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Jacob N. Israelachvili - One of the best experts on this subject based on the ideXlab platform.
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Crude Oil/Brine/Rock Interactions during SmartWater Flooding in Carbonates: Novel Surface Forces Apparatus Measurements at Reservoir Conditions
Day 2 Tue September 01 2020, 2020Co-Authors: Kai Kristiansen, Roberto C. Andresen Eguiluz, Szu-ying Chen, Subhash C. Ayirala, Mohammed B. Alotaibi, Ali A. Yousef, Martin Moskovits, James R. Boles, Jacob N. IsraelachviliAbstract:AbstractIn our previous paper (SPE-190281-MS), we presented results from a suite of multiscale experiments to understand interactions occurring across crude oil/brine/carbonate rock interfaces with different brine compositions. A new atomic to molecular scale mechanism was proposed based on changes in adhesion energies at different length- and time-scales to explain SmartWater effects for improved oil recovery (IOR) in carbonates. It was also understood that SmartWater effect is due to three distinct but interrelated physico-chemical mechanisms, involving changes to the colloidal interaction Forces, Surface roughening due to dissolution and re-precipitation, and removal of pre-adsorbed organic-ionic ad-layers (termed ‘flakes’) from the rock Surface.In the present study, we carried out Surface Forces Apparatus (SFA) experiments to understand SmartWater IOR mechanisms at elevated temperatures and pressures (up to 150°C and 2,200 psi) representative of realistic reservoir conditions. The results of earlier SFA measurements at elevated temperature showed a significant dependence of SmartWater effect on temperature, while the dependence of pressure still remained unexplored. To overcome this major shortcoming and fill the missing gap in existing knowledge, a unique High Pressure-High Temperature Surface Forces Apparatus (HPHT-SFA) has been designed with the same Surface visualization capabilities as regular SFA (nm normally and μm laterally).The calcite thickness and roughness changes measured using the HPHT-SFA at elevated pressures showed a significant difference between SmartWater flooding versus high salinity water (HSW) flooding. During SmartWater flooding, a high rate of removal of organic-ad layer from the aged calcite Surface (manifested by a substantial decrease in the layer thickness) and an unexpected degree of smoothening of calcite (i.e., decrease in the difference between the maximum and minimum thicknesses of calcite) were observed. The change in maximum thickness (i.e., thickness of flakes removed) was found to be around 100 nm, consistent with measurements at atmospheric pressure. The rate of flake removal from carbonate Surface with SmartWater, however, was aggravated at high pressures when compared to that observed at atmospheric conditions. Another set of experiments revealed that under high pressures HSW flooding was not able to remove organic flakes from aged calcite Surface, in contrast to analogous results obtained at ambient pressure. These findings suggest that not only temperature has strong effect governing the restructuring of the calcite Surface, but also the pressure plays an important role affecting the kinetics of organic layer detachment from the calcite Surface.This study presents first ever results obtained from the newly designed HPHT Surface Forces Apparatus to demonstrate the importance of elevated pressures on crude oil/brine/rock interactions in SmartWater flooding. The novel findings obtained at reservoir temperature and pressure conditions are of practical significance to provide a better understanding of SmartWater flooding IOR mechanisms and subsequently guide the optimization of SmartWater flooding processes in carbonate reservoirs.
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A Multi-Modal Miniature Surface Forces Apparatus ($\mu$SFA) for Interfacial Science Measurements
2019Co-Authors: Kai Kristiansen, Stephen H Donaldson, Zachariah J Berkson, Jeffrey Scott, Xavier Banquy, Hilton B De Aguiar, Joshua D Mcgraw, George D Degen, Rongxin Su, Jacob N. IsraelachviliAbstract:Advances in the research of intermolecular and Surface interactions result from the development of new and improved measurement techniques and combinations of existing techniques. Here, we present a new miniature version of the Surface Force Apparatus (the uSFA) that has been designed for ease of use and multi-modal capabilities with retention of the capabilities of other SFA models including accurate measurement of Surface separation distance and physical characterization of dynamic and static physical Forces (i.e., normal, shear, and friction) and interactions (e.g., van der Waals, electrostatic, hydrophobic, steric, biospecific). The small physical size of the uSFA, compared to previous SFA models, makes it portable and suitable for integration into commercially available optical and fluorescence light microscopes, as demonstrated here. The large optical path entry and exit ports make it ideal for concurrent force measurements and spectroscopy studies. Examples of the use of the uSFA in combination with Surface plasmon resonance (SPR) and Raman spectroscopy measurements are presented. Due to the short working distance constraints associated with Raman spectroscopy, an interferometric technique was developed and applied for calculating the inter-Surface separation distance based on Newtons rings. The introduction of the \muSFA will mark a transition in SFA usage from primarily physical characterization to concurrent physical characterization with in situ chemical and biological characterization to study interfacial phenomena, including (but not limited to) molecular adsorption, fluid flow dynamics, determination of Surface species and morphology, and (bio) molecular binding kinetics.
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a multi modal miniature Surface Forces Apparatus usfa for interfacial science measurements
arXiv: Instrumentation and Detectors, 2019Co-Authors: Kai Kristiansen, Stephen H Donaldson, Zachariah J Berkson, Jeffrey Scott, Xavier Banquy, Hilton B De Aguiar, Joshua D Mcgraw, George D Degen, Dong Woog Lee, Jacob N. IsraelachviliAbstract:Advances in the research of intermolecular and Surface interactions result from the development of new and improved measurement techniques and combinations of existing techniques. Here, we present a new miniature version of the Surface Force Apparatus (the uSFA) that has been designed for ease of use and multi-modal capabilities with retention of the capabilities of other SFA models including accurate measurement of Surface separation distance and physical characterization of dynamic and static physical Forces (i.e., normal, shear, and friction) and interactions (e.g., van der Waals, electrostatic, hydrophobic, steric, biospecific). The small physical size of the uSFA, compared to previous SFA models, makes it portable and suitable for integration into commercially available optical and fluorescence light microscopes, as demonstrated here. The large optical path entry and exit ports make it ideal for concurrent force measurements and spectroscopy studies. Examples of the use of the uSFA in combination with Surface plasmon resonance (SPR) and Raman spectroscopy measurements are presented. Due to the short working distance constraints associated with Raman spectroscopy, an interferometric technique was developed and applied for calculating the inter-Surface separation distance based on Newtons rings. The introduction of the \muSFA will mark a transition in SFA usage from primarily physical characterization to concurrent physical characterization with in situ chemical and biological characterization to study interfacial phenomena, including (but not limited to) molecular adsorption, fluid flow dynamics, determination of Surface species and morphology, and (bio) molecular binding kinetics.
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Simultaneous Measurements of Molecular Forces and Electro-Optical Properties of a Confined 5CB Liquid Crystal Film Using a Surface Forces Apparatus
Langmuir : the ACS journal of surfaces and colloids, 2015Co-Authors: Kai Kristiansen, Bruno Zappone, Hongbo Zeng, Jacob N. IsraelachviliAbstract:Using a Surface Forces Apparatus (SFA), we studied the Forces associated with the reorientation of molecules of a common nematic thermotropic liquid crystal, 4'-n-pentyl-4-cyanobiphenyl (5CB), confined between two conducting (silver) Surfaces and its optical behavior under the influence of electric fields with varying magnitudes and field directions. A transient attractive force was observed due to partial reorientations of the liquid crystal molecules and the flow of free ions, in addition to a stronger constant capacitance attraction between the silver Surfaces. At the same time, the optical properties of the liquid crystals were observed perpendicular to the silver Surfaces. Observations of shifts and fluctuations of the extraordinary wave of the (multiple beam) interference fringes measure the refractive index of the director component parallel to the Surface, which is sensitive to tilt motion (or reorientation) of the liquid crystal molecules that provided details of the anisotropic orientations of the molecules and domains. Any lateral differential refractive index change is easily observed by optical microscopy. The optical microscope imaging showed that the changes in the optical properties are due to convective flow at domain boundaries of the liquid crystal molecules (and possible free ions) between the two charged Surfaces. At low electric fields, propagation of domain boundaries was observed, while at higher electric fields, hexagonal patterns of flowing molecules were observed. The interplay of the force measurements and optical observations reveal a complex dynamic behavior of liquid crystals subjected to varying electric fields in confined spaces.
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real time monitoring of aluminum crevice corrosion and its inhibition by vanadates with multiple beam interferometry in a Surface Forces Apparatus
Journal of The Electrochemical Society, 2015Co-Authors: Buddha Ratna Shrestha, Jacob N. Israelachvili, Qingyun Hu, Theodoros Baimpos, Kai Kristiansen, M. ValtinerAbstract:Author(s): Shrestha, BR; Hu, Q; Baimpos, T; Kristiansen, K; Israelachvili, JN; Valtiner, M | Abstract: © The Author(s) 2015. Crevice corrosion (CC) of metals remains a serious concern for structural materials. Yet a real-time in situ visualization of corrosion, and its inhibition within a confined geometry, remains challenging. Here, we present how multiple-beam interferometry in a Surface Forces Apparatus can be utilized to directly visualize corrosion processes in real-time and with Angstrom resolution within welldefined confinement geometries. We use atomically smooth muscovite mica Surfaces to form round-shaped ∼1000 μm2 crevices on aluminum. After exposure to NaCl solutions we can detect and track active sites of aluminum corrosion within this confined geometry. CC of aluminum randomly initiates in the confined crevice mouth, where the distance between apposing Surfaces is between 20-300 nm. We can directly track oxide dissolution/formation, and corrosion-rates as well as their retardation due to sodium vanadate inhibitors present in solution. Formation of a compacted oxide layer effectively inhibits CC in 5 mM NaCl solutions with 2.5 mM of added NaVO3, while inhibition rapidly breaks down at chloride concentrations above 50 mM. Breakdown of the inhibition-layers is initiated by rapid dissolution of the protective oxide within the confined zone. Our technique may be adapted for monitoring CC, corrosion inside of crack-tips, and evaluation of inhibitor efficiencies in a variety of metals.
Kazue Kurihara - One of the best experts on this subject based on the ideXlab platform.
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viscoelasticity of rubber ice interfaces under shear studied using low temperature Surface Forces Apparatus
Tribology Letters, 2019Co-Authors: Sylvain Hemmette, Florian Lecadre, Yuji Kanno, Motohiro Kasuya, Denis Mazuyer, Juliette Cayerbarrioz, Kazue KuriharaAbstract:We performed resonance shear measurement (RSM) based on a low-temperature Surface Forces Apparatus to evaluate the viscoelastic properties of the interfaces between rubber and ice. This method was applied to three kinds of rubbers used for the tire tread, which exhibited different viscoelasticities. These rubbers contained some fillers and exhibited bumps on their Surfaces of which the rms roughness was ca. 120 nm. A rubber studied as a reference was a rubber without fillers, and showed much smoother Surfaces than the other three samples. In the case of the reference rubber, both the elastic (k2) and viscous components (b2) increased with the increasing L; however, the normalized k2 and b2 by the contact area between two Surfaces (A) were constant at the various L’s. This result indicated that the observed increases in k2 and b2 for the reference rubber were only attributed to the increases in A. On the other hand, in the case of the other rubber samples, the normalized k2 and b2 by A decreased with the increasing L at a L 20 mN. This result suggested that characterization of the interfaces of the rough rubber films should be performed at a great enough L in order to avoid the influence of the multiple asperity contact at a lower L. The viscoelastic properties of the interface at a high L were compared with those of the bulk rubbers.
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Viscoelasticity of Rubber–Ice Interfaces Under Shear Studied Using Low-Temperature Surface Forces Apparatus
Tribology Letters, 2019Co-Authors: Sylvain Hemmette, Florian Lecadre, Yuji Kanno, Motohiro Kasuya, Juliette Cayer-barrioz, Denis Mazuyer, Kazue KuriharaAbstract:We performed resonance shear measurement (RSM) based on a low-temperature Surface Forces Apparatus to evaluate the viscoelastic properties of the interfaces between rubber and ice. This method was applied to three kinds of rubbers used for the tire tread, which exhibited different viscoelasticities. These rubbers contained some fillers and exhibited bumps on their Surfaces of which the rms roughness was ca. 120 nm. A rubber studied as a reference was a rubber without fillers, and showed much smoother Surfaces than the other three samples. In the case of the reference rubber, both the elastic ( k _2) and viscous components ( b _2) increased with the increasing L ; however, the normalized k _2 and b _2 by the contact area between two Surfaces ( A ) were constant at the various L ’s. This result indicated that the observed increases in k _2 and b _2 for the reference rubber were only attributed to the increases in A . On the other hand, in the case of the other rubber samples, the normalized k _2 and b_2 by A decreased with the increasing L at a L 20 mN. This result suggested that characterization of the interfaces of the rough rubber films should be performed at a great enough L in order to avoid the influence of the multiple asperity contact at a lower L . The viscoelastic properties of the interface at a high L were compared with those of the bulk rubbers.
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Low-Temperature Surface Forces Apparatus to Determine the Interactions between Ice and Silica Surfaces
Langmuir : the ACS journal of surfaces and colloids, 2018Co-Authors: Florian Lecadre, Yuji Kanno, Motohiro Kasuya, Aya Harano, Kazue KuriharaAbstract:We have developed a low-temperature Surface Forces Apparatus (SFA) using a thermoelectric Peltier module inserted below the bottom Surface of the lower sample holder, giving easy access to the samples and allowing quick temperature changes. In air, the temperature can be decreased to ca. −20 °C. To demonstrate the performance of the Apparatus, we measured the interactions between ice and a silica Surface at −11.5 ± 0.5 °C. An exponentially decaying repulsion of the decay length, 11.2 ± 1.0 nm, was observed, and attributed to the electric double layer (EDL) repulsion. The Surface potential of the ice was calculated to be −35 mV by fitting the data to the EDL model.
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Characterization of Platinum Electrode Surfaces by Electrochemical Surface Forces Measurement
The Journal of Physical Chemistry C, 2017Co-Authors: Sho Fujii, Motohiro Kasuya, Kazue KuriharaAbstract:The Surface Forces between platinum, Pt, electrodes and those between the Pt electrode and mica in aqueous HClO4 were measured at various potentials (E) applied to the electrodes using an electrochemical Surface Forces Apparatus (EC-SFA). This Apparatus uses the twin-path Surface Forces Apparatus, recently developed for opaque samples. The influence of the proton adsorption on the Surface interactions was studied. The Pt electrodes were prepared by the template-stripping procedure using glass templates. The electrode Surfaces were smooth (RMS roughness: 0.26 nm for a 5 μm × 5 μm area) and polycrystalline based on the atomic force microscopy and cyclic voltammetry results, respectively. When the applied potential E was decreased from 0.5 to 0.2 V (vs Ag/AgCl), the electric double layer (EDL) repulsion between the Pt electrodes decreased. The absolute values of the Surface potentials, |ψ0|, calculated using the EDL theory were 58 and 43 mV at E = 0.5 and 0.2 V, respectively. The EDL force at E = 0.2 V was t...
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Characterization of Ferrocene-Modified Electrode Using Electrochemical Surface Forces Apparatus
Langmuir : the ACS journal of surfaces and colloids, 2014Co-Authors: Motohiro Kasuya, Kazue KuriharaAbstract:A electrochemical Surface Forces Apparatus (EC-SFA) was employed to measure the interactions between gold electrodes modified with self-assembled monolayers of ferrocene alkyl thiol (Fc-SAM) and oxidized ferrocene (ferrocenium cation, Fc+-SAM) in a 1 mM aqueous electrolyte. The double-layer repulsion in both cases of the Fc-SAM and Fc+-SAM electrodes was observed. The Surface charge density (σ) evaluated from the double-layer repulsions between the Fc+-SAM electrodes in 1 mM aqueous KClO4 was 0.0027 C/m2, which was 2.5 times greater than that of the Fc-SAM, at 0.0011 C/m2. The σ values of the Fc+-SAM were evaluated for various counteranions using the same method, which were 0.0048, 0.0040, and 0.0104 C/m2 for NO3–, SO42–, and CF3SO3–, respectively. The degrees of dissociation (αd) between the ferrocenium cation and these counteranions were obtained from σ and the density of the ferrocenium on the electrode. The αd value of CF3SO3–, 4.1%, was the highest, followed in the order, SO42– > NO3– > ClO4–, indica...
Hongbo Zeng - One of the best experts on this subject based on the ideXlab platform.
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Probing molecular interaction mechanisms of organic fouling on polyamide membrane using a Surface Forces Apparatus: Implication for wastewater treatment.
The Science of the total environment, 2017Co-Authors: Jun Huang, Yang Liu, Omar Maan, Hongbo ZengAbstract:Surface fouling is the dominant fouling mechanism of thin-film composite (TFC) membranes used in reverse osmosis (RO) technology. Understanding the complex interactions between foulant-membrane which drive the attachment and growth of foulants on membrane Surface is of both fundamental and practical importance. This work aims to understand the molecular interaction mechanisms of organic fouling on RO-TFC membranes. A Surface Forces Apparatus (SFA) was employed to directly measure the interaction Forces and time-dependent adsorption behaviors between model organic foulants: humic acid (HA), bovine serum albumin (BSA), and lipopolysaccharides (LPS) and a polyamide (PA) thin film. PA thin film was prepared by interfacial condensation polymerization on mica substrates using m-phenylenediamine and 1,3,5-benzenetricarbonyltrichloride. The interaction Forces between PA films and different foulant (HA, BSA, LPS) were directly measured under controlled solution chemistries in an asymmetric configuration (foulant-deposited PA films vs. PA films). The adsorption behaviors of these foulants on PA films were directly monitored in a symmetric configuration (PA films vs. PA films). These interactions were examined as a function of both contact time and solution chemistry (ionic strength). In asymmetrical configuration, both HA and BSA show repulsion with PA Surface during approach and adhesion during separation, but LPS demonstrates repulsion only. In symmetrical configuration, all the foulants show adsorption on PA Surface and the initial adsorption rate of foulant to PA Surface follows the order of BSA>LPS>HA. The interaction mechanisms between PA films and foulants were discussed based on the interaction Forces and interaction dynamics measurement.
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Probing Molecular Interactions of Asphaltenes in Heptol Using a Surface Forces Apparatus: Implications on Stability of Water-in-Oil Emulsions
Langmuir : the ACS journal of surfaces and colloids, 2016Co-Authors: Ling Zhang, Chen Shi, Qingxia Liu, Hongbo ZengAbstract:The behaviors and molecular interactions of asphaltenes are related to many challenging issues in oil production. In this study, the molecular interaction mechanism of asphaltenes in Heptol solvents of varying toluene/n-heptane ratio were directly measured using a Surface Forces Apparatus (SFA). The results showed that the interactions between asphaltene Surfaces gradually changed from pure repulsion to weak adhesion as the weight ratio of toluene (ω) in Heptol decreased from ω = 1 to 0. The measured repulsion was mainly due to the steric interactions between swelling asphaltene molecules and/aggregates. The micropipet technique was applied to test the stability of two water-in-oil emulsion droplets attached to glass pipettes. A computer-controlled 4-roll mill fluidic device was also built in-house to investigate the interaction of free-suspending water-in-oil emulsions under dynamic flow conditions. Both micropipet and 4-roll mill fluidic tests demonstrate that asphaltenes adsorbed at oil/water interface...
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Simultaneous Measurements of Molecular Forces and Electro-Optical Properties of a Confined 5CB Liquid Crystal Film Using a Surface Forces Apparatus
Langmuir : the ACS journal of surfaces and colloids, 2015Co-Authors: Kai Kristiansen, Bruno Zappone, Hongbo Zeng, Jacob N. IsraelachviliAbstract:Using a Surface Forces Apparatus (SFA), we studied the Forces associated with the reorientation of molecules of a common nematic thermotropic liquid crystal, 4'-n-pentyl-4-cyanobiphenyl (5CB), confined between two conducting (silver) Surfaces and its optical behavior under the influence of electric fields with varying magnitudes and field directions. A transient attractive force was observed due to partial reorientations of the liquid crystal molecules and the flow of free ions, in addition to a stronger constant capacitance attraction between the silver Surfaces. At the same time, the optical properties of the liquid crystals were observed perpendicular to the silver Surfaces. Observations of shifts and fluctuations of the extraordinary wave of the (multiple beam) interference fringes measure the refractive index of the director component parallel to the Surface, which is sensitive to tilt motion (or reorientation) of the liquid crystal molecules that provided details of the anisotropic orientations of the molecules and domains. Any lateral differential refractive index change is easily observed by optical microscopy. The optical microscope imaging showed that the changes in the optical properties are due to convective flow at domain boundaries of the liquid crystal molecules (and possible free ions) between the two charged Surfaces. At low electric fields, propagation of domain boundaries was observed, while at higher electric fields, hexagonal patterns of flowing molecules were observed. The interplay of the force measurements and optical observations reveal a complex dynamic behavior of liquid crystals subjected to varying electric fields in confined spaces.
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Understanding nanorheology and Surface Forces of confined thin films
Korea-Australia Rheology Journal, 2014Co-Authors: Jun Huang, Ali Faghihnejad, Haolan Xu, Hongbo ZengAbstract:Understanding the nanorheology and associated intermolecular/Surface Forces of fluids in confined geometries or porous media is of both fundamental and practical importance, providing significant insights into various applications such as lubrication and micro/nanoelectromechanical systems. In this work, we briefly reviewed the fundamentals of nanoreheolgy, advances in experimental techniques and theoretical simulation methods, as well as important progress in the nanorheology of confined thin films. The advent of advanced experimental techniques such as Surface Forces Apparatus (SFA), X-ray Surface Forces Apparatus (XSFA) and atomic force microscope (AFM) and computational methods such as molecular dynamics simulations provides powerful tools to study a wide range of rheological phenomena at molecular level and nano scale. One of the most challenging issues unresolved is to elucidate the relationship between the rheological properties and structural evolution of the confined fluid films and particles suspensions. Some of the emerging research areas in the nanorheology field include, but are not limited to, the development of more advanced characterization techniques, design of multifunctional rheological fluids, bio-related nanorheology, and polymer brushes.
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Molecular Interactions of a Polyaromatic Surfactant C5Pe in Aqueous Solutions Studied by a Surface Forces Apparatus
The journal of physical chemistry. B, 2012Co-Authors: Jing Wang, David Harbottle, Johan Sjöblom, Hongbo ZengAbstract:Studies on molecular mechanisms of polyaromatic surfactants in stabilizing water-in-oil (W/O) or oil-in-water (O/W) emulsions are of great scientific and practical importance. A polyaromatic surfactant N-(1-hexylheptyl)-N′-(5-carboxylicpentyl) perylene-3,4,9,10-tetracarboxylic bisimide (C5Pe) with well-defined molecular structure containing fused aromatic rings and heteroatoms similar to asphaltene molecules, was used in this study in an attempt to understand molecular interaction mechanisms of heavy oil components in aqueous solutions. A Surface Forces Apparatus (SFA) was used to directly measure the molecular interactions of C5Pe. Solution pH, salt concentration and Ca2+ addition showed a strong impact on molecular interactions between C5Pe adsorbed on mica Surfaces. The repulsion observed between the two adsorbed C5Pe molecular layers was shown to have a steric and electrosteric origin. The force–distance profiles at short separation distances under high compression force were well fitted with the Alex...
Kai Kristiansen - One of the best experts on this subject based on the ideXlab platform.
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Crude Oil/Brine/Rock Interactions during SmartWater Flooding in Carbonates: Novel Surface Forces Apparatus Measurements at Reservoir Conditions
Day 2 Tue September 01 2020, 2020Co-Authors: Kai Kristiansen, Roberto C. Andresen Eguiluz, Szu-ying Chen, Subhash C. Ayirala, Mohammed B. Alotaibi, Ali A. Yousef, Martin Moskovits, James R. Boles, Jacob N. IsraelachviliAbstract:AbstractIn our previous paper (SPE-190281-MS), we presented results from a suite of multiscale experiments to understand interactions occurring across crude oil/brine/carbonate rock interfaces with different brine compositions. A new atomic to molecular scale mechanism was proposed based on changes in adhesion energies at different length- and time-scales to explain SmartWater effects for improved oil recovery (IOR) in carbonates. It was also understood that SmartWater effect is due to three distinct but interrelated physico-chemical mechanisms, involving changes to the colloidal interaction Forces, Surface roughening due to dissolution and re-precipitation, and removal of pre-adsorbed organic-ionic ad-layers (termed ‘flakes’) from the rock Surface.In the present study, we carried out Surface Forces Apparatus (SFA) experiments to understand SmartWater IOR mechanisms at elevated temperatures and pressures (up to 150°C and 2,200 psi) representative of realistic reservoir conditions. The results of earlier SFA measurements at elevated temperature showed a significant dependence of SmartWater effect on temperature, while the dependence of pressure still remained unexplored. To overcome this major shortcoming and fill the missing gap in existing knowledge, a unique High Pressure-High Temperature Surface Forces Apparatus (HPHT-SFA) has been designed with the same Surface visualization capabilities as regular SFA (nm normally and μm laterally).The calcite thickness and roughness changes measured using the HPHT-SFA at elevated pressures showed a significant difference between SmartWater flooding versus high salinity water (HSW) flooding. During SmartWater flooding, a high rate of removal of organic-ad layer from the aged calcite Surface (manifested by a substantial decrease in the layer thickness) and an unexpected degree of smoothening of calcite (i.e., decrease in the difference between the maximum and minimum thicknesses of calcite) were observed. The change in maximum thickness (i.e., thickness of flakes removed) was found to be around 100 nm, consistent with measurements at atmospheric pressure. The rate of flake removal from carbonate Surface with SmartWater, however, was aggravated at high pressures when compared to that observed at atmospheric conditions. Another set of experiments revealed that under high pressures HSW flooding was not able to remove organic flakes from aged calcite Surface, in contrast to analogous results obtained at ambient pressure. These findings suggest that not only temperature has strong effect governing the restructuring of the calcite Surface, but also the pressure plays an important role affecting the kinetics of organic layer detachment from the calcite Surface.This study presents first ever results obtained from the newly designed HPHT Surface Forces Apparatus to demonstrate the importance of elevated pressures on crude oil/brine/rock interactions in SmartWater flooding. The novel findings obtained at reservoir temperature and pressure conditions are of practical significance to provide a better understanding of SmartWater flooding IOR mechanisms and subsequently guide the optimization of SmartWater flooding processes in carbonate reservoirs.
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multimodal miniature Surface Forces Apparatus μsfa for interfacial science measurements
Langmuir, 2019Co-Authors: Kai Kristiansen, Stephen H Donaldson, Zachariah J Berkson, Jeffrey Scott, Xavier Banquy, Hilton B De Aguiar, Joshua D Mcgraw, Rongxin Su, George D DegenAbstract:Advances in the research of intermolecular and Surface interactions result from the development of new and improved measurement techniques and combinations of existing techniques. Here, we present a new miniature version of the Surface Forces Apparatus—the μSFA—that has been designed for ease of use and multimodal capabilities with the retention of the capabilities of other SFA models including accurate measurements of the Surface separation distance and physical characterization of dynamic and static physical Forces (i.e., normal, shear, and friction) and interactions (e.g., van der Waals, electrostatic, hydrophobic, steric, and biospecific). The small physical size of the μSFA, compared to previous SFA models, makes it portable and suitable for integration into commercially available optical and fluorescence light microscopes, as demonstrated here. The large optical path entry and exit ports make it ideal for concurrent force measurements and spectroscopy studies. Examples of the use of the μSFA in comb...
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Multimodal Miniature Surface Forces Apparatus (μSFA) for Interfacial Science Measurements.
Langmuir : the ACS journal of surfaces and colloids, 2019Co-Authors: Kai Kristiansen, Stephen H Donaldson, Zachariah J Berkson, Jeffrey Scott, Xavier Banquy, Hilton B De Aguiar, Joshua D Mcgraw, Dong Woog Lee, George D DegenAbstract:Advances in the research of intermolecular and Surface interactions result from the development of new and improved measurement techniques and combinations of existing techniques. Here, we present ...
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A Multi-Modal Miniature Surface Forces Apparatus ($\mu$SFA) for Interfacial Science Measurements
2019Co-Authors: Kai Kristiansen, Stephen H Donaldson, Zachariah J Berkson, Jeffrey Scott, Xavier Banquy, Hilton B De Aguiar, Joshua D Mcgraw, George D Degen, Rongxin Su, Jacob N. IsraelachviliAbstract:Advances in the research of intermolecular and Surface interactions result from the development of new and improved measurement techniques and combinations of existing techniques. Here, we present a new miniature version of the Surface Force Apparatus (the uSFA) that has been designed for ease of use and multi-modal capabilities with retention of the capabilities of other SFA models including accurate measurement of Surface separation distance and physical characterization of dynamic and static physical Forces (i.e., normal, shear, and friction) and interactions (e.g., van der Waals, electrostatic, hydrophobic, steric, biospecific). The small physical size of the uSFA, compared to previous SFA models, makes it portable and suitable for integration into commercially available optical and fluorescence light microscopes, as demonstrated here. The large optical path entry and exit ports make it ideal for concurrent force measurements and spectroscopy studies. Examples of the use of the uSFA in combination with Surface plasmon resonance (SPR) and Raman spectroscopy measurements are presented. Due to the short working distance constraints associated with Raman spectroscopy, an interferometric technique was developed and applied for calculating the inter-Surface separation distance based on Newtons rings. The introduction of the \muSFA will mark a transition in SFA usage from primarily physical characterization to concurrent physical characterization with in situ chemical and biological characterization to study interfacial phenomena, including (but not limited to) molecular adsorption, fluid flow dynamics, determination of Surface species and morphology, and (bio) molecular binding kinetics.
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a multi modal miniature Surface Forces Apparatus usfa for interfacial science measurements
arXiv: Instrumentation and Detectors, 2019Co-Authors: Kai Kristiansen, Stephen H Donaldson, Zachariah J Berkson, Jeffrey Scott, Xavier Banquy, Hilton B De Aguiar, Joshua D Mcgraw, George D Degen, Dong Woog Lee, Jacob N. IsraelachviliAbstract:Advances in the research of intermolecular and Surface interactions result from the development of new and improved measurement techniques and combinations of existing techniques. Here, we present a new miniature version of the Surface Force Apparatus (the uSFA) that has been designed for ease of use and multi-modal capabilities with retention of the capabilities of other SFA models including accurate measurement of Surface separation distance and physical characterization of dynamic and static physical Forces (i.e., normal, shear, and friction) and interactions (e.g., van der Waals, electrostatic, hydrophobic, steric, biospecific). The small physical size of the uSFA, compared to previous SFA models, makes it portable and suitable for integration into commercially available optical and fluorescence light microscopes, as demonstrated here. The large optical path entry and exit ports make it ideal for concurrent force measurements and spectroscopy studies. Examples of the use of the uSFA in combination with Surface plasmon resonance (SPR) and Raman spectroscopy measurements are presented. Due to the short working distance constraints associated with Raman spectroscopy, an interferometric technique was developed and applied for calculating the inter-Surface separation distance based on Newtons rings. The introduction of the \muSFA will mark a transition in SFA usage from primarily physical characterization to concurrent physical characterization with in situ chemical and biological characterization to study interfacial phenomena, including (but not limited to) molecular adsorption, fluid flow dynamics, determination of Surface species and morphology, and (bio) molecular binding kinetics.
Xavier Banquy - One of the best experts on this subject based on the ideXlab platform.
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Multimodal Miniature Surface Forces Apparatus (μSFA) for Interfacial Science Measurements.
Langmuir : the ACS journal of surfaces and colloids, 2019Co-Authors: Kai Kristiansen, Stephen H Donaldson, Zachariah J Berkson, Jeffrey Scott, Xavier Banquy, Hilton B De Aguiar, Joshua D Mcgraw, Dong Woog Lee, George D DegenAbstract:Advances in the research of intermolecular and Surface interactions result from the development of new and improved measurement techniques and combinations of existing techniques. Here, we present ...
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multimodal miniature Surface Forces Apparatus μsfa for interfacial science measurements
Langmuir, 2019Co-Authors: Kai Kristiansen, Stephen H Donaldson, Zachariah J Berkson, Jeffrey Scott, Xavier Banquy, Hilton B De Aguiar, Joshua D Mcgraw, Rongxin Su, George D DegenAbstract:Advances in the research of intermolecular and Surface interactions result from the development of new and improved measurement techniques and combinations of existing techniques. Here, we present a new miniature version of the Surface Forces Apparatus—the μSFA—that has been designed for ease of use and multimodal capabilities with the retention of the capabilities of other SFA models including accurate measurements of the Surface separation distance and physical characterization of dynamic and static physical Forces (i.e., normal, shear, and friction) and interactions (e.g., van der Waals, electrostatic, hydrophobic, steric, and biospecific). The small physical size of the μSFA, compared to previous SFA models, makes it portable and suitable for integration into commercially available optical and fluorescence light microscopes, as demonstrated here. The large optical path entry and exit ports make it ideal for concurrent force measurements and spectroscopy studies. Examples of the use of the μSFA in comb...
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A Multi-Modal Miniature Surface Forces Apparatus ($\mu$SFA) for Interfacial Science Measurements
2019Co-Authors: Kai Kristiansen, Stephen H Donaldson, Zachariah J Berkson, Jeffrey Scott, Xavier Banquy, Hilton B De Aguiar, Joshua D Mcgraw, George D Degen, Rongxin Su, Jacob N. IsraelachviliAbstract:Advances in the research of intermolecular and Surface interactions result from the development of new and improved measurement techniques and combinations of existing techniques. Here, we present a new miniature version of the Surface Force Apparatus (the uSFA) that has been designed for ease of use and multi-modal capabilities with retention of the capabilities of other SFA models including accurate measurement of Surface separation distance and physical characterization of dynamic and static physical Forces (i.e., normal, shear, and friction) and interactions (e.g., van der Waals, electrostatic, hydrophobic, steric, biospecific). The small physical size of the uSFA, compared to previous SFA models, makes it portable and suitable for integration into commercially available optical and fluorescence light microscopes, as demonstrated here. The large optical path entry and exit ports make it ideal for concurrent force measurements and spectroscopy studies. Examples of the use of the uSFA in combination with Surface plasmon resonance (SPR) and Raman spectroscopy measurements are presented. Due to the short working distance constraints associated with Raman spectroscopy, an interferometric technique was developed and applied for calculating the inter-Surface separation distance based on Newtons rings. The introduction of the \muSFA will mark a transition in SFA usage from primarily physical characterization to concurrent physical characterization with in situ chemical and biological characterization to study interfacial phenomena, including (but not limited to) molecular adsorption, fluid flow dynamics, determination of Surface species and morphology, and (bio) molecular binding kinetics.
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a multi modal miniature Surface Forces Apparatus usfa for interfacial science measurements
arXiv: Instrumentation and Detectors, 2019Co-Authors: Kai Kristiansen, Stephen H Donaldson, Zachariah J Berkson, Jeffrey Scott, Xavier Banquy, Hilton B De Aguiar, Joshua D Mcgraw, George D Degen, Dong Woog Lee, Jacob N. IsraelachviliAbstract:Advances in the research of intermolecular and Surface interactions result from the development of new and improved measurement techniques and combinations of existing techniques. Here, we present a new miniature version of the Surface Force Apparatus (the uSFA) that has been designed for ease of use and multi-modal capabilities with retention of the capabilities of other SFA models including accurate measurement of Surface separation distance and physical characterization of dynamic and static physical Forces (i.e., normal, shear, and friction) and interactions (e.g., van der Waals, electrostatic, hydrophobic, steric, biospecific). The small physical size of the uSFA, compared to previous SFA models, makes it portable and suitable for integration into commercially available optical and fluorescence light microscopes, as demonstrated here. The large optical path entry and exit ports make it ideal for concurrent force measurements and spectroscopy studies. Examples of the use of the uSFA in combination with Surface plasmon resonance (SPR) and Raman spectroscopy measurements are presented. Due to the short working distance constraints associated with Raman spectroscopy, an interferometric technique was developed and applied for calculating the inter-Surface separation distance based on Newtons rings. The introduction of the \muSFA will mark a transition in SFA usage from primarily physical characterization to concurrent physical characterization with in situ chemical and biological characterization to study interfacial phenomena, including (but not limited to) molecular adsorption, fluid flow dynamics, determination of Surface species and morphology, and (bio) molecular binding kinetics.
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dynamics of force generation by confined actin filaments
Soft Matter, 2013Co-Authors: Xavier Banquy, Bruno Zappone, Wren G Greene, Anatoly B Kolomeisky, Jacob N. IsraelachviliAbstract:Forces generated by polymerizing/de-polymerizing actin filaments confined between two mica Surfaces were measured using the Surface Forces Apparatus. The measurements show that confined actin filaments exhibit complex force-generation dynamics involving multiple “modes”, the predominance of which is determined by the confinement gap and the applied force (confining pressure).
