The effect of surface roughening of polymers on measured contact angles of liquids

Busscher, Henk J.; Pelt, A. W. J. van; Boer, Pascal de; Jong, H. P. de; Arends, J

doi:10.1016/0166-6622(84)80175-4

Cited by 461 publications

(237 citation statements)

References 9 publications

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“…All calculations were done with eight contact angle values per fluid measured on eight different scales of each body region from each individual exuvia. Surface tension data of the three applied liquids were taken from previous studies (water, diiodomethane: [23]; ethylene glycol: [24]). …”

Section: Methodsmentioning

confidence: 99%

Diversity of functional microornamentation in slithering geckosLialis(Pygopodidae)

2013

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The skin of geckos is covered with countless microscopic protuberances (spines). This surface structure causes low wettability to water. During evolution, representatives of the recent gekkotan clade Pygopodidae started slithering on the ground. This manner of locomotion affected limb reduction resulting in a snake-like body. Regarding abrasion and frictional properties, a surface covered with gekkotan spines is a topography that hampers the snake-like locomotion mode. Using scanning electron microscopy, we investigated the shed skins of two pygopodid lizards, Lialis jicari (Papua snake lizard) and Lialis burtonis (Burton's legless lizard), in order to show epidermal adaptations to limbless locomotion. Our data showed that Pygopodidae differ from their relatives not only anatomically, but also in their epidermal microstructure. Scales of L. jicari have five different structural patterns on various body regions. Ventral scales have nanoridges, similar to those found on the ventralia of snakes. Surfaces of scales covering the jaw bones, have flattened spine-like microstructures that might be an adaptation to reduce abrasion. Dorsal scales have oblong microscopic bulges covered with nanoridges. Spines cover the undersides and the interstices of scales over the entire body of both species and in L. jicari also the top of dorsal head scales. Our measurements of surface wettability (surface free energy) show superhydrophobic properties of the spiny surfaces in comparison with the other microstructural patterns of other body parts.

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Section: Methodsmentioning

confidence: 99%

Diversity of functional microornamentation in slithering geckosLialis(Pygopodidae)

2013

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“…The results from this work also show that surface roughness influences the wetting of the pp-GT, even at extremely low R q values. Busscher et al [63] and Hitchcock et al [64] reported similar effects of roughness on the wettability of several polymers. The effect of surface roughness on the wettability of pp-GT is therefore needed to be considered for potential applications.…”

Section: Effect Of Surface Roughness On Wettabilitymentioning

confidence: 67%

Wetting, Solubility and Chemical Characteristics of Plasma-Polymerized 1-Isopropyl-4-Methyl-1,4-Cyclohexadiene Thin Films

et al. 2014

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Investigations on the wetting, solubility and chemical composition of plasma polymer thin films provide an insight into the feasibility of implementing these polymeric materials in organic electronics, particularly where wet solution processing is involved. In this study, thin films were prepared from 1-isopropyl-4-methyl-1,4-cyclohexadiene (γ-Terpinene) using radio frequency (RF) plasma polymerization. FTIR showed the polymers to be structurally dissimilar to the original monomer and highly cross-linked, where the loss of original functional groups and the degree of cross-linking increased with deposition power. The polymer surfaces were hydrocarbon-rich, with oxygen present in the form of O-H and C=O functional groups. The oxygen content decreased with deposition power, with films becoming more hydrophobic and, thus, less wettable. The advancing and receding contact angles were investigated, and the water advancing contact angle was found to increase from 63.14° to 73.53° for thin films prepared with an RF power of 10 W to 75 W. The wetting envelopes for the surfaces were constructed to enable the prediction of the surfaces' wettability for other solvents. The effect of roughness on the wetting behaviour of the films was insignificant. The polymers were determined to resist solubilization in solvents commonly used in the deposition of organic semiconducting layers, including chloroform and chlorobenzene, with higher stability observed in films fabricated at higher RF power. OPEN ACCESSCoatings 2014, 4 528

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“…For roughness the R a (arithmetic average roughness) values were measured on coated and temperature treated alumina plates (Figure 7b). According to ref., [32] a higher roughness increases the contact angles on the surface if they are higher than 86 and decreases contact angles smaller than 60 . The R a values fluctuate with the pyrolysis temperature from the coated plates.…”

Section: Contact Angle and Surface Structurementioning

confidence: 99%

“…Because it is known that the wettability is influenced not only by its chemical composition, but also by its microstructure and roughness, [31][32][33] SEM images of the coated foam surfaces for each pyrolysis temperature were taken (Figure 7a). For roughness the R a (arithmetic average roughness) values were measured on coated and temperature treated alumina plates (Figure 7b).…”

Section: Contact Angle and Surface Structurementioning

confidence: 99%

Tailored Surface Properties of Ceramic Foams for Liquid Multiphase Reactions

et al. 2017

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Open cellular ceramic foams are prepared using the replica method. In a second step, these foams are coated with a pre-ceramic or polymer-derived ceramic coating, respectively. Polymer-to-ceramic transformation is studied by SEM with respect to the microstructure, functional groups are characterized by Raman microscopy, density and porosity are determined by pycnometer measurements as well as the surface free energy by means of contact angle measurements. By pyrolysis at different temperatures between 403 and 1273 K, the surface wettability is adjusted in a wide range from hydrophilic to hydrophobic due to the release of organic groups from the pre-ceramic polymers in terms of polymer-toceramic transformation. Coated foams are tested in a new potential application: as reactor internals to increase the liquid-liquid interface area in a homogeneously catalyzed multiphase system. As model reaction, a reactive extraction of an organic dye was used and the influence of the surface energy of the foam on the phase dispersion/reaction rate is discussed. The coated foams are able to increase the reaction rate to an extent depending on the surface wettability.

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The effect of surface roughening of polymers on measured contact angles of liquids

Cited by 461 publications

References 9 publications

Diversity of functional microornamentation in slithering geckosLialis(Pygopodidae)

Diversity of functional microornamentation in slithering geckosLialis(Pygopodidae)

Wetting, Solubility and Chemical Characteristics of Plasma-Polymerized 1-Isopropyl-4-Methyl-1,4-Cyclohexadiene Thin Films

Tailored Surface Properties of Ceramic Foams for Liquid Multiphase Reactions

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