Article
Engineering, Multidisciplinary
Yuan Fang, Long-yuan Li, Jean-Baptiste Mawule Dassekpo, Sung-Hwan Jang
Summary: An analytical prediction model for the heat transfer analysis of two-phase composite materials is developed, taking into account various factors influencing the effective properties of composite materials. The validation of the model using experimental data demonstrates the accuracy and reliability of the model.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Chemistry, Physical
Yu Cai, Huitao Yu, Can Chen, Yiyu Feng, Mengmeng Qin, Wei Feng
Summary: Vertically aligned carbon nanotube (VACNT) arrays have superior vertical thermal conductivity but suffer from weak interaction between adjacent carbon nanotubes (CNT) during polymer infiltration. This study introduces a novel three-dimensional CNT (3DCNT) network structure, where VACNT is crosslinked by secondary CNT, to provide in-plane phonon paths and maintain structural stability. Results show that the 3DCNT20/P composite has significantly higher vertical and horizontal thermal conductivity compared to the IVACNT/P composite.
Article
Materials Science, Composites
Hanying Zou, Yanhui Feng, Xiaolong Tang, Xinxin Zhang, Lin Qiu
Summary: The excellent properties of carbon nanotubes allow for high thermal and electrical conductivity, but the weak coupling between them leads to performance below expectations. This study introduces polypyrrole (PPy) to improve both electrical and thermal conductivity of carbon nanotube-based materials, providing new design ideas for advanced electronic devices.
COMPOSITES SCIENCE AND TECHNOLOGY
(2024)
Article
Thermodynamics
Dawei Li, Qin-Yi Li, Koji Takahashi
Summary: This new thermal measurement method combines electron beam heating with suspended line-shaped heat flux sensors, allowing for high-resolution mapping of thermal property distribution in SEM. By eliminating thermal contact resistance error, the true thermal conductivity of the material can be accurately extracted.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Physics, Multidisciplinary
Hao Yin, Zhiguo Liu, Juekuan Yang
Summary: This paper proposes a model for predicting the thermal conductivity of carbon nanotube networks, considering them as contact thermal resistance networks. The model we proposed shows better agreement with experimental results compared to previous models.
Article
Environmental Sciences
Jialing Song, Qian Deng, Manhong Huang, Zhuang Kong
Summary: In this study, nanofiber membranes were fabricated using carbon nanotubes (CNTs) and polyvinylidene fluoride-co-hexafluoropropylene (PcH) by electrospinning. The heat-press treatment improved mechanical strength and liquid entry pressure of the membranes, while the incorporation of CNTs enhanced hydrophobicity and mechanical strength. The nanofiber membranes showed high potential for membrane distillation (MD) application with high salt rejection efficiencies and dye removal rates exceeding 99.99%.
ENVIRONMENTAL RESEARCH
(2022)
Article
Chemistry, Analytical
Seoho Jung, Roland Hauert, Miroslav Haluska, Cosmin Roman, Christofer Hierold
Summary: By using Ar-ion etching to remove the top layer of the electrode surface before nanotube placement, the contact resistance at the nanotube-metal interface can be significantly reduced. This results in a tenfold decrease in the median ON-resistance of transistors and a more than two orders of magnitude decrease in the interquartile range of resistance values.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Materials Science, Multidisciplinary
Daniel Bruns, Alireza Nojeh, A. Srikantha Phani, Jorg Rottler
Summary: Phonons play a significant role in thermal transport in nanotubes, with their scattering rates varying with the mechanical strain in the nanotubes. These different scaling rates depend on the strain in the nanotubes and the polarization direction of the acoustic modes.
Article
Chemistry, Multidisciplinary
Seokwon Joo, Chae-Eun Lee, Jeongmin Kang, Soonmin Seo, Yoon-Kyu Song, Ju-Hyung Kim
Summary: A intaglio contact printing method based on CNT/paraffin composite is proposed in this study, which enables highly precise CNT network patterns on various substrates. The method shows high resolution patterning, durability against structural deformations, and rapid repair of fatigue-induced damage.
Article
Engineering, Chemical
Zhigang Guo, Xing Tian, Zhoutuo Tan, Jian Yang, Shang Zhang, Qiuwang Wang
Summary: In this study, the heat transfer coefficients in ordered and random packing sphere particles were simulated using the finite volume method to investigate contact resistance and penetration resistance. It was found that contact resistance is mainly determined by the effective thermal conductivity in the wall region, while penetration resistance is affected by heat capacity, thermal conductivities, and particulate structures. The impact is reflected in the modified equivalent heat absorption coefficients in granular flows.
Article
Chemistry, Physical
Xiaoling Zhang, Jing Ma, Ruiwen Yan, Wangxin Cheng, Jun Zheng, Baokang Jin
Summary: The study successfully prepared Pt-Ru/polyaniline/carbon nanotubes composites with excellent performance, showing higher activity and stability compared to Pt/C and other catalysts.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Environmental
Beomsu Shin, Subhadip Mondal, Minkyu Lee, Suhyun Kim, Yang-Il Huh, Changwoon Nah
Summary: This study explores the effects of different lengths of CNTs on the performance of TPU composites, with long CNTs offering higher EMI shielding efficiency and short CNTs enhancing thermal conductivity. Long CNTs help form unique interconnected conductive networks within the TPU matrix, improving the overall performance of the composites.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Energy & Fuels
Braulio Beltran-Pitarch, Jesse Maassen, Jorge Garcia-Canadas
Summary: A new comprehensive impedance model has been proposed in this study to provide a more thorough description of thermoelectric module performance and explain existing deviations. Through fittings to modules fabricated by different manufacturers, key properties such as internal thermal contact resistances were successfully identified.
Article
Chemistry, Physical
Dong-Kwan Lee, Jongchan Yoo, Hyunwoo Kim, Byung-Ho Kang, Sung-Hoon Park
Summary: Studies have shown that nanofillers such as carbon nanotubes play a significant role in improving the thermal conductivity of polymers, with multi-walled carbon nanotube/polymer composites exhibiting excellent electrical and thermal properties, making them suitable for use as flexible and lightweight heat transfer materials.
Article
Chemistry, Physical
Liyuan Han, Caixiang Xiao, Qiang Song, Xuemin Yin, Wei Li, Kezhi Li, Yunyu Li
Summary: In this study, the mechanical properties of carbon nanotube (CNT)-reinforced carbon/carbon (C/C) composites were enhanced by seamlessly growing graphene nanosheets (GN) on the surface of CNT. The growth of GN improved stress transfer efficiency and effectively stiffened the interface, resulting in a significant increase in interlaminar shearing strength of the composite material.
Article
Materials Science, Multidisciplinary
Dawei Xia, Jian Yang, Mingqian Li, Hongpeng Gao, Feng Gong
Summary: The study focuses on the trend of using less cobalt, especially in lithium ion batteries. By doping Mn into cobalt vanadate, a novel mixed Co/Mn vanadate with optimized performance and cost is obtained, showing high initial discharge capacity and good stability after cycles.
Article
Chemistry, Multidisciplinary
Dawei Xia, Dongdong Wang, Wenlong Liu, Feng Gong
Summary: Vanadates have gained attention for their potential use in electrochemical devices like batteries and electrocatalysis. However, the challenges of obtaining pure-phase transition metal vanadates, particularly nickel-based ones, have hampered their development. A new method of fabricating grape-like Ni2V2O7 microspheres has been successfully demonstrated, showing excellent electrochemical performance, suggesting new opportunities for nickel vanadates in electrochemistry.
CHEMISTRY-AN ASIAN JOURNAL
(2021)
Article
Electrochemistry
Chenxu Miao, Genglei Xia, Kai Zhu, Ke Ye, Qian Wang, Jun Yan, Dianxue Cao, Feng Gong, Guiling Wang
Summary: Bimetallic metal selenides have shown potential as electrode materials for energy storage systems. The study found that Ni1/2Co1/2Se2 composite exhibits high specific capacity and long-term stability, making it suitable for high-performance supercapacitor devices.
ELECTROCHIMICA ACTA
(2021)
Article
Engineering, Environmental
J. W. Loh, Xue Yang Goh, Phuc T. T. Nguyen, Quoc B. Thai, Z. Y. Ong, Hai M. Duong
Summary: This study developed wool aerogels using wool waste fibers and PVA as a cross-linking binder, with high porosity (97.73-99.63%) and low densities (0.004-0.023 g/cm(3)). The aerogels showed great oil absorption performance and hydrophobicity, outperforming commercial counterparts. The fabrication technique used was also faster and more efficient than conventional methods.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2022)
Article
Multidisciplinary Sciences
Oanh L. Pham, Samuel E. Feher, Quoc T. Nguyen, Dimitrios Papavassiliou
Summary: The configuration of proteins is crucial for their biochemical behavior, and mechanical stresses can have a significant impact on them, leading to the development of diseases. Extensional stresses, often overlooked, can affect the structure of von Willebrand factor (vWF) protein at much lower stress levels than shear stresses. This study examined the statistical distribution of extensional stress on models of the vWF molecule in turbulent flow and found that the distribution of stresses is important for the design of blood flow devices.
SCIENTIFIC REPORTS
(2022)
Article
Polymer Science
Thao X. D. Nguyen, Tuan V. Vu, Sepideh Razavi, Dimitrios V. Papavassiliou
Summary: This work presents a methodology using dissipative particle dynamics (DPD) to simulate the flow of oil and water in a narrow slit under different flow conditions. It introduces large surfactant molecules at the oil-water interface to investigate their effects on the two-phase flow. The study provides insights into the stability of the interface under different flow conditions and verifies the accuracy of the DPD parameters.
Review
Environmental Sciences
Phuc T. T. Nguyen, Nga H. N. Do, Xue Yang Goh, Chong Jin Goh, Ren Hong Ong, Phung K. Le, Nhan Phan-Thien, Hai M. Duong
Summary: This review provides an overview of the status of aerogels made from various types of waste, focusing on their fabrication, properties, and applications. It introduces common methods of synthesizing waste aerogels, summarizes works related to waste aerogels, and analyzes the sustainability aspect and contributions for environmental applications. The review also discusses the advantages and disadvantages of current approaches and proposes potential waste aerogels and applications.
WASTE AND BIOMASS VALORIZATION
(2022)
Article
Chemistry, Physical
Tuan V. Vu, Sepideh Razavi, Dimitrios Papavassiliou
Summary: The study showed that when only surfactants were present, compression led to expulsion of surfactant molecules to the water phase. Compression of an interface laden with Janus particles resulted in interface buckling, while the total interfacial area remained constant. The presence of Janus particles caused buckling even when surfactants were present, leading to higher levels of interface deformation.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Multidisciplinary Sciences
Zhongxin Chen, Jingting Song, Rongrong Zhang, Runlai Li, Qikun Hu, Pingping Wei, Shibo Xi, Xin Zhou, Phuc T. T. Nguyen, Hai M. Duong, Poh Seng Lee, Xiaoxu Zhao, Ming Joo Koh, Ning Yan, Kian Ping Loh
Summary: In this study, a flow chemistry approach was used to overcome the productivity bottleneck of single atom catalysts (SACs) in liquid-phase heterogeneous catalysis. The integration of Pt1-MoS2 SAC in a bench-top flow reactor resulted in a record productivity of multifunctional anilines, highlighting the potential of flow chemistry in increasing conversion rates and productivity of SACs.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Thao X. D. Nguyen, Sepideh Razavi, Dimitrios V. Papavassiliou
Summary: The effects of surface-active nanoparticles and surfactants on the behavior of oil-water interfaces in shear flow were investigated. It was found that the addition of surfactants reduced the slip between water and oil droplets, leading to greater displacement of the droplets. Surfactant molecules tended to concentrate towards the rear side of the droplets. The presence of nanoparticles slowed down droplet migration. However, when both surfactants and nanoparticles were present, the migration speed of the droplets increased compared to bare oil.
JOURNAL OF PHYSICAL CHEMISTRY B
(2022)
Article
Chemistry, Multidisciplinary
Elton L. Correia, Nick Brown, Aanahita Ervin, Dimitrios Papavassiliou, Sepideh Razavi
Summary: The presence of contamination, such as dodecanol (LOH), in sodium dodecyl sulfate (SDS) solutions significantly affects interfacial properties. The addition of an electrolyte can lead to misinterpretation of surface purity based on surface tension isotherms. This study estimated the amount of dodecanol in SDS solutions and predicted the viscoelasticity of surfactant-laden surfaces using a rheological model.
Article
Multidisciplinary Sciences
Oanh L. Pham, Samuel E. Feher, Quoc T. Nguyen, Dimitrios Papavassiliou
Summary: The stress distribution along the trajectories of passive particles released in turbulent flow was computed using Lagrangian methods and direct numerical simulations. It was observed that proteins experienced damaging stress even when the average applied stress was within a safe operating regime.
Article
Engineering, Chemical
Vi T. Nguyen, Ngoc H. Pham, Dimitrios V. Papavassiliou
Summary: This study examined the relationship between velocity magnitude distribution and pore size distribution in different porous media. The results showed that both velocity magnitude and pore size followed the same distribution pattern. This finding has implications for predicting velocity distribution in porous media and controlling velocity by manipulating pore structure.
Article
Biochemistry & Molecular Biology
Xue Yang Goh, Ren Hong Ong, Phuc T. T. Nguyen, Tianliang Bai, Dave Aw, Tian Li, Luon Tan Nguyen, Hai M. Duong
Summary: A novel and environmentally friendly approach to aluminum-based aerogels using aluminum waste is proposed. The aluminum-based aerogels produced have low density, high porosity, low thermal conductivity, high-temperature resistance, and good oil absorption properties. This study shows that aluminum-based aerogels have potential in thermal insulation and oil absorption applications.
Review
Physics, Fluids & Plasmas
Mesude Avci, Edgar A. O'Rear, Kylie M. Foster, Dimitrios Papavassiliou
Summary: Mechanical circulatory support (MCS) devices are designed to meet the functional needs of organs and clinical hemocompability criteria. The long-term use of MCS devices can lead to critical complications such as thrombosis, anemia, and gastrointestinal bleeding. Damage to red blood cells (RBCs) is a major issue in the design and development of these systems.
