Article
Polymer Science
Aref Abbasi Moud
Summary: This study investigates the colloidal behavior of kaolinite particles in water, with and without the addition of polymer flocculant PAM. The addition of PAM forms bridges among particles, increasing their settling rates and densifying the sediment structures. The use of imaging techniques and LUMisizer reveals the size of flocs and the distribution of PAM. The results provide guidance in selecting appropriate polymers and operating conditions for settling clay minerals.
Article
Physics, Multidisciplinary
Tobias Eckert, Matthias Schmidt, Daniel de Las Heras
Summary: This study presents a theoretical approach based on sedimentation paths to predict the effect of gravity on sedimentation phases in mixtures of anisotropic colloids. By revisiting iconic sedimentation-diffusion-equilibrium experiments, the authors demonstrate how gravity and sample height can be control parameters to study bulk phase behavior.
COMMUNICATIONS PHYSICS
(2021)
Article
Chemistry, Physical
Sepehr Saber, Mohammad Zargartalebi, Amin Kazemi, David Sinton
Summary: By adjusting environmental variables such as salinity and temperature, stability of Pickering phase change slurries (PPCS) can be achieved, and their shear-induced instability can be improved. Experimental results indicate that increasing salinity enhances the formulation's resistance to shear-induced instability, and within a certain volume fraction range, viscosity increases significantly. Regardless of salinity, the resulting PPCS formulations remain stable under high pressure and temperature conditions.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Nadia Kashif, Boris Albijanic, Jing Jing Xu, Syahida Syahida, Teresa McGrath, Bogale Tadesse, Muhammad Kashif Nazir
Summary: The influence of bentonite on the grinding efficiencies of ores has been examined in this study. It was found that the presence of bentonite in the ore negatively affected the grinding performance of the ore, but this negative effect was mitigated by adding Ca2+ ions. The addition of Ca2+ ions reduced the repulsive forces between bentonite particles, leading to improved settling rates and grinding performance.
APPLIED CLAY SCIENCE
(2023)
Article
Chemistry, Physical
Leane P. B. Sales, Maryane G. C. de Queiroz, Aline F. da Nobrega, Ana C. V. da Nobrega, Joao J. N. de Douza, Arnaldo M. P. Carneiro
Summary: The rheological characteristics of lime-kaolin residue (metakaolin) slurries were studied through high stress flow, low strain oscillatory, and creep and relaxation tests, showing a predominantly elastic behavior. The presence of metakaolin resulted in less rigid and more elastic slurries, reducing the initial yield stress and viscosity of the lime-based slurries.
APPLIED CLAY SCIENCE
(2021)
Article
Biochemistry & Molecular Biology
Natasha Abbas Butt, Tahira Mohsin Ali, Abeera Moin, Abid Hasnain
Summary: This study prepared two levels of chemically modified starches through extrusion and observed significant structural changes. The extruded starches exhibited different physical properties such as hardness and stability. Dynamic rheology tests revealed that citrate-modified starches had higher viscoelastic properties compared to lactate-modified starches.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Mechanics
Roger I. Tanner
Summary: The paper suggests that a modified Oldroyd-B model can be utilized to describe the rheology of non-colloidal suspensions with a viscoelastic matrix. Professor R. Byron Bird had previously utilized Oldroyd models for around 50 years in studying rheological behavior.
Article
Physics, Fluids & Plasmas
Joost de Graaf, Kim William Torre, Wilson C. K. Poon, Michiel Hermes
Summary: Attractive colloids form gels, which are solidlike particle networks suspended in a fluid. The impact of gravity on the gelation process has been rarely studied. In this study, we used simulations to investigate the effect of gravity on gel formation. We found that gravity-induced flows disrupt gelation at low volume fractions, but above a critical volume fraction, the forming gel network dominates the dynamics. The settling of colloids does not significantly affect the final colloidal gel-like sediment.
Article
Chemistry, Physical
Rafael Catarino-Centeno, Gabriela Hilario-Acuapan, Rosalba Patino-Herrera, Erwin Garcia-Hernandez
Summary: This work presents a numerical solution for determining the concentration profiles of a colloidal system of titanium dioxide particles in water over time and space using a classic mathematical model. The solution is obtained through solving partial differential equations numerically using the finite difference method in Python programming. It is found that particle size does not greatly affect the concentration profiles for particles with a diameter > 200 nm, indicating the preservation of mass conservation. The numerical solution of the model has applications in industrial production processes, particularly in the design and production of long-lasting paints and coatings.
COLLOID AND POLYMER SCIENCE
(2023)
Article
Multidisciplinary Sciences
Florence J. Mueller, Lucio Isa, Jan Vermant
Summary: In this study, an innovative approach to improve colloidal gels by introducing surface roughness to the particles is proposed, resulting in enhanced toughness and self-healing properties. The functionalized rough particle gels show potential for various applications, such as xerogel fabrication and high-fidelity extrusion 3D-printing.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
C. D. Reynolds, J. Lam, L. Yang, E. Kendrick
Summary: This study quantifies the extensional properties of battery electrode slurries using a miniature extensional rheometer. The results show significant variations in extensional behavior between different formulations and binder systems. This novel extensional rheology technique is essential for understanding flow in a coater and the underlying slurry structure.
MATERIALS & DESIGN
(2022)
Article
Energy & Fuels
D. S. Romanov, V. V. Dorokhov, K. Yu. Vershinina, P. A. Strizhak
Summary: The paper investigates the influence of stabilizing additives on the properties of fuel slurries derived from coal slime. Different additives were tested and compared, and it was found that they can effectively reduce the proportion of separated liquid, lower the ignition temperature, and accelerate the ignition process. Waste turbine oil and sodium lignosulfonate were the most effective additives. In terms of feasibility, the cost of preparing a slurry from coal slime is higher compared to using bituminous coal, but the payback period for other fuels is shorter.
Article
Chemistry, Physical
A. Gülce Bayram, Fabian Jan Schwarzendahl, Hartmut Lowen, Luca Biancofiore
Summary: This paper investigates the role of self-propulsion in the rheological response of a dense colloidal suspension through particle-resolved Brownian dynamics simulations. It is found that self-propulsion lowers the stress barrier needed to be overcome during the disordering transition of the suspension. The rheological response of the active sheared system shows a transition from shear-thinning to shear-thickening behavior with increasing self-propulsion, attributed to clustering induced by motility.
Article
Chemistry, Analytical
Adrian Lomeli-Martin, Olivia D. Ernst, Braulio Cardenas-Benitez, Richard Cobos, Aditya S. Khai, Blanca H. Lapizco-Encinas
Summary: Recent findings suggest that in insulator-based electrokinetics under direct current fields, dielectrophoresis is not the main mechanism responsible for particle manipulation. Instead, the combined effects of electroosmosis, linear and nonlinear electrophoresis play a more significant role. A new methodology has been developed to estimate the nonlinear electrophoretic mobility of colloidal particles, but it is limited to particles with specific properties. This study aims to expand on this methodology and investigate the properties of particles with different characteristics, as well as identify current limitations in experimental determination of nonlinear electrophoresis.
ANALYTICAL CHEMISTRY
(2023)
Article
Engineering, Chemical
Kai Lv, Fanfei Min, Jinbo Zhu, Bao Ren, Xuejie Bai, Chuanzhen Wang
Summary: This study investigates the dynamic characteristics of fine kaolinite particle sedimentation using experimental and computational methods. The results show that particle shape and liquid properties significantly affect sedimentation, and the modified spherical coefficient can effectively predict particle terminal velocity.
Editorial Material
Engineering, Geological
David Reid, Andy Fourie, Juan Luis Ayala, Simon Dickinson, Felipe Ochoa-Cornejo, Riccardo Fanni, Juan Garfias, Antonio Viana Da Fonseca, Mason Ghafghazi, Carlos Ovalle, Michael Riemer, Amin Rismanchian, Roberto Olivera, Gonzalo Suazo, Luis Alberto Torres-Cruz
Article
Chemistry, Physical
Yee-Kwong Leong, Pengfei Liu, Jishan Liu, Peta Clode, Weian Huang
Summary: Composite NaMnt (SWy-2)-kaolin (KGa-2) gels with more than 10 wt% solids and a NaMnt fraction of 20% exhibit an open cellular microstructure. The flexible nanosized NaMnt platelets form a continuous structure with dispersed kaolin particles, resulting in various unique particle interaction configurations. The study also reveals the thixotropic and rheopectic behaviors of a 15.5 wt% gel with a 1:2 mass ratio of NaMnt to kaolin. Evaluation of the gel's structural development kinetics and aging behavior further provide insights into the formation process of continuous structures. Rating: 8/10.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Energy & Fuels
Jianwei Tian, Jishan Liu, Derek Elsworth, Yee-Kwong Leong, Wai Li
Summary: In this study, a dual-fractal permeability model was proposed to investigate the impacts of coal internal structure on permeability. The model considers the effects of pore-fracture size distribution and effective stress, and incorporates multiple flow mechanisms.
Article
Chemistry, Physical
Won-Tae Lee, Jong-Taek Yeom, Jung Gi Kim, Jeong Seok Oh, Taekyung Lee, Yinong Liu, Shuanglei Li, Tae-Hyun Nam
Summary: This study investigates the microstructure evolution and nanoindentation behavior of a Ti-20Zr-9Nb-4Sn alloy aged at 600 degrees C, demonstrating the potential for precipitation strengthening effect of (Zr,Sn)-rich precipitates. The results show that the hardness of the aged specimens initially increases and then reaches a plateau as aging time prolongs. The (Zr,Sn)-rich precipitates exhibit higher hardness than the alpha precipitate and matrix, indicating their contribution to the overall hardness of the specimen.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Yingchao Li, Bashir S. Shariat, Hong Yang, Yinong Liu
Summary: NiTi shape memory alloys exhibit Luders-type deformation in tension. We propose a new explanation of the mechanism of this behaviour based on a mechanical criterion of sample length change conservation among three contributions, including machine displacement, Luders band elongation and elastic strain contraction, and established a mathematical model to describe the behaviour.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Yingchao Li, Junsong Zhang, Martin Saunders, Yang Ren, Hong Yang, Yinong Liu
Summary: By utilizing the principles of lattice strain matching and collective atomic load transfer, ultralarge elastic strains were induced in a brittle NiTi-Nb3Sn eutectic composite, where Nb3Sn lamellae achieved a remarkable elastic lattice strain of -2.4%. This study both tests the applicability of lattice strain matching in brittle materials and explores a novel fabrication approach for in-situ composites via eutectic solidification.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Editorial Material
Engineering, Geological
Juan Ayala, Andy Fourie, David Reid
CANADIAN GEOTECHNICAL JOURNAL
(2023)
Editorial Material
Engineering, Geological
David Reid, Riccardo Fanni, Andy Fourie
CANADIAN GEOTECHNICAL JOURNAL
(2023)
Article
Chemistry, Physical
E-Jen Teh, Yee-Kwong Leong
Summary: This study explains the cause of unusual behaviour in colloidal suspension and provides a new method to alleviate biofouling and scaling problems. The yield stress-pH behaviour of silica suspensions differs depending on the direction of pH change. Precipitate bridging is responsible for the yield stress, with composite precipitates formed by soluble silica and organic acid anions. The presence of fumarate and high pH enhances the yield stress, and avoiding a high pH operating environment can mitigate biofouling and scaling.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Review
Energy & Fuels
Qi Gao, Jishan Liu, Yee-Kwong Leong, Derek Elsworth
Summary: The significant effects of gas sorption induced swelling on shale permeability have been studied through laboratory measurements and explained using permeability models. However, there are lab observations that cannot be explained by these models, leading to a knowledge gap. In this review, the authors aim to resolve this gap by assessing the role of swelling on shale permeability through data collection, model classification, and correlation assessments. The findings suggest that discrepancies between model predictions and lab measurements depend on various factors, including the relationship between bulk and pore swelling strains, pore size scales, and consistency of strain treatments. The authors propose that future research should focus on characterizing the transformation between bulk and pore swelling strains, considering shale multiscale pore structural characteristics, and incorporating the time-dependent nature of swelling strain and permeability evolution.
Article
Engineering, Geological
Riccardo Fanni, David Reid, Andy Fourie
Summary: The determination of void ratio in the torsional shear hollow cylinder (TSHC) apparatus is proposed in this paper, providing simple steps and calculations. This method is potentially more accurate than methods based on initial dimensions measurements and does not require costly internal instrumentation. It addresses the issue of volumetric collapse during saturation in loose moist tamped specimens used for critical state locus (CSL) testing.
GEOTECHNICAL TESTING JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Yuru Zha, Daqiang Jiang, Yinong Liu, Genfa Kang, Hui Zhang, Xiaohua Jiang, Lishan Cui
Summary: By observing the Elinvar effect in non-magnetic Co-doped TiNi alloys, we added a small amount of Nb to Ti50Ni41Co9 alloy with low Co content to regulate the phase transformation behaviors and induce Elinvar effect. The effects of Nb content on the phase transformation behaviors and temperature dependences of elastic moduli were studied. Ti50Ni41Co9 alloy exhibited B2->R phase transformation during cooling, but it was suppressed by the increase of Nb content and converted to a continuous transformation over a broad temperature range.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Computer Science, Interdisciplinary Applications
Jianwei Tian, Jishan Liu, Derek Elsworth, Yee-Kwong Leong
Summary: In this study, a 3D discrete fracture model (DFM) was proposed to represent the distribution of natural fractures (NFs). Gas flow in shale matrix was represented by a dual-fractal permeability model (DFPM). A hybrid DFPM-DFM model was proposed to couple gas flow and geomechanics and solved using finite element method. The model was verified with field data and used to investigate the impacts of fractally-distributed pore size and fracture attributes on permeability evolution and gas production.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Engineering, Geological
D. Reid, F. Urbina, B. Tiwari, R. Fanni, K. Smith, A. Fourie
Summary: The laboratory element testing shows that sandy silt/silty sand tailings exhibit significant reduction in brittleness at high stresses due to the curvature of critical state line and limiting compression curve. However, most of the testing involves low-confining stresses during saturation, which differs from the potential in situ loading within a filtered tailings stack. A series of isotropically consolidated triaxial tests were conducted to investigate the effects of saturation process at different confining stresses, indicating similar magnitudes of brittleness as observed in flow liquefaction case histories.
GEOTECHNIQUE LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Zibing An, Shengcheng Mao, Cheng Jiang, Ziyao Li, Shichang Wu, Yadi Zhai, Li Wang, Yinong Liu, Ze Zhang, Xiaodong Han
Summary: A high-entropy alloy (HEA) with low stacking fault energy and high strength was designed using the principle of heterostructure strengthening. The alloy exhibited a multi-scale heterogeneous microstructure containing hierarchical twins. It achieved ultrahigh yield strength, ultimate tensile strength, and large ductility at low temperature, surpassing most FCC HEAs reported so far and breaking the strength-ductility trade-off of conventional metal alloys. The extraordinary mechanical properties were attributed to a suitable strain hardening capability resulting from the synergistic effect of hetero-deformation-induced hardening, twinning-induced plasticity, and deformation-induced phase transformation.
SCRIPTA MATERIALIA
(2024)
Article
Engineering, Chemical
Qing Han, Mengqing Shi, Linkai Han, Di Liu, Mingwei Tong, Yuxin Xie, Zhonghua Xiang
Summary: Developing highly efficient bifunctional oxygen electrocatalysts is crucial for zinc-air flow batteries. Metal-organic frameworks (MOFs) and covalent organic polymers (COPs) have emerged as promising alternatives due to their designable and controllable atomic-level structures. However, their catalytic performances are limited by conductivity and catalytic activity. In this study, nanosheet FeNi-MOF and iron phthalocyanine rich COP hybrid materials are assembled through the pi-pi stacking effect to create highly efficient bifunctional electrocatalysts. The resulting catalyst exhibits superior catalytic performance and stability, making it a promising candidate for zinc-air flow batteries.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Daria Grigorash, Dmytro Mihrin, Rene Wugt Larsen, Erling H. Stenby, Wei Yan
Summary: The article introduces a new approach to describe the cross-association between molecules, allowing for the simulation of weakly bound molecular complexes with different conformations in mixtures. By incorporating this approach into the equation of state, accurate predictions of vapor-liquid equilibrium and liquid-liquid equilibrium can be made. The new method is validated through experiments on alcohol and acid mixtures, with the results compared to experimental data, demonstrating its accuracy and reliability.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Mohammed Al-Sharabi, Daniel Markl, Vincenzino Vivacqua, Prince Bawuah, Natalie Maclean, Andrew P. E. York, Axel Zeitler
Summary: This study used terahertz pulsed imaging to investigate the transport process of different solvents into ceramic catalytic materials. The results showed that the heating rate of the samples influenced the water transport rate, while the viscosity of 1-octanol slowed down its transport.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Chukwunonso Anyaoku, Sati Bhattacharya, Rajarathinam Parthasarathy
Summary: This study aimed to enhance understanding of settling dynamics in viscoelastic fluids by developing a semi-empirical correlation and a dimensionless ratio, which accurately described the characteristics of settling suspensions.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Antti I. Koponen, Janika Viitala, Atsushi Tanaka, Baranivignesh Prakash, Olli-Ville Laukkanen, Ari Jasberg
Summary: This study focuses on the development of foam application chemicals for the paper and board industry. The research explores the rheology of the polyvinyl alcohol foam used in the process. Measurements were conducted to determine the foam viscosity and slip flow. The results suggest that slip flow contributes significantly to the total flow rate, and the obtained viscosity and slip models provide a solid foundation for industrial processes.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Dalei Sun, Jinghui Cai, Yating Yang, Zhiwu Liang
Summary: In this study, Fe-doped alpha-Bi2O3 catalysts with different Fe/Bi molar ratios were synthesized and utilized in the carbonylation of isobutyl amine with CO2. The results showed that Fe doping significantly enhanced the catalytic abilities of alpha-Bi2O3.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Yuan Tian, Xinxin Wang, Yanrong Liu, Wenping Hu
Summary: This paper predicts the solubility of nitrogen gas in ionic liquids (ILs) using two quantitative structure-property relationship (QSPR) models. By combining machine learning methods and ionic fragments contribution method, the accuracy and reliability of the prediction models are improved.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Liwang Wang, Wei Liu, Pan Yang, Yulong Chang, Xiaoxu Duan, Lingyu Xiao, Yaoming Hu, Jiwei Wu, Liang Ma, Hualin Wang
Summary: This study investigates the effective phase interfacial area (ae) of hydro-jet cyclones at different injection angles. The results show that a 45 degrees upward incidence angle yields the most favorable flow field characteristics for efficient mass transfer. The significant enhancement in ae of the hydro-jet cyclones offers the advantage of reducing equipment volume and cost savings.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Chuanjun Wu, Jiangzhi Chen, Jiyue Sun, I-Ming Chou, Shenghua Mei, Juezhi Lin, Lei Jiang
Summary: In this study, the solubility of H2S hydrate in water was measured using Raman spectroscopy. The results showed that the solubility increases with temperature under certain equilibrium conditions, and the solubility also depends on pressure and temperature under different equilibrium conditions. A thermodynamic model based on the van der Waals-Platteeuw theory was developed to predict the solubility, demonstrating its accuracy.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Lorenzo Brivio, Serena Meini, Mattia Sponchioni, Davide Moscatelli
Summary: This study investigates the influence of three main parameters and proposes a kinetic model to predict the optimal operating conditions for high yield of dimethyl terephthalate (DMT) in the chemical recycling process of polyethylene terephthalate (PET).
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Hongju Lin, Fanhui Liao, Yanchang Chu, Mingyu Xie, Lun Pan, Yuanyuan Wang, Lijian Leng, Donghai Xu, Le Yang, Gangfeng Ouyang
Summary: A honeycomb NiCo/C-Na catalyst with a micro-meso-macroporous structure has been fabricated and shown to have significantly higher catalytic activity for the decarboxylation of fatty acids. It also proves to be efficient in upgrading sludge HTL bio-crude, resulting in a biofuel with decreased viscosity and increased density.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Xiaoxian Li, Rui Li, Min Lin, Mingde Yang, Yulong Wu
Summary: A series of coated non-noble metal porous carbon catalysts were synthesized and applied to the aqueous-phase deoxygenation of algal bio-oil. One of the catalysts showed excellent deoxygenation selectivity and catalytic activity at 250 degrees C. The catalyst exhibited good hydrothermal stability and the reaction mechanism was proposed based on product analysis and active site analysis.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
M. V. Chudakova, M. V. Popov, P. A. Korovchenko, E. O. Pentsak, A. R. Latypova, P. B. Kurmashov, A. A. Pimenov, E. A. Tsilimbaeva, I. S. Levin, A. G. Bannov, A. V. Kleymenov
Summary: A series of catalysts with different potassium contents were prepared using solution combustion synthesis and characterized using various techniques. The results showed that the potassium content affected the phase composition and texture of the catalysts. The addition of a small amount of potassium resulted in a change in particle size distribution, leading to higher hydrogen yield. The Ni-1%K2O/Al2O3 catalyst exhibited the highest hydrogen yield at temperatures of 675 and 750 degrees Celsius.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Aliakbar Roosta, Nima Rezaei
Summary: In this study, we modified the electrolyte cubic plus association equation of state (e-CPA EoS) and integrated it with two electrical conductivity models to estimate the electrical conductivity of 11 monovalent electrolyte solutions in water. The modified e-CPA model demonstrated better performance and the hybridization with electrical conductivity models resulted in two predictive models for estimating the electrical conduction of dilute and concentrated electrolyte solutions. These predictive models showed relative average percentage deviations (AARD) of 11.15% and 13.87% over wide ranges of temperature and electrolyte concentration.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Haoren Niu, Jianzheng Wang, Qingzhu Jia, Qiang Wang, Jin Zhao, Fangyou Yan
Summary: A study developed two quantitative structure-property relationship models for the complexation performance of alpha- and beta-cyclodextrins and validated their stability and predictive ability through internal and external validation. The models showed robustness and satisfactory performance, as demonstrated by the experimental results and model validations. These models can effectively predict the binding constants between cyclodextrins and various types of molecules, providing valuable tools for cyclodextrin design.
CHEMICAL ENGINEERING SCIENCE
(2024)
