Article
Materials Science, Composites
Zaiwei Li, Long-yuan Li
Summary: This paper presents a simple approach for calculating the effective electrical conductivity of carbon nanotubes-reinforced two-phase composite materials. The approach takes into account the effect of percolation threshold by modifying the traditional effective medium approximation. The predicted electrical conductivity is validated using published experimental results.
COMPOSITES COMMUNICATIONS
(2022)
Article
Materials Science, Composites
Alexandr Blokhin, Roman Stolyarov, Igor Burmistrov, Nikolay Gorshkov, Evgeny Kolesnikov, Viktor Yagubov, Alexey Tkachev, Igor Zaytsev, Dmitry Tarov, Evgeny Galunin, Peter Offor, Nikolay Kiselev
Summary: A highly electrical conductive multi-walled carbon nanotubes based polymer composite was fabricated by iodine doping, resulting in a significant increase in electrical conductivity of the materials. The increase in conductivity was mainly attributed to the addition of MWCNTs and the effect of iodine treatment on the composites.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Characterization & Testing
Gu-Hyeok Kang, Myungsoo Kim, Young-Bin Park
Summary: The study suggests that a GB-CNT/PA6 multiscale hybrid composite can be used to create a network structure with controllable electrical conductivity, making it a promising material for practical applications. The paper introduces a new method for controlling electrical conductivity by creating a segregated network morphology (SNM) using a GB-CNT/PA6 composite. The addition of GB reduces the required CNT concentration, making the process more economical, and the SNM approach leads to a significant increase in electrical conductivity.
Article
Engineering, Chemical
Saeed Dolatshah, Shervin Ahmadi, Amir Ershad Langroodi, Aida Alavi
Summary: The effects of two chain extenders on the performance of PET/CNT nanocomposites were investigated, and it was found that the chain extenders could improve the rheological behavior, thermal characteristics, and crystallization rate of PET, and also affect the electrical properties of the nanocomposites.
POLYMER ENGINEERING AND SCIENCE
(2022)
Article
Engineering, Chemical
Moacy P. da SiIva, Shirley N. Cavalcanti, Amanda M. Alves, Daniel M. G. Freitas, Pankaj Agrawal, Eudesio O. Vilar, Tomas. J. A. de Melo
Summary: A new type of conductive polymer composites was developed in this study, where a percolated network was found using oscillatory rheology analysis, with the electrical percolation threshold observed to be higher than the rheological percolation threshold. The four-point probe method proved to be effective in measuring electrical conductivity and predicting the percolation threshold for the composites.
POLYMER ENGINEERING AND SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Yasser Zare, Kyong Yop Rhee, Soo-Jin Park
Summary: This study presents a two-stage simulation to investigate the tensile strength of polymer systems reinforced with carbon nanotubes (CNT). It explores the mechanical percolation onset and networking of the interphase zone. The results show that the strength of the nanocomposites is influenced by the interphase properties and the dimensions of the CNTs.
Article
Chemistry, Multidisciplinary
M. Haghgoo, R. Ansari, M. K. Hassanzadeh-Aghdam
Summary: The study successfully predicted the electrical resistivity and percolation threshold of a hybrid nanocomposite system comprising carbon black and carbon nanotube using a two-step analytical model based on percolation network model and electron tunneling theory. The results showed that high alignment leads to a significant decrease in percolation threshold, while a low volume fraction of CB results in degraded percolation and overall conductivity.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Materials Science, Composites
Joyita Banerjee, Sreenivas Kummara, Ajay S. Panwar, Kingsuk Mukhopadhyay, Arvind K. Saxena, Arup R. Bhattacharyya
Summary: Melt-mixing was employed to prepare multiwall carbon nanotubes (MWCNTs) based polypropylene (PP) composites, and morphological, rheological, and electrical conductivity measurements indicated the influence of MWCNTs agglomerate structure on the properties of the composites.
POLYMER COMPOSITES
(2021)
Article
Materials Science, Composites
I. Y. Forero-Sandoval, F. Cervantes-Alvarez, J. A. Ramirez-Rincon, J. D. Macias, N. W. Pech-May, J. Ordonez-Miranda, J. J. Alvarado-Gil
Summary: The research shows that thermal and electrical conductivities of composite materials increase with filler concentration, while emissivity decreases. The percolation thresholds of these properties vary at different volume fractions, indicating the effectiveness of the percolation phenomenon in modifying the physical properties of particulate composites.
APPLIED COMPOSITE MATERIALS
(2021)
Article
Thermodynamics
Manuela Alzate, Oscar Gamba, Carlos Daza, Alexander Santamaria, Jaime Gallego
Summary: Nanomaterials and nanocomposites have become important in science and technology. Thermogravimetric analysis is a powerful technique for characterizing iron-carbon nanotubes as hybrid materials. It can determine the dispersion and size of iron particles and correlate with other characterization methods.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Chemistry, Physical
Hyunjin Kim, Hyejin Yang, Suriyakumar Dasarathan, Doohun Kim, Joong Tark Han
Summary: This study presents a method to enhance the electrical performance of CNT films by controlling the wettability of LMWCNT films and the electrical conductivity of the Cu plating solution. Thermal deoxygenation was used to modify the CNT surface, providing high conductivity and hydrophilicity for uniform Cu electrodeposition in an aqueous electrolyte. The results show that Cu nucleates from inside the CNT film and grows on the surface, forming a densely packed CNT-Cu composite.
Article
Materials Science, Composites
Ashish Kaushal, Vishal Singh
Summary: In this study, the mechanical, DC conductivity, and electromagnetic interference (EMI) shielding properties of multiwalled carbon nanotubes (MWCNTs) and carbon fiber reinforced polypropylene (CNC) nanocomposites were investigated. The results showed that the combination of CF and MWCNT improved the tensile strength and modulus of the nanocomposites, and the percolation behavior improved the DC electrical conductivity. The CNC nanocomposites exhibited high EMI shielding effectiveness in the X-band for a 2 mm thick sample, and efforts have been made to develop a compatible EMI shielding material using multiple fillers.
POLYMER COMPOSITES
(2022)
Article
Materials Science, Composites
Mojtaba Haghgoo, Reza Ansari, Mohammad K. Hassanzadeh-Aghdam, Mohammad Nankali
Summary: This study investigates the temperature-dependent piezoresistivity of hybrid carbon black/carbon nanotube nanocomposites using a Monte Carlo simulation approach. The results show that the aspect ratio and dispersion state affect the percolation threshold and resistivity, and the piezoresistivity increases with the decrease in the Poisson's ratio and intrinsic electrical conductivity.
JOURNAL OF COMPOSITE MATERIALS
(2022)
Article
Chemistry, Physical
Shaohua Chen, Qiang Liu, Larissa Gorbatikh, David Seveno
Summary: The formation of covalently bonded inter-graphene junctions is crucial for significantly improving the thermal conductivity of graphene-reinforced polymer composites.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Materials Science, Multidisciplinary
Muhammad A. Munawar, Dirk W. Schubert
Summary: Using electrospinning, highly oriented conductive nanofibers were produced by increasing the filler proportion, leading to higher conductivity in ECFCs. A calculation method was developed to determine the conductivity and electrical percolation thresholds of nanofibers. Annealing process increased conductive channels within ECFCs, enhancing conductivity and reducing percolation thresholds.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Materials Science, Composites
Maryam Afshar, Jalil Morshedian, Shervin Ahmadi
POLYMER COMPOSITES
(2019)
Article
Engineering, Manufacturing
Maryam Zabihzadeh Khajavi, Reza Mohammadi, Hervin Ahmadi, Mehdi Farhoodi, Abdol-Samad Abedi
PACKAGING TECHNOLOGY AND SCIENCE
(2019)
Article
Chemistry, Applied
Nargess Pourmohammad, Majid M. Heravi, Shervin Ahmadi, Tayebe Hosseinnejad
APPLIED ORGANOMETALLIC CHEMISTRY
(2019)
Article
Chemistry, Multidisciplinary
Samahe Sadjadi, Masoumeh Malmir, Nargess Pourmohammad, Shervin Ahmadi, Majid M. Heravi
RESEARCH ON CHEMICAL INTERMEDIATES
(2019)
Review
Food Science & Technology
Maryam Zabihzadeh Khajavi, Reza Mohammadi, Shervin Ahmadi, Mehdi Farhoodi, Mojtaba Yousefi
TRENDS IN FOOD SCIENCE & TECHNOLOGY
(2019)
Article
Food Science & Technology
Maryam Zabihzadeh Khajavi, Shervin Ahmadi, Abdol-Samad Abedi, Reza Mohammadi, Mehdi Farhoodi
FOOD PACKAGING AND SHELF LIFE
(2019)
Review
Engineering, Chemical
Mohammad Mohammadi, Shervin Ahmadi, Ismail Ghasemi, Mohammadreza Rahnama
POLYMER ENGINEERING AND SCIENCE
(2019)
Article
Polymer Science
Mohammad Mohammadi, Shervin Ahmadi, Ismail Ghasemi
Article
Food Science & Technology
Rashid Gholami, Ebrahim Ahmadi, Shervin Ahmadi
FOOD SCIENCE & NUTRITION
(2020)
Article
Polymer Science
Saeed Dolatshah, Shervin Ahmadi, Amir Ershad-Langroudi, Hedieh Jashni
Summary: This study investigated the synergistic effect of different chain extenders and catalysts on the rheological behavior of PET, finding that a combination of PMDA and PENTA at 1.5% and 0.5% respectively resulted in the best rheological properties for modified PET. Additionally, DBTDL acted as an accelerator for chain extension reaction, improving the rheological properties of PET by increasing the chain extending rate. Thermal properties of modified PET were also studied using differential scanning calorimetry.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Engineering, Chemical
Saeed Dolatshah, Shervin Ahmadi, Amir Ershad Langroodi, Aida Alavi
Summary: The effects of two chain extenders on the performance of PET/CNT nanocomposites were investigated, and it was found that the chain extenders could improve the rheological behavior, thermal characteristics, and crystallization rate of PET, and also affect the electrical properties of the nanocomposites.
POLYMER ENGINEERING AND SCIENCE
(2022)
Article
Mechanics
Milad Hadaeghnia, Shervin Ahmadi, Ismaeil Ghasemi, Paula M. M. Wood-Adams
Summary: We investigated the influence of minor phase rheological properties and compatibilizer on the phase morphology and graphene 3D structure in PA6/POE blends. It was found that in blends with low viscosity POE, graphene dispersed better and localized at the interface. In blends with high viscosity POE and poor graphene dispersion, large graphene aggregates were observed inside the POE phase with less interfacial coverage. Interestingly, graphene induced co-continuous morphology and electrical and rheological percolation in both systems, although at a lower graphene content for the low viscosity system. Morphological observations suggested that sheet formation dominated the co-continuous morphology in the low viscosity system, while coalescence between moderately elongated domains dominated in the high viscosity system. Fractal analysis of the graphene 3D network showed a higher degree of connectivity in the low viscosity system. The addition of compatibilizer did not improve the electrical properties in the high viscosity system.
JOURNAL OF RHEOLOGY
(2023)
Article
Engineering, Environmental
Farnam Manavi, Mohammad Reza Allahgoli Ghasri, Shervin Ahmadi, Sima Habibi
Summary: This study successfully reduced the BOD/COD levels in tannery wastewater by synthesizing a CuO-PP-MAH nanocomposite. The nanocomposite demonstrated stable, high surface area, high efficiency, and regenerative properties, while adhering to the principles of green chemistry. This research provides a viable approach for addressing the issue of tannery wastewater treatment.
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2023)
Article
Public, Environmental & Occupational Health
[Anonymous]
JOURNAL OF HEALTH AND SAFETY AT WORK
(2019)
Article
Acoustics
Roohalah Hajizadeh, Ali Khayanin, Mohammad Barmar, Ahmad Jonidi Jafari, Somayeh Farhang Dehghan
SOUND AND VIBRATION
(2019)