Effect on Wettability of FEP Teflon Surface Morphology

Hara, Katsuyuki; Schonhorn, H.

doi:10.1080/0021846708544585

Cited by 15 publications

(1 citation statement)

References 14 publications

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“…When we dripped a small amount of ZLI-4389 to the Teflon hole, a droplet with nearly spherical shape and minimal surface-to-volume ratio was formed. This results from the low surface tension of Teflon (γ ∼ 18 mN m −1 ) at room temperature [19]. Another Teflon-coated glass plate was used as the top substrate to sandwich the LC droplet.…”

Section: Cell Fabricationmentioning

confidence: 99%

Fringing field stretching of a pillared liquid crystal droplet

Ren¹,

Wu²

2011

J. Phys. D: Appl. Phys.

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We demonstrate a liquid crystal (LC) droplet whose surface profile could be deformed by a fringing field. In the voltage-off state, the LC droplet exhibits a pillared shape by touching both substrates. As the voltage increases, such a droplet could be stretched to a cone-like shape or thin film. For a 1.5 mm aperture LC droplet, its occupied area could be expanded by ∼4.3× at 6.5 V rms µm −1. Upon removing the voltage, the droplet could fully recover to its original shape. The shape stretching and recovering time are dependent on the expanded area. With the support of silicon oil around the droplet, the device is stable and the gravity effect is negligible.

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Section: Cell Fabricationmentioning

confidence: 99%

Fringing field stretching of a pillared liquid crystal droplet

Ren¹,

Wu²

2011

J. Phys. D: Appl. Phys.

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Beeingflussung der Oberflächenspannung von Polyestern

Mayrhofer¹,

Sell²

1971

Angew. Makromol. Chem.

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ZUSAMMENFASSUNG :Lineare gesattigte Polyester (die Lange der Kohlenwasserstoff-Kette der zur Synthese benutzten Diole und Dicarbonsauren wird mit den Zahlen 2.2, 4.4, 6.6, 8.8, 10.10 angegeben) wurden in aquimolaren Ansatzen hergestellt.Diese Polyester wurden geschmolzen, getempert und auf verschiedenen Unterlagen (Teflon, Polyathylen, Polyamid, Glas und Glimmer) langsam zum Auskristallisieren gebracht.Durch Messung der Randwinkel verschiedener Flussigkeiten auf den PolyesterOberflachen konnten je nach Erstarrungsunterlage verschiedene Benetzungsdaten bzw. Festkorperoberflachenspannungen bestimmt werden. SUMMARY:Linear saturated polyesters (the length of the hydrocarbon chains of the dialcohols and dicarboxylic acids used in the synthesis are 2.2, 4.4, 6.6, 8.8 and 10.10) were synthesized in equimolecular proportions.These polyesters were melted, tempered and allowed to solidify, slowly on various substrates (Teflon, polyethylene, polyamide, glass and muscovite mica).By measuring the contact angle of various liquids on the polyester surfaces, the wetting properties and the solid surface tensions respectively, corresponding to the substrates on which they were solidified, were determined. Die Oberflacheneigenschaften von Polymeren sind abhangig vom Charakter der Oberflachenschicht, z. B. von der chemischen Struktur, der Orientierung

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Surface modification of polymers and practical adhesion

Schonhorn¹,

Frisch

Gaines

1977

Polymer Engineering & Sci

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The, nature of polymer surfaces has received increasing attention as the use of these materials, in a variety of forms, increases yearly. Modifications of polymer surfaces for adhesion, friction, and diffusion oriented appiications have necessitated a careful analysis of the surfade region morphology (surface physics) and chemical properties of the surface layer (surface chemistry). The behavior of composite structures has involved the discipline of classical fracture mechanics. The orientation of polymeric species or additives which migrate to the interface may modify the wetting characteristics and, most certainly, the frictional properties in addition to the diffusion of penetrant species beyond the boundary layer. The above topics are discussed within the framework of recent analytical and theoretical developments in surface science. The findings of these recent studies have facilitated many exciting technological advances.

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Effect on Wettability of FEP Teflon Surface Morphology

Cited by 15 publications

References 14 publications

Fringing field stretching of a pillared liquid crystal droplet

Fringing field stretching of a pillared liquid crystal droplet

Beeingflussung der Oberflächenspannung von Polyestern

Surface modification of polymers and practical adhesion

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