Study of the advancing and receding contact angles: liquid sorption as a cause of contact angle hysteresis

Lam, C.N. Catherine; Wu, Rebecca; Li, D; Hair, Michael L.; Neumann, A. W.

doi:10.1016/s0001-8686(01)00080-x

Cited by 328 publications

(264 citation statements)

References 43 publications

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“…In order to understand how the partial wetting is possible in this case, Starov and Velarde discussed more complicated forms of disjoining pressure, comprising the London-van der Waals, double layer and structural contributions given by Eqs. (29), (30). They considered more complicated disjoining pressure isotherms, such as those depicted in Fig.…”

Section: Considering the Influence Of Absorbed Liquid Layers And The mentioning

confidence: 99%

“…High contact angle hysteresis has been observed also for atomically smooth polymer substrates. Lam et al used polymer-coated silicon wafers for study of the contact angle hysteresis, and reported the values of contact angle hysteresis on the order of tens of degrees [30] The question is: how is such dispersion of contact angles possible, in contradiction to the predictions of the Young equation?…”

Section: Contact Angle Hysteresis On Smooth Homogeneous Substratesmentioning

confidence: 99%

“…Thus, the contact angle hysteresis on ideal surfaces is caused by the intermolecular interaction between molecules constituting a solid substrate and a liquid; this interaction pins the triple line and gives rise to a diversity of experimentally observed contact angles [30,31].…”

Section: Contact Angle Hysteresis On Smooth Homogeneous Substratesmentioning

confidence: 99%

“…Actually the spectrum of apparent contact angles is observed on real surfaces. A diversity of physical factors contributes to the contact angle hysteresis, including the pinning of the triple line, liquid penetration and surface swelling, deformation of the substrate, etc [12,30]. It should be emphasized that the contact angle hysteresis turned out to be a complicated, time-dependent effect.…”

Section: Contact Angle Hysteresis On Real Surfacesmentioning

confidence: 99%

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Physics of solid–liquid interfaces: From the Young equation to the superhydrophobicity (Review Article)

Bormashenko

2016

Low Temperature Physics

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The state-of-art in the field of physics of phenomena occurring at solid/liquid interfaces is presented. The notions of modern physics of wetting are introduced and discussed including: the contact angle hysteresis, disjoining pressure and wetting transitions. The physics of low temperature wetting phenomena is treated. The general variational approach to interfacial problems, based on the application of the transversality conditions to variational problems with free endpoints is presented. It is demonstrated that main equations, predicting contact angles, namely the Young, Wenzel and Cassie-Baxter equations arise from imposing the transversality conditions on the appropriate variational problem of wetting. Recently discovered effects such as superhydrophobicity, the rose petal effect and the molecular dynamic of capillarity are reviewed.

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Section: Considering the Influence Of Absorbed Liquid Layers And The mentioning

confidence: 99%

Section: Contact Angle Hysteresis On Smooth Homogeneous Substratesmentioning

confidence: 99%

Section: Contact Angle Hysteresis On Smooth Homogeneous Substratesmentioning

confidence: 99%

Section: Contact Angle Hysteresis On Real Surfacesmentioning

confidence: 99%

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Physics of solid–liquid interfaces: From the Young equation to the superhydrophobicity (Review Article)

Bormashenko

2016

Low Temperature Physics

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“…It is a common measure of the hydrophobicity of a solid surface. It is well established that the contact angle measurements does not only gives information on the surface wettability but can be used in the calculation of solid surface energy [15].…”

Section: Introductionmentioning

confidence: 99%

Phosphonic acid derivatives used in self assembled layers against metal corrosion

Abohalkuma¹,

Shawish²,

Telegdi³

2014

Int. J. Corros. Scale Inhib.

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The preparation of self assembled molecular (SAM) layers needs molecules with a small hydrophilic and a big hydrophobic molecular parts. Special molecules were chosen where the head group was in all cases phosphonic group, but there were significant differences in the other molecular part. In one case a medium sized carbon chain with a single double bound, in the second case a long alkyl chain with fluoro atoms, and in the third case a polymer molecular part represented the hydrophobic molecular section. Our work was focused on the preparation and characterization of their SAM layers they formed on solid surfaces under the different conditions. The molecular films were deposited from organic solvents on different metal surfaces covered by oxide layer. In the case of the layer with double bounds, polymerization of the molecules on the surface with UV light was applied. The modified surfaces were characterized by the wettability and their anti-corrosion activity was determined in linear polarization experiments.According to the numerical results the wettability of the surfaces differed significantly, i.e., we successfully modify the solid surface with the coatings. The anticorrosion activity of the coated surfaces depends on the molecules used for layer deposition. The samples with fluoro-alkyl chains gave the best results, not only their contact angles were very high but their anti-corrosion effectiveness was the best.

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The change in contact angle at unsaturated CO₂‐water conditions: Implication on geological carbon dioxide sequestration

Jafari

Jung

2016

Geochem Geophys Geosyst

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The performance of a geologic carbon storage site strongly depends on the capillary pressure of sealing rock and formations. While wettability of minerals is a key factor in capillary pressure, published contact angles are inconsistent. This study explores the discrepancy of published contact angles in order to reduce the uncertainty of measured laboratory contact angles, and understand the variation of contact angles at unsaturated CO 2 -water conditions. A ratio of droplet dimension and triple line (or contact line) are used to explain the observed wide range of contact angles and the variation of contact angle at unsaturated conditions. Results show that the shape factor has a good agreement with contact angle change during CO 2 dissolution in water. Silica substrate has clear two pinned and slip stages of triple line during CO 2 droplet dissolution, which cause contact angle on silica substrate to increase from 34.58 to 42.18. However, mica substrate has the repeated pinned and slip stages due to the heterogeneity of mica surface, which cause contact angle to increase dramatically from 25.48 to 68.18. Thus, both the impact of the unsaturated CO 2 -water conditions on the wide range of contact angle and the heterogeneity of mineral surface should be considered when one estimates capillary pressure based on contact angle in geological CO 2 sequestration. R( 1) where P C is capillary pressure, P CO2 is CO 2 pressure, P water is water pressure, c CO2-water is the water-CO 2 interfacial tension, h is the water contact angle on mineral surface, and R is pore radius.

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Study of the advancing and receding contact angles: liquid sorption as a cause of contact angle hysteresis

Cited by 328 publications

References 43 publications

Physics of solid–liquid interfaces: From the Young equation to the superhydrophobicity (Review Article)

Physics of solid–liquid interfaces: From the Young equation to the superhydrophobicity (Review Article)

Phosphonic acid derivatives used in self assembled layers against metal corrosion

The change in contact angle at unsaturated CO₂‐water conditions: Implication on geological carbon dioxide sequestration

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Study of the advancing and receding contact angles: liquid sorption as a cause of contact angle hysteresis

Cited by 328 publications

References 43 publications

Physics of solid–liquid interfaces: From the Young equation to the superhydrophobicity (Review Article)

Physics of solid–liquid interfaces: From the Young equation to the superhydrophobicity (Review Article)

Phosphonic acid derivatives used in self assembled layers against metal corrosion

The change in contact angle at unsaturated CO2‐water conditions: Implication on geological carbon dioxide sequestration

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Product

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The change in contact angle at unsaturated CO₂‐water conditions: Implication on geological carbon dioxide sequestration