Article
Mechanics
Yanan Gong, Valeriy Ginzburg, Sylvie Vervoort, Jaap Den Doelder, Ronald G. Larson
Summary: The method efficiently predicts the linear and nonlinear rheology of polydisperse polymers by selecting representative polymer molecules and has been successful in testing.
JOURNAL OF RHEOLOGY
(2021)
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.
Review
Chemistry, Physical
Beibei Zhou, John T. Tobin, Stephan Drusch, Sean A. Hogan
Summary: The interfacial properties of dairy proteins are of great interest to the food industry. Various environmental conditions and processes significantly affect the structure and stability of food materials. Further studies may help in designing better interfacial protein structures for different food applications.
ADVANCES IN COLLOID AND INTERFACE SCIENCE
(2021)
Article
Polymer Science
Supun S. Mohottalalage, Andrew P. Saab, Amitesh Maiti
Summary: Ionomers are associative polymers that can form clusters in equilibrium melt, which greatly affect the mechanical, viscoelastic, and transport properties of the system. The size distribution, shape, and stability of these clusters can be controlled by the polymer architecture and the fraction, arrangement, and interaction strength of the ionic groups. Under extensional flows, higher polymer chain-length and fraction of associating groups lead to higher stress and viscosity.
Article
Chemistry, Analytical
Doojin Lee, Amy Q. Shen
Summary: Droplet microfluidics provides a versatile tool for measuring interfacial tensions between immiscible fluids, with the ability to generate emulsion droplets and stretch them under controlled flow conditions in microfluidic devices. The use of quasi-static 2D and 3D models allows for accurate estimation of interfacial tension in confined and unconfined droplet cases during extensional flows, demonstrating the effectiveness of these models compared to conventional techniques.
Article
Polymer Science
Carlos R. Lopez-Barron, Fernando Vargas-Lara
Summary: This study evaluates the tack performance of alpha-olefin molecular bottlebrushes with an elastic modulus 4 to 30 times lower than linear polyolefin (polypropylene). The results show that the tack parameters increase monotonically with the increase of bottlebrush side chain length (Nsc) and the decrease of modulus. All-atom molecular dynamics simulations reveal that the monomeric bonding energy increases with Nscdue to a strong van der Waals interaction between the side chains and the aluminum sheet, overcoming the energy penalty imposed by side-chain bending.
Article
Polymer Science
Carlos R. Lopez-Barron, Fernando Vargas-Lara
Summary: Polymer softness is important for good tack in adhesives. We studied the tack performance of alpha-olefin molecular bottlebrushes with a lower elastic modulus compared to linear polyolefin. The tack parameters increased as the bottlebrush side chain length increased and the modulus decreased. Molecular dynamics simulations showed that the bonding energy increased with side chain length due to strong van der Waals interactions between the side chains and the aluminum sheet.
Article
Chemistry, Multidisciplinary
Quinn Prasser, Daniel Steinbach, Alexander S. Muench, Richard Neubert, Christian Weber, Petra Uhlmann, Florian Mertens, Felix A. Plamper
Summary: Although amphiphiles are widely used to modify interfaces, the process of interfacial reorganization remains unclear in many cases. In this study, a block copolymer system with electrostatic interactions was used to investigate the reorganization kinetics of adsorbed micelles at the water/n-decane interface. The results showed that electrostatic interactions slowed down the reorganization process, allowing for the observation of micellar flattening and merging towards a physically interconnected monolayer. The study also demonstrated that the rheological properties of the interface can be manipulated through redox reactions, and the formation of Prussian blue can stiffen the interface.
Review
Chemistry, Multidisciplinary
Elton L. Correia, Nick Brown, Sepideh Razavi
Summary: This review focuses on the behavior of Janus particles in interfacial systems and highlights the impact of particle anisotropy on interfacial mechanics, emphasizing the importance of understanding particle flow behavior in various applications.
Article
Acoustics
Umar Farooq, Yuanting Liu, Pengqi Li, Zhiting Deng, Xiufang Liu, Wei Zhou, Shasha Yi, Ning Rong, Long Meng, Lili Niu, Hairong Zheng
Summary: This study presents a novel method for measuring interfacial tension of fluids at ultralow volumes using surface acoustic waves, demonstrating its effectiveness in screening for high leptin levels in blood plasma. The proposed device can measure microscale liquid volumes with an error margin of only ±5% at 25°C, providing a solution for pre-diagnosis of various blood-related diseases.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2021)
Article
Mechanics
Iain Muntz, James A. A. Richards, Sam Brown, Andrew B. B. Schofield, Marcel Rey, Job H. J. Thijssen
Summary: Interfacial rheology plays a crucial role in understanding the stability of dispersed systems. However, the current measurement methods have limitations in terms of accuracy. In this study, we developed a contactless interfacial method to measure interfacial shear rheology on liquid/liquid interfaces. The method allows us to obtain material parameters under steady shear conditions and combine macroscopic and microscopic analyses to visualize the correlation between interfacial response and particle assembly.
JOURNAL OF RHEOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Ming Yang, Taotao Yang, Hanjie Deng, Jingjing Wang, Shan Ning, Xing Li, Xiaoning Ren, Yuming Su, Jianfeng Zang, Xiaojian Li, Zhiqiang Luo
Summary: The article introduces a novel adhesive interfacial layer PIN-5NO(2) developed using polyindole derivatives to enhance the adhesion of PEDOT to metal electrodes while maintaining excellent electrical properties. This interfacial layer can improve the electrode's electrochemical performance, stability, and biocompatibility, making it suitable for high-performance neural interfaces.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Physics, Condensed Matter
Nick Brown, Alec de la Pena, Sepideh Razavi
Summary: Interfacial rheology studies were conducted to establish a connection between the rheological characteristics of particle-laden interfaces and the stability of Pickering foams. The behavior of foams stabilized with fumed and spherical colloidal silica particles was investigated, focusing on foam properties such as bubble microstructure and liquid content. Our findings highlight that while both particles can generate long-lasting foams, the resulting Pickering foams may exhibit variations in microstructure, liquid content, and resistance to destabilization mechanisms, stemming from the respective interfacial rheological properties in each case.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2023)
Article
Energy & Fuels
Yarima Mudassir Hassan, Beh Hoe Guan, Lee Kean Chuan, Mohammed Falalu Hamza, Muhammad Adil, Abdullahi Abbas Adam
Summary: This study evaluates the combined effect of Fe2O3/SiO2 nanoparticles on rheology, interfacial tension, and rock surface wettability. The results show that the composite nanoparticles can increase the viscosity of the fluid, reduce the interfacial tension, and alter the wettability of the surface. The synergy effect of the composite nanoparticles has led to significant improvements in interfacial tension and wettability.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Biophysics
Hashem Ahmadi Tighchi, Mohammad Hasan Kayhani, Ali Faezian, Samira Yeganehzad, Reinhard Miller
Summary: Licorice (Glycyrrhiza glabra) is a useful plant in the Fabaceae family with sweet-tasting roots. The root extract of licorice contains natural surfactants and shows promising potential in reducing surface tension and improving foam properties. This study investigates the surface tension, rheology, foamability, and foam stability of licorice root extract (LRE) and aims to contribute to the development of commercial applications involving foams.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2023)
Review
Chemistry, Analytical
Seema Thakral, Kyungtae Kim
Summary: Small-angle scattering (SAS) is a versatile analytical technique that provides detailed structural information at the nanometer scale. It has diverse applications in pharmaceutical material characterization, including identification of liquid-crystalline mesophase of drugs, study of excipient microstructure influence, and optimization of solid dispersions and protein-based therapeutics formulations.
TRAC-TRENDS IN ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Applied
Otavio Augusto Titton Dias, Samir Konar, Antimo Graziano, Alcides Lopes Leao, Jimi Tjong, Shaffiq Jaffer, Mohini Sain
Summary: Photoresponsive functionalized nanofilms with active carbazole units were prepared via radical polymerization on a nanofibrillated cellulose (NFC) backbone. Characterized by various spectroscopy techniques and mechanical testing, these nanofilms showed high tensile strength, hydrophobicity, and luminescence activity, indicating potential applications in flexible organic light emitting devices.
CARBOHYDRATE POLYMERS
(2021)
Article
Green & Sustainable Science & Technology
Nazmus Saadat, Hom N. Dhakal, Jimi Tjong, Shaffiq Jaffer, Weimin Yang, Mohini Sain
Summary: Fuel cell technology is advancing rapidly, with potential applications in trucking and fleet transportation systems. Further research into material properties and plate design is needed to enhance the performance of composite bipolar plates.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Chemistry, Physical
Jared Sisler, Shaihroz Khan, Alexander H. Ip, Moritz W. Schreiber, Shaffiq A. Jaffer, Erin R. Bobicki, Cao-Thang Dinh, Edward H. Sargent
ACS ENERGY LETTERS
(2021)
Article
Chemistry, Physical
M. Semeniuk, R. Tandon, R. Gauvin, J. Tjong, S. Jaffer, Z-H Lu, M. Sain
Summary: Controlled carbonization of biomass yields nanolayered graphitic structures with unique crystalline properties and conductive characteristics, showing great potential for various applications, especially in electromagnetic interference shielding.
MATERIALS TODAY ENERGY
(2021)
Article
Polymer Science
Alireza Bandegi, Kyungtae Kim, Reza Foudazi
Summary: This study investigates the impact of morphology and segmental dynamics on ion transport in polymerized lyotropic liquid crystals. The research highlights that grain size and chain density at the interface are important factors affecting ion conduction in polyLLCs. The study demonstrates that reducing chain density enhances interaction between IL and polymer chains, leading to slower relaxation of the polymer chains. Additionally, confinement in the LLC structure prolongs the relaxation of polymer chains compared to homopolymer/IL mixtures.
JOURNAL OF POLYMER SCIENCE
(2021)
Article
Biochemistry & Molecular Biology
Otavio Augusto Titton Dias, Samir Konar, Viktoriya Pakharenko, Antimo Graziano, Alcides Lopes Leao, Jimi Tjong, Shaffiq Jaffer, Mohini Sain
Summary: Regioselectively substituted nanocellulose was synthesized by protecting the primary hydroxyl group and grafting large capping structures using the different reactivities of primary and secondary hydroxyl groups. Elemental analysis and NMR spectroscopy confirmed successful grafting of trityl group on primary hydroxyl group. The use of an ionic liquid and pyridine binary system was found to be the optimum condition for regioselective functionalization of nanocellulose, with minimal impact on NFC crystallinity during dissolution and deprotection processes. This protection/deprotection approach opens up possibilities for designing advanced engineered nanomaterials and multifunctional devices based on nanocellulose.
Article
Chemistry, Physical
Theo Alerte, Jonathan P. Edwards, Christine M. Gabardo, Colin P. O'Brien, Adriana Gaona, Joshua Wicks, Ana Obradovi, Amitava Sarkar, Shaffiq A. Jaffer, Heather L. MacLean, David Sinton, Edward H. Sargent
Summary: The study focuses on the downstream purification of ethylene produced from the electrochemical reduction of carbon dioxide, highlighting the energy-intensive CO2 removal step. Opportunities to reduce separation energy through improvements in ethylene selectivity, CO2 conversion, and CO2 crossover are identified, emphasizing the need for new, efficient separation processes tailored to CO2 electrolyzer outlet streams.
ACS ENERGY LETTERS
(2021)
Review
Energy & Fuels
David Wakerley, Sarah Lamaison, Joshua Wicks, Auston Clemens, Jeremy Feaster, Daniel Corral, Shaffiq A. Jaffer, Amitava Sarkar, Marc Fontecave, Eric B. Duoss, Sarah Baker, Edward H. Sargent, Thomas F. Jaramillo, Christopher Hahn
Summary: Chemicals and fuels can be generated from CO2 via electrolysers that employ gas diffusion electrodes. This review discusses the key advances and remaining shortfalls of GDE-based CO2 electrolysers, as well as provides an overview of partial current densities, efficiencies, and stabilities achieved.
Article
Energy & Fuels
Amin Solouki, Shaffiq A. Jaffer, Jamal Chaouki
Summary: This paper presents an industrial process scheme for microwave-assisted demetallization and desulfurization of crude oil, showing advantages in efficiency, environmental friendliness, and low energy consumption. Economic investigation indicates the superiority of this process compared to existing technologies, with success depending on microwave power and regeneration process efficiency.
Article
Materials Science, Multidisciplinary
Younes Saadat, Kyungtae Kim, Reza Foudazi
Summary: In this study, a two-step thermoresponsive ultrafiltration membrane was fabricated using a polymerized liquid crystal material. The membrane exhibited reversible thermoresponsive behavior at specific temperatures, enhancing cleaning efficiency and extending product lifespan.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Multidisciplinary Sciences
Wan Ru Leow, Simon Voelker, Raoul Meys, Jianan Erick Huang, Shaffiq A. Jaffer, Andre Bardow, Edward H. Sargent
Summary: The production of hydrogen and hydrocarbon refining contribute significantly to CO2 emissions in the chemicals industry. Coupled electrification can cut emissions by up to 39%, even with the current electricity mix. Chemicals manufacturing is a major greenhouse gas emitter, with over half of the emissions coming from ammonia and oxygenates. By using electrolyzer systems that convert hydrocarbons to oxygenates and generate H-2 from water, emissions from fossil-based ammonia and oxygenates can be reduced by up to 88%. Low-carbon electricity is not necessary for a substantial reduction in global chemical industry emissions, as a 39% reduction can be achieved with the electricity carbon footprint available in the US or China today. Researchers interested in this area are provided with considerations and recommendations.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Ehsan Behzadfar, Kyungtae Kim, Bongjoon Lee, Alex M. Jordan, Olivier Lhost, Shaffiq A. Jaffer, Frank S. Bates, Christopher W. Macosko
Summary: Multilayer coextrusion of polyethylene and polypropylene films can significantly delay dripping time and reduce the number of drips in comparison to conventional melt blends with additives. This additive-free approach provides better control over fire safety parameters in polymers.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Polymer Science
Younes Saadat, Kyungtae Kim, Reza Foudazi
Summary: This study investigates the polymerization kinetics with different thermal initiators in various LLC structures, finding that the IFW system utilizing ammonium persulfate exhibits higher reaction rates and conversion rates compared to the IFO system using azobisisobutyronitrile and benzoyl peroxide. It is also discovered that nanoconfinement effects on polymerization rates can be minimized through the IFW system, as shown in both DSC and chemorheology results. Additionally, polymers obtained from the IFW system show improved mechanical properties compared to those from the IFO system at similar monomer conversions.