michele
AU - Kraegel, Juergen
AU - Liggieri, Libero
AU - Miller, Reinhard
AU - Миляева, Ольга Юрьевна
AU - Носков, Борис Анатольевич
AU - Ravera, Franceska
AU - Santini, Eva
AU - Schneck, Emmanuel
PY - 2020/9
Y1 - 2020/9
N2 - An increase in temperature typically leads to a decrease in the interfacial tension of a water/oil interface. The addition of surfactants to the system can complicate the situation significantly, i.e., the interfacial tension can increase or decrease with an increasing temperature. For most concentrations of the two studied surfactants, the cationic tetradecyl trimethyl ammonium bromide (TTAB) and the nonionic tridecyl dimethyl phosphine oxide (C13DMPO), the measured interfacial tension of the aqueous mixed surfactant solutions against hexane increases when the temperature decreases between 30 degrees C and 20 degrees C. However, with a further temperature decrease between 20 degrees C and 15 degrees C, the reverse effect has also been observed at some concentrations, i.e., a decrease of interfacial tension. Additionally, the corresponding dilational interfacial visco-elasticity shows some discrepant temperature effects, depending on the bulk concentration and oscillation frequency. The experiments have been performed with a capillary pressure tensiometer under the conditions of micro-gravity. The reason for the positive and negative interfacial tension and visco-elasticity gradients, respectively, within certain ranges of the temperature, concentration and mixing ratios, are discussed on the basis of all available parameters, such as the solubility and partitioning of the surfactants in the two liquid phases and the oscillation frequency.
AB - An increase in temperature typically leads to a decrease in the interfacial tension of a water/oil interface. The addition of surfactants to the system can complicate the situation significantly, i.e., the interfacial tension can increase or decrease with an increasing temperature. For most concentrations of the two studied surfactants, the cationic tetradecyl trimethyl ammonium bromide (TTAB) and the nonionic tridecyl dimethyl phosphine oxide (C13DMPO), the measured interfacial tension of the aqueous mixed surfactant solutions against hexane increases when the temperature decreases between 30 degrees C and 20 degrees C. However, with a further temperature decrease between 20 degrees C and 15 degrees C, the reverse effect has also been observed at some concentrations, i.e., a decrease of interfacial tension. Additionally, the corresponding dilational interfacial visco-elasticity shows some discrepant temperature effects, depending on the bulk concentration and oscillation frequency. The experiments have been performed with a capillary pressure tensiometer under the conditions of micro-gravity. The reason for the positive and negative interfacial tension and visco-elasticity gradients, respectively, within certain ranges of the temperature, concentration and mixing ratios, are discussed on the basis of all available parameters, such as the solubility and partitioning of the surfactants in the two liquid phases and the oscillation frequency.
KW - дилатационная реология, алкилфосфиноксиды
KW - interfacial dilational viscoelasticity
KW - mixed surfactant adsorption layer
KW - water
KW - hexane interface
KW - drop oscillations
KW - capillary pressure tensiometry
KW - effect of temperature
KW - microgravity
KW - NONMONOTONIC DEPENDENCE
KW - ALKYLPHOSPHINE OXIDES
KW - DILATIONAL RHEOLOGY
KW - ADSORPTION-KINETICS
KW - TENSION
KW - MINIMUM
KW - OIL
KW - ELASTICITY
KW - FILM
UR - https://www.mendeley.com/catalogue/25e63918-8520-3871-9f73-7cdaa66ef484/
U2 - 10.3390/colloids4030027
DO - 10.3390/colloids4030027
M3 - Article
VL - 4
JO - Colloids and Interfaces
JF - Colloids and Interfaces
SN - 2504-5377
IS - 3
M1 - 27
ER -
ID: 70760685