Constitutive modeling of contact angle hysteresis

Vedantam, Srikanth; Panchagnula, Mahesh V.

doi:10.1016/j.jcis.2008.01.056

Cited by 41 publications

(24 citation statements)

References 50 publications

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“…Various models explaining the phenomenon of hysteresis have been proposed (Joanny & de Gennes 1984;Nosonovsky 2007a;Vedantam & Panchagnula 2008;Whyman et al 2008). The effect was related to pinning of the triple line by defects.…”

Section: Wetting Statesmentioning

confidence: 99%

Wetting transitions on biomimetic surfaces

Bormashenko

2010

Phil. Trans. R. Soc. A.

126

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Biomimetic hierarchical surfaces demonstrate a potential for a variety of green technologies, including energy conversion and conservation, owing to their remarkable water repellence. The design of such surfaces allowing emerging green applications remains a challenging scientific and technological task. Understanding the physical mechanism of wetting transitions (WTs) is crucial for the design of highly stable superhydrophobic materials. The main experimental and theoretical approaches to WTs are reviewed. Reducing the micro-structural scales is the most efficient measure needed to enlarge the threshold pressure of WTs. The trends of future investigations are envisaged.

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Section: Wetting Statesmentioning

confidence: 99%

Wetting transitions on biomimetic surfaces

Bormashenko

2010

Phil. Trans. R. Soc. A.

126

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“…Hysteresis plays a special role in practical capillary problems, especially where superhydrophobicity of a surface is required [47][48][49]. This phenomenon is mostly attributed to surface roughness and chemical heterogeneity of a geometrical surface, among other factors [20,46,50,51]. A very detailed theoretical analysis on contact angle hysteresis has been done by Joanny and de Gennes [52].…”

Section: Contact Angle Hysteresismentioning

confidence: 99%

Progress in Wettability Study of Reactive Systems

Komolafe

Medraj

2014

Journal of Metallurgy

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A review of various factors affecting wetting and spreading has been presented. Various methods for wettability studies and critical issues concerning contact angle measurement are discussed. Reactive wetting has been given a special attention in the paper and recent developments in this area are summarized and discussed. Although advanced understanding of nonreactive wetting is currently available in the literature, complete understanding of reactive wetting is still lacking due to the complexity of the phenomenon. To date, there is no single model that is generally applicable to all reactive wetting systems. Reaction between the liquid drop and substrate can take the form of dissolution, intermetallic formation, or combination of both processes. Factors affecting wettability have been summarized and discussed as well as the major available techniques to investigate wetting behaviour.

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“…High wettability occurs at a low contact angle < 90°, and hydrophobicity at a high contact angle > 90°. The contact angle can be used to determine surface tension [34] and define surface free energy (SFE) [35] and adhesion operation [36]. Specific adhesion can be evaluated by studying the interfacial and surface forces acting at the interface, which specifies the conditions for good wettability and spreading.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Contact Angle of Hydrophobised Lightweight-Aggregate Concrete with Sewage Sludge

Barnat-Hunek

Smarzewski

Łagód

et al. 2015

Ecological Chemistry and Engineering S

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Abstract:The aim of the research presented in the paper was to evaluate the feasibility of using hydrophobic preparations based on organosilicon compounds for protection treatment of lightweight aggregates modified with municipal sewage sludge. Issues related to the wettability of the surface layer of hydrophobised lightweight-aggregate concrete supplemented with sewage sludge are discussed in the paper. The experimental part of the study is focused on the physical and mechanical characteristics of lightweight-aggregate concrete and the effect of two hydrophobic preparations on the contact angle of the material. The contact angle for lightweight concrete (θw) was determined as a function of time using one measurement liquid. The hydrophobic coatings in the structure of lightweight concrete modified with sewage sludge were shown using electron microscopy. The investigations demonstrated the effectiveness of hydrophobisation of porous lightweight concretes. On the hydrophobic surfaces, the contact angles decreased with time and depended on the preparations used. The results of the research confirm the possibility to produce lightweight aggregate-concretes modified with sewage sludge with appropriate surface protection against external moisture.

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Constitutive modeling of contact angle hysteresis

Cited by 41 publications

References 50 publications

Wetting transitions on biomimetic surfaces

Wetting transitions on biomimetic surfaces

Progress in Wettability Study of Reactive Systems

Evaluation of the Contact Angle of Hydrophobised Lightweight-Aggregate Concrete with Sewage Sludge

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