Article
Engineering, Chemical
Nantina Moonprasith, Muhammad Shahrulnizam Nasri, Riza Asmaa Saari, Panitha Phulkerd, Masayuki Yamaguchi
Summary: The addition of a low-viscosity dispersion with high interfacial tension significantly reduces shear viscosity, while viscosity decrease is barely detected when the viscosity of the dispersed phase is similar to the continuous phase. Interfacial tension plays a crucial role in shear viscosity.
POLYMER ENGINEERING AND SCIENCE
(2021)
Article
Mechanics
Karen Y. Perez-Salas, Gabriel Ascanio, Leopoldo Ruiz-Huerta, Juan P. Aguayo
Summary: An analytical approximation for the flow of a linear Phan-Thien-Tanner model fluid through an axisymmetric semi-hyperbolic contraction is presented in this study. The semi-analytical solution proposed can accurately represent the exponential version of the viscoelastic model. The flow model equations for both linear and exponential Phan-Thien-Tanner models are solved with the consideration of Navier boundary conditions to account for slip at the geometry wall.
Article
Materials Science, Characterization & Testing
Younes El Omari, Mohamed Yousfi, Jannick Duchet-Rumeau, Abderrahim Maazouz
Summary: The development of a new high temperature resistant interfacial rheology setup has enabled direct measurement of polymer-polymer interface at temperatures up to 200 degrees C. This allows for exploration of surface/interfacial properties of model fluids with different structures and viscoelastic characteristics, as well as the testing of molten semicrystalline polymer systems for the first time. Additionally, a new lightweight titanium based biconical geometry was designed to enable more sensitive measurement of interfacial rheological properties.
Article
Chemistry, Physical
Talita Coffler Botti, Anthony Hutin, Erick Quintella, Marcio S. Carvalho
Summary: Several studies have investigated the relationship between the rheological properties of oil-water interfaces and the drainage time of a thin oil film between two aqueous drops. The results show that the properties of the structure formed at the oil-water interface are related to the absence of droplet coalescence. At low surfactant concentrations, the interface is weakly elastic and coalescence always occurs. At higher surfactant concentrations, a solid-like film forms at the interface, preventing further coalescence.
Article
Materials Science, Multidisciplinary
Yasser Zare, Kyong Yop Rhee
Summary: The crucial interfacial shear strength plays a crucial role in the strength of nanocomposites filled with halloysite nanotubes. Both network strength and interfacial shear strength directly govern the strength of the nanocomposite, while the crucial interfacial shear strength and the beginning of percolation adversely affect the strengthening effect.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Physics, Fluids & Plasmas
Yuto Hosaka, Shigeyuki Komura, David Andelman
Summary: We discuss the linear hydrodynamic response of a two-dimensional active chiral compressible fluid with odd viscosity, resulting in the odd viscosity-dependent mobility tensor. Furthermore, we demonstrate that a finite-size disk moving laterally in the 2D fluid experiences a nondissipative lift force in addition to the dissipative drag force.
Article
Mechanics
Patrick Wilms, Jan Wieringa, Theo Blijdenstein, Kees van Malssen, Reinhard Kohlus
Summary: The study quantified shear viscosity and wall slip velocity of highly concentrated suspensions, finding that the wall slip velocity scales with the flow index of the liquid phase and shows increasingly large deviations with decreasing solid volume fraction. These deviations are hypothesized to be related to shear-induced migration of solids and macromolecules due to large shear stress and shear rate gradients.
Article
Physics, Multidisciplinary
Parisa Bazazi, Howard A. Stone, S. Hossein Hejazi
Summary: This study experimentally investigates the break-up of a liquid filament with silica nanoparticles in a surfactant-containing oil phase. It is found that when a viscoelastic layer forms at the interface, the pinch-off dynamics follows exponential decay. A simple approach is introduced to estimate the viscoelastic properties of liquid-fluid interfaces and the thickness of the interfacial layer, where direct measurement of interfacial rheology is not possible.
PHYSICAL REVIEW LETTERS
(2023)
Article
Construction & Building Technology
Mervin Ealiyas Mathews, N. Anand, Eva Lubloy, Tattukolla Kiran
Summary: The study evaluated the effect of high temperature on the interfacial shear transfer capacity of Self-Compacting Concrete (SCC) using push-off specimens. The results showed that SCC specimens with Expanded Perlite Aggregate (EPA) content and a thermal protective coating exhibited higher residual compressive strength and shear transfer capacity.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2021)
Article
Materials Science, Composites
Longlong Shi, Guojun Song, Peiyao Li, Xiaoru Li, Duo Pan, Yudong Huang, Lichun Ma, Zhanhu Guo
Summary: This study presents a simple and efficient technique for preparing hyperbranched polyimidazole on carbon fiber surface using isophorone diisocyanate and imidazole, which significantly improves fiber surface properties and enhances the mechanical performances of the carbon fiber/epoxy composite. The in-situ polymerization process is beneficial for enhancing single fiber tensile strength and provides a potential pathway for constructing high-performing composite materials.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Yunus Tansu Aksoy, Lingyue Liu, Mohammad Abboud, Maria Rosaria Vetrano, Erin Koos
Summary: Splashing of liquid droplets onto a substrate is a complex fluid mechanical process, especially when using nanofluids. Even though the addition of nanoparticles to a Newtonian fluid does not change its viscosity, it significantly affects the splashing transition. While splashing is often simplified as a simple material subjected to a complex flow, the impact of nanoparticles complicates the problem. Hence, the study of the rheological properties of nanosuspensions is necessary in understanding this complex phenomenon.
Article
Polymer Science
Zhiqiang Chen, Chenhui Cui, Chenyu Jin, Xiuzhao Li, Yifan Zhou, Yizhe Shao, Li Ma, Yanfeng Zhang, Tiejun Wang
Summary: A reactive blending strategy was proposed to develop a thermoplastic-thermoset blend with enhanced compatibility based on dynamic covalent chemistry. Polybutylene terephthalate (PBT) and polymerized epoxy vitrimer were melt blended and the bond exchange facilitated the grafting of PBT and epoxy vitrimer chains, resulting in improved interfacial compatibility and thermal stability. The obtained blend achieved a balance between the strength and stretchability of PBT and epoxy vitrimer, leading to enhanced toughness.
MACROMOLECULAR RAPID COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Yufei Liu, Yikai Zhan, Min He, Chengjun Xiao, Shan Liu, Shuhao Qin, Jie Yu
Summary: Polyamines with different amino numbers were grafted onto the surface of carbon fiber to improve the interfacial properties and mechanical properties of carbon fiber/polyamide 6 composites.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Physics, Multidisciplinary
Yoko Tomo, Sarthak Nag, Hiroshi Takamatsu
Summary: We observed the instability of a few-nanometer-thick water film encapsulated inside a graphene nanoscroll using transmission electron microscopy. The film formed ripples with a smaller distance than predicted by the classical theory, which can be explained by the van der Waals interactions between the water film and graphene layers. This provides important insights into the behavior of liquid under nanoscale confinement and in nanofluidic systems.
PHYSICAL REVIEW LETTERS
(2022)
Article
Engineering, Multidisciplinary
William A. Pisani, Matthew S. Radue, Sagar Umesh Patil, Gregory M. Odegard
Summary: Flattened carbon nanotubes (flCNTs) show potential as a form of composite material reinforcement with self-assembly and packing efficiency, and computational methods are used to drive their design through efficient polymer selection. The choice of polymer matrix is crucial for the properties at the reinforcement/polymer interface, impacting the overall performance of the composite materials. The predictions suggest that the fluorinated cyanate ester demonstrates the best overall compatibility with flCNTs, showing higher resistance to shearing and peak tension strength compared to other polymer systems.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Mechanics
Chen Liu, Jianzhong Lin, Zhenyu Ouyang
Summary: This study simulated the locomotion state and motion type of elliptical squirmers in a channel flow of power-law fluids. The influence of different parameters on the squirmers was explored, and it was found that coupled structures are prone to break and viscosity significantly affects the flow velocity and motion type of squirmers.
Article
Mechanics
E. E. Herrera-Valencia, M. L. Sanchez-Villavicencio, C. Soriano-Correa, O. Bautista, L. A. Ramirez-Torres, V. J. Hernandez-Abad, F. Calderas
Summary: This study investigated the electroosmotic flow of a viscoelastic fluid in a capillary system. The rheology of the fluid was characterized by a novel generalized exponential model equation, and the effect of charge density on the double-layer field and electrical forces was analyzed. Mathematical models were used to describe the rheological properties and flow performance of the fluid, and experimental data were used to make predictions. The study also examined the influence of applied forces on the structure of the fluid.
Article
Mechanics
Stefano Amadori, Giuseppe Catania
Summary: This article presents a multi-step, iterative technique for locally non-parametric identification of the standard linear solid (SLS) material model using fractional order time differential operators. Test input data consists of a set of identified material complex modulus values estimated at different frequency values obtained from input-output experimental measurements and quasi-static relaxation measurements on the same specimen. The proposed technique is based on an algebraic procedure to solve an overdetermined system of linear equations in order to obtain optimal values for the unknown parameters of the model. The procedure is non-parametric, as the order of the SLS model is initially unknown.
