A Study on Surfactant Adsorption Kinetics: The Role of the Data of Equation of State γ(Γ) for C14E8

New methodology to determine the rate-limiting adsorption kinetics mechanism from experimental dynamic surface tension data

“…Note that in Table 2, the uncertainties in the regressed D values are between 0.6 × 10 −6 and 1.6 × 10 −6 cm 2 /s. Considering that an accuracy in the diffusion coefficient to within ±1 × 10 −6 cm 2 /s has been sufficient to predict the adsorption kinetics behavior of nonionic surfactants [37,38,41,83,84], it follows that the new methodology is able to determine the best-fit D values within an acceptable degree of accuracy. Note that the diffusion coefficient of C 12 E 8 reported in Table 2 (about 4.3 × 10 −6 cm 2 /s) is consistent with the value of about 5 × 10 −6 cm 2 /s at 306 K reported in Ref.…”

“…Specifically, the Langmuir model results in a D value of 21 × 10 −6 cm 2 /s, the Frumkin model results in a D value of 11 × 10 −6 cm 2 /s, and the Generalized Frumkin model results in a D value of 8.0 × 10 −6 cm 2 /s. In view of the observed high sensitivity of the regressed values of the kinetics parameters to the chosen equilibrium adsorption isotherm model, Lin et al [41] and Pan et al [35] proposed carrying out surface expansion measurements, in addition to performing equilibrium surface tension measurements, to further validate the equilibrium adsorption isotherm model chosen to analyze the experimental DST data. These authors concluded that surface expansion measurements can be useful in testing various equilibrium adsorption isotherm models, and hence, in obtaining more reliable estimates of the kinetics parameters, D and β.…”

“…The existing procedure used to determine the rate-limiting adsorption kinetics mechanism (diffusion-controlled vs mixedcontrolled), as well as to determine the values of the kinetics parameters, D and β, involves the following three steps [35,[37][38][39][40][41][42][43][44][45][46]:…”

The effect of alkane tail length of C E8 surfactants on transport to the silicone oil–water interface

“…Silicone oil is used in microfluidic studies and is available in different viscosities. This series of surfactants has been extensively studied at the air-water interface [8][9][10][11][12]. We anticipate that the parameters obtained from this study will be of use to those modeling surfactant mediated events in applications such as microfluidics, emulsification and de-emulsification processes.…”

“…Even though dynamic surface tension studies have been conducted at the oil-water interface [4][5][6][7][8][9][10][11][12][13][14][15], the number of possible oil-water/surfactant combinations is immense. Therefore, researchers interested in surfactant induced phenomena, e.g.…”