TY - JOUR
T1 - Dynamic surface tension of hydrocarbon and fluorocarbon surfactant solutions using the maximum bubble pressure method
AU - Hirt, Douglas E.
AU - Prud'Homme, Robert K.
AU - Miller, Bernard
AU - Rebenfeld, Ludwig
N1 - Funding Information:
The work presented here is part of an ongoing study on the interaction of fluids with fibrous materials, funded by a group of TRI Corporate participants. Financial support is also acknowledged from the NSF through the PYI award to RKP. The authors gratefully acknowledge the invaluable suggestions offered by Dr Ted Miller Jr of Dow Chemical and Dr James Wingrave of du Pont. In addition, the help of MS Lee Campbell of Union Carbide, and of Drs Yas-havanth Kamath and Hans-Dietrich Weigmann of TRI is greatly appreciated.
Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 1990
Y1 - 1990
N2 - Industrial processes frequently use surfactants to lower liquid surface tension and promote wetting. In many instances, it is incorrect to apply the equilibrium (static) surface tension to predict the behavior of these processes because they operate under time-dependent (dynamic) conditions. This paper describes the measurement of dynamic surface tension, that is, the surface tension under dynamic conditions where the limitation of surfactant diffusion to the growing interface results in tensions above the equilibrium surface tension. Experimental results, obtained using the maximum bubble pressure method, are presented for aqueous solutions of hydrocarbon and fluorocarbon surfactant systems and for dilute polymer solutions. In particular, the experiments have shown the combined effects of the rate of generation of a gas/liquid interface and the surfactant concentration on the surface tension. Noteworthy are results for fluorocarbon surfactant solutions which can exhibit dynamic surface tension behavior at exceedingly small rates of surface dilation. Synergistic effects of surfactant mixtures and the effect of temperature on dynamic surface tension are presented, as well as the effects of foaming and liquid viscosity on the measurement technique.
AB - Industrial processes frequently use surfactants to lower liquid surface tension and promote wetting. In many instances, it is incorrect to apply the equilibrium (static) surface tension to predict the behavior of these processes because they operate under time-dependent (dynamic) conditions. This paper describes the measurement of dynamic surface tension, that is, the surface tension under dynamic conditions where the limitation of surfactant diffusion to the growing interface results in tensions above the equilibrium surface tension. Experimental results, obtained using the maximum bubble pressure method, are presented for aqueous solutions of hydrocarbon and fluorocarbon surfactant systems and for dilute polymer solutions. In particular, the experiments have shown the combined effects of the rate of generation of a gas/liquid interface and the surfactant concentration on the surface tension. Noteworthy are results for fluorocarbon surfactant solutions which can exhibit dynamic surface tension behavior at exceedingly small rates of surface dilation. Synergistic effects of surfactant mixtures and the effect of temperature on dynamic surface tension are presented, as well as the effects of foaming and liquid viscosity on the measurement technique.
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U2 - 10.1016/0166-6622(90)80191-6
DO - 10.1016/0166-6622(90)80191-6
M3 - Article
AN - SCOPUS:0025398838
VL - 44
SP - 101
EP - 117
JO - Colloids and Surfaces
JF - Colloids and Surfaces
SN - 0166-6622
IS - C
ER -