Article
Polymer Science
Sebastien Roland, Guillaume Miquelard-Garnier, Andrey V. Shibaev, Anna L. Aleshina, Alexis Chenneviere, Olga Matsarskaia, Cyrille Sollogoub, Olga E. Philippova, Ilias Iliopoulos
Summary: Dual transient networks were prepared by mixing highly charged long wormlike micelles of surfactants with polysaccharide chains of hydroxypropyl guar above the entanglement concentration for each of the components. The system exhibited macroscopic homogeneity over a wide range of polymer and surfactant concentrations, but microphase separation was observed with the formation of polymer-rich and surfactant-rich domains.
Article
Chemistry, Physical
Calum S. G. Butler, Veena T. Kelleppan-Meaney, Ashley P. Williams, Luke W. Giles, Mark Louis P. Vidallon, Anna Sokolova, Liliana de Campo, Kellie L. Tuck, Rico F. Tabor
Summary: This study investigates the effect of amide functionality on surfactant properties. The presence of an amidopropyl linker was found to have little effect on the aggregation propensity and morphology of the surfactants, but increased their Krafft temperature. Furthermore, the addition of sodium salts with specific counterions was shown to influence the aggregate morphology of the surfactants.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Chemistry, Physical
Shuo Lu, Jinfeng Dong, Xuefeng Li
Summary: Ultra-long tailed zwitterionic surfactants can form aqueous wormlike elastic micelles, while shorter ones mainly exhibit spherical viscous micelles. Anionic surfactants are widely used to regulate the micellar morphology from spherical to wormlike. Systematic investigations on the molecular level are insightful for understanding the regulative mechanism of viscoelasticity. The experiment results show that sodium alkylsulfate (SAS) promotes the formation of SAS/DHSB hybrid wormlike micelles.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
V. S. Molchanov, A. Kuklin, A. S. Orekhov, N. A. Arkharova, O. E. Philippova
Summary: Rheometry, small-angle neutron scattering, and cryo-transmission electron microscopy were used to investigate the structure and properties of mixed wormlike micelles (WLMs) of zwitterionic and anionic surfactants. The study found that the transition of linear micelles into branched micelles at increasing surfactant concentration leads to a drop in viscosity and approaches the system to the behavior of Maxwell fluid with a single relaxation time, which strongly affects the rheological properties and can be exploited in various applications of zwitterionic surfactants.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Multidisciplinary
Trang Vu, Geoffrey Reynolds, Howard D. Hutton, Gerald B. Kasting, Peter Koenig
Summary: The study investigated the effect of nonionic cosurfactants on thickening mechanism in a mixture of an amino acid-based surfactant and a zwitterionic cosurfactant, revealing that nonionic cosurfactants can significantly increase viscosity and alter the pH at which viscosity maximum occurs.
Article
Chemistry, Physical
Calum S. G. Butler, Joshua P. King, Luke W. Giles, Joshua B. Marlow, Mark Louis P. Vidallon, Anna Sokolova, Liliana de Campo, Kellie L. Tuck, Rico F. Tabor
Summary: The morphology of surfactant self-assemblies is controlled by intermolecular interactions and packing constraints. Rational design of surfactant structure can target specific self-assembly modes, such as wormlike micelles. A novel azobenzene-containing surfactant was synthesized to produce photo-responsive wormlike micelles, showing changes in structure and diffusivity upon UV-irradiation.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Physical
Dongmei Lv, Qi Liu, Chenyong Wang, Huijun Wu, Na Zhao, Baolin Yin, Xilian Wei, Jing Li
Summary: This study presents a novel dual-stimuli triggered wormlike micellar solution prepared by mixing cationic surfactants and sodium hydrogen phthalate. The solution can switch between a water-like state and a gel-like state by adjusting the pH and temperature. The change in flowing behavior is attributed to the microstructural transition between different micellar structures.
Article
Chemistry, Physical
Taraknath Mandal
Summary: In this study, the effects of the molecular structure of additives on the morphology and scission energy of charged micelles were investigated using coarse-grained molecular dynamics simulations. It was found that the hydrophobic part of the additives played a significant role in determining the scission energy and topology of the micelles.
Article
Chemistry, Multidisciplinary
Emad Jafari Nodoushan, Young Ju Lee, Hae-Joong Na, Byoung-Hee You, Moo-Yeon Lee, Namwon Kim
Summary: The addition of NaCl reduces the viscosity of wormlike micellar solutions, leading to the formation of branch points that result in shorter relaxation times and lower zero-shear viscosity.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Chemistry, Physical
Yu-Ting Lin, Shuhao Liu, Bhargavi Bhat, Kai-Yuan Kuan, Wentao Zhou, Ignacio Jose Cobos, Joseph Sang-Il Kwon, Mustafa E. S. Akbulut
Summary: pH and temperature-responsive binary supramolecular assembly with highly tunable viscous and viscoelastic properties was reported in this study. The system demonstrated high control over its viscosity and undergoes transitions between non-Maxwellian and Maxwellian fluid behavior. Cryo-TEM studies showed that the morphological transformation of the assembly was responsible for the switchable rheological properties.
Article
Chemistry, Physical
Ricky F. Lopez-Santiago, Jorge Delgado, Rolando Castillo
Summary: This study investigates the influence of elastic forces on the rheological behavior of wormlike micellar solutions through various experimental methods. The findings highlight the significance of the entanglement index in understanding the origin of elastic forces.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Polymer Science
Alexander L. Kwiatkowski, Vyacheslav S. Molchanov, Yuri M. Chesnokov, Oleksandr I. Ivankov, Olga E. Philippova
Summary: This study investigates the impact of a hydrocarbon on the rheological properties and shapes of hybrid wormlike micelles, revealing their potential use as thickeners and drag-reducing agents in hydraulic fracturing and oil transportation.
Article
Chemistry, Physical
Duccio Tatini, Martina Raudino, Moira Ambrosi, Emiliano Carretti, Irina Davidovich, Yeshayahu Talmon, Barry W. Ninham, Pierandrea Lo Nostro
Summary: This study investigated the structural, thermal, and rheological properties of a moderately concentrated (13% w/w) dispersion of sodium oleate in water for the first time. The results showed significant deviations in the phase and rheology behavior of the surfactant at this concentration, with the addition of small amounts of KCl causing a transition from elongated wormlike micelles to a gel-like viscous material. These viscoelastic aqueous dispersions of NaOL are considered excellent candidates for stimuli-responsive green materials, with their behavior depending on the presence of cosolutes such as KCl.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Physical
Alexander S. Ospennikov, Alexey A. Gavrilov, Oleksandr P. Artykulnyi, Alexander Kuklin, Valentin V. Novikov, Andrey Shibaev, Olga E. Philippova
Summary: The study investigated the impact of a water-soluble monomer on the structure and rheological properties of wormlike surfactant micelles, revealing different effects at varying salt contents.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Physical
K. B. Shishkhanova, V. S. Molchanov, A. N. Baranov, E. P. Kharitonova, A. S. Orekhov, N. A. Arkharova, O. E. Philippova
Summary: Soft viscoelastic nanocomposites were prepared by incorporating aluminosilicate clay halloysite nanotubes into the network of entangled linear wormlike micelles. The nanotubes were shown to increase the viscosity by attaching to the micellar endcaps. Cryo-TEM visualization confirmed the junctions between the micelles and the nanotubes. The nanocomposites exhibited peculiar flow curves with two shear thinning regions and a plateau, and their viscosity was pH responsive, increasing by 30 times with increasing pH from 4 to 9 due to the interaction between the nanotubes and oppositely charged micelles.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Engineering, Biomedical
Yu-Heng Deng, Tomas Ricciardulli, Jungeun Won, Matthew A. Wade, Simon A. Rogers, Stephen A. Boppart, David W. Flaherty, Hyunjoon Kong
Summary: The SLAM microrobot swarm can penetrate, fracture, and detach biofilm, nullifying bacterial resistance to antibiotics and enhancing killing efficacy.
Article
Chemistry, Applied
Merve Yildirim Erturk, Simon A. Rogers, Jozef Kokini
Summary: The large amplitude oscillatory shear responses of doughs were studied using the Fourier Transform coupled with Chebyshev Polynomials (FTC) and Sequence of Physical Processes (SPP) methods. FTC provides user-friendly measures, while SPP gives a detailed history of deformation and microstructural changes.
FOOD HYDROCOLLOIDS
(2022)
Article
Chemistry, Physical
Christopher A. P. Neal, Valeria Leon, Michelle C. Quan, Nondumiso O. Chibambo, Michelle A. Calabrese
Summary: The shape and quantity of hydrophilic silica nanoparticles are found to affect the microstructure, rheology, and stability of phase-separating polymer solutions. By studying the interactions between nanoparticles, polymer, and water, researchers have discovered that nanoparticle shape and concentration can lower the onset of phase separation transitions in aqueous polymer solutions. This finding provides insights into fine-tuning the transition temperatures and mechanical properties of stimuli-responsive materials.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Applied
Christopher A. P. Neal, Grace Kresge, Michelle C. Quan, Valeria Leon, Nondumiso O. Chibambo, Michelle A. Calabrese
Summary: Although the impact of magnetic fields on phase transitions in thermoresponsive polymer solutions is not well-understood, combining magnetic fields with nanoparticle incorporation provides a novel route for tuning material properties. The mechanism by which magnetic fields and nanoparticle addition alter the thermodynamic and optical properties of poly(N-isopropyl acrylamide) (PNIPAM) solutions is distinct, but their combination results in field-dependent rheological behavior that is unseen in polymer-only solutions.
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
(2023)
Article
Mechanics
Krutarth M. Kamani, Gavin J. Donley, Rekha Rao, Anne M. Grillet, Christine Roberts, Abhishek Shetty, Simon A. Rogers
Summary: A comprehensive understanding of the sequence of processes exhibited by yield stress fluids under large amplitude oscillatory shearing is achieved through multiple experimental and analytical approaches. A novel component rate Lissajous curve is introduced and proven to be useful for analyzing the responses of viscoelastic models. The behaviors of yielding and unyielding are investigated by comparing experimental results with predictions from different models. These methods, including the component rates, the sequence of physical processes analysis, and the time-resolved Pipkin diagrams, consistently identify the same material physics, revealing that yield stress fluids undergo a sequence of physical processes.
JOURNAL OF RHEOLOGY
(2023)
Article
Mechanics
Yul Hui Shim, Simon A. Rogers
Summary: Graphene oxide (GO) has gained attention for its unique properties and applications in materials science and engineering, including DIW printing of three-dimensional structures. Understanding the yielding behavior of GO colloids is important for developing efficient and effective printing inks. In this study, the yielding behavior of GO colloids was investigated through oscillatory rheology, and the recoverable and unrecoverable responses were analyzed to determine the storage and dissipation of energies. This study contributes to the understanding of out-of-equilibrium rheological physics and provides guidelines for energy efficiency in soft material printing.
Article
Multidisciplinary Sciences
Gavin J. Donley, Suresh Narayanan, Matthew A. Wade, Jun Dong Park, Robert L. Leheny, James L. Harden, Simon A. Rogers
Summary: We investigate the microstructural yielding dynamics of concentrated colloidal systems through creep/recovery tests coupled with X-ray Photon Correlation Spectroscopy (XPCS). The results reveal that the microstructural dynamics are closely related to the applied creep stresses, with small stresses leading to nearly complete recovery, while larger stresses accelerating the dynamics. The study also demonstrates that the yielding transition in these systems exhibits high heterogeneity on the microstructural level.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Review
Physics, Applied
Peiran Wei, Ciera Cipriani, Chia-Min Hsieh, Krutarth Kamani, Simon Rogers, Emily Pentzer
Summary: The rapid development of additive manufacturing, also known as 3D printing, has led to innovations in industry and academia. Direct ink writing (DIW) is an extrusion-based 3D printing technology that can create complex structures with excellent mechanical properties. However, the relationship between ink rheology and printability needs further investigation.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Mechanics
Jiachun Shi, Simon A. Rogers
Summary: A new rheological formalism based on recovery is proposed, which demonstrates the advantages of the new approach and develops a new constitutive model. The study reveals a clear correlation between microstructural evolution and material responses.
JOURNAL OF NON-NEWTONIAN FLUID MECHANICS
(2023)
Article
Mechanics
Patrick J. Mccauley, Michelle A. Calabrese, Satish Kumar
Summary: This study investigates the influence of wall slip on the spatiotemporal evolution of flow field during shear banding in flowing wormlike micelle solutions. The results show that introducing wall slip delays the onset of shear banding and reduces the width of the high-shear-rate band. Wall slip also dampens the magnitude of the apparent shear rate, extending the time for shear-banded flow to develop.
JOURNAL OF NON-NEWTONIAN FLUID MECHANICS
(2023)
Article
Mechanics
Yul Hui Shim, Piyush K. Singh, Simon A. Rogers
Summary: This study revisits the material functions of polyvinyl alcohol-borax hydrogel and worm-like micelles under medium amplitude oscillatory shear using recovery rheology. It shows that two competing mathematical formalisms derived from the total strain provide different physical interpretations, but provide unified interpretations when describing the decomposed strains.
JOURNAL OF RHEOLOGY
(2023)
Article
Food Science & Technology
Anh Nghi Minh Le, Merve Yildirim Erturk, Yul Hui Shim, Simon A. Rogers, Jozef Kokini
Summary: The nonlinear rheological behaviors of different types of food were studied using the SPP and FTC methods. The SPP analysis provided more accurate parameters for the linear viscoelastic region and critical strain points. Increasing amplitude led to gradual structural rearrangement in predominantly elastic networks, while suspension and emulsion showed more erratic and abrupt changes. Increasing frequency resulted in dominant elastic responses due to shorter experimental time.
FOOD RESEARCH INTERNATIONAL
(2023)
Correction
Mechanics
Antony N. Beris, Soham Jariwala, Norman J. Wagner
Article
Polymer Science
Jason D. Linn, Lucy Liberman, Christopher A. P. Neal, Michelle A. Calabrese
Summary: This study investigates the impact of polymer architecture and TMA content on the thermoresponsive and thermoreversible behaviors of PNIPAM/TMA copolymers, showing that blocky-functionalized copolymers exhibit better responsiveness and cyclic performance than random copolymers.
Article
Chemistry, Physical
Yu-Fan Lee, Yimin Luo, Tianyi Bai, Scott C. Brown, Norman J. Wagner
Summary: Research on shear thickening colloidal suspensions demonstrates that measurements of the microstructure can elucidate the source of the rheological material properties. Neutron scattering methods have been used to resolve the longer-length scale microstructure in the shear thickened state. These findings provide experimental evidence and guidance for theoretical investigations.