Application of 2D polymer film scaling theory to natural sea surface films

Pogorzelski, S.

doi:10.1016/0927-7757(96)03571-6

Cited by 9 publications

(11 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The mean molecular mass M w (= 0.65-9.7 kDa) and limiting specific area (= 2.7-31.6 nm 2 /molecule) of surfactants composing the film point to the polymer-like biomolecules with an apparent structural organization at the air-water interface (Pogorzelski, 2001). The degree of mixing and formation of layered structures of surfactants in a multicomponent natural film can be predicted by means of the 2D polymer scaling theory applied to the isotherms and expressed by the value of the scaling exponent y demonstrated by the interfacial system (Pogorzelski, 1996). Recently, the novel approach proposed for the description of surfactant adsorption kinetics is based on the mixed kinetic-diffusion model (Eastoe et al, 2001).…”

Section: Sea Surface Filmsmentioning

confidence: 99%

“…The characterization of the miscibility or phase separation of the monolayer-forming components can be expressed in terms of the 2D polymer film scaling theory via y-scaling exponent derived from the relation E isoth = yp as shown in (Pogorzelski, 1996). Low values of y (<3.5) stand for a homogeneous mixed film ('good' solvent condition), higher y%8 ('theta' solvent case) lead to less film homogeneity observed as patches or domains of film-forming components.…”

Section: Static Film Properties -Scaling Proceduresmentioning

confidence: 99%

See 1 more Smart Citation

Surface Rheology Parameters of Source-Specific Surfactant Films as Indicators of Organic Matter Dynamics

2006

View full text Add to dashboard Cite

The paper contains the results of natural film experiments carried out on inland and coastal waters in the Dead Vistula catchment area and mouth during 2000-2002, using the integrated Langmuir troughWilhelmy plate system. The static film parameters result from the generalized scaling procedures applied to the surface pressure-area isotherms. They appear to reflect in a quantitative and sensitive way the film composition (A lim , M w , E isoth ), film solubility and the miscibility of its components (via R, DS c and y factors), and surface concentration (p eq , G eq ). The adsorption kinetics parameters: effective diffusion coefficient D eff /D and activation energy barrier E a /RT are derived from dynamic surface pressure. There is a reason to suggest that certain classes of film-forming components or 'end-members' may dominate the static and dynamic surface properties. Variation in the surface rheological parameters of source-specific biosurfactants is postulated to reflect organic matter dynamics in natural waters and were measured for the Dead Vistula river, its tributaries and the adjacent coastal area.

show abstract

Section: Sea Surface Filmsmentioning

confidence: 99%

Section: Static Film Properties -Scaling Proceduresmentioning

confidence: 99%

Surface Rheology Parameters of Source-Specific Surfactant Films as Indicators of Organic Matter Dynamics

2006

View full text Add to dashboard Cite

show abstract

“…2D phase separation of the monolayer-forming components in a heterogeneous film can be considered in the framework of the 2D polymer film-scaling theory (De Gennes 1979 ; Jiang and Chiew 1994 ). The scaling exponent ( y )—can be obtained from the relation E isoth = yπ , by measuring the high-frequency limit of the surface modulus E isoth as a function of the surface pressure (Pogorzelski 1996 ). For low values of y (< 3.5), the interfacial film-water subphase system demonstrates a “good” solvent behavior and one is concerned with a homogeneous monomolecular mixed film.…”

Section: Static Film Structure Parametersmentioning

confidence: 99%

“…Further parameters ∆S c and R result from the integration routine of the compression and expansion isotherm plots. The scaling exponent y is determined from the relation E isoth = yπ from its low surface pressure range (0 < π < 2–3 mN m −1 ) part, as shown in Pogorzelski 1996 . The surface pressure temperature coefficient β s is obtained from a slope of the straight line tangent to the experimental plot computed using a least-squares fitting procedure (values of r 2 were ranging from 0.83 to 0.96; where r is the correlation coefficient), and applied to the particular temperature ranges below and above the cusp points evidenced at each isochore plots (see Fig.…”

Section: Static Film Structure Parametersmentioning

confidence: 99%

Evolution of natural sea surface films: a new quantification formalism based on multidimensional space vector

Boniewicz-Szmyt

Pogorzelski

2017

Environ Sci Pollut Res

View full text Add to dashboard Cite

Spatial and temporal variability of natural surfactant sea surface film structural parameters were evaluated from force-area isotherms, film pressure-temperature isochors, dynamic surface tension-time relations performed on samples collected in Baltic Sea shallow coastal waters. The film structure state was postulated as a 10-D dimensionless vector created from the normalized thermodynamic, adsorptive, and viscoelastic film parameters. The normalization procedure is based on the concept of self-corresponding states known in thermodynamics. The values taken by all the reduced parameters indicated a significant deviation from the reference ideal-2D gas behavior. The exhibited deviations of the surface parameters from the background values of the same thermodynamic state of each film were independent on the film-collecting procedure, sample solvent treatment, and temperature. The structural similarity was expressed quantitatively as a (Cartesian, street, and Czebyszew) distance between two vectors of the analyzed film and the standard one from the database, and appeared to be related to environmental conditions, surface-active organic matter production, and migration in the studied coastal sea region. The most distinctive parameters differing the films were y, M w and E isoth, as established from Czebyszew function application. The proposed formalism is of universal concern and could be applied to any natural water surfactant system (seawater, inland water, rain water, and snowmelt water).

show abstract

“…The miscibility and self-organization of film-composing surfactants within the interfacial structure can be foreseen by adopting the 2D polymer film scaling approach. The scaling exponent y can be obtained from the dependence E isoth = yπ , under the high-frequency film compression condition, where the film material is assumed to be effectively insoluble (Pogorzelski 1996 ). The taken particular y values point to a certain surfactants structure morphology as follows: values of y lower than 3.5 represent an uniformly spatially mixed film (so-called “good “solvent condition), for y ~ 8 (“theta solvent condition”) film heterogeneity as surface aggregates or 2D micelles of film compounds is expected to appear, and finally largest y values (> 10–16; “poor” solvent condition) correspond to a horizontally layered surfactants structure with the most surface-active (and insoluble) component residing on the top of such an interfacial sandwich-like texture.…”

Section: Methodsmentioning

confidence: 99%

Snowpack-stored atmospheric surface-active contaminants traced with snowmelt water surface film rheology

Pogorzelski

Rochowski

Grzegorczyk³

et al. 2020

Environ Sci Pollut Res

View full text Add to dashboard Cite

The aim of the study was to quantify the adsorptive and thermo-elastic properties of snowmelt water surface films and their spatial-temporal evolution with snowpack structure characteristics and the entrapped surface-active organic composition. Surface pressure–area (π-A)T isotherms, surface pressure-temperature (π-T)A isochors, and stress–relaxation (π-t) measurements were performed using a Langmuir trough system on snowmelt water samples collected in a large-scale field studies performed at several industrialized and rural Tricity (Gdansk, Poland) areas at various environmental conditions and subsequent stages of the snowpack melting progress. Since the snow-melted water composition and concentrations of surface active organic matter fractions therein are largely undetermined, the force-area isotherm scaling formalisms (2D virial equation and 2D film scaling theory of polymeric films) were adapted to the complex mixture of surfactants. The surface film parameters and their spatial and temporal evolution turned out to be unequivocally related to principal signatures of the film-forming materials: surfactant concentrations (π, Alim), surface activity (Eisoth, |E|), film material solubility (R), surface material miscibility and 2D architecture complexity (y, βs), molecular thermal mobility (πk), and a timescale of the relaxation processes within the film (τi, |E|). Moreover, the parameters appeared to be correlated with snowpack structure characteristics (snow density ρ, specific snow area SSA, snow cover thickness), sample age time, and anthropogenic atmospheric contamination pressure source locations. In particular, Eisoth was found to be related to ρ and SSA, while R correlated with the solubility of film-forming organics which turned out to be long-chain fatty acids; similarly, spatial profiles of Eisoth revealed the peak values next to the areas being under a severe anthropogenic air pollution pressure. Snowmelt water films stand for a structurally heterogeneous (y > 10) interfacial system where several transition processes of differentiated time-scales (relaxation times from 7 to 63 s) took place leading to the apparent surface viscoelasticity. To sum up, the established surface rheological parameters could serve as novel indicators, based solely on physical attributes, allowing to follow the snowpack evolution, and its melting polymorphism in order to test or improve the existing snow-entrapped organics release models based on chemical analyses. The cross-correlation functional dependences of practical value remain to be established on the larger data set.

show abstract

Application of 2D polymer film scaling theory to natural sea surface films

Cited by 9 publications

References 31 publications

Surface Rheology Parameters of Source-Specific Surfactant Films as Indicators of Organic Matter Dynamics

Surface Rheology Parameters of Source-Specific Surfactant Films as Indicators of Organic Matter Dynamics

Evolution of natural sea surface films: a new quantification formalism based on multidimensional space vector

Snowpack-stored atmospheric surface-active contaminants traced with snowmelt water surface film rheology

Contact Info

Product

Resources

About