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How Do the Valency and Radii of Cations Affect the Rheological Properties of Aqueous Solutions of Zwitterionic and Anionic Surfactant Mixtures?
Langmuir
January 2025
Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, ul. Berdychowo 4, PL 60-965 Poznan, Poland.
Despite extensive research on the use of salts to enhance micellar growth, numerous questions remain regarding the impact of ionic exchange and molecular structure on charge neutralization. This study looks into how certain cations (Na, Ca, and Mg) affect the structure of a cocamidopropyl betaine CAPB and sodium dodecylbenzenesulfonate SDBS surfactant mixture, aiming toward applications in targeted delivery systems. The mixture consists of a zwitterionic surfactant, cocamidopropyl betaine (CAPB), and an anionic surfactant, sodium dodecylbenzenesulfonate (SDBS), combined in varying molar ratios at a total concentration of 200 mM.
View Article and Find Full Text PDFGeometry of obstructed pathway regulates upstream navigational pattern of sperm population.
Lab Chip
January 2025
Department of Food Science and Technology, Cornell University, Ithaca, NY 14853, USA.
Sperm navigation through the complex microarchitecture of the fallopian tube is essential for successful fertilization. Spatiotemporal structural alteration due to folded epithelium or muscle contractions in the fallopian tube changes the geometry of the sperm pathways. The role of structural complexity in sperm navigational patterns has been investigated for single sperm cells but has not been fully addressed at the population level.
View Article and Find Full Text PDFPhysical scaling for predicting shear viscosity and memory effects of lithium-ion battery cathode slurries.
Soft Matter
January 2025
Department of Chemical and Biological Engineering, Northwestern University, Evanston, IL, 60208, USA.
Lithium-ion battery cathodes are manufactured by coating slurries, liquid suspensions that typically include carbon black (CB), active material, and polymer binder. These slurries have a yield stress and complex rheology due to CB's microstructural response to flow. While optimizing the formulation and processing of slurries is critical to manufacturing defect-free and high-performance cathodes, engineering the shear rheology of cathode slurries remains challenging.
View Article and Find Full Text PDFDisplacement MMG-based estimation of dynamic muscle viscoelasticity in the quadriceps during passive pedaling.
Sci Rep
January 2025
Graduate School of Interdisciplinary Science and Engineering of Health Systems, Okayama University, Okayama, 700-0082, Japan.
We explore the correlation between muscle viscoelasticity and displacement mechanomyography (DMMG) during passive joint movement. Current methods for assessing muscle viscoelasticity (which is essential for rehabilitation and sports conditioning) are limited in terms of simplicity, objectivity, and portability. We introduce a novel methodology employing DMMG during passive pedaling to evaluate these properties.
View Article and Find Full Text PDFExperimental study on the simultaneous effect of smart water and clay particles on the stability of asphaltene molecule and emulsion phase.
Sci Rep
January 2025
Department of Petroleum Engineering, Faculty of Chemical Engineering, Tarbiat Modares University, Tehran, Iran.
Enhancing oil recovery in sandstone reservoirs, particularly through smart water flooding, is an appealing area of research that has been thoroughly documented. However, few studies have examined the formation of water-in-heavy oil emulsion because of the incompatibility between the injected water-folded ions, clay particles, and heavy fraction in the oil phase. In this study, we investigated the synergistic roles of asphaltene and clay in the smart water flooding process using a novel experimental approach.
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