The determination of interfacial tension by video image processing of pendant fluid drops

Anastasiadis, Spiros H.; Chen, J.-K; Koberstein, Jeffrey T.; Siegel, Andrew F.; Sohn, John E.; Emerson, John A.

doi:10.1016/0021-9797(87)90244-x

Cited by 171 publications

(96 citation statements)

References 17 publications

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“…A sharp decrease is predicted below this limit, corresponding to a degree of polymerization of approximately 200, indicating that the components become more miscible, in accordance with our previous observations. Independent interfacial tension measurements obtained with the pendant drop method (Anastasiadis et al, 1987) resulted in an interfacial value of 0.68 mN/m for N PDMS = 250 (Terakawa et al, 2002), in relatively good agreement with the predictions of Equation (4). The fact that interfacial tension varies with the M w of PDMS is also expected to influence the morphology of the blends in the phase-separated region.…”

Section: The Effects Of Pdms Molecular Weight On the Morphology And Imentioning

confidence: 51%

Interrelations between Rheology and Phase Behaviour in Partially Miscible Blends: The Case of Polydimethylsiloxane/Polyethylmethylsiloxane (PDMS/PEMS)

et al. 2002

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A rheological study of the phase behaviour and the dynamics in the immiscible region of a model partially miscible Upper Critical Solution Temperature (UCST) blend was carried out by using a series of nearly monodisperse polydimethylsiloxane (PDMS) of varying molecular weights blended with polyethylmethylsiloxane (PEMS). The complete phase diagram was established through steady shear rheology, optical microscopy and light scattering. The UCST, interfacial tension and morphology of these blends are very sensitive to the molecular weight of the constituents. Partial miscibility was observed only when the Mw of PDMS was sufficiently low. The viscoelastic behaviour in the phase separated region can be modeled successfully using the Palierne model.

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Section: The Effects Of Pdms Molecular Weight On the Morphology And Imentioning

confidence: 51%

Interrelations between Rheology and Phase Behaviour in Partially Miscible Blends: The Case of Polydimethylsiloxane/Polyethylmethylsiloxane (PDMS/PEMS)

et al. 2002

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“…One technique is the ADSA (Axisymmetric Drop Shape Analysis) [38][39][40], which determines the liquid/fluid interfacial tensions from the shape of an axisymmetric menisci due to the gravitational force. This technique for the sessile and pendant drop measurements accomplishes the contact angle and surface tension determination by finding the best fitting of the theoretical drop profile to the real one [41].…”

Section: Surface Tension and Contact Angle Measurementsmentioning

confidence: 99%

Inkjet-Printed Chemical Solution Y2O3 Layers for Planarization of Technical Substrates

Vilardell¹,

Fornell

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et al. 2017

Coatings

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Abstract:The implementation of the Chemical Solution Deposition (CSD) methodology with the Drop on Demand (DoD) inkjet printing (IJP) technology has been successfully employed to develop a Solution Deposition Planarization (SDP) method. We have used nanocrystalline yttrium oxide (Y 2 O 3 ) to decrease the roughness of technical metallic substrates by filling the surface imperfections and thus avoiding costly polishing steps. This alternative process represents an outstanding methodology to reduce the final cost of the second-generation coated conductors manufacturing. Two Y 2 O 3 metalorganic precursor ink formulations were successfully developed and tested to obtain surfaces as smooth as possible with adequate mechanical properties to hold the internal stress developed during the growth of the subsequent layers. By using these inks as precursors for IJP and after a proper tuning of the rheological and wetting parameters, we firstly obtained centimeter length uniform 100 nm-thick SDP-Y 2 O 3 films on unpolished stainless-steel substrate from Bruker HTS. The scalability of the roll to roll (R2R)-IJP process to 100 m is then demonstrated on metallic substrates as well. A complete characterization of the prepared SDP-Y 2 O 3 inkjet-printed layers was carried out using optical microscopy, FIB-SEM (Focus Ion Beam coupled to Scanning Electron Microscopy), XRD (X-ray Diffraction), AFM (Atomic Force Microscopy), reflectometry and nanoindentation techniques. Then, the morphology, thickness, crystallinity and mechanical properties were evaluated, together with the surface roughness in order to assess the resulting layer planarity. The impact of planarity was additionally studied via growth of biaxially textured buffer layers as well as further functional layers. 1.1 µm-thick YSZ layers with in-plane textures better than the stainless steel (SS) polished reference were successfully deposited on top of 100 nm SDP-Y 2 O 3 films yielding 50% of I c in contrast to the standard SS reference.

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“…Anastasiadis et al (5) carried out image digitization and cated by convergence problems owing to ''rough'' drop profiles or inaccurate estimates of the initial parameter values. fitting of the Young-Laplace equation for the drop shape using a personal computer.…”

Section: Prior Studiesmentioning

confidence: 99%

Robust Digital Image Analysis of Pendant Drop Shapes

Thiessen

Chione

McCreary

et al. 1996

Journal of Colloid and Interface Science

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The determination of interfacial tension by video image processing of pendant fluid drops

Cited by 171 publications

References 17 publications

Interrelations between Rheology and Phase Behaviour in Partially Miscible Blends: The Case of Polydimethylsiloxane/Polyethylmethylsiloxane (PDMS/PEMS)

Interrelations between Rheology and Phase Behaviour in Partially Miscible Blends: The Case of Polydimethylsiloxane/Polyethylmethylsiloxane (PDMS/PEMS)

Inkjet-Printed Chemical Solution Y2O3 Layers for Planarization of Technical Substrates

Robust Digital Image Analysis of Pendant Drop Shapes

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