1
|
Pant A, Puthenveettil BA. Unveiling unique scaling behavior in miscible, volatile Marangoni spreading. SOFT MATTER 2024; 20:4395-4401. [PMID: 38764390 DOI: 10.1039/d4sm00175c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2024]
Abstract
We present a novel observation of the expansion of the outer tip radius of a fast-spreading ethanol-water film spreading over a deep substrate of water. The experimentally measured radius of the outer tip of the film (ro) and its velocity (Uo) display a complex scaling with time and drop properties. The variation showed by ro differed from the commonly observed scalings of t3/4 and t1/4. We propose novel scaling laws for ro and Uo by expressing ro as the sum of the radius of the stable part of the film rf and the length of the unstable part lp at the periphery of the stable part of the film, that had azimuthally uniformly spaced plumes. The radius of the stable part of the film scales as rf ∼ t1/4 since, while the film expands, the Marangoni stresses are balanced by viscous stresses within the film thickness. At the same time, lp ∼ t3/4 since the plumes grow at the periphery of the stable part of the film, with the driving surface tension stresses balanced by the viscous stresses in a shear layer below the plumes. Combining these two scaling laws yielded a novel, two-term scaling law for ro, which is close to a single power-law scaling ro ∼ t1/2. We obtain an expression for the dimensionless mean outer tip radius as , where t* = t/tξ, tξ = (rd4ρwμw/Δσ2)1/3 being the time scale. Similarly, we show that the dimensionless velocity scales as with the variables λ1 and λ2 being functions of t* and drop properties. These proposed scaling laws are shown to match our measurements, thereby validating the phenomenology of such miscible, volatile spreading.
Collapse
Affiliation(s)
- Anurag Pant
- Department of Applied Mechanics and Biomedical Engineering, Indian Institute of Technology Madras, Chennai-600036, India.
| | - Baburaj A Puthenveettil
- Department of Applied Mechanics and Biomedical Engineering, Indian Institute of Technology Madras, Chennai-600036, India.
| |
Collapse
|
2
|
Bo X, Zhao H, Valencia A, Liu F, Li W, Daoud WA. Surfactant Self-Assembly Enhances Tribopositivity of Stretchable Ionic Conductors for Wearable Energy Harvesting and Motion Sensing. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024:e2403905. [PMID: 38806154 DOI: 10.1002/adma.202403905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2024] [Revised: 05/23/2024] [Indexed: 05/30/2024]
Abstract
Boosting stretchability and electric output is critical for high-performance wearable triboelectric nanogenerators (TENG). Herein, for the first time, a new approach for tuning the composition of surface functional groups through surfactant self-assembly to improve the tribopositivity, where the assembly increases the transferred charge density and the relative permittivity of water polyurethane (WPU). Incorporating bis(trifluoromethanesulfonyl)imide (TFSI-) and alkali metal ions into a mixture of WPU and the surfactant forms a stretchable film that simultaneously functions as positive tribolayer and electrode, preventing the conventional detachment of tribolayer and electrode in long term usage. Further, the conductivity of the crosslinked film reaches 3.3 × 10-3 mS cm-1 while the elongation at break reaches 362%. Moreover, the surfactant self-assembly impedes the adverse impact of the fluorine-containing groups on tribopositivity. Consequently, the charge density reaches 155 µC m-2, being the highest recorded for WPU and stretchable ionic conductor based TENG. This work introduces a novel approach for boosting the output charge density while avoiding the adverse effect of ionic salts in solid conductors through a universal surfactant self-assembly strategy, which can be extended to other materials. Further, the device is used to monitor and harvest the kinetic energy of human body motion.
Collapse
Affiliation(s)
- Xiangkun Bo
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, China
| | - Hong Zhao
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, China
- School of Materials Science and Hydrogen Energy, Foshan University, Foshan, China
| | - Agnes Valencia
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, China
| | - Fei Liu
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, China
| | - Weilu Li
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, China
| | - Walid A Daoud
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, China
- City University of Hong Kong Shenzhen Research Institute, Shenzhen, China
| |
Collapse
|
3
|
Iasella S, Sharma R, Garoff S, Tilton RD. Interaction of impinging marangoni fields. J Colloid Interface Sci 2024; 653:807-820. [PMID: 37757714 DOI: 10.1016/j.jcis.2023.09.109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 09/09/2023] [Accepted: 09/17/2023] [Indexed: 09/29/2023]
Abstract
HYPOTHESIS Surface tension gradient driven Marangoni flows originating from multiple sources are important to many industrial and medical applications, but the theoretical literature focuses on single surfactant sources. Understanding how two spreading surfactant sources interact allows insights from single source experiments to be applied to multi-source applications. Two key features of multi-source spreading - source translation and source deformation - can be explained by transport modeling of a two-source system. MODELING Numerical simulations of two oleic acid disks placed at varying initial separation distances on a glycerol subphase were performed using COMSOL Multiphysics and compared to spreading of a single surfactant source. FINDINGS Interaction of two spreading sources can be split into three regimes: the independent regime - where each source is unaffected by the other, the interaction regime - where the presence of a second source alters one or more features of the spreading dynamics, and the quasi-one disk regime - where the two sources merge together. The translation of the sources, manifested as increasing separation distance between disk centers of mass, is driven by the flow fields within the subphase and the resultant surface deformation, while deformation of the sources occurs only once the surfactant fronts of the two sources meet.
Collapse
Affiliation(s)
- Steven Iasella
- Department of Chemical Engineering, Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | - Ramankur Sharma
- Department of Chemical Engineering, Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | - Stephen Garoff
- Department of Physics, Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | - Robert D Tilton
- Department of Chemical Engineering, Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA; Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA.
| |
Collapse
|
4
|
Formation and development of distinct deposit patterns by drying Polyelectrolyte-stabilized colloidal droplets at different surfactant concentrations. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
5
|
Huang HJ, Nuthalapati K, Sheng YJ, Tsao HK. Precursor Film of Self-propelled Droplets: Inducing Motion of a Static Droplet. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
6
|
Bickel T, Detcheverry F. Exact solutions for viscous Marangoni spreading. Phys Rev E 2022; 106:045107. [PMID: 36397591 DOI: 10.1103/physreve.106.045107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Accepted: 09/08/2022] [Indexed: 06/16/2023]
Abstract
When surface-active molecules are released at a liquid interface, their spreading dynamics is controlled by Marangoni flows. Though such Marangoni spreading was investigated in different limits, exact solutions remain very few. Here we consider the spreading of an insoluble surfactant along the interface of a deep fluid layer. For two-dimensional Stokes flows, it was recently shown that the nonlinear transport problem can be exactly mapped to a complex Burgers equation [D. Crowdy, SIAM J. Appl. Math. 81, 2526 (2021)]SMJMAP0036-139910.1137/21M1400316. We first present a very simple derivation of this equation. We then provide fully explicit solutions and find that varying the initial surfactant distribution-pulse, hole, or periodic-results in distinct spreading behaviors. By obtaining the fundamental solution, we also discuss the influence of surface diffusion. We identify situations where spreading can be described as an effective diffusion process but observe that this approximation is not generally valid. Finally, the case of a three-dimensional flow with axial symmetry is briefly considered. Our findings should provide reference solutions for Marangoni spreading that may be tested experimentally with fluorescent or photoswitchable surfactants.
Collapse
Affiliation(s)
- Thomas Bickel
- University of Bordeaux, CNRS, Laboratoire Ondes et Matière d'Aquitaine, F-33400 Talence, France
| | - François Detcheverry
- University of Lyon, Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière, F-69622 Villeurbanne, France
| |
Collapse
|
7
|
Hsieh TL, Garoff S, Tilton RD. Marangoni spreading time evolution and synergism in binary surfactant mixtures. J Colloid Interface Sci 2022; 623:685-696. [DOI: 10.1016/j.jcis.2022.05.063] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 05/09/2022] [Accepted: 05/10/2022] [Indexed: 11/30/2022]
|
8
|
Motaghian M, van der Linden E, Habibi M. Surfactant-surfactant interactions govern unusual Marangoni spreading on a soap film. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
9
|
Kulichikhin VG, Malkin AY, Maklakova AA, Semakov AV. Some Dynamic Properties of the Interface. RUSS J GEN CHEM+ 2022. [DOI: 10.1134/s1070363222040090] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
10
|
Sauleda ML, Hsieh TL, Xu W, Tilton RD, Garoff S. Surfactant spreading on a deep subphase: Coupling of Marangoni flow and capillary waves. J Colloid Interface Sci 2022; 614:511-521. [PMID: 35121509 DOI: 10.1016/j.jcis.2022.01.142] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 01/21/2022] [Accepted: 01/22/2022] [Indexed: 02/05/2023]
Abstract
HYPOTHESIS Surfactant-driven Marangoni spreading generates a fluid flow characterized by an outwardly moving "Marangoni ridge". Spreading on thin and/or high viscosity subphases, as most of the prior literature emphasizes, does not allow the formation of capillary waves. On deep, low viscosity subphases, Marangoni stresses may launch capillary waves coupled with the Marangoni ridge, and new dependencies emerge for key spreading characteristics on surfactant thermodynamic and kinetic properties. EXPERIMENTS AND MODELING Computational and physical experiments were performed using a broad range of surfactants to report the post-deposition motion of the surfactant front and the deformation of the subphase surface. Modeling coupled the Navier-Stokes and advective diffusion equations with an adsorption model. Separate experiments employed tracer particles or an optical density method to track surfactant front motion or surface deformation, respectively. FINDINGS Marangoni stresses on thick subphases induce capillary waves, the slowest of which is co-mingled with the Marangoni ridge. Changing Marangoni stresses by varying the surfactant system alters the surfactant front velocity and the amplitude - but not the velocity - of the slowest capillary wave. As spreading progresses, the surfactant front and its associated surface deformation separate from the slowest moving capillary wave.
Collapse
Affiliation(s)
- Madeline L Sauleda
- Department of Physics, Carnegie Mellon University, Pittsburgh, PA 15213, USA; Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | - Tsung-Lin Hsieh
- Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA; Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | - Wangrun Xu
- Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA; Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | - Robert D Tilton
- Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA; Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA; Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA.
| | - Stephen Garoff
- Department of Physics, Carnegie Mellon University, Pittsburgh, PA 15213, USA; Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA.
| |
Collapse
|
11
|
Sauleda ML, Chu HCW, Tilton RD, Garoff S. Surfactant Driven Marangoni Spreading in the Presence of Predeposited Insoluble Surfactant Monolayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:3309-3320. [PMID: 33689367 DOI: 10.1021/acs.langmuir.0c03348] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
When an insoluble surfactant is deposited on the surface of a thin fluid film, stresses induced by surface tension gradients drive Marangoni spreading across the subphase surface. The presence of a predeposited layer of an insoluble surfactant alters that spreading. In this study, the fluid film was aqueous, the predeposited insoluble surfactant was dipalmitoylphosphatidylcholine (DPPC), and the deposited insoluble surfactant was oleic acid. An optical density-based method was used to measure subphase surface distortion, called the Marangoni ridge, associated with propagation of the spreading front. The movement of the Marangoni ridge was correlated with movement of surface tracer particles that indicated both the boundary between the two surfactant layers and the surface fluid velocities. As the deposited oleic acid monolayer spread, it compressed the predeposited DPPC monolayer. During spreading, the surface tension gradient extended into the predeposited monolayer, which was compressed nonuniformly, from the deposited monolayer. The spreading was so rapid that the compressed predeposited surfactant could not have been in quasi-equilibrium states during the spreading. As the initial concentrations of the predeposited surfactant were increased, the shape of the Marangoni ridge deformed. When the initial concentration of the predeposited surfactant reached about 70 A2/molecule, there was no longer a Marangoni ridge but rather a broadly distributed excess of fluid above the initial fluid height. The nonuniform compression of the annulus of the predeposited monolayer also caused tangential motion ahead of both the Marangoni ridge and the boundary between the two monolayers. Spreading ceased when the two monolayers reached the same final surface tension. The final area per molecule of the DPPC monolayer matched that expected from the equilibrium DPPC isotherm at the same final surface tension. Thus, at the end of spreading, there was a simple surface tension balance between the two distinct monolayers.
Collapse
Affiliation(s)
- Madeline L Sauleda
- Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
- Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Henry C W Chu
- Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
- Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
- Department of Chemical Engineering, University of Florida, Gainesville, Florida 32611, United States
| | - Robert D Tilton
- Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
- Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Stephen Garoff
- Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
- Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| |
Collapse
|
12
|
Salzmann BV, van der Sluijs MM, Soligno G, Vanmaekelbergh D. Oriented Attachment: From Natural Crystal Growth to a Materials Engineering Tool. Acc Chem Res 2021; 54:787-797. [PMID: 33502844 PMCID: PMC7893701 DOI: 10.1021/acs.accounts.0c00739] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Indexed: 12/18/2022]
Abstract
ConspectusIntuitively, chemists see crystals grow atom-by-atom or molecule-by-molecule, very much like a mason builds a wall, brick by brick. It is much more difficult to grasp that small crystals can meet each other in a liquid or at an interface, start to align their crystal lattices and then grow together to form one single crystal. In analogy, that looks more like prefab building. Yet, this is what happens in many occasions and can, with reason, be considered as an alternative mechanism of crystal growth. Oriented attachment is the process in which crystalline colloidal particles align their atomic lattices and grow together into a single crystal. Hence, two aligned crystals become one larger crystal by epitaxy of two specific facets, one of each crystal. If we simply consider the system of two crystals, the unifying attachment reduces the surface energy and results in an overall lower (free) energy of the system. Oriented attachment often occurs with massive numbers of crystals dispersed in a liquid phase, a sol or crystal suspension. In that case, oriented attachment lowers the total free energy of the crystal suspension, predominantly by removal of the nanocrystal/liquid interface area. Accordingly, we should start by considering colloidal suspensions with crystals as the dispersed phase, i.e., "sols", and discuss the reasons for their thermodynamic (meta)stability and how this stability can be lowered such that oriented attachment can occur as a spontaneous thermodynamic process. Oriented attachment is a process observed both for charge-stabilized crystals in polar solvents and for ligand capped nanocrystal suspensions in nonpolar solvents. In this last system different facets can develop a very different reactivity for oriented attachment. Due to this facet selectivity, crystalline structures with very specific geometries can be grown in one, two, or three dimensions; controlled oriented attachment suddenly becomes a tool for material scientists to grow architectures that cannot be reached by any other means. We will review the work performed with PbSe and CdSe nanocrystals. The entire process, i.e., the assembly of nanocrystals, atomic alignment, and unification by attachment, is a very complex and intriguing process. Researchers have succeeded in monitoring these different steps with in situ wave scattering methods and real-space (S)TEM studies. At the same time coarse-grained molecular dynamics simulations have been used to further study the forces involved in self-assembly and attachment at an interface. We will briefly come back to some of these results in the last sections of this review.
Collapse
Affiliation(s)
| | | | - Giuseppe Soligno
- Condensed Matter and Interfaces,
Debye Institute for Nanomaterials Science, Utrecht University, P. O. Box 80000, 3508 TA Utrecht, The Netherlands
| | - Daniel Vanmaekelbergh
- Condensed Matter and Interfaces,
Debye Institute for Nanomaterials Science, Utrecht University, P. O. Box 80000, 3508 TA Utrecht, The Netherlands
| |
Collapse
|
13
|
Saxena V, Portale G. Contribution of Ex-Situ and In-Situ X-ray Grazing Incidence Scattering Techniques to the Understanding of Quantum Dot Self-Assembly: A Review. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E2240. [PMID: 33198138 PMCID: PMC7696246 DOI: 10.3390/nano10112240] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 11/04/2020] [Accepted: 11/09/2020] [Indexed: 11/17/2022]
Abstract
Quantum dots are under intense research, given their amazing properties which favor their use in electronics, optoelectronics, energy, medicine and other important applications. For many of these technological applications, quantum dots are used in their ordered self-assembled form, called superlattice. Understanding the mechanism of formation of the superlattices is crucial to designing quantum dots devices with desired properties. Here we review some of the most important findings about the formation of such superlattices that have been derived using grazing incidence scattering techniques (grazing incidence small and wide angle X-ray scattering (GISAXS/GIWAXS)). Acquisition of these structural information is essential to developing some of the most important underlying theories in the field.
Collapse
Affiliation(s)
- Vishesh Saxena
- Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, Groningen AG 9747, The Netherlands;
| | - Giuseppe Portale
- Macromolecular Chemistry and New Polymeric Material, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, Groningen AG 9747, The Netherlands
| |
Collapse
|
14
|
Kolegov K, Barash L. Applying droplets and films in evaporative lithography. Adv Colloid Interface Sci 2020; 285:102271. [PMID: 33010576 DOI: 10.1016/j.cis.2020.102271] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 09/10/2020] [Accepted: 09/11/2020] [Indexed: 01/03/2023]
Abstract
This review covers experimental results of evaporative lithography and analyzes existing mathematical models of this method. Evaporating droplets and films are used in different fields, such as cooling of heated surfaces of electronic devices, diagnostics in health care, creation of transparent conductive coatings on flexible substrates, and surface patterning. A method called evaporative lithography emerged after the connection between the coffee ring effect taking place in drying colloidal droplets and naturally occurring inhomogeneous vapor flux densities from liquid-vapor interfaces was established. Essential control of the colloidal particle deposit patterns is achieved in this method by producing ambient conditions that induce a nonuniform evaporation profile from the colloidal liquid surface. Evaporative lithography is part of a wider field known as "evaporative-induced self-assembly" (EISA). EISA involves methods based on contact line processes, methods employing particle interaction effects, and evaporative lithography. As a rule, evaporative lithography is a flexible and single-stage process with such advantages as simplicity, low price, and the possibility of application to almost any substrate without pretreatment. Since there is no mechanical impact on the template in evaporative lithography, the template integrity is preserved in the process. The method is also useful for creating materials with localized functions, such as slipperiness and self-healing. For these reasons, evaporative lithography attracts increasing attention and has a number of noticeable achievements at present. We also analyze limitations of the approach and ways of its further development.
Collapse
|
15
|
Sharma S, Sinha VR. In vitro and in vivo amelioration of colitis using targeted delivery system of cyclosporine a in New Zealand rabbits. Drug Dev Ind Pharm 2020; 46:1726-1733. [PMID: 32892648 DOI: 10.1080/03639045.2020.1820041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Necessity to develop the efficient targeted delivery of highly potent immunosuppressant for IBD in order to avoid surgical procedure, led to fabrication and evaluation of its anti-inflammatory potential. Previously formulated cyclosporine A (Cyp A) into enteric coated capsules was further evaluated for its site-specificity in the treatment of TNBS induced colitis. Contact angle measurement studies showed excellent spreadability of the developed formulation over the hydrophilic biological tissue substrate. HET-CAM study demonstrates that the formulation prepared is nonirritant to the highly vascular tissues and hence can be used for the immunological sensitive tissues like inflamed intestine in IBD. Further the developed formulation has been characterized for site specificity to distal parts of intestine by pharmacokinetic studies. The appearance of drug in systemic circulation at approximately 5 hours in New Zealand strain of rabbits confirms drug delivery at distal parts of intestine. Significant reduced levels of TNF-α, IL-6 and IL-10 in drug treated animals signifies inhibition of inflammatory reactions at the TNBS treated site. Simultaneously, the change in body weight of same group of animals was observed for 15 days. Results showed a marginal recovery of body weight in Cyp A treated TNBS induced colitis animals. In conclusion, all in vitro and in vivo results confirm the successful site specific delivery and anti-inflammatory efficacy of developed formulation of Cyp A in TNBS induced colitis in New Zealand rabbits.
Collapse
Affiliation(s)
- Sumit Sharma
- University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh, India
| | - Vivek Rajan Sinha
- University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh, India
| |
Collapse
|
16
|
Balazs DM, Dunbar TA, Smilgies DM, Hanrath T. Coupled Dynamics of Colloidal Nanoparticle Spreading and Self-Assembly at a Fluid-Fluid Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:6106-6115. [PMID: 32390432 DOI: 10.1021/acs.langmuir.0c00524] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We investigated the physicochemical and transport phenomena governing the self-assembly of colloidal nanoparticles at the interface of two immiscible fluids. By combining in situ grazing-incidence small-angle X-ray scattering (GISAXS) with a temporal resolution of 200 ms and electron microscopy measurements, we gained new insights into the coupled effects of solvent spreading, nanoparticle assembly, and recession of the vapor-liquid interface on the morphology of the self-assembled thin films. We focus on oleate-passivated PbSe nanoparticles dispersed across an ethylene glycol subphase as a model system and demonstrate how solvent parameters such as surface tension, nanoparticle solubility, aromaticity, and polarity influence the mesoscale morphology of the nanoparticle superlattice. We discovered that a nanoparticle precursor monolayer film spreads in front of the bulk solution and influences the fluid spreading across the subphase. Improved understanding of the impact of kinetic phenomena (i.e., solvent spreading and evaporation) on the superlattice morphology is important to describe the formation mechanism and ultimately enable the assembly of high-quality superlattices with long-range order.
Collapse
Affiliation(s)
- Daniel M Balazs
- Robert F. Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Tyler A Dunbar
- Robert F. Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Detlef-M Smilgies
- Robert F. Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York 14853, United States
- Cornell High Energy Synchrotron Source (CHESS), Cornell University, Ithaca, New York 14853, United States
| | - Tobias Hanrath
- Robert F. Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York 14853, United States
| |
Collapse
|
17
|
Lu J, Liu Z, Wu Z, Liu W, Yang C. Synergistic effects of binary surfactant mixtures in the removal of Cr(VI) from its aqueous solution by foam fractionation. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2019.116346] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
18
|
Motaghian M, Shirsavar R, Erfanifam M, Sabouhi M, van der Linden E, Stone HA, Bonn D, Habibi M. Rapid Spreading of a Droplet on a Thin Soap Film. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:14855-14860. [PMID: 31644302 PMCID: PMC6868707 DOI: 10.1021/acs.langmuir.9b02274] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 10/19/2019] [Indexed: 05/30/2023]
Abstract
We study the spreading of a droplet of surfactant solution on a thin suspended soap film as a function of dynamic surface tension and volume of the droplet. Radial growth of the leading edge (R) shows power-law dependence on time with exponents ranging roughly from 0.1 to 1 for different surface tension differences (Δσ) between the film and the droplet. When the surface tension of the droplet is lower than the surface tension of the film (Δσ > 0), we observe rapid spreading of the droplet with R ≈ tα, where α (0.4 < α < 1) is highly dependent on Δσ. Balance arguments assuming the spreading process is driven by Marangoni stresses versus inertial stresses yield α = 2/3. When the surface tension difference does not favor spreading (Δσ < 0), spreading still occurs but is slow with 0.1 < α < 0.2. This phenomenon could be used for stretching droplets in 2D and modifying thin suspended films.
Collapse
Affiliation(s)
- M. Motaghian
- Physics
and Physical Chemistry of Foods, Wageningen
University, Wageningen 6708 PB, Gelderland, The Netherlands
| | - R. Shirsavar
- Department
of Physics, Faculty of Science, University
of Zanjan, Zanjan 45371-38791, Zanjan, Iran
| | - M. Erfanifam
- Department
of Physics, Faculty of Science, University
of Zanjan, Zanjan 45371-38791, Zanjan, Iran
| | - M. Sabouhi
- Department
of Physics, Faculty of Science, University
of Zanjan, Zanjan 45371-38791, Zanjan, Iran
| | - E. van der Linden
- Physics
and Physical Chemistry of Foods, Wageningen
University, Wageningen 6708 PB, Gelderland, The Netherlands
| | - H. A. Stone
- Department
of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544, United States
| | - D. Bonn
- Institute
of Physics, van der Waals-Zeeman Institute, University of Amsterdam, Science Park 904, Amsterdam 1098 XH, North Holland, The Netherlands
| | - Mehdi Habibi
- Physics
and Physical Chemistry of Foods, Wageningen
University, Wageningen 6708 PB, Gelderland, The Netherlands
| |
Collapse
|
19
|
Papapostolou A, Karasavvas E, Chatzidoukas C. Oxygen mass transfer limitations set the performance boundaries of microbial PHA production processes – A model-based problem investigation supporting scale-up studies. Biochem Eng J 2019. [DOI: 10.1016/j.bej.2019.04.024] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
|
20
|
Iasella SV, Sun N, Zhang X, Corcoran TE, Garoff S, Przybycien TM, Tilton RD. Flow regime transitions and effects on solute transport in surfactant-driven Marangoni flows. J Colloid Interface Sci 2019; 553:136-147. [PMID: 31202050 DOI: 10.1016/j.jcis.2019.06.016] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 06/04/2019] [Accepted: 06/05/2019] [Indexed: 11/29/2022]
Abstract
HYPOTHESIS Surfactant-driven Marangoni flow on liquid films is predicted to depend on subphase depth and initial surface tension difference between the subphase and deposited surfactant solution drop. Changes in flow behavior will impact transport of soluble species entrained in the Marangoni flow along the surface. In extreme cases, the subphase film may rupture, limiting transport. Understanding this behavior is important for applications in drug delivery, coatings, and oil spill remediation. EXPERIMENTS A trans-illumination optical technique measured the subphase height profiles and drop content transport after drop deposition when varying initial subphase depth, surfactant concentration, and subphase viscosity. FINDINGS Three distinct flow regimes were identified depending on the subphase depth and surfactant concentration and mapped onto an operating diagram. These are characterized as a "central depression" bounded by an outwardly traveling ridge, an "annular depression" bounded by a central dome and the traveling ridge, and an "annular dewetting" when the subphase ruptures. Well above the critical micelle concentration, transitions between regimes occur at characteristic ratios of gravitational and initial surface tension gradient stresses; transitions shift when surfactant dilution during spreading weakens the stress before the completion of the spreading event. Drop contents travel with the ridge, but dewetting hinders transport.
Collapse
Affiliation(s)
- Steven V Iasella
- Department of Chemical Engineering, Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, United States(2).
| | - Ningguan Sun
- Department of Chemical Engineering, Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, United States(2)
| | - Xin Zhang
- Department of Chemical Engineering, Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, United States(2)
| | - Timothy E Corcoran
- Pulmonary, Allergy, and Critical Care Division, Department of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, United States(3).
| | - Stephen Garoff
- Department of Physics, Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, United States(2).
| | - Todd M Przybycien
- Department of Chemical Engineering, Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, United States(2); Department of Βiomedical Engineering, Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, United States(2).
| | - Robert D Tilton
- Department of Chemical Engineering, Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, United States(2); Department of Βiomedical Engineering, Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, United States(2).
| |
Collapse
|
21
|
Huang J, Zhu L, Zeng G, Shi L, Shi Y, Yi K, Li X. Recovery of Cd(II) and surfactant in permeate from MEUF by foam fractionation with anionic-nonionic surfactant mixtures. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.03.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
|
22
|
Yokoi N, Georgiev GA. Tear Film-Oriented Diagnosis and Tear Film-Oriented Therapy for Dry Eye Based on Tear Film Dynamics. Invest Ophthalmol Vis Sci 2019; 59:DES13-DES22. [PMID: 30481801 DOI: 10.1167/iovs.17-23700] [Citation(s) in RCA: 71] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
In December 2010 and January 2012, 3% diquafosol sodium ophthalmic solution and 2% rebamipide ophthalmic suspension, respectively, appeared first in Japan as prescription drugs for the treatment of dry eye (DE). Since then, not only the diagnosis and treatment but also the understanding of the pathophysiology of DE have greatly advanced, and a new concept of layer-by-layer diagnosis and treatment for DE, respectively termed "tear-film-oriented diagnosis" (TFOD) and "tear-film-oriented therapy" (TFOT) was born. This new concept is currently in the process of expanding from Japan to other Asian countries. TFOD is the method used for the differential diagnosis of DE, which includes aqueous-deficiency DE (ADDE), decreased wettability DE (DWDE), and increased evaporation DE (IEDE), through the dynamics of tear film (TF) and breakup patterns (BUPs) after the eye is opened. BUPs and/or each diagnosed DE subtype are/is able to distinguish the insufficient components of the ocular surface that are responsible for each BUP in a layer-by-layer fashion. Aqueous fluid, membrane-associated mucins (especially MUC16), and the lipid layer and/or secretory mucins must be insufficient in ADDE, DWDE, and IEDE, respectively, and this allows for a layer-by-layer treatment to be proposed for each BUP via the supplementation of the insufficient components, using the topical therapy currently available. In Japan, TF breakup is regarded as a visible core mechanism for DE, and an abnormal breakup time (i.e., ≤5 seconds) and symptoms are currently used for the diagnosis of DE. Therefore, TFOD and TFOT could be an ideal and practical pathway for clinicians to manage DE.
Collapse
Affiliation(s)
- Norihiko Yokoi
- Department of Ophthalmology, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Georgi As Georgiev
- Department of Optics and Spectroscopy, Faculty of Physics, St. Kliment Ohridski University of Sofia, Sofia, Bulgaria
| |
Collapse
|
23
|
Yokoi N, Georgiev GA. Tear-film-oriented diagnosis for dry eye. Jpn J Ophthalmol 2019; 63:127-136. [PMID: 30783943 DOI: 10.1007/s10384-018-00645-4] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Accepted: 09/28/2018] [Indexed: 01/19/2023]
Abstract
Tear-film (TF) stability protects the ocular surface epithelium from desiccation and is ensured via cooperation between the ocular surface components including constituents of the TF and ocular surface epithelium. Thus, when those components are insufficient or impaired, the TF breakup that initiates dry eye occurs. Recently, new, commercially available eye drops have appeared in Japan that enable TF stabilization via targeted supplementation of deficient ocular surface components. Hence, a new layer-by-layer diagnosis and treatment concept for dry eye, termed tear-film-oriented diagnosis and tear-film-oriented therapy (TFOD and TFOT, respectively), have emerged and become widely accepted in Asian countries and beyond. TFOD is a diagnostic method for dry eye based on the TF dynamics and breakup patterns (BUPs), through which dry-eye subtypes, including aqueous-deficient dry eye, decreased-wettability dry eye, and increased-evaporation dry eye, are diagnosed. BUPs and/or each diagnosed dry-eye subtype can, in a layer-by-layer fashion, reveal the insufficient ocular surface components responsible for the TF breakup. Using these data, the optimal topical TFOT to treat dry eye can be proposed by addressing the TF breakup via the supplementation of the insufficient components. In Japan, TF breakup is now regarded as a visible core mechanism of dry eye, and abnormal breakup time (ie, ≤ 5 seconds) and symptoms are currently considered part of the diagnostic criteria for dry eye. In this review, the importance of TF instability as a core manifestation of dry eye, the molecular mechanism of TF breakup, the concept of TFOD, and the methods for implementing TFOD for TFOT are introduced.
Collapse
Affiliation(s)
- Norihiko Yokoi
- Department of Ophthalmology, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Hirokoji-agaru, Kawaramachi-dori, Kamigyo-ku, Kyoto, 602-0841, Japan.
| | - Georgi As Georgiev
- Department of Optics and Spectroscopy, Faculty of Physics, St. Kliment Ohridski University of Sofia, Sofia, Bulgaria
| |
Collapse
|
24
|
Stetten AZ, Iasella SV, Corcoran TE, Garoff S, Przybycien TM, Tilton RD. Surfactant-induced Marangoni transport of lipids and therapeutics within the lung. Curr Opin Colloid Interface Sci 2018; 36:58-69. [PMID: 30147429 PMCID: PMC6103298 DOI: 10.1016/j.cocis.2018.01.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Understanding the fundamentals of surface transport on thin viscous films has important application in pulmonary drug delivery. The human lung contains a large-area interface between its complex fluid lining and inhaled air. Marangoni flows driven by surface tension gradients along this interface would promote enhanced distribution of inhaled therapeutics by carrying them from where they are deposited in the upper airways, along the fluid interface to deeper regions of the lung. Motivated by the potential to improve therapies for acute and chronic lung diseases, we review recent progress in modeling and experimental studies of Marangoni transport induced by the deposition of surfactant-containing microliter drops and liquid aerosols (picoliter drops) onto a fluid interface. The roles of key system variables are identified, including surfactant solubility, drop miscibility with the subphase, and the thickness, composition and surface properties of the subphase liquid. Of particular interest is the unanticipated but crucial role of aerosol processing to achieve Marangoni transport via phospholipid vesicle dispersions, which are likely candidates for a biocompatible delivery system. Progress in this field has the potential to not only improve outcomes in patients with chronic and acute lung diseases, but also to further our understanding of surface transport in complex systems.
Collapse
Affiliation(s)
- Amy Z. Stetten
- Carnegie Mellon Center for Complex Fluids Engineering, Department of Physics, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | - Steven V. Iasella
- Carnegie Mellon Center for Complex Fluids Engineering, Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | | | - Stephen Garoff
- Carnegie Mellon Center for Complex Fluids Engineering, Department of Physics, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | - Todd M. Przybycien
- Carnegie Mellon Center for Complex Fluids Engineering, Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA
- Carnegie Mellon Center for Complex Fluids Engineering, Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | - Robert D. Tilton
- Carnegie Mellon Center for Complex Fluids Engineering, Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA
- Carnegie Mellon Center for Complex Fluids Engineering, Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| |
Collapse
|
25
|
Mattingly AE, Weaver AA, Dimkovikj A, Shrout JD. Assessing Travel Conditions: Environmental and Host Influences On Bacterial Surface Motility. J Bacteriol 2018; 200:e00014-18. [PMID: 29555698 PMCID: PMC5952383 DOI: 10.1128/jb.00014-18] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
The degree to which surface motile bacteria explore their surroundings is influenced by aspects of their local environment. Accordingly, regulation of surface motility is controlled by numerous chemical, physical, and biological stimuli. Discernment of such regulation due to these multiple cues is a formidable challenge. Additionally inherent ambiguity and variability from the assays used to assess surface motility can be an obstacle to clear delineation of regulated surface motility behavior. Numerous studies have reported single environmental determinants of microbial motility and lifestyle behavior but the translation of these data to understand surface motility and bacterial colonization of human host or environmental surfaces is unclear. Here, we describe the current state of the field and our understanding of exogenous factors that influence bacterial surface motility.
Collapse
Affiliation(s)
- Anne E. Mattingly
- Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, Indiana, USA
| | - Abigail A. Weaver
- Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, Indiana, USA
| | - Aleksandar Dimkovikj
- Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, Indiana, USA
| | - Joshua D. Shrout
- Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, Indiana, USA
- Department of Biological Sciences, University of Notre Dame, Notre Dame, Indiana, USA
| |
Collapse
|
26
|
Stetten AZ, Treece BW, Corcoran TE, Garoff S, Przybycien TM, Tilton RD. Evolution and Disappearance of Solvent Drops on Miscible Polymer Subphases. Colloids Surf A Physicochem Eng Asp 2018; 546:266-275. [PMID: 30416264 DOI: 10.1016/j.colsurfa.2018.03.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Traditionally, an interface is defined as a boundary between immiscible phases. However, previous work has shown that even when two fluids are completely miscible, they maintain a detectable "effective interface" for long times. Miscible interfaces have been studied in various systems of two fluids with a single boundary between them. However, this work has not extended to the three-phase system of a fluid droplet placed on top of a miscible pool. We show that these three-phase systems obey the same wetting conditions as immiscible systems, and that their drop shapes obey the Augmented Young-Laplace Equation. Over time, the miscible interface diffuses and the shape of the drop evolves. We place 2-microliter drops of water atop miscible poly(acrylamide) solutions. The drop is completely wetted by the subphase, and then remains detectable beneath the surface for many minutes. An initial effective interfacial tension can be approximated to be on the order of 0.5 mN/m using the capillary number. Water and poly(acrylamide) are completely miscible in all concentrations, and yet, when viewed from the side, the drop maintains a capillary shape. Study of this behavior is important to the understanding of effective interfaces between miscible polymer phases, which are pervasive in nature.
Collapse
Affiliation(s)
- Amy Z Stetten
- Department of Physics, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | - Bradley W Treece
- Department of Physics, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | - Timothy E Corcoran
- Department of Medicine, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Stephen Garoff
- Department of Physics, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | - Todd M Przybycien
- Department of Physics, Carnegie Mellon University, Pittsburgh, PA 15213, USA.,Department of Medicine, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Robert D Tilton
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA.,Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | | |
Collapse
|
27
|
Classification of Fluorescein Breakup Patterns: A Novel Method of Differential Diagnosis for Dry Eye. Am J Ophthalmol 2017; 180:72-85. [PMID: 28579061 DOI: 10.1016/j.ajo.2017.05.022] [Citation(s) in RCA: 97] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Revised: 05/23/2017] [Accepted: 05/23/2017] [Indexed: 01/25/2023]
Abstract
PURPOSE To investigate the relationship between fluorescein breakup patterns (FBUPs) and clinical manifestations in dry eye cases. DESIGN Cross-sectional study. METHODS In 106 eyes of 106 subjects (19 male, 87 female; mean age: 64.2 years), FBUPs were categorized into 1 of the following 5 break (B) types: area (AB, n = 19); spot (SB, n = 22); line (LB, n = 24); dimple (DB, n = 19); random (RB, n = 22 eyes); and dry eye-related symptoms using the visual analog scale (VAS, 100 mm = maximum), tear meniscus radius (TMR, mm), tear film lipid layer interference grade (IG) (grades 1-5; 1 = best) and spread grade (SG) (grades 1-4; 1 = best), tear film noninvasive breakup time (NIBUT, seconds), fluorescein breakup time (FBUT, seconds), corneal-epithelial damage (CED) score (15 points = maximum), ocular surface epithelial damage (OSED) score (9 points = maximum), and the Schirmer 1 test (ST1, mm) were examined and compared between each FBUP. RESULTS In each FBUP, eye dryness and fatigue were the severest symptoms. Characteristic symptoms were sensitivity to light, heavy eyelids, pain, foreign body sensation, difficulty opening the eye, and discharge for AB, heavy eyelids for SB, and foreign-body sensation for LB. Statistically significant differences were found in TMR (AB-SB, -DB, and -RB; LB-RB), IG (AB-all other FBUP; LB-SB and -DB), and SG (AB-all other FBUPs), FBUT (AB-LB, -DB, and -RB; SB-DB and -RB; LB-RB; DB-RB), and NIBUT (AB-all other FBUPs; SB-DB and-RB, and LB-RB), CED (AB-all other FBUPs; LB-SB, -DB, and -RB) and OSED (AB-SB, -LB, and -DB; LB-SB, -DB, and -RB), and ST1 (AB-SB, -DB, and -LB) (P < .05 in each comparison). CONCLUSIONS The 5 different FBUPs constituted different groups, reflecting different pathophysi-ologies.
Collapse
|
28
|
Semakov AV, Postnov EM, Kulichikhin VG, Malkin AY. Explosive spreading of a concentrated emulsion over a liquid surface. COLLOID JOURNAL 2017. [DOI: 10.1134/s1061933x17030139] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
29
|
Peyre J, Hamraoui A, Faustini M, Humblot V, Baccile N. Surface-induced assembly of sophorolipids. Phys Chem Chem Phys 2017; 19:15227-15238. [DOI: 10.1039/c7cp01339f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The surface self-assembly properties of acidic sophorolipids, a bolaform microbial glycolipid with pH-responsive properties, were studied based on the chemical nature of the support and pH of the solution.
Collapse
Affiliation(s)
- Jessie Peyre
- Sorbonne Universités
- UPMC Univ Paris 06
- CNRS
- Collège de France UMR 7574
- Chimie de la Matière Condensée de Paris
| | - Ahmed Hamraoui
- Sorbonne Universités
- UPMC Univ Paris 06
- CNRS
- Collège de France UMR 7574
- Chimie de la Matière Condensée de Paris
| | - Marco Faustini
- Sorbonne Universités
- UPMC Univ Paris 06
- CNRS
- Collège de France UMR 7574
- Chimie de la Matière Condensée de Paris
| | - Vincent Humblot
- Sorbonne Universités
- UPMC Univ Paris 06
- CNRS
- Laboratoire de Réactivité de Surface
- UMR 7197
| | - Niki Baccile
- Sorbonne Universités
- UPMC Univ Paris 06
- CNRS
- Collège de France UMR 7574
- Chimie de la Matière Condensée de Paris
| |
Collapse
|
30
|
Stetten AZ, Moraca G, Corcoran TE, Tristram-Nagle S, Garoff S, Przybycien TM, Tilton RD. Enabling Marangoni flow at air-liquid interfaces through deposition of aerosolized lipid dispersions. J Colloid Interface Sci 2016; 484:270-278. [PMID: 27623189 DOI: 10.1016/j.jcis.2016.08.076] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Revised: 08/29/2016] [Accepted: 08/30/2016] [Indexed: 11/29/2022]
Abstract
It has long been known that deposited drops of surfactant solution induce Marangoni flows at air-liquid interfaces. These surfactant drops create a surface tension gradient, which causes an outward flow at the fluid interface. We show that aqueous phospholipid dispersions may be used for this same purpose. In aqueous dispersions, phospholipids aggregate into vesicles that are not surface-active; therefore, drops of these dispersions do not initiate Marangoni flow. However, aerosolization of these dispersions disrupts the vesicles, allowing access to the surface-active monomers within. These lipid monomers do have the ability to induce Marangoni flow. We hypothesize that monomers released from broken vesicles adsorb on the surfaces of individual aerosol droplets and then create localized surface tension reduction upon droplet deposition. Deposition of lipid monomers via aerosolization produces surface tensions as low as 1mN/m on water. In addition, aerosolized lipid deposition also drives Marangoni flow on entangled polymer solution subphases with low initial surface tensions (∼34mN/m). The fact that aerosolization of phospholipids naturally found within pulmonary surfactant can drive Marangoni flows on low surface tension liquids suggests that aerosolized lipids may be used to promote uniform pulmonary drug delivery without the need for exogenous spreading agents.
Collapse
Affiliation(s)
- Amy Z Stetten
- Center for Complex Fluids Engineering, Department of Physics, Carnegie Mellon University, Pittsburgh, PA 15213, USA.
| | - Grace Moraca
- Center for Complex Fluids Engineering, Department of Physics, Carnegie Mellon University, Pittsburgh, PA 15213, USA.
| | - Timothy E Corcoran
- Center for Complex Fluids Engineering, Department of Medicine, University of Pittsburgh, Pittsburgh, PA 15260, USA.
| | - Stephanie Tristram-Nagle
- Center for Complex Fluids Engineering, Department of Physics, Carnegie Mellon University, Pittsburgh, PA 15213, USA.
| | - Stephen Garoff
- Center for Complex Fluids Engineering, Department of Physics, Carnegie Mellon University, Pittsburgh, PA 15213, USA.
| | - Todd M Przybycien
- Center for Complex Fluids Engineering, Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA; Center for Complex Fluids Engineering, Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA.
| | - Robert D Tilton
- Center for Complex Fluids Engineering, Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA; Center for Complex Fluids Engineering, Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA.
| |
Collapse
|
31
|
Wang X, Venzmer J, Bonaccurso E. Surfactant-Enhanced Spreading of Sessile Water Drops on Polypropylene Surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:8322-8328. [PMID: 27448154 DOI: 10.1021/acs.langmuir.6b01357] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Spreading of water drops resting in equilibrium on polypropylene surfaces was initiated by dispensing surfactant-laden droplets on their apex. Upon contact of the two drops two processes were kicked-off: surfactant from the droplets spread along the water/air interface of the sessile drops and a train of capillary waves propagated along the sessile drops. The contact line of the sessile drops remained initially pinned and started spreading only when surfactant reached it while the capillary waves did not have an apparent effect on initiating drop spreading. However, surfactant influenced the propagation velocity of the capillary waves. Though the spreading dynamics of such nonhomogeneously mixed surfactant/water drops on polypropylene surfaces was initially different from that of homogeneously mixed drops, the later spreading dynamics was similar and was dominated by viscosity and surface tension in both cases. These results can help in discriminating the path of action of surfactants in bulk and at the water/air interface, which is also relevant for understanding phenomena such as superspreading.
Collapse
Affiliation(s)
- Xiang Wang
- Center of Smart Interfaces, Technical University Darmstadt , 64287 Darmstadt, Germany
- Mechanical Engineering Department, Dongguan University of Technology , 523808, Dongguan, China
| | - Joachim Venzmer
- Evonik Nutrition & Care GmbH , Goldschmidtstrasse 100, 45127 Essen, Germany
| | - Elmar Bonaccurso
- Center of Smart Interfaces, Technical University Darmstadt , 64287 Darmstadt, Germany
| |
Collapse
|
32
|
Sharma R, Corcoran TE, Garoff S, Przybycien TM, Tilton RD. Transport of a partially wetted particle at the liquid/vapor interface under the influence of an externally imposed surfactant generated Marangoni stress. Colloids Surf A Physicochem Eng Asp 2016; 521:49-60. [PMID: 28479673 DOI: 10.1016/j.colsurfa.2016.08.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Marangoni flows offer an interesting and useful means to transport particles at fluid interfaces with potential applications such as dry powder pulmonary drug delivery. In this article, we investigate the transport of partially wetted particles at a liquid/vapor interface under the influence of Marangoni flows driven by gradients in the surface excess concentration of surfactants. We deposit a microliter drop of soluble (sodium dodecyl sulfate aqueous solution) surfactant solution or pure insoluble liquid (oleic acid) surfactant on a water subphase and observe the transport of a pre-deposited particle. Following the previous observation by Wang et al. [1] that a surfactant front rapidly advances ahead of the deposited drop contact line initiates particle motion but then moves beyond the particle, we now characterize the two dominant, time- and position-dependent forces acting on the moving particle: 1) a surface tension force acting on the three-phase contact line around the particle periphery due to the surface tension gradient at the liquid/vapor interface which always accelerates the particle and 2) a viscous force acting on the immersed surface area of the particle which accelerates or decelerates the particle depending on the difference in the velocities of the liquid and particle. We find that the particle velocity evolves over time in two regimes. In the acceleration regime, the net force on the particle acts in the direction of particle motion, and the particle quickly accelerates and reaches a maximum velocity. In the deceleration regime, the net force on the particle reverses and the particle decelerates gradually and stops. We identify the parameters that affect the two forces acting on the particle, including the initial particle position relative to the surfactant drop, particle diameter, particle wettability, subphase thickness, and surfactant solubility. We systematically vary these parameters and probe the spatial and temporal evolution of the two forces acting on the particle as it moves along its trajectory in both regimes. We find that a larger particle always lags behind the smaller particle when placed at an equal initial distance from the drop. Similarly, particles more deeply engulfed in the subphase lag behind those less deeply engulfed. Further, the extent of particle transport is reduced as the subphase thickness decreases, due to the larger velocity gradients in the subphase recirculation flows.
Collapse
Affiliation(s)
- Ramankur Sharma
- Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States.,Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Timothy E Corcoran
- Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Stephen Garoff
- Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States.,Physics Department, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Todd M Przybycien
- Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States.,Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States.,Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Robert D Tilton
- Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States.,Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States.,Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| |
Collapse
|
33
|
Bera B, Duits MHG, Cohen Stuart MA, van den Ende D, Mugele F. Surfactant induced autophobing. SOFT MATTER 2016; 12:4562-4571. [PMID: 27102975 DOI: 10.1039/c6sm00128a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Surfactant adsorption in a three-phase system and its influence on wetting properties are relevant in various applications. Here, we report a hitherto not observed phenomenon, namely the retraction of an aqueous drop on hydrophilic solid substrates (which we refer to as 'autophobing') in ambient oil containing water-insoluble fatty acids, caused by the deposition of these fatty acids from the ambient oil onto the solid substrate. AFM measurements confirm that the surfactant is deposited on the solid by the moving contact line. This leads to a more hydrophobic substrate, the retraction of the contact line and a concomitant increase in the contact angle. The deposition process is enabled by the formation of a reaction product between deprotonated fatty acids and Ca(2+) ions at the oil/water interface. We investigate how the transition to a new equilibrium depends on the concentrations of the fatty acids, the aqueous solute, the chain lengths of the fatty acid, and the types of alkane solvent and silica or mica substrates. This phenomenon is observed on both substrates and for all explored combinations of fatty acids and solvents and thus appears to be generic. In order to capture the evolution of the contact angle, we develop a theoretical model in which the rate of adsorption at the oil-water interface governs the overall kinetics of autophobing, and transfer to the solid is determined by a mass flux balance (similar to a Langmuir Blodgett transfer).
Collapse
Affiliation(s)
- B Bera
- Physics of Complex Fluids (PCF) Group, MESA + Institute of Technology, University of Twente, Enschede, The Netherlands.
| | - M H G Duits
- Physics of Complex Fluids (PCF) Group, MESA + Institute of Technology, University of Twente, Enschede, The Netherlands.
| | - M A Cohen Stuart
- Physics of Complex Fluids (PCF) Group, MESA + Institute of Technology, University of Twente, Enschede, The Netherlands.
| | - D van den Ende
- Physics of Complex Fluids (PCF) Group, MESA + Institute of Technology, University of Twente, Enschede, The Netherlands.
| | - F Mugele
- Physics of Complex Fluids (PCF) Group, MESA + Institute of Technology, University of Twente, Enschede, The Netherlands.
| |
Collapse
|
34
|
Wang X, Bonaccurso E, Venzmer J, Garoff S. Deposition of drops containing surfactants on liquid pools: Movement of the contact line, Marangoni ridge, capillary waves and interfacial particles. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.09.029] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
35
|
Khanal A, Sharma R, Corcoran TE, Garoff S, Przybycien TM, Tilton RD. Surfactant Driven Post-Deposition Spreading of Aerosols on Complex Aqueous Subphases. 1: High Deposition Flux Representative of Aerosol Delivery to Large Airways. J Aerosol Med Pulm Drug Deliv 2015; 28:382-93. [PMID: 25723759 DOI: 10.1089/jamp.2014.1168] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Aerosol drug delivery is a viable option for treating diseased airways, but airway obstructions associated with diseases such as cystic fibrosis cause non-uniform drug distribution and limit efficacy. Marangoni stresses produced by surfactant addition to aerosol formulations may enhance delivery uniformity by post-deposition spreading of medications over the airway surface, improving access to poorly ventilated regions. We examine the roles of different variables affecting the maximum post-deposition spreading of a dye (drug mimic). METHODS Entangled aqueous solutions of either poly(acrylamide) (PA) or porcine gastric mucin (PGM) serve as airway surface liquid (ASL) mimicking subphases for in vitro models of aerosol deposition. Measured aerosol deposition fluxes indicate that the experimental delivery conditions are representative of aerosol delivery to the conducting airways. Post-deposition spreading beyond the locale of direct aerosol deposition is tracked by fluorescence microscopy. Aqueous aerosols formulated with either nonionic surfactant (tyloxapol) or fluorosurfactant (FS-3100) are compared with surfactant-free control aerosols. RESULTS Significant enhancement of post-deposition spreading is observed with surfactant solutions relative to surfactant-free control solutions, provided the surfactant solution surface tension is less than that of the subphase. Amongst the variables considered--surfactant concentration, aerosol flow-rate, total deposited volume, time of delivery, and total deposited surfactant mass--surfactant mass is the primary predictor of maximum spread distance. This dependence is also observed for solutions deposited as a single, microliter-scale drop with a volume comparable to the total volume of deposited aerosol. CONCLUSIONS Marangoni stress-assisted spreading after surfactant-laden aerosol deposition at high fluxes on a complex fluid subphase is capable of driving aerosol contents over significantly greater distances compared to surfactant-free controls. Total delivered surfactant mass is the primary determinant of the extent of spreading, suggesting a great potential to extend the reach of aerosolized medication in partially obstructed airways via a purely physical mechanism.
Collapse
Affiliation(s)
- Amsul Khanal
- 1 Department of Biomedical Engineering, Carnegie Mellon University , Pittsburgh, Pennsylvania.,2 Center for Complex Fluids Engineering, Carnegie Mellon University , Pittsburgh, Pennsylvania
| | - Ramankur Sharma
- 2 Center for Complex Fluids Engineering, Carnegie Mellon University , Pittsburgh, Pennsylvania.,3 Department of Chemical Engineering, Carnegie Mellon University , Pittsburgh, Pennsylvania
| | - Timothy E Corcoran
- 1 Department of Biomedical Engineering, Carnegie Mellon University , Pittsburgh, Pennsylvania.,4 Department of Medicine, University of Pittsburgh , Pittsburgh, Pennsylvania
| | - Stephen Garoff
- 2 Center for Complex Fluids Engineering, Carnegie Mellon University , Pittsburgh, Pennsylvania.,5 Department of Physics, Carnegie Mellon University , Pittsburgh, Pennsylvania
| | - Todd M Przybycien
- 1 Department of Biomedical Engineering, Carnegie Mellon University , Pittsburgh, Pennsylvania.,2 Center for Complex Fluids Engineering, Carnegie Mellon University , Pittsburgh, Pennsylvania.,3 Department of Chemical Engineering, Carnegie Mellon University , Pittsburgh, Pennsylvania
| | - Robert D Tilton
- 1 Department of Biomedical Engineering, Carnegie Mellon University , Pittsburgh, Pennsylvania.,2 Center for Complex Fluids Engineering, Carnegie Mellon University , Pittsburgh, Pennsylvania.,3 Department of Chemical Engineering, Carnegie Mellon University , Pittsburgh, Pennsylvania
| |
Collapse
|
36
|
Nagata S, Yamamoto D, Shioi A. Ion-Selective Oscillatory Wetting under a DC Electric Field. JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 2015. [DOI: 10.1252/jcej.14we126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Shunya Nagata
- Department of Chemical Engineering and Materials Science, Doshisha University
| | - Daigo Yamamoto
- Department of Chemical Engineering and Materials Science, Doshisha University
| | - Akihisa Shioi
- Department of Chemical Engineering and Materials Science, Doshisha University
| |
Collapse
|
37
|
Theodorakis PE, Müller EA, Craster RV, Matar OK. Insights into surfactant-assisted superspreading. Curr Opin Colloid Interface Sci 2014. [DOI: 10.1016/j.cocis.2014.04.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
38
|
The precorneal tear film as a fluid shell: the effect of blinking and saccades on tear film distribution and dynamics. Ocul Surf 2014; 12:252-66. [PMID: 25284771 DOI: 10.1016/j.jtos.2014.01.006] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Revised: 01/05/2014] [Accepted: 01/08/2014] [Indexed: 11/22/2022]
Abstract
We conducted a series of experiments to elucidate the behavior of the human precorneal tear film (PCTF) during blinking and horizontal and vertical saccades. Methodology included video-interferometry with subsequent image cross-correlation (tear film lipid layer [TFLL]) and video-microscopy (mucoaqueous subphase [MAS]). We observed that the TFLL interference pattern deteriorates rapidly with successive blinks and degrades slowly with repeated horizontal saccades during blink suppression when dark arcs of thinning appear in the fluorescein-stained PCTF. Furthermore, after full downgaze and a return to the primary position, a transient horizontal bright band appears, deep to the spreading TFLL. It may be followed by local disturbances in the interference pattern. Two horizontal dark bands form in the stained PCTF after the return saccade. PCTF disruption may occur below the lower band during blink suppression. We concluded that shearing during horizontal saccades is insufficient to disturb the tear film structure greatly. The MAS and TFLL move together as a fluid shell. The dark arcs/bands are caused by meniscus-induced thinning, imprinted onto the PCTF at the lid margin. Their stability during blink suppression suggests that the MAS has gel-like properties. The horizontal bright bands are probably due to transient corneal indentation in downgaze. In downgaze, the disturbance of the TFLL and MAS below the dark bands is possibly due to shearing across the MAS in the return phase. This could cause desiccating stress in everyday activities, such as working at a computer.
Collapse
|
39
|
Antoine C, Pimienta V. Mass-spring model of a self-pulsating drop. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:14935-14946. [PMID: 24200165 DOI: 10.1021/la403678r] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Self-pulsating sessile drops are a striking example of the richness of far-from-equilibrium liquid/liquid systems. The complex dynamics of such systems is still not fully understood, and simple models are required to grasp the mechanisms at stake. In this article, we present a simple mass-spring mechanical model of the highly regular drop pulsations observed in Pimienta, V.; Brost, M.; Kovalchuk, N.; Bresch, S.; Steinbock, O. Complex shapes and dynamics of dissolving drops of dichloromethane. Angew. Chem., Int. Ed. 2011, 50, 10728-10731. We introduce an effective time-dependent spreading coefficient that sums up all of the forces (due to evaporation, solubilization, surfactant transfer, coffee ring effect, solutal and thermal Marangoni flows, drop elasticity, etc.) that pull or push the edge of a dichloromethane liquid lens, and we show how to account for the periodic rim breakup. The model is examined and compared against experimental observations. The spreading parts of the pulsations are very rapid and cannot be explained by a constant positive spreading coefficient or superspreading.
Collapse
Affiliation(s)
- Charles Antoine
- Laboratoire de Physique Théorique de la Matière Condensée, Université Pierre et Marie Curie , 4 place Jussieu, 75005 Paris, France
| | | |
Collapse
|
40
|
Sharma R, Corcoran TE, Garoff S, Przybycien TM, Swanson ER, Tilton RD. Quasi-immiscible spreading of aqueous surfactant solutions on entangled aqueous polymer solution subphases. ACS APPLIED MATERIALS & INTERFACES 2013; 5:5542-5549. [PMID: 23705869 PMCID: PMC3959907 DOI: 10.1021/am400762q] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Motivated by the possibility of enhancing aerosol drug delivery to mucus-obstructed lungs, the spreading of a drop of aqueous surfactant solution on a physically entangled aqueous poly(acrylamide) solution subphase that mimics lung airway surface liquid was investigated. Sodium dodecyl sulfate was used as the surfactant. To visualize spreading of the drop and mimic the inclusion of a drug substance, fluorescein, a hydrophilic and non-surface-active dye, was added to the surfactant solution. The spreading progresses through a series of events. Marangoni stresses initiate the convective spreading of the drop. Simultaneously, surfactant escapes across the drop's contact line within a second of deposition and causes a change in subphase surface tension outside the drop on the order of 1 mN/m. Convective spreading of the drop ends within 2-3 s of drop deposition, when a new interfacial tension balance is achieved. Surfactant escape depletes the drop of surfactant, and the residual drop takes the form of a static lens of nonzero contact angle. On longer time scales, the surfactant dissolves into the subphase. The lens formed by the water in the deposited drop persists for as long as 3 min after the convective spreading process ends due to the long diffusional time scales associated with the underlying entangled polymer solution. The persistence of the lens suggests that the drop phase behaves as if it were immiscible with the subphase during this time period. Whereas surfactant escapes the spreading drop and advances on the subphase/vapor interface, hydrophilic dye molecules in the drop do not escape but remain with the drop throughout the convective spreading. The quasi-immiscible nature of the spreading event suggests that the chemical properties of the surfactant and subphase are much less important than their physical properties, consistent with prior qualitative studies of spreading of different types of surfactants on entangled polymer subphases: the selection of surfactant for pulmonary delivery applications may be limited only by physical and toxicological considerations. Further, the escape of surfactant from individual drops may provide an additional spreading mechanism in the lung, as hydrodynamic and/or surface pressure repulsions may drive individual droplets apart after deposition.
Collapse
Affiliation(s)
- Ramankur Sharma
- Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
- Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Timothy E. Corcoran
- Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Stephen Garoff
- Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
- Physics Department, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Todd M. Przybycien
- Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
- Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Ellen R. Swanson
- Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
- Department of Mathematical Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
- Department of Mathematics, Centre College, Danville, Kentucky 40422, United States
| | - Robert D. Tilton
- Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
- Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| |
Collapse
|
41
|
Ranjbar H, Shahraki BH. Effect of Aqueous Film-Forming Foams on the Evaporation Rate of Hydrocarbon Fuels. Chem Eng Technol 2013. [DOI: 10.1002/ceat.201200401] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
42
|
Sharma R, Kalita R, Swanson ER, Corcoran T, Garoff S, Przybycien T, Tilton RD. Autophobing on liquid subphases driven by the interfacial transport of amphiphilic molecules. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:15212-15221. [PMID: 23039250 PMCID: PMC3523312 DOI: 10.1021/la303639w] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We investigated the phenomenon of incomplete wetting of a high-energy liquid subphase by drops of pure amphiphilic molecules as well as drops of amphiphile solutions that are immiscible with the subphase. We show that amphiphiles escape across the contact line of the drop, move on the subphase/vapor interface, and form a submonolayer or full monolayer external to the drop. If this monolayer is sufficiently dense, then it can reduce the surface tension of the subphase, raise the contact angle of the drop, and prevent the drop from fully wetting the subphase. This phenomenon is called autophobing and has been extensively studied on solid substrates. For the liquid subphase studied here, we measure the surface tensions of the three relevant interfaces before and after the drop is deposited. The measured surface tension external to the drop shows that amphiphiles can move across the contact line and form a monolayer outside of the drop. In some cases, at equilibrium, the monolayer is in a sufficiently packed state to create the nonwetting condition. In other cases, at equilibrium the monolayer density is insufficient to lower the surface tension enough to achieve the nonwetting condition. Unlike on solid substrates where the formation of the monolayer external to the drop is kinetically hindered, the amphiphiles can move rapidly across the liquid subphase by Marangoni-driven surface transport, and local equilibrium is achieved. However, because the amphiphile inventory and subphase area are limited, the achievement of autophobing on a liquid subphase depends not only on the instrinsic subphase/amphiphile interaction but also on the total amphiphile inventory and area of the liquid subphase.
Collapse
Affiliation(s)
- Ramankur Sharma
- Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
- Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Roomi Kalita
- Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
- Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Ellen R. Swanson
- Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
- Department of Mathematical Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
- Department of Mathematics, Centre College, Danville, Kentucky 40422, United States
| | - Timothy Corcoran
- Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Stephen Garoff
- Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
- Physics Department, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Todd Przybycien
- Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
- Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Robert D. Tilton
- Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
- Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| |
Collapse
|
43
|
Majumder M, Rendall CS, Eukel JA, Wang JYL, Behabtu N, Pint CL, Liu TY, Orbaek AW, Mirri F, Nam J, Barron AR, Hauge RH, Schmidt HK, Pasquali M. Overcoming the “Coffee-Stain” Effect by Compositional Marangoni-Flow-Assisted Drop-Drying. J Phys Chem B 2012; 116:6536-42. [DOI: 10.1021/jp3009628] [Citation(s) in RCA: 201] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mainak Majumder
- Nanoscale Science and Engineering
Laboratory (NSEL), Department of Mechanical and Aerospace
Engineering, Monash University, Clayton, Victoria 3800, Australia
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
44
|
Sinz DK, Hanyak M, Darhuber AA. Immiscible surfactant droplets on thin liquid films: Spreading dynamics, subphase expulsion and oscillatory instabilities. J Colloid Interface Sci 2011; 364:519-29. [DOI: 10.1016/j.jcis.2011.08.055] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2011] [Revised: 07/19/2011] [Accepted: 08/21/2011] [Indexed: 12/01/2022]
|
45
|
Oomiya K, Mori D, Ban T, Shioi A. Spontaneous periodic pulsation of contact line in oil/water system – Frequency control with divalent cations and applied voltage. J Colloid Interface Sci 2011; 362:553-9. [DOI: 10.1016/j.jcis.2011.06.075] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2011] [Revised: 06/10/2011] [Accepted: 06/24/2011] [Indexed: 10/18/2022]
|
46
|
Han S, Yu Z, Guo X, Dong X, Chen X, Soll R. Intratracheal instillation of corticosteroids using surfactant as a vehicle for the prevention of chronic lung disease in preterm infants with respiratory distress syndrome. THE COCHRANE DATABASE OF SYSTEMATIC REVIEWS 2011. [DOI: 10.1002/14651858.cd009064] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Shuping Han
- Nanjing Maternal and Child Health Hospital of Nanjing Medical University; Department of Pediatrics, Section of Neonatology; No. 123 Tian Fei Xiang Mo Chou Road Nanjing China 210004
| | - Zhangbin Yu
- Nanjing Maternal and Child Health Hospital of Nanjing Medical University; Department of Pediatrics, Section of Neonatology; No. 123 Tian Fei Xiang Mo Chou Road Nanjing China 210004
| | - Xirong Guo
- Nanjing Maternal and Child Health Hospital of Nanjing Medical University; Department of Pediatrics, Section of Neonatology; No. 123 Tian Fei Xiang Mo Chou Road Nanjing China 210004
| | - Xiaoyue Dong
- Nanjing Maternal and Child Health Hospital of Nanjing Medical University; Department of Pediatrics, Section of Neonatology; No. 123 Tian Fei Xiang Mo Chou Road Nanjing China 210004
| | - Xiaohui Chen
- Nanjing Maternal and Child Health Hospital of Nanjing Medical University; Department of Pediatrics, Section of Neonatology; No. 123 Tian Fei Xiang Mo Chou Road Nanjing China 210004
| | - Roger Soll
- University of Vermont; Division of Neonatal-Perinatal Medicine; Fletcher Allen Health Care, Smith 552A 111 Colchester Avenue Burlington Vermont USA 05401
| |
Collapse
|
47
|
Koch K, Dew B, Corcoran TE, Przybycien TM, Tilton RD, Garoff S. Surface tension gradient driven spreading on aqueous mucin solutions: a possible route to enhanced pulmonary drug delivery. Mol Pharm 2011; 8:387-94. [PMID: 21250745 PMCID: PMC3070836 DOI: 10.1021/mp1002448] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Surface tension gradient driven, or "Marangoni", flow can be used to move exogenous fluid, either surfactant dispersions or drug carrying formulations, through the lung. In this paper, we investigate the spreading of aqueous solutions of water-soluble surfactants over entangled, aqueous mucin solutions that mimic the airway surface liquid of the lung. We measure the movement of the formulation by incorporating dyes into the formulation while we measure surface flows of the mucin solution subphase using tracer particles. Surface tension forces and/or Marangoni stresses initiate a convective spreading flow over this rheologically complex subphase. As expected, when the concentration of surfactant is reduced until its surface tension is above that of the mucin solution, the convective spreading does not occur. The convective spreading front moves ahead of the drop containing the formulation. Convective spreading ends with the solution confined to a well-defined static area which must be governed by a surface tension balance. Further motion of the spread solution progresses by much slower diffusive processes. Spreading behaviors are qualitatively similar for formulations based on anionic, cationic, or nonionic surfactants, containing either hydrophilic or hydrophobic dyes, on mucin as well as on other entangled aqueous polymer solution subphases. This independence of qualitative spreading behaviors from the chemistry of the surfactant and subphase indicates that there is little chemical interaction between the formulation and the subphase during the spreading process. The spreading and final solution distributions are controlled by capillary and hydrodynamic phenomena and not by specific chemical interactions among the components of the system. It is suggested that capillary forces and Marangoni flows driven by soluble surfactants may thereby enhance the uniformity of drug delivery to diseased lungs.
Collapse
Affiliation(s)
- Kevin Koch
- Physics Department, Carnegie Mellon University, Pittsburgh, PA 15213
- Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, PA 15213
| | - Beautia Dew
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213
| | | | - Todd M. Przybycien
- Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, PA 15213
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213
- Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213
| | - Robert D. Tilton
- Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, PA 15213
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213
- Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213
| | - Stephen Garoff
- Physics Department, Carnegie Mellon University, Pittsburgh, PA 15213
- Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, PA 15213
| |
Collapse
|
48
|
Sinz DKN, Hanyak M, Zeegers JCH, Darhuber AA. Insoluble surfactant spreading along thin liquid films confined by chemical surface patterns. Phys Chem Chem Phys 2011; 13:9768-77. [DOI: 10.1039/c0cp02135k] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
49
|
Bernardes JS, Rezende CA, Galembeck F. Morphology and self-arraying of SDS and DTAB dried on mica surface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:7824-7832. [PMID: 20158224 DOI: 10.1021/la9046726] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Dewetting phenomena produce interesting patterns that may impart new properties to solid surfaces. Sodium dodecyl sulfate (SDS) and dodecyltrimethylammonium bromide (DTAB) aqueous solutions, dried on mica surfaces under different drying conditions, undergo dewetting events forming structured deposits that were imaged by scanning electron microscopy (SEM), atomic force (AFM) and Kelvin force microscopy (KFM). Dry SDS, in most situations, displays long branched stripes formed due to fingering instability, while DTAB undergoes stick-slip motion forming patterns of parallel continuous or split stripes. In both systems, independently of drying conditions, surfactants pack forming lamellar structures, but with different orientations: SDS lamellae are aligned parallel to the substrate whereas DTAB lamellae are normal to the mica plane. Electric potential maps of SDS obtained by KFM show well-defined electrostatic patterns: surfactant layers deposited on mica are overall negative with a larger excess of negative charge in the interlamellar space than in the lamellar faces.
Collapse
Affiliation(s)
- Juliana S Bernardes
- Institute of Chemistry, University of Campinas, UNICAMP, P.O. Box 6154, 13084-971, Campinas-SP, Brazil
| | | | | |
Collapse
|
50
|
Beacham DR, Matar OK, Craster RV. Surfactant-enhanced rapid spreading of drops on solid surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:14174-14181. [PMID: 19731944 DOI: 10.1021/la9019469] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We study the surfactant-enhanced spreading of drops on the surfaces of solid substrates. This work is performed in connection with the unique ability of aqueous trisiloxane solutions to wet highly hydrophobic substrates effectively, which has been studied for nearly two decades. We couple a lubrication model to advection-diffusion equations for surfactant transport. We allow for micelle formation and breakup in the bulk and adsorptive flux at both the gas-liquid and liquid-solid interfaces and use appropriate equations of state to model variations in surface tension and wettability. Our numerical results show the effect of basal adsorption, kinetic rates, and the availability of surfactant on the deformation of the droplet and its spreading rate. We demonstrate that this rate is maximized for intermediate rates of basal adsorption and the total mass of surfactant.
Collapse
Affiliation(s)
- D R Beacham
- Department of Chemical Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UK
| | | | | |
Collapse
|