Surface Roughness as Related to Hysteresis of Contact Angles. II. The Systems Paraffin–3 Molar Calcium Chloride Solution–Air and Paraffin–Glycerol–Air

Bartell, F. E.; Shepard, J. W.

doi:10.1021/j150505a015

Cited by 148 publications

(109 citation statements)

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“…The works of Pease, 27 Bartell and Shepard, 28 and Extrand 29 also provide explanations of superhydrophobicity, in addition to the common Wenzel and Cassie theories. 7 Two of us recently contended 7 that interfacial area (the r in Equation 2 and f 1 and f 2 in Equation 3) does not affect the degree of hydrophobicity and that modeling contact angles onedimensionally, from the perspective of the contact line, better explains surface behavior.…”

Section: Contact-line Issuesmentioning

confidence: 99%

Superhydrophobicity and Contact-Line Issues

Gao¹,

Fadeev²,

McCarthy³

2008

MRS Bull.

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The wettability of several superhydrophobic surfaces that were prepared recently by simple, mostly single-step methods is described and compared with the wettability of surfaces that are less hydrophobic. We explain why two length scales of topography can be important for controlling the hydrophobicity of some surfaces (the lotus effect). Contactangle hysteresis (difference between the advancing, θ A , and receding, θ R , contact angles) is discussed and explained, particularly with regard to its contribution to water repellency. Perfect hydrophobicity (θ A /θ R = 180°/180°) and a method for distinguishing perfectly hydrophobic surfaces from those that are almost perfectly hydrophobic are described and discussed. The Wenzel and Cassie theories, both of which involve analysis of interfacial (solid/liquid) areas and not contact lines, are criticized. Each of these related topics is addressed from the perspective of the three-phase (solid/liquid/vapor) contact line and its dynamics. The energy barriers for movement of the three-phase contact line from one metastable state to another control contact-angle hysteresis and, thus, water repellency.

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Section: Contact-line Issuesmentioning

confidence: 99%

Superhydrophobicity and Contact-Line Issues

Gao¹,

Fadeev²,

McCarthy³

2008

MRS Bull.

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“…The methods that have been developed so far to impart roughness to solid surfaces include mechanical abrasion, 17) the addition of fillers (silica, 18) 22) pyrolysis, 56), 57) cutting, 58), 59) lithography, 60) and crystallization control. 61) Low surface energy is produced using coating, mixing, or polymerizing lowsurfaceenergy materials such as fluoro alkylsilane (heptadecafluorodecyltrichlorosilane, 30) perfluo rooctyltrichlorosilane 45) , heptadecafluorodecyltrimethoxysi lane, 20 48) .…”

Section: Superhydrophobic Coatings 21 Hydrophobicity and Surface Roumentioning

confidence: 99%

Design of a Transparent Hydrophobic Coating

Nakajima

2004

J. Ceram. Soc. Japan

118

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“…Two approaches have been commonly used. The first one is to pattern hydrophobic surfaces by mechanical machining, 3 micromolding texturation, 4,5 plasma etching, 6 or nanosphere lithography. 7 For instance, Bico et al 4 fabricated a superhydrophobic material by texturing a surface with periodic, micrometer-size silica features (e.g., wells, plateaus, channels, and flat mesas) produced on a substrate with a micromolding technique.…”

Section: Introductionmentioning

confidence: 99%

Simple route to get very hydrophobic surfaces of fibrous materials with core–shell latex particles

Nguyen

Chambon

Rosselgong

et al. 2008

J of Applied Polymer Sci

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The aim of this article is to report the creation of artificial, robust, and very hydrophobic materials with core-shell polyurethane-polydimethylsiloxane or polyurethane-poly(n-butyl acrylate) polymer microparticles. These latexes were prepared by polyaddition in cyclohexane with commercial or synthetic steric stabilizers. An easy onestep method based on the filtration of the colloidal particles was developed to obtain water-repellent fibrous materials such as paper or textiles that maintain stable properties even after several washing/drying cycles.

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Surface Roughness as Related to Hysteresis of Contact Angles. II. The Systems Paraffin–3 Molar Calcium Chloride Solution–Air and Paraffin–Glycerol–Air

Cited by 148 publications

References 0 publications

Superhydrophobicity and Contact-Line Issues

Superhydrophobicity and Contact-Line Issues

Design of a Transparent Hydrophobic Coating

Simple route to get very hydrophobic surfaces of fibrous materials with core–shell latex particles

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