Surfactant adsorption at solid-liquid interfaces

Zhu, Bin; Gu, Tingyue

doi:10.1016/0001-8686(91)80037-k

Cited by 211 publications

(185 citation statements)

References 28 publications

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“…In particular, Zhu and Gu [3] have proposed a general adsorption equation, based on a two-step adsorption model, capable of representing Langmuir-type, S-type and two-plateau-type isotherms. A useful form of the general expression is the following limiting case,…”

Section: Resultsmentioning

confidence: 99%

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Adsorption of sodium dodecyl sulfate and sodium dodecyl benzenesulfonate on poly(vinyl chloride) latexes

Vale

McKenna

2005

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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The adsorption of sodium dodecyl sulfate (SDS) and sodium dodecyl benzenesulfonate (SDBS) on poly(vinyl chloride) (PVC) latex particles was investigated. Conductometric titrations were performed to determine the area per surfactant molecule at various temperatures (20-50ºC) and the adsorption isotherms of both emulsifiers were determined at 20ºC from surface tension titration curves. The adsorption data show some deviation with respect to the Langmuir isotherm due to their slight S-shape. The data can nevertheless be fitted very well with a limiting form of the general adsorption equation proposed by Zhu and Gu (Adv. Colloid Interface Sci. 37 (1991) 1).

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Section: Resultsmentioning

confidence: 99%

“…Under equilibrium conditions, the surfactant concentrations in the aqueous phase and at the polymer-water interface are uniquely related by the adsorption isotherm [3].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of sodium dodecyl sulfate and sodium dodecyl benzenesulfonate on poly(vinyl chloride) latexes

Vale

McKenna

2005

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…Lateral interaction between alkyl chains is not uncommon with surfactant adsorption and leads to the initial slope of the isotherm becoming S-shaped. This S-shaped isotherm can be represented by [10,14,15]:…”

Section: Adsorption Isothermmentioning

confidence: 99%

Adsorption of sodium hexanoate on α-alumina

Lee¹,

Welbourn²,

Clarke³

et al. 2013

Journal of Colloid and Interface Science

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a b s t r a c tNeutron reflection and adsorption isotherm measurements have been used to study the adsorption behaviour of hexanoic acid onto a-alumina surfaces. Importantly, the pH dependence of the behaviour has been characterised with a pronounced maximum in adsorption identified at a pH of approximately 5, close to the pK a of the acid. The adsorbed layer is identified as a bilayer, which is reasonable given the hydrophilic nature of both side of the layer, and has a thickness of 13 Å, suggesting significant extent of interdigitation. At pH 5, the layer has much lower extent of hydration relative to the higher pH of 7, consistent with the increased total adsorption at pH 5. A number of different mechanisms for the binding of the hexanoic acid to the surface are considered. The experimental data, combined with calculations using equilibrium/binding constants of the surface and ligands, indicates that a ligand exchange reaction may be the most significant mechanism.

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“…Chemical equilibrium is invariably assumed between the aqueous phase and the surface of the particles. Some authors use a surfactant adsorption isotherm [105], but often the amount of free surfactant in the aqueous phase is neglected. The adsorption of ionic and non-ionic surfactants on latex particles is frequently well described by a simple Langmuir isotherm [106][107][108].…”

Section: Overview Of the Dlvo Approachmentioning

confidence: 99%

Modeling particle size distribution in emulsion polymerization reactors

Vale

McKenna

2005

Progress in Polymer Science

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A review of the use and limitations of Population Balance Equations (PBE) in the modeling of emulsion polymerisation (EP), and in particular of the particle size distribution of the dispersed system is presented. After looking at the construction of the general form of PBEs for EP, a discussion of the different approaches used to model polymerization kinetics is presented. Following this, specific applications are presented in terms of developing a two-dimensional PBE for the modeling of more complex situations (for example the particle size distribution, PSD, and the composition of polymerizing particles). This review demonstrates that while the PBE approach to modeling EP is potentially very useful, certain problems remain to be solved, notably: the need to make simplifying assumptions about the distribution of free radicals in the particles in order to limit the computation complexity of the models; and the reliance of full models on approximate coagulation models. The review finishes by considering the different numerical techniques used to solve PBEs.

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Surfactant adsorption at solid-liquid interfaces

Cited by 211 publications

References 28 publications

Adsorption of sodium dodecyl sulfate and sodium dodecyl benzenesulfonate on poly(vinyl chloride) latexes

Adsorption of sodium dodecyl sulfate and sodium dodecyl benzenesulfonate on poly(vinyl chloride) latexes

Adsorption of sodium hexanoate on α-alumina

Modeling particle size distribution in emulsion polymerization reactors

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