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
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
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
Chemistry, Physical
T. Khan, M. S. Irfan, M. Ali, Y. Dong, S. Ramakrishna, R. Umer
Summary: Electrically conductive polypropylene nanocomposites containing carbon-based nanofillers are widely used in various applications. Achieving low percolation threshold is crucial for mechanical properties, optical transparency, and cost-effectiveness. Different parameters and post-processing techniques influence electrical conductivity and percolation threshold.
Article
Chemistry, Physical
De-Yang Wang, Zhen-Hua Tang, Pei Huang, Yuan-Qing Li, Shao-Yun Fu
Summary: A numerical model is proposed in this study to predict the electrical behavior of CNT/polymer composites (CPCs), taking into account both the length non-uniformity and waviness of CNTs. The results show that these two factors have significant effects on the electrical behavior of CPCs.
Article
Polymer Science
Hangzhen Zhang, Kun Wu, Enxiang Jiao, Bing Chen, Jun Shi, Mangeng Lu
Summary: In this study, hydrogen bonds were formed between carbon nitride nanosheets (CNNS) and the PVA matrix, enhancing the thermal and mechanical properties of the composite materials. The thermal conductivity of CNNS/PVA composites was significantly improved compared to pure PVA film, and showed comparable performance to traditional highly thermally conductive polymer composites.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Engineering, Chemical
Junghee Park, Wan-woo Jeon, Hyunwook Choo
Summary: The study found that there is a percolation threshold around 20% carbon content dividing mixtures into distinct response groups. At low stress levels, the effects of pore fluid type and concentration on K-p can be neglected. However, at high stress levels, K-p increases with the increasing ionic concentration of pore water.
Article
Materials Science, Multidisciplinary
Yasser Zare, Nima Gharib, Kyong Yop Rhee
Summary: The effects of tunneling parts and interphase on the conductivity of graphene-filled polymer materials were considered in this study. A developed methodology for conductivity prediction was proposed, taking into account the tunneling mechanism and the parameters such as graphene content, dimensions, interphase thickness, and percolation inception. The model was validated through experimental results, showing that big and thin nanosheets along with a dense interphase can improve the conductivity of samples.
Article
Materials Science, Ceramics
C. Lopez-Pernia, C. Munoz-Ferreiro, R. Moriche, A. Morales-Rodriguez, A. Gallardo-Lopez, R. Poyato
Summary: 3 mol% yttria tetragonal zirconia polycrystal (3YTZP) composites with orthotropic or isotropic microstructures were successfully prepared by incorporating few layer graphene (FLG) or exfoliated graphene nanoplatelets (e-GNP) as fillers. The electrical conductivity of the composites was investigated in a wide range of contents, both perpendicular and parallel to the pressing axis during spark plasma sintering (SPS). Isotropic e-GNP composites showed excellent electrical conductivity at high e-GNP contents (sigma(perpendicular to)similar to 3200 S/m and sigma(//) similar to 1900 S/m for 20 vol% e-GNP), while highly anisotropic FLG composites exhibited optimal electrical performance with high conductivity at low contents (sigma(perpendicular to) similar to 680 S/m for 5 vol%) and outstanding conductivity at high contents (sigma(perpendicular to) similar to 4000 S/m for 20 vol%).
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Polymer Science
Chao Liu, Wei Wu, Dietmar Drummer, Yi Wang, Qiming Chen, Xingrong Liu, Kevin Schneider
Summary: The study investigates the thermal properties of TPU composites incorporated with EG and MLG fillers. It reveals that high-loading TPU composites exhibit exceptional thermal conductivity, with a thermal conductivity enhancement of 3450% and a 115% enhancement per 1 wt% filler. The thermal conductive mechanism is proposed based on morphology and thermal contact resistance analyses, showing the potential application of EG and MLG in high-performance TIMs.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Daria Strugova, Jose Carlos Ferreira, Eric David, Nicole R. Demarquette
Summary: This study investigated the effect of PP crystallization on its electrical conductivity and electrical percolation threshold in a blend with PS containing MWCNTs. By utilizing a two-step approach and specific thermal treatments, ultra-low PT values were achieved for the PP/PS/MWCNTs system, attributed to volume exclusion of PP crystals without altering the blend morphology.
Article
Materials Science, Multidisciplinary
Rafael B. Nuernberg, Norma Maria P. Machado, Mohammed Malki, Muriel Neyret
Summary: This study aims to evaluate the influence of RuO2 particle size on the electrical behavior and percolation threshold of RuO2-glass composites. Experimental results show a transition in the electrical behavior of the composites near the percolation threshold, with low RuO2 content exhibiting ionic conductivity and high RuO2 content showing electronic conductivity. Additionally, the electrical properties of the composites are significantly affected by the size of RuO2 particles.
JOURNAL OF NUCLEAR MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Asghar Aryanfar, Sajed Medlej, Ali Tarhini, S. Reza Damadi, B. Ali R. Tehrani, William A. Goddard
Summary: This study focuses on the thermal conductivity of graphene-based polymer composites, using a percolation-based computational method to predict thermal conductivity and verifying the results through experiments. The research successfully explains the role of particle geometry and density, providing valuable insights for the effective utilization and optimization of graphene flakes in composites.
COMPUTATIONAL MATERIALS SCIENCE
(2021)
Article
Materials Science, Composites
Shengfei Hu, Bingfeng Xu, Yang Zhao, Xudong Fu, Qingting Liu, Rong Zhang
Summary: Conductive and thermal conductive polymer composites with segregated network structures were prepared by the Pickering emulsion method. The inclusion of carbon nanotubes (CNTs) as bridges improved the conductivity and thermal conductivity of the composites. This study provides a convenient and time-saving approach for the study of segregated structural thermally conductive composites.
COMPOSITES SCIENCE AND TECHNOLOGY
(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, Composites
B. T. S. Ramanujam, S. Radhakrishnan, S. D. Deshpande
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
(2017)
Article
Polymer Science
S. Radhakrishnan, M. B. Kulkarni, Nikesh Samarth, P. A. Mahanwar
JOURNAL OF APPLIED POLYMER SCIENCE
(2016)
Article
Materials Science, Composites
B. T. S. Ramanujam, S. Radhakrishnan, S. D. Deshpande
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
(2017)
Article
Materials Science, Composites
B. T. S. Ramanujam, S. Radhakrishnan
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
(2015)
Article
Materials Science, Multidisciplinary
M. B. Kulkarni, S. Radhakrishnan, N. Samarth, P. A. Mahanwar
MATERIALS RESEARCH EXPRESS
(2019)
Article
Materials Science, Multidisciplinary
I. Sancheti, P. Katkar, S. Thorat, S. Radhakrishnan, M. B. Kulkarni
MATERIALS RESEARCH EXPRESS
(2019)
Article
Polymer Science
B. T. S. Ramanujam, Parag Adhyapak, S. Radhakrishnan, R. Marimuthu
Summary: CNF dispersed better in PVDF composites synthesized using DMAc solvent, showing higher electrical conductivity, higher thermal degradation temperature, and better storage modulus at low temperature compared to those synthesized using DMF.
Article
Materials Science, Composites
Himangi Neve, Swapnil Thorat, Subramaniam Radhakrishnan
Summary: In this study, commercially available recycled polypropylene (R-PP) and recycled bottle grade polyethylene terephthalate (R-PET) were melt compounded in different proportions of R-PET. The melt flow behavior, crystallization, and structure development of these blends were investigated. The results showed that the viscosity of the blends varied with the content of R-PET, and the crystallization of both polymers was affected by the presence of the other. These findings have important implications for improving the properties of the blends.
PROGRESS IN RUBBER PLASTICS AND RECYCLING TECHNOLOGY
(2023)
Review
Energy & Fuels
Bhushan Hajare, Dinesh S. Bhutada, A. M. Khare, S. Radhakrishnan, M. B. Kulkarni
Summary: In recent years, research has focused on developing polymers from agricultural waste, with jackfruit waste identified as a potential source. Jackfruit waste, which includes seed, peel, and latex, is rich in cellulose and starch that can be converted into high-value products. The resulting value-added polymers have applications in packaging, textiles, and biomedical engineering, offering mechanical properties, thermal stability, and biodegradability as alternatives to petroleum-based polymers. With the large volume of jackfruit production, this waste can be utilized to create new polymeric materials, contributing to circular economy practices and environmental protection.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Proceedings Paper
Materials Science, Multidisciplinary
Jui J. Joglekar, Y. S. Munde, A. L. Jadhav, D. S. Bhutada, S. Radhakrishnan, M. B. Kulkarni
Summary: The use of natural filler and fiber materials as alternatives to synthetic materials for reinforcing polymers is becoming more popular due to their environmental friendliness, abundance, renewability, and cost-effectiveness. In this study, waste from the pomelo fruit peel was used as a particulate filler with LDPE, and surface treatment of the filler led to significant improvements in mechanical properties at higher filler loading.
MATERIALS TODAY-PROCEEDINGS
(2021)
Proceedings Paper
Materials Science, Multidisciplinary
Jui J. Joglekar, Y. S. Munde, A. L. Jadhav, D. S. Bhutada, S. Radhakrishnan, M. B. Kulkarni
Summary: Thermoplastic PVC matrix was reinforced with waste fiber portion of Citrus Maxima (CM) fruit to form composites. Increasing fiber loading led to significant improvements in Tensile Modulus, Breaking Strength, and Yield Stress. Uniform distribution of fibers in PVC matrix resulted in the formation of cross-ply structure and enhanced mechanical properties.
MATERIALS TODAY-PROCEEDINGS
(2021)
Article
Chemistry, Applied
P. Katkar, I Sancheti, D. S. Bhutada, A. Rajput, S. Thorat, S. Radhakrishnan, A. Sabnis, P. A. Mahanwar, M. B. Kulkarni
SURFACE COATINGS INTERNATIONAL
(2020)
Article
Nanoscience & Nanotechnology
S. Radhakrishnan, Vaibhav Deshmukh, R. R. Kulkarni
JOURNAL OF NANOFLUIDS
(2018)
Article
Nanoscience & Nanotechnology
Vaibhav N. Deshmukh, S. Radhakrishnan, Ratnakar R. Kulkarni
JOURNAL OF NANOFLUIDS
(2017)