Article
Materials Science, Composites
Abdessamad Belhaouzi, Souad Zyade, Youssef Halimi, Tarfaoui Mostapha, Marwane Rouway, Mohamed Tahiri
Summary: The study aims to improve the properties of building materials by adding nanoparticles for enhanced energy efficiency. Both numerical and analytical modeling methods are offered to analyze the thermal conductivity and mechanical property of composite materials. The results show that the addition of nanoparticles improves the thermomechanical behavior of building materials and has potential applications in various fields.
POLYMER COMPOSITES
(2023)
Article
Thermodynamics
Kelechi Ogbuanu, R. Valery Roy
Summary: This paper discusses the numerical determination of the effective thermal conductivity of 2D, two-phase composite materials using digital images and computer vision techniques. Key microstructural data, such as spatial distribution and volume fractions, are extracted and used to calculate the effective thermal conductivities. Different fitting methods are applied based on the shapes and complexities of the inclusions. The proposed scheme is validated through accurate results obtained under various conditions.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Materials Science, Multidisciplinary
Ying Wang, Miao Qi, Guangtao Chang, Ruoxin Li
Summary: A novel approach to prepare highly conductive thermal polyurethane composite coatings with dopamine-modified conductive fillers was reported in this study. Graphene oxide and carbon nanotube were found to form a bridge-like structure to build more heat conduction channels, leading to better thermal conductivity.
Article
Chemistry, Physical
Shigeru Katsuyama, Kohei Kamoya
Summary: A sintered composite made of p-type Si0.99B0.01 and insulative SiO2 particles was studied for its thermoelectric properties. The electrical conductivity and thermal conductivity of the composite were found to change with the volume fraction of Si0.99B0.01, showing specific trends at different stages of volume fraction increase.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Thermodynamics
Fang He, Yu Wang, Wei Zheng, Ju-Ying Wu, Yu-Hong Huang
Summary: This paper proposes a thermal conductivity model for thermal insulation composites filled with aerogel particles, and verifies the accuracy of the model through experiments.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Electrochemistry
Weiyu Li, Daniel M. Tartakovsky
Summary: This study presents a homogenized thermal model for a spherical active particle coated with a carbon binder domain (CBD) immersed in a liquid electrolyte. The model replaces the composite particle with a homogeneous particle with equivalent thermal conductivity, preserving the amount of released heat at the solid/electrolyte interface. This analytical expression for thermal conductivity can be readily integrated into thermal simulations, providing a means to account for CBD in battery design and management models.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Polymer Science
Takuro Itaoka, Ryohei Matsubayashi, Masashi Haruki
Summary: The orientation and distribution of filler in Fe3O4@hBN/PI composite sheets were controlled by magnetic field treatment (MFT) to improve the effective thermal conductivity (TC) in the out-of-plane direction. Filler chain structures aligned with the magnetic field in the precursor solution. The effective TC of Fe3O4@hBN/PI after MFT was significantly higher than that of pristine hBN/PI, especially when positioned near a one-sided magnet.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Taoqing Huang, Xinyu Zhang, Tian Wang, Honggang Zhang, Yongwei Li, Hua Bao, Min Chen, Limin Wu
Summary: This study presents a novel surface modification strategy using BN nanocrystals to enhance the vertical thermal conductivity of BN-embedded composites. The self-modified nanointerface between BN and the polymer matrix improves the phonon scattering issue and achieves a significantly higher through-plane thermal conductivity. The excellent thermal conductivity has been verified by theoretical calculations and experimental tests, making it a promising approach to develop high-performance composites.
NANO-MICRO LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Bichuan Chi, Yan Yao, Suping Cui, Xiaodong Jin
Summary: In this study, a form-stable phase change material (PCM) TD/EG-GO was prepared by introducing tetradecanol (TD) into expanded graphite (EG) and coating it with graphene oxide (GO) through electrostatic self-assembly. The composite PCM showed improved thermal stability and thermal conductivity compared to the uncoated PCM, with the GO-coated structure effectively preventing TD leakage.
Article
Chemistry, Physical
Cheng'e Yue, Liwei Zhao, Lizhu Guan, Xiaorui Zhang, Chunyan Qu, Dezhi Wang, Ling Weng
Summary: In this study, a self-repairing thermally conductive composite with good electrical insulation, high thermal conductivity, high healing efficiency, and excellent mechanical strength was designed and prepared. It can solve the heat dissipation problem of integrated electronic devices and extend their service life, reducing electronic waste.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Chengcheng Shen, Qiang Sheng, Haifeng Zhao
Summary: This paper predicts the effective thermal conductivity of thermal insulation composite materials using a convolutional neural network (CNN). It models the microstructure of the composites using digital images and uses the Lattice Boltzmann Method (LBM) to predict the conductivities. The CNN model is trained and validated using the microstructural images and the results are compared with experiments, analytical models, and computational methods. The study demonstrates the potential of machine learning to advance materials science and accelerate development of materials with desired properties.
MECHANICS OF MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Xiao Chen, Piao Cheng, Zhaodi Tang, Xiaoliang Xu, Hongyi Gao, Ge Wang
Summary: Phase change materials offer a way to store renewable thermal energy, with carbon-based composite PCMs showing potential for enhanced performance. However, challenges remain in terms of improving efficiency and expanding applications, highlighting opportunities for future advancements.
Article
Energy & Fuels
Heegyeom Jeon, Jeong Ho Na, Yong Seok Kim, Seung-Keun Park, Youngjae Yoo
Summary: In this study, wave-selective emitter coolers were fabricated using glass bubbles and barium sulfate, and polyacrylonitrile nanofibers were electrospun on these coolers. The optical properties and cooling power were analyzed based on the ratio of glass bubbles and barium sulfate, as well as the electrospinning conditions. The cooler with the added electrospinning layer showed higher reflectivity and cooling power compared to the cooler containing only polydimethylsiloxane/glass bubbles and barium sulfate. This study improves the performance of previously studied passive radiative cooling.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Energy & Fuels
Mohamed Moussa El Idi, Mustapha Karkri, Manel Kraiem
Summary: In this study, a paraffin-metal foam composite was prepared using the vacuum impregnation method, with aluminum and nickel foams. The thermal behavior of these composites for the thermal management of Li-ion batteries was characterized, showing a significant impact of the thermal conductivity of the metal foam and a minor impact of pore size on the effective thermal conductivity.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Physics, Applied
Yingbo Li, Yanbin Ma, Cong Liu, Xingyi Zhang, Huadong Yong, You-He Zhou
Summary: In this study, high-speed fluorescent thermal imaging technique was used to monitor heat diffusion of YBCO CC based on EuTFC, showing excellent photostability and temperature dependence. Four theoretical models of thermal conductivity were presented, with the Maxwell's equivalent model showing the best agreement with experimental results in reproducing the transient heat conduction process.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Applied
A. Ramos-Corona, R. Rangel, J. Espino, J. Lara, R. Nunez, P. Bartolo-Perez, J. J. Alvarado-Gil
Summary: This study reports the degradation of lignin molecules using nitrogen-doped ZnO photocatalysts supported on graphene oxide. Different nitrogen precursors were used to achieve nitrogen doping in ZnO, resulting in variations in doping levels and photocatalytic behavior. Structural and physicochemical analyses revealed significant differences in the samples' properties, attributed to the choice of nitrogen precursor. The photocatalytic activity tests showed that lignin degradation under UV irradiation was 80%, while degradation under visible energy was 61%.
Article
Thermodynamics
Santiago Alvarez-Guerrero, Jose Ordonez-Miranda, Romeo de Coss, Juan Jose Alvarado-Gil
Summary: The effective thermal conductivity of composites made of VO2 (SiO2) spherical particles dispersed in a SiO2 (VO2) matrix was studied. It was found that the thermal conductivity of VO2/SiO2 composites increases with particle size, while the SiO2/VO2 composites are relatively independent of SiO2 particle size. At the transition temperature of VO2, the effective thermal conductivity of VO2/SiO2 composites increases significantly, while that of SiO2/VO2 composites decreases.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Nanoscience & Nanotechnology
A. Ramos-Corona, R. Rangel, J. Lara, R. Trejo-Tzab, P. Bartolo, J. J. Alvarado-Gil
Summary: In this study, CdS-N/GO photocatalysts were prepared by nitrogen-doping of cadmium sulfide nanostructured compounds and supported on graphene oxide sheets, and their performance in the degradation of lignin and methylene blue was tested. The results showed that the CdS-N/GO compound exhibited outstanding photocatalytic activity in the visible light region and good stability.
Article
Chemistry, Physical
Suraju Olawale Kasali, Jose Ordonez-Miranda, Kamal Alaili, Karl Joulain
Summary: This theoretical study optimized the thermal rectification of spherical and cylindrical conductive thermal diodes operating with phase-change materials, showing that geometry affects heat flows and temperature profiles but not rectification factor significantly. Optimal rectification factors of 63.5% and 63.2% were obtained for diodes operating between VO2 and polyethylene, and further enhancement is possible with higher contrast thermal conductivity PCM. These findings are valuable for developing PCMs to optimize rectification of conductive heat flows with different geometries.
ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES
(2022)
Article
Food Science & Technology
Claudia Hernandez-Aguilar, Mariana Palma-Tenango, Ruben San Miguel-Chavez, Arturo Dominguez-Pacheco, Marcos Soto-Hernandez, Maria del Carmen Valderrama Bravo, Rumen Ivanov, Jose Ordonez-Miranda
Summary: The study shows that UV-C radiation can alter the content of phenolic compounds in breads added with turmeric, with significant differences observed based on exposure time and turmeric concentration. Degradation of phenolic acids was seen at 30 and 60 seconds of radiation, while the highest concentrations of phenolic acids were found in breads added with 10% turmeric under 15-second radiation.
JOURNAL OF FOOD MEASUREMENT AND CHARACTERIZATION
(2022)
Article
Thermodynamics
Santiago Alvarez-Guerrero, Jose Ordonez-Miranda, Romeo de Coss, Juan Jose Alvarado-Gil
Summary: This study investigates the thermoelectric performance of composite materials containing VO2 nanoparticles embedded in a Bi0.5Sb1.5Te3 matrix. The results show that at temperatures higher than 350 K, VO2 nanoparticles can significantly enhance the electrical conductivity and thermoelectric efficiency of the matrix, while the Seebeck coefficient remains constant. This provides an effective approach to improve the thermoelectric efficiency of Bi0.5Sb1.5Te3 materials.
INTERNATIONAL JOURNAL OF THERMOPHYSICS
(2022)
Article
Physics, Applied
D. K. Markushev, D. D. Markushev, S. M. Aleksic, D. S. Pantic, S. P. Galovic, D. V. Lukic, J. Ordonez-Miranda
Summary: This study investigates the reduction of the influence of photogenerated charge carriers in periodically illuminated thin silicon membranes. It is found that the deposition of a titanium dioxide thin film can increase the thermoelastic component of the photoacoustic signal and restore the flexibility of the membrane. The effect is more significant in thinner membranes.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Roman Anufriev, Yunhui Wu, Jose Ordonez-Miranda, Masahiro Nomura
Summary: This study investigates the thermal conductivity of SiC nanostructures and finds that it is lower than that in bulk materials and scales proportionally with the narrowest dimension of the structures. The observed suppression of heat conduction is linked to surface phonon scattering, which limits the phonon mean free path and reduces the thermal conductivity.
NPG ASIA MATERIALS
(2022)
Article
Physics, Applied
I. Y. Forero-Sandoval, A. P. Franco-Bacca, F. Cervantes-Alvarez, C. L. Gomez-Heredia, J. A. Ramirez-Rincon, J. Ordonez-Miranda, J. J. Alvarado-Gil
Summary: Electrical percolation and thermal percolation exhibit different behaviors in two-phase materials. Researchers have conducted critical analysis and applied theoretical models to study the thermal and electrical properties of two-phase materials, focusing on the characteristics of fillers, their connectivity with the matrix, and the role of thermal resistance. Future directions to enhance thermal conductivity and observe significant thermal percolation effects are also discussed.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Lilian Perez Delgado, Adriana Paola Franco-Bacca, Fernando Cervantes-Alvarez, Elizabeth Ortiz-Vazquez, Jesus Manuel Ramon-Sierra, Victor Rejon, Maria Leopoldina Aguirre-Macedo, Juan Jose Alvarado-Gil, Geonel Rodriguez-Gattorno
Summary: Through scientific innovations, smart materials interact and respond to changes in the environment, shaping the future of technology. Component selection, synthesis procedures, and functional agents are crucial for a profitable and sustainable industry. This study investigates how reaction time, temperature, and surface stabilizer concentration affect the thermal and bactericidal response of a cotton-based fabric coated with silver nanoparticles. The results provide insights into the relationship between AgNPs properties and their functional responses, enabling the formulation of application-modulated fabrics.
Article
Materials Science, Multidisciplinary
Mareny Guadalupe Fernandez-Olaya, Adriana Paola Franco-Bacca, Pablo Genaro Martinez-Torres, Miguel Angel Ruiz-Gomez, David Meneses-Rodriguez, Roberto Li Voti, Juan Jose Alvarado-Gil
Summary: In materials science, understanding the thermal properties of thin films on thick substrates is crucial for determining their role in the overall physical properties of the system. However, it is challenging to determine the thermal properties of thin films due to the difficulty in isolating their influence from the substrate. This study presents a simple analytical methodology, based on the photoacoustic technique, for accurately characterizing the thermal properties of micrometric polymeric thin films on thick substrates.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Jose Ordonez-Miranda, Roman Anufriev, Masahiro Nomura, Sebastian Volz
Summary: The existence of a net heat current of conductive thermal waves is demonstrated even in the absence of a mean temperature gradient. This effect, called heat shuttling, is generated by the temperature-dependent thermal conductivity of materials excited with a thermal excitation periodically modulated in time. This modulation gives rise to a heat current that enhances heat transport when the thermal conductivity increases with temperature. The shutting effect is sensitive to the amplitude of the periodic thermal excitation.
Article
Nanoscience & Nanotechnology
Monica M. Martinez-Garcia, Juan L. Pichardo-Molina, Norberto Arzate-Plata, Juan J. Alvarado-Gil
Summary: A simple method for preparing SERS substrates with gold concave nanocubes of different sizes deposited on aluminum slides is reported in this study. The substrate prepared with 55 nm nanocubes exhibits a higher analytical enhancement factor. The performance of the SERS substrates in detecting thiram in water and tomato juice samples shows high sensitivity.
NANOMATERIALS AND NANOTECHNOLOGY
(2022)
