Measurements of Static and Low Rate Dynamic Contact Angles by Means of an Automated Capillary Rise Technique

Kwok, Daniel Y.; Budziak, C. J.; Neumann, A. W.

doi:10.1006/jcis.1995.1307

Cited by 70 publications

(46 citation statements)

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“…Recently, we have shown [33][34][35][36][37] that measuring contact angles at very slow motion of the three-phase contact line allows direct observation of the surface quality. In addition, when such procedures are interpreted by an automated axisymmetric drop shape analysis-profile (ADSA-P), complexities such as dissolution of the polymer by the liquid and slip/stick contact angles, which affect the contact angle interpretation in terms of surface energetics, can be identified [35][36][37] .…”

Section: Introductionmentioning

confidence: 99%

Low-rate dynamic contact angles on poly[styrene-alt-(hexyl/10-carboxydecyl(90/10)maleimide)] and the determination of solid surface tensions

Kwok

Lam

et al. 1999

Macromol. Chem. Phys.

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SUMMARY: Low-rate dynamic contact angles of 14 liquids on a poly[styrene-alt-(hexyl/10-carboxydecyl(90/10)maleimide)] P[S-(H/CM)] were measured by means of an automated axisymmetric drop shape analysis-profile (ADSA-P). It was found that 9 liquids yield non-constant contact angles, and/or dissolve the polymer. From the experimental contact angles of the remaining 5 liquids, it was found that the product of the liquid-vapour surface tension and the cosine of the contact angle changes smoothly with the liquid-vapour surface tension, i. e. c lv cos h depends only on c lv for a given solid surface (or solid surface tension). This contact angle pattern is in harmony with those from other inert and non-inert (polar and non-polar) surfaces. The solid-vapour surface tension calculated from the equation-of-state approach for solid-liquid interfacial tensions was found to be 31.0 mJ/m 2 , with a 95% confidence limit of l0.6 mJ/m 2 from the experimental contact angles of the 5 liquids in Laboratory 1, and c sv = 29.9 mJ/m 2 from measurements with two liquids in Laboratory 2. The difference is essentially due to actual physical differences between the polymer films prepared in the two laboratories.

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Section: Introductionmentioning

confidence: 99%

Low-rate dynamic contact angles on poly[styrene-alt-(hexyl/10-carboxydecyl(90/10)maleimide)] and the determination of solid surface tensions

Kwok

Lam

et al. 1999

Macromol. Chem. Phys.

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“…Whereas for pure liquids under moderate dynamic conditions, constant g lv , g sl and contact angle values are found, 22,25,26 for completely miscible two-component systems a steady behaviour cannot be expected. 27,28 Despite the known concentration impact on the superspreading effect, 13 a detailed investigation of the dynamic situation at both the solid/liquid and liquid/vapour interfaces has not been carried out for silicon surfactants.…”

Section: Concentration Dependencementioning

confidence: 59%

“…The identity between equilibrium and dynamic interfacial energies for pure liquids is well established. 7,22 For pure water under dynamic conditions the forces at the V2A steel plate (p w s , determination of the liquid/vapour interfacial tension) and the FEP 1 plate (p w a , wetting tension determination) can be expressed by Eqns [9] and [10]. Appl.…”

mentioning

confidence: 99%

Silicon-modified carbohydrate surfactants IX: dynamic wetting of a perfluorinated solid surface by solutions of a siloxane surfactant above and below the critical micelle concentration

Wagner

Richter

et al. 1998

Appl. Organometal. Chem.

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The dynamic wetting behaviour on a perfluorinated, low‐energy solid has been investigated for a carbohydrate‐modified phenylsiloxane surfactant. The surfactant concentration, the rate of interface generation and the [solid/liquid interface area] : [liquid/vapour interface area] ratio were varied systematically. Dynamic data for the liquid/vapour (γlv) and solid/liquid (γsl) interfacial tension as well as their Lifshitz–van der Waals and donor–acceptor contributions were determined under strictly controlled conditions. Since γsl reacts sensitively to variations of the surfactant concentration and the rate of interface generation, the covering of the liquid/non‐polar solid interface is assumed to be a spreading limiting factor. The corresponding γlv values remain constant and close to those obtained under equilibrium conditions. Copyright © 1998 John Wiley & Sons, Ltd.

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“…Technical drawbacks have inhibited researchers from measuring the contact angle inside a rock pore directly. For many years, contact angles have been measured indirectly using methods such as capillary rise or pressure measurements using a capillary tube or thin plate filled with powder or bids of a certain material based on Lucas-Washburn and Young-Laplace equations, capillary pressure curves, USBM (United States Bureau of Mines), or Amott methods [10][11][12][13][14][15][16][17]. These indirect methods only yielded a statistical sense of microscopic behavior of rock or soil samples.…”

Section: Introductionmentioning

confidence: 99%

Direct Measurement of Static and Dynamic Contact Angles Using a Random Micromodel Considering Geological CO2 Sequestration

Jafari

Jung

2017

Sustainability

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Abstract:The pore-level two-phase fluids flow mechanism needs to be understood for geological CO 2 sequestration as a solution to mitigate anthropogenic emission of carbon dioxide. Capillary pressure at the interface of water-CO 2 influences CO 2 injectability, capacity, and safety of the storage system. Wettability usually measured by contact angle is always a major uncertainty source among important parameters affecting capillary pressure. The contact angle is mostly determined on a flat surface as a representative of the rock surface. However, a simple and precise method for determining in situ contact angle at pore-scale is needed to simulate fluids flow in porous media. Recent progresses in X-ray tomography technique has provided a robust way to measure in situ contact angle of rocks. However, slow imaging and complicated image processing make it impossible to measure dynamic contact angle. In the present paper, a series of static and dynamic contact angles as well as contact angles on flat surface were measured inside a micromodel with random pattern of channels under high pressure condition. Our results showed a wide range of pore-scale contact angles, implying complexity of the pore-scale contact angle even in a highly smooth and chemically homogenous glass micromodel. Receding contact angle (RCA) showed more reproducibility compared to advancing contact angle (ACA) and static contact angle (SCA) for repeating tests and during both drainage and imbibition. With decreasing pore size, RCA was increased. The hysteresis of the dynamic contact angle (ACA-RCA) was higher at pressure of one megapascal in comparison with that at eight megapascals. The CO 2 bubble had higher mobility at higher depths due to lower hysteresis which is unfavorable. CO 2 bubbles resting on the flat surface of the micromodel channel showed a wide range of contact angles. They were much higher than reported contact angle values observed with sessile drop or captive bubble tests on a flat plate of glass in previous reports. This implies that more precaution is required when estimating capillary pressure and leakage risk.

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Measurements of Static and Low Rate Dynamic Contact Angles by Means of an Automated Capillary Rise Technique

Cited by 70 publications

References 0 publications

Low-rate dynamic contact angles on poly[styrene-alt-(hexyl/10-carboxydecyl(90/10)maleimide)] and the determination of solid surface tensions

Low-rate dynamic contact angles on poly[styrene-alt-(hexyl/10-carboxydecyl(90/10)maleimide)] and the determination of solid surface tensions

Silicon-modified carbohydrate surfactants IX: dynamic wetting of a perfluorinated solid surface by solutions of a siloxane surfactant above and below the critical micelle concentration

Direct Measurement of Static and Dynamic Contact Angles Using a Random Micromodel Considering Geological CO2 Sequestration

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