Article
Chemistry, Multidisciplinary
Jan-Michael Y. Carrillo, Zhan Chen, Uvinduni I. Premadasa, Christian Steinmetz, E. Bryan Coughlin, Benjamin Doughty, Thomas P. Russell, Bobby G. Sumpter
Summary: By conducting experimental and simulation studies, this research addresses the issues of assembly, reconfiguration, and equilibrium conformation of charged star block copolymers at the oil-water interface, with implications for the development of novel surfactants or amphiphiles.
Article
Engineering, Environmental
Mingyue Yuan, Wen Nie, Hai Yu, Jiayi Yan, Qiu Bao, Weiwei Zhou, Yun Hua, Lidian Guo, Wenjin Niu
Summary: The study combined experimental methods with molecular dynamic simulations to investigate the wetting and adsorption effects of different surfactants on low-rank coal. The results showed that CAB had better wetting and adsorption performance on LRC than CDEA. This combined approach identified better surfactants for the suppression of coal dust.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Editorial Material
Engineering, Chemical
Tuna Yildirim, Sudheera Yaparatne, John Graf, Sergi Garcia-Segura, Onur Apul
Summary: This study evaluates the derivation assumptions of the Young-Laplace equation and discusses possible modifications to make conclusive remarks about its predictive power at the nano-scale.
Article
Chemistry, Applied
Emilia Heinonen, Gunnar Henriksson, Mikael E. Lindstrom, Francisco Vilaplana, Jakob Wohlert
Summary: This study used molecular dynamics simulations to investigate the adsorption of xylan onto cellulose fibrils. The results showed that xylan forms a rigid and ordered layer, serving as a transition phase to more flexible and disordered polysaccharide and lignin domains.
CARBOHYDRATE POLYMERS
(2022)
Article
Polymer Science
Azar Shamloo, Denis Rodrigue, Armand Soldera
Summary: Bulk processes play a significant role in polymer properties, with high pressure processing conditions affecting material properties. Molecular simulation is a valuable tool for studying molecular behavior, and an appropriate model is necessary for accurate results. Furthermore, the proposed model of a single nanocrystal surrounded by alkane chains can accurately reproduce semi-crystalline systems and mimic amorphous environments.
Article
Chemistry, Physical
Xuewen Cao, Wenzhu Xia, Pan Zhang, Hengguang Cao, Xiang Li, Xingyao Zhang
Summary: This study investigates the effects of salt on the interfacial tension, adsorption behavior, and interface characteristics of surfactant solutions. It is found that the addition of salt can accelerate the adsorption kinetics, increase the adsorption capacity, and create more vacant sites on the interface. Furthermore, magnesium ions facilitate the rapid change in the orientation of the headgroups and reduce the thickness of the double electric layer.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Physical
Zhiyong Yu, Songtai Lv, Xin Zhang, Hongtao Liang, Wei Xie, Yang Yang
Summary: We computationally investigated the mechanical response of a molten lead surface system to cyclic loads and explored how the system follows classical physics. The oscillation of dynamic surface tension under different driving frequencies and amplitudes was compared to a damped oscillator. The results showed an increase in surface tension and revealed the relationship between natural frequencies and atomic correlation functions. These findings have implications for manipulating liquid surfaces using shockwaves or laser pulses.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Mengying Wang, Zixiang Cui, Yongqiang Xue
Summary: This paper presents a novel method to determine the interfacial tension, temperature coefficient, and Tolman lengths of nanomaterials using adsorption thermodynamics and kinetics. The experimental results indicate that the particle size of nanoparticles has significant effects on the interfacial tension and its temperature coefficient, as well as the Tolman length. The effects of particle size on interfacial tension and Tolman length become more significant when the particle radius approaches or reaches the order of magnitudes of molecular (or atomic) radius.
Article
Materials Science, Multidisciplinary
Ensieh Yousefi, Youqing Sun, Anil Kunwar, Muxing Guo, Nele Moelans, David Seveno
Summary: In this study, the surface tension of pure Al and Al-O systems was thoroughly investigated using Molecular Dynamics simulations. The results showed that surface tension is sensitive to oxygen content and temperature, and a good agreement was found between measured and predicted values. Additionally, simulations at different temperatures with varying oxygen contents elucidated the effects of controlled atmospheric conditions on surface tension.
Article
Chemistry, Multidisciplinary
Mengsu Peng, Timothy T. Duignan, Cuong Nguyen, Anh Nguyen
Summary: Surfactants play a central role in various scientific and engineering fields, but understanding their behavior at the air-water interface still presents challenges. Research focuses on accurately describing the adsorption layer thickness of surfactants in this area. The modified Poisson-Boltzmann model has been developed to address the effects of surfactants at the air-water interface, with remaining challenges and future research directions also discussed.
Article
Engineering, Chemical
Yunqiao Ma, Andrew L. Zydney, Jia Wei Chew
Summary: Molecular dynamics simulations were used to investigate the adsorption of positively-charged lysozyme onto negatively-charged polyvinylidene fluoride membrane under different pH and ionic strength conditions. Local interactions play a crucial role in determining the adsorption behavior, with certain key adsorption sites identified on the lysozyme. The results highlight the importance of considering local interactions in membrane fouling by proteins under varying feed conditions.
Article
Energy & Fuels
Marcelle B. M. Spera, Luis F. M. Franco
Summary: The study investigates the changes in adsorption behavior of confined hydrocarbons under the influence of geothermal gradients using non-equilibrium molecular dynamics simulations. The results suggest that the adsorption behavior of the media is unexpectedly different under different local temperature gradients.
Article
Chemistry, Physical
Shubham Tiwari, Sadanandam Namsani, Jayant K. Singh
Summary: This study systematically investigates the combined effect of ionic surfactants and inorganic salts on interfacial properties using experiments, theoretical models, and molecular dynamics simulations. The results reveal increased surfactant packing and decreased surface tension at the air-liquid interface in the presence of salt.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Thermodynamics
Chun-Mei Wu, Xiang Wei, You-Rong Li
Summary: By integrating the Zeta adsorption model and molecular dynamics simulations, the transition process of argon atoms adsorption on a solid surface can be studied effectively. The influence of solid-fluid interaction strength and temperature difference is crucial in determining the critical temperature difference for the transition. The results from theoretical prediction are in good agreement with the molecular dynamics simulations, providing insights into the cluster formation and transition processes.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Chemistry, Physical
Kohei Shimada, Yoshifumi Kimura
Summary: The capillary wave and thermal diffusion at the gas-liquid interface of 1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide were investigated using interface-selective transient grating spectroscopy. The study found that the capillary wave exhibited damping at the interface, and the damping constant was higher than predicted by hydrodynamic theory. The thermal diffusivities at the interface were lower for longer alkyl chains, possibly due to the formation of a layered structure.
JOURNAL OF MOLECULAR LIQUIDS
(2023)