Article
Chemistry, Physical
E. P. Domashevskaya, S. A. Ivkov, A. Sitnikov, O. Stogney, A. T. Kozakov, A. Nikolsky, K. A. Barkov, N. S. Builov
Summary: The influence of the relative content of the metal component on the phase composition and substructure of (CoFeZr)(x)(MgF2)(100-x) film nanocomposites has been studied. At lower metal component content, the CoFeZr metal alloy is in the X-ray amorphous state, while at higher content, the MgF2 matrix becomes X-ray amorphous and CoFeZr alloy nanocrystals are formed with different structures.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Composites
Mario A. B. S. Nunes, Bruno R. de Matos, Glaura G. Silva, Edson N. Ito, Tomas J. A. de Melo, Guilhermino J. M. Fechine
Summary: The addition of carbon-based fillers in co-continuous polymer blends can lead to improved rheological and electrical properties, with a balance between processability and performance. The proper selection of nanofillers and controlled dispersion can enhance the conductivity levels achieved in the blends.
POLYMER COMPOSITES
(2021)
Article
Materials Science, Composites
Esmail Sharifzadeh, Neda Azimi, Reza Mohammadi
Summary: This study investigates the impact of homogeneously modified (HM) and Janus silica nanoparticles on the thermostimulative shape memory effect in high-density polyethylene/poly(ethylene terephthalate) blend-based polymer nanocomposites. The results demonstrate that the physical/mechanical characteristics of the polymer/polymer interface play a crucial role in defining the shape memory effect. The Janus nanoparticles are synthesized through a two-step desymmetrization process, while a single-step modification procedure is used for homogenous modification. The samples containing Janus nanoparticles exhibit the strongest shape memory effect.
POLYMER COMPOSITES
(2023)
Article
Nanoscience & Nanotechnology
Alexandre Redondo, Nicole Mortensen, Kenza Djeghdi, Daseul Jang, Roberto D. Ortuso, Christoph Weder, LaShanda T. J. Korley, Ullrich Steiner, Ilja Gunkel
Summary: The effects of cellulose nanocrystals (CNCs) on the reinforcement mechanisms of thermoplastic polyurethane (PU) elastomer nanocomposites were studied. It was found that nanocomposite fibers exhibited higher stiffness and strength, while nanocomposite films displayed better mechanical properties at high CNC concentrations.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Mojtaba Mohammadi, Marie-Claude Heuzey, Pierre J. Carreau, Aurelie Taguet
Summary: The morphology and rheological properties of poly(lactic acid) and poly(butylene adipate-co-terephthalate) blends were studied in the presence of cellulose nanocrystals, with the CNCs being highly dispersed after solution casting but agglomerating after melt mixing. This led to a decrease in complex viscosity and storage modulus of the nanocomposites, and prevented droplet coalescence in the blend nanocomposites under shearing at 0.1 s(-1).
Article
Polymer Science
Anda Barkane, Oskars Platnieks, Liga Grase, Sergejs Gaidukovs
Summary: This study investigates the tunable and durable vegetable oil-based UV-curing composite resins. By adding lignocellulosic components such as cellulose nanocrystals, cellulose nanofibres, hemicellulose, and lignin, the thermal stability, thermomechanical properties, transparency, surface morphology, and wettability of the resin can be improved. Strong interaction between the lignocellulosic components and the polymer matrix enhances the thermomechanical properties of the composite. The surface morphology and wettability of the composite can be tuned by the addition of different lignocellulosic components. The effects of different components on the transparency of the resin are also evaluated.
Article
Engineering, Mechanical
Seunghwa Yang
Summary: In this study, the impact of covalent grafting between CNTs and a PET matrix on the interface, interphase, and elasticity of the nanocomposite was investigated. The results show that covalent grafting can improve the transverse modulus and shear modulus of the nanocomposite. Additionally, the elastic modulus of the interphase is always higher than that of the neat PET matrix.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
Elahe Pourakbar, Esmail Sharifzadeh
Summary: In this study, HO Janus (HOJ) micro- and nanoparticles were synthesized through buoyancy-induced desymmetrization process, and their effects on the thermal conductivity of binary polymer blends were investigated. The results showed that the presence of HO micro- and nanoparticles could increase the conduction coefficient of the blends, while their simultaneous presence in both phases had a significantly more impact on the thermal conductivity.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Mahide Betul Ozturkmen, Merve Ozkutlu Demirel, Ozlem Agac, Remzi Ecmel Ece, Yahya Oz
Summary: This study integrates graphene nanoplatelets (GNPs) and carbon nanotubes (CNTs) with a high-temperature curing epoxy resin using three-roll milling, achieving good dispersion of the nanofillers and improving the mechanical, thermal, and electrical properties of the nanocomposites. This method is of great importance for industrial applications, especially in the aerospace sector, as it is scalable and suitable for resins with high curing temperatures.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Alexandre Redondo, Livia K. Bast, Kenza Djeghdi, Martino Airoldi, Daseul Jang, LaShanda T. J. Korley, Ullrich Steiner, Nico Bruns, Ilja Gunkel
Summary: Commodity plastics, such as thermoplastic polyurethanes (PUs), often need reinforcement for commercial use. Cellulose nanocrystals (CNCs) offer a green and scalable solution, but achieving efficient CNC reinforcement of PUs with industrial melt processing is challenging. In this study, a hydrophilic PU and filter paper-sourced CNCs were used to create strong reinforced melt-processed nanocomposite fibers.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Chemistry, Inorganic & Nuclear
Brittany L. Bonnett, Stefan Ilic, Katie Flint, Meng Cai, Xiaozhou Yang, Hannah D. Cornell, Ashleigh Taylor, Amanda J. Morris
Summary: The porphyrinic metal-organic framework PCN-222 shows anisotropic growth behavior, forming nanorods and microrods with controlled aspect ratios. By modulating the concentrations of ligand, modulator, and base, the aspect ratios of microrods can be effectively adjusted. Understanding the growth mechanisms of PCN-222, such as ligand deprotonation and Ostwald ripening, allows for the synthesis of high aspect ratio metal-organic frameworks through acid-base co-modulation methods.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Physical
Jianpeng Zong, Xiaohui Song, Ruoxu Wang, Wenjia Xu, Weiwei Zhou, Shuaibin Li, Yuhua Feng, Hongyu Chen
Summary: By introducing salt solutions, Janus nanostructures can be obtained, and the high concentration of salt solutions affects the interactions of materials, thereby affecting the formation and wetting effect of nanostructures.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Sergey A. Ivkov, Konstantin A. Barkov, Evelina P. Domashevskaya, Elena A. Ganshina, Dmitry L. Goloshchapov, Stanislav V. Ryabtsev, Alexander V. Sitnikov, Pavel V. Seredin
Summary: The purpose of this study was to investigate the impact of variable atomic composition and structural-phase state on the nonlinear transport and magnetic/magneto-optical properties of Co-x(MgF2)(100-x) nanocomposites. Nanocomposite layers with micrometer thickness were grown on glass substrates using ion-beam sputtering technique under argon atmosphere, covering a wide range of compositions (x = 16-59 at.%). By maintaining a low metal content in the nanocomposite, magnesium fluoride remained in the nanocrystalline state, while increasing the metal content resulted in the formation of nanocrystalline cobalt. The resistive percolation threshold value (x(per) = 37 at.%) coincided with the onset of metallic nanocrystal nucleation in the MgF2 dielectric matrix. The maximum absolute value of the negative magnetoresistive effect was 5% at a Co concentration of x = 27 at.% in a magnetic field of 5.5 kG.
APPLIED SCIENCES-BASEL
(2023)
Article
Polymer Science
Joakim Engstrom, Michael S. Reid, Emma E. Brotherton, Eva Malmstrom, Steven P. Armes, Fiona L. Hatton
Summary: The study investigates the physical adsorption of highly anisotropic copolymer worms onto cellulosic surfaces, demonstrating that electrostatic interactions dominate on anionic silica and CNC surfaces, while additional interactions such as hydrogen bonding, van der Waals forces, and possibly covalent bond formation may be involved on CNF surfaces.
Article
Chemistry, Multidisciplinary
Huibin Cheng, Changlin Cao, Qinghai Zhang, Yangtao Wang, Yanru Liu, Baoquan Huang, Xiao-Li Sun, Yiyou Guo, Lireng Xiao, Qinghua Chen, Qingrong Qian
Summary: This study prepared conductive carbon black-reinforced ultrahigh-molecular weight polyethylene/polypropylene blend with tunable electrical conductivity and good mechanical properties using high-speed mechanical mixing method and compression-molded process. The composite exhibited excellent electrical conductivity, electromagnetic interference shielding effectiveness, and mechanical properties, with absorption-dominated electromagnetic interference shielding effectiveness at X-band.
Article
Nanoscience & Nanotechnology
Piyush Kar, Yun Zhang, Najia Mahdi, Ujwal K. Thakur, Benjamin D. Wiltshire, Ryan Kisslinger, Karthik Shankar
Article
Chemistry, Physical
Pawan Kumar, Ujwal Kumar Thakur, Kazi Alam, Piyush Kar, Ryan Kisslinger, Sheng Zeng, Sahil Patel, Karthik Shankar
Article
Engineering, Environmental
Partha Roy, Ryan Kisslinger, Samira Farsinezhad, Najia Mahdi, Advaita Bhatnagar, Arezoo Hosseini, Lintong Bu, Weidi Hua, Benjamin D. Wiltshire, Andrew Eisenhawer, Piyush Kar, Karthik Shankar
CHEMICAL ENGINEERING JOURNAL
(2018)
Article
Chemistry, Physical
Piyush Kar, Sheng Zeng, Yun Zhang, Ehsan Vahidzadeh, Ajay Manuel, Ryan Kisslinger, Kazi M. Alam, Ujwal K. Thakur, Najia Mahdi, Pawan Kumar, Karthik Shankar
APPLIED CATALYSIS B-ENVIRONMENTAL
(2019)
Article
Engineering, Electrical & Electronic
Kazi M. Alam, Piyush Kar, Ujwal K. Thakur, Ryan Kisslinger, Najia Mahdi, Arash Mohammadpour, Payal A. Baheti, Pawan Kumar, Karthik Shankar
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2019)
Article
Nanoscience & Nanotechnology
Ryan Kisslinger, Abdelrahman M. Askar, Ujwal K. Thakur, Saralyn Riddell, Darren Dahunsi, Yun Zhang, Sheng Zeng, Ankur Goswami, Karthik Shankar
Article
Chemistry, Physical
Ujwal K. Thakur, Sheng Zeng, Pawan Kumar, Sahil Patel, Ryan Kisslinger, Yun Zhang, Piyush Kar, Ankur Goswami, Thomas Thundat, Alkiviathes Meldrum, Karthik Shankar
JOURNAL OF POWER SOURCES
(2019)
Article
Chemistry, Physical
Lian C. T. Shoute, Weidi Hua, Ryan Kisslinger, Ujwal K. Thakur, Sheng Zeng, Ankur Goswami, Pawan Kumar, Piyush Kar, Karthik Shankar
APPLIED SURFACE SCIENCE
(2019)
Article
Engineering, Electrical & Electronic
Ryan Kisslinger, Saralyn Riddell, Spencer Savela, Piyush Kar, Ujwal K. Thakur, Sheng Zeng, Karthik Shankar
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2019)
Article
Materials Science, Multidisciplinary
Pawan Kumar, Piyush Kar, Ajay P. Manuel, Sheng Zeng, Ujwal K. Thakur, Kazi M. Alam, Yun Zhang, Ryan Kisslinger, Kai Cui, Guy M. Bernard, Vladimir K. Michaelis, Karthik Shankar
ADVANCED OPTICAL MATERIALS
(2020)
Article
Chemistry, Physical
Sheng Zeng, Ehsan Vahidzadeh, Collin G. VanEssen, Piyush Kar, Ryan Kisslinger, Ankur Goswami, Yun Zhang, Najia Mandi, Saralyn Riddell, Alexander E. Kobryn, Sergey Gusarov, Pawan Kumar, Karthik Shankar
APPLIED CATALYSIS B-ENVIRONMENTAL
(2020)
Article
Nanoscience & Nanotechnology
Ryan Kisslinger, Saralyn Riddell, Ajay P. Manuel, Kazi M. Alam, Aarat P. Kalra, Kai Cui, Karthik Shankar
Summary: The study demonstrates the formation of Ta2O5 nano-dimple arrays on non-native substrates and the synthesis of gold nanoparticles (Au NPs) on these arrays through anodization and annealing processes. Various factors affecting the formation of the arrays and the properties of Au NPs were investigated. The resulting plasmonic heterojunctions showed significantly higher local field enhancement and catalytic activity compared to Au NPs on quartz substrates.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Ebru Uzer, Pawan Kumar, Ryan Kisslinger, Piyush Kar, Ujwal Kumar Thakur, Karthik Shankar, Tom Nilges
NANOSCALE ADVANCES
(2019)
Article
Nanoscience & Nanotechnology
Ebru Uezer, Pawan Kumar, Ryan Kisslinger, Piyush Kar, Ujwal Kumar Thakur, Sheng Zeng, Karthik Shankar, Tom Nilges
ACS APPLIED NANO MATERIALS
(2019)
Article
Physics, Multidisciplinary
Piyush Kar, Mohammed Khairy El-Tahlawy, Yun Zhang, Mohammad Yassin, Najia Mahdi, Ryan Kisslinger, Ujwal K. Thakur, Abdelrahman M. Askar, Robert Fedosejevs, Karthik Shankar
JOURNAL OF PHYSICS COMMUNICATIONS
(2017)