The elimination of errors due to evaporation of the solute in the determination of surface tensions

Hommelen, Jacques R

doi:10.1016/0095-8522(59)90003-0

Cited by 70 publications

(41 citation statements)

References 19 publications

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“…Provided that  is independent of n, Eq. (50) suggests that if  S is plotted against C×exp(nCH 2 /kBT), where the value CH 2 /kBT = 1.04 for W|A is used, data for all homologues must fall on a single master curve. This is demonstrated in Fig.…”

Section: S9 Application Of the Adsorption Models To Data For N-alkylmentioning

confidence: 99%

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Adsorption parameters and phase behaviour of non-ionic surfactants at liquid interfaces

Slavchov

Ivanov

2017

Soft Matter

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A reasonable adsorption model is one that allows all adsorption parameters (adsorption constant, hard-disc area α, attraction parameter β) of a surfactant at a liquid interface to be predicted accurately as a function of the molecular structure and medium conditions. However, the established adsorption models of van der Waals and Frumkin lead to inconsistencies, such as negative β at water|oil, α significantly larger than the crystallographic area of the molecule, and phase behaviour that contradicts the experimental observations. Several less popular models that are better suited for liquid interfaces are investigated. It is shown that the sticky disc model agrees with the observed adsorption behaviour of several homologous series of surfactants, both at water|air and water|oil interfaces. The area α is independent of the interface and agrees within 6% to what follows from collapse and crystallographic data. A model of the lateral attraction is proposed, from which it follows that β has a strongly non-linear dependence on the hydrocarbon chain length, the area of the head group and the temperature. Using the model of β, experimental data, and the law of corresponding states, the critical point of the adsorbed layer could be determined. Depending on the value of β, the adsorption behaviour of the surfactants at liquid interfaces can be classified into distinct categories: cohesive or non-cohesive, based on their Boyle points (where β = 2), and sub-critical or super-critical, based on their critical points (where β = 38.1).

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Section: S9 Application Of the Adsorption Models To Data For N-alkylmentioning

confidence: 99%

“…This surfactant behaves non-cohesively at W|O and cohesively at W|A. Data from Refs [29][30][31][50][51][52][53]. have been used.…”

mentioning

confidence: 99%

Adsorption parameters and phase behaviour of non-ionic surfactants at liquid interfaces

Slavchov

Ivanov

2017

Soft Matter

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“…For 1-decanolsolutions parameters B and a of the Szyszkowski Equation have been evaluated from the data published in Ref. [2], were the static surface tension has been measured using ring tensiometer. Table S2.…”

Section: Evaluation Of Surface Tension According To Ward-tordai Modelmentioning

confidence: 99%

“…Odor-triggering activity is an important part of specific signaling pathways in olfactory system, an evolutionally evolved remarkable molecular sensing mechanism. [2] Features of molecules which can act as odorant-triggers are typically considered in terms of molecular weight, geometry, chirality, flexibility (vibrational frequencies and rotation), as well as biochemical (enzymatic) influence. Applications of aroma molecules are currently related to their biological activities (odor, antioxidant, antimicrobial).…”

Section: Introductionmentioning

confidence: 99%

Aroma Molecules as Dynamic Volatile Surfactants: Functionality Beyond the Scent

Соболева¹,

Проценко²,

Korolev³

et al. 2019

Preprint

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The research presented here unveils specific interfacial behavior of aroma molecules and justifies their usage as multifunctional volatile surfactants. As non-conventional volatile amphiphiles we study commercially available poorly water-soluble compounds from the classes of synthetic and essential flavor oils. Their distinctive feature is high dynamic interfacial activity, so that they decrease the surface tension of aqueous solutions on a time scale of milliseconds. Another potentially useful property of such amphiphiles is their volatility, so that they notably evaporate from interfaces on a time scale of seconds. This behavior allows for control of wetting and spreading processes. A revealed synergetic interfacial behavior of mixtures of conventional and volatile surfactants is attributed to a decrease of the adsorption barrier as a result of high statistical availability of new sites at the surface upon evaporation of the volatile component. Our results offer promising advantages in manufacturing technologies which involve newly creating interfaces, such as spraying, coating technologies, ink-jet printing, microfluidics, laundry, stabilization of emulsions in cosmetic and food industry, as well as in geosciences for controlling aerosols formation.

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“…Alcohol evaporates in the hot region of the surface and condenses in the cold one. It has been shown theoretically (5) and experimentally (6) that alcohol evaporation increases the surface tension. Thus, it is reasonable to assume that alcohol condensation has nearly the opposite effect.…”

Section: Introductionmentioning

confidence: 98%