Experimental Separation of the Electrostatic and Steric Repulsion Effects in Thin Aqueous Electrolyte Layers Between Two Solid Surfaces

Peschel, G.; Belouschek, P.

doi:10.1524/zpch.1977.108.2.145

Cited by 18 publications

(11 citation statements)

References 18 publications

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“…It appears that in the distance regime 6 nm < h < 20 nm a deviation to higher repulsive effects is manifest. An analogous behaviour is reported by Israelachvili and Adams [5] and Pashley [7,8], who point out that in this regime the repulsion data obviously lie between constant surface potential and constant surface charge conditions. The latter corresponds to higher electrical repulsive effects at closer plate separations.…”

Section: Resultssupporting

confidence: 84%

“…The deficiency of the DLVO theory concerns the drastic rise of the disjoining force for h < 6 nm which is likewise quoted by Israelachvili and Adams [6] and Pashley [7,8]. These findings support the concept of a muhimolecular hydration layer on the solid surface.…”

Section: Resultsmentioning

confidence: 54%

“…The structural disjoining pressure component due to hydration effects was found by Israelachvili and Adams [6] and Pashley [7,8] to be strictly exponential. This feature is reflected by the relation…”

Section: Introductionmentioning

confidence: 82%

“…This work was carried on by Pashley [7,8] using the same method. He made a precise study of the DLVO and hydration forces in thin layers of electrolyte solutions following the lyotropic series Li § Na § K § and Cs +.…”

Section: Introductionmentioning

confidence: 99%

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The interaction of solid surfaces in aqueous systems

Peschel

Belouschek

Müller

et al. 1982

Colloid & Polymer Sci

Self Cite

178

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Abstract:The interaction between two high-grade polished fused silica plates separated by a thin layer of aqueous LiC1, NaCI and KCI solution, respectively, was determined by means of a selfdeveloped method. Concerning the repulsion created by overlap of the electrical double layers excellent agreement with the DLVO theory down to separation of about 5 nm were found. For still smaller separations a relatively strong additional repulsion arises which according to experimental evidence might be assigned to the overlap of hydration layers emanating chiefly from the alkali metal halide ions adsorbed onto the silica surfaces. Our results agree well with those obtained by Israelachvili et al. and Pashley, who used mica sheets.

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Section: Resultssupporting

confidence: 84%

Section: Resultsmentioning

confidence: 54%

Section: Introductionmentioning

confidence: 82%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The interaction of solid surfaces in aqueous systems

Peschel

Belouschek

Müller

et al. 1982

Colloid & Polymer Sci

Self Cite

178

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“…Particles with high values maintain larger distances than those between particles with lower surface-charge densities. mental measurements of such properties as osmotic pressure (Barclay et al, 1972), disjoining pressure (Peschel and Belouschek, 1977), and freezing point depression of water in clay pastes (Helmy et al, 1979). The distances between particles may be obtained from X-ray diffraction methods (Norrish, 1954), and the average water film thickness, i.e., the average distance between the particles, is in turn available from water content measurements if the specific surface area of the sample is also known.…”

Section: Theorymentioning

confidence: 99%

Electrical Potential Between Dissimilar Clay Double Layers

Helmy

Natale

Mandolesi

1982

Clays and clay miner.

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A model describing the electric double layers in clay-electrolyte systems containing particles with different surface charge densities was developed and used to calculate the film thickness of water present in a clay paste. The average water film thicknesses (-18/~) calculated by considering the clay to contain 9 groups of particles of different charge densities did not differ from those calculated by assuming one average charge density; provided the minimum potential between particles remained constant. These values, however, were higher than those obtained from gravimetric water determinations by about 30%. The overestimation of the average thickness of the water films by the theoretical model is most likely due to the assumption of a complete parallel arrangement of particles in the paste and the validity of the Gouy theory for double layers on clays.

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Adsorption von Harnstoffen aus wäßriger Lösung an Aktivkohle

Kümmel

Krusch

1982

Acta hydrochim. hydrobiol.

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Für die Adsorption von Harnstoffen aus wäßriger Lösung an Aktivkohle werden die thermodynamischen Funktionen des Adsorptions‐Desorptionsprozesses im Temperaturbereich von 20 … 40°C ermittelt. Isothermenverlauf und Lage des Adsorptionsgleichgewichts sind stark substituentenabhängig, während das Vorzeichen der Adsorptionsentropie mit dem strukturbildenden bzw. strukturbrechenden Einfluß des Sorptivs auf die Wasserstruktur korreliert. Steigende Elektrolytkonzentration in der flüssigen Phase hemmt die Adsorption der Harnstoffe.

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Experimental Separation of the Electrostatic and Steric Repulsion Effects in Thin Aqueous Electrolyte Layers Between Two Solid Surfaces

Cited by 18 publications

References 18 publications

The interaction of solid surfaces in aqueous systems

The interaction of solid surfaces in aqueous systems

Electrical Potential Between Dissimilar Clay Double Layers

Adsorption von Harnstoffen aus wäßriger Lösung an Aktivkohle

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