Fractals in geometry of carbon black

El'tekova, N. A.; Razd'yakonova, G.I.; Eltekov, Yu. A.

doi:10.1351/pac199365102217

Cited by 9 publications

(4 citation statements)

References 3 publications

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“…In the as-received CB powder individual spherical carbon particles are loosely packed into large fractal-like aggregates [15,27] and prone to further agglomeration in dispersion. Dispersion of the native aggregates and agglomerates may be facilitated using dispersing aids.…”

Section: Conductive Composite Supportsmentioning

confidence: 99%

Thin-film composite nanofiltration membranes prepared by electropolymerization

et al. 2008

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A novel approach to preparation of composite asymmetric nanofiltration membranes is reported based on a thin selective layer deposited by electropolymerization (EP) on top of an asymmetrically porous and electronically conductive porous support. Support films with ultrafiltration characteristics were cast from a concentrated dispersion of carbon black particles, a few tens of nanometers large, in a solution of polysulfone followed by precipitation in a non-solvent bath (phase inversion). Composite membranes with poly(phenylene oxide) and polyaniline thin top layers were prepared by EP deposition from solutions of phenol and aniline, respectively, of which polyaniline film demonstrated a dense uniform structure and water flux and rejection to sucrose and magnesium sulfate in the nanofiltration range.

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Section: Conductive Composite Supportsmentioning

confidence: 99%

Thin-film composite nanofiltration membranes prepared by electropolymerization

et al. 2008

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“…Adsorption from solutions differs from single-gas adsorption: (i) the liquid mixture contains at least two components, each of which is adsorbed in the porous volume; (ii) the adsorption volume of AC placed in a solution is always filled with solution components, and θ = 1; (iii) the excess adsorption of solute molecules in a micropore space results in a solvent displacement from micropores. In many papers − devoted to the adsorption from dilute solutions the authors applied the D−A gas/solid adsorption isotherm by replacing the adsorbate pressure with the solute concentration. Such empirical treatment had resulted in the discovery of a number of important facts.…”

Section: Introductionmentioning

confidence: 99%

Potential Theory of Adsorption of Nonelectrolytes from Dilute Aqueous Solutions. Benzene Adsorption

Dobruskin¹

1996

Langmuir

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The equilibrium relationship is derived from the potential theory of adsorption, the concept of micropore volume filling, and assumptions that solute adsorption results in a solvent displacement from micropores and in a formation of an interface between an adsorbed phase in micropores and a solution in an extramicropore space. Water desorption from micropores is characterized by the affinity coefficient which is estimated from immersion heats. The energy of the interface formation is calculated from a model of active carbon structure. An isotherm equation shows the relationship between adsorption of the organic component in micropores, on the one hand, and parameters of active carbons (limiting adsorption volume, micropore volume, characteristic energy, immersion heats, interface area), parameters of solution components (solute and solvent affinity coefficients, interfacial tension, saturated concentration, molar volumes), and conditions of operation (temperature, equilibrium concentration), on the other hand. The correlation between adsorption from aqueous solutions and both the carbon crystallite sizes and the oxygen complexes on the carbon surface is predicted. The main results are discussed in terms of the Weibull distribution function, and the generalized equation is proposed. The theory has been successfully applied to published data for adsorption of benzene from aqueous solutions on active carbons. It is pointed out that there is an urgent need for more independent studies, and a number of suggestions for future work are given.

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“…Considerable attention to the processes of the transformation of FA in humid atmosphere was given by Lesafre [1989], Huang et al [1994], Colbeck [1995a, 1995b] and Ramachandran and Reist [1995] to the process the transformation of FA in humid atmosphere. The chemical methods were applied by Eltekova et al [1993] for determining of soot FA. The value of fractal prefactor was discussed by Nyeki and Colbeck [1995a] who showed that is close to 1.…”

Section: Phenomenology Of Atmospheric Famentioning

confidence: 99%

Fractal aggregates in the atmosphere

Lushnikov¹,

Гвишиани²,

Lyubovtseva³

2013

Russ. J. Earth Sci.

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In this paper we consider the properties of fractal aggregates suspended in the Earth atmosphere. Fractal aggregates (FA) are now well established to appear in numerous natural and anthropogenic processes. Their role in the atmosphere is immense, for FA possess anomalous physico-chemical, mechanical and optical properties making them extremely effective atmospheric agents. The main goal of this paper is to overview the mechanisms of FA formation, their properties, to discuss sources and sinks of the atmospheric FA and their possible contribution into intra-atmospheric processes and influence on the public health.

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Fractals in geometry of carbon black

Abstract: Abstract

Cited by 9 publications

References 3 publications

Thin-film composite nanofiltration membranes prepared by electropolymerization

Thin-film composite nanofiltration membranes prepared by electropolymerization

Potential Theory of Adsorption of Nonelectrolytes from Dilute Aqueous Solutions. Benzene Adsorption

Fractal aggregates in the atmosphere

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