Article
Chemistry, Multidisciplinary
Ioan Valentin Tudose, Kyriakos Mouratis, Octavian Narcis Ionescu, Cosmin Romanitan, Cristina Pachiu, Oana Tutunaru-Brincoveanu, Mirela Petruta Suchea, Emmanouel Koudoumas
Summary: This study fabricates graphene nanoplatelets (GNPs) and multiwall carbon nanotubes (CNTs)-polypropylene (PP) composite materials for electromagnetic interference (EMI) shielding applications. The obtained composite materials are not simple physical mixtures of these components but new materials with particular properties, with the filler concentration and nature affecting the nanomaterials' structure and their conductivity. The characteristics of GNPs have a significant effect on their functionality, leading to composites with lower conductivity and less effective EMI shielding. The CNTs-PP composite panels exhibit excellent EMI attenuation when the CNTs concentration is at 10%.
Article
Materials Science, Composites
Ashish Kaushal, Vishal Singh
Summary: This study investigates the dc conductivity, mechanical properties, and EMI shielding response of MWCNT reinforced polypropylene nanocomposites prepared by melt processing. The results show improved tensile strength and electrical conductivity, with significant EMI shielding effectiveness achieved at 5 wt% MWCNT load in the X-band frequency range. The prepared nanocomposite is considered suitable for industrial shielding applications due to its mechanical durability.
POLYMER COMPOSITES
(2021)
Article
Materials Science, Composites
Yanmei Piao, Vipin N. Tondare, Chelsea S. Davis, Justin M. Gorham, Elijah J. Petersen, Jeffrey W. Gilman, Keana Scott, Andras E. Vladar, Angela R. Hight Walker
Summary: This study evaluated the effectiveness of XPS, Raman spectroscopy, and SEM methods on MWCNT-epoxy nanocomposite samples, finding a positive correlation between signal intensity and MWCNT mass loading. The results showed that these methods were capable of detecting MWCNTs at different concentrations and demonstrated good comparability among them.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Polymer Science
Olesja Starkova, Klara Aniskevich, Jevgenijs Sevcenko, Olga Bulderberga, Andrey Aniskevich
Summary: Assessing the accumulated irreversible strains in polymer composites is crucial for controlling dimensional stability and remaining life of structural components. An empirical relationship between residual and total creep strain has been established through analysis of creep-recovery data, enabling a quick evaluation of long-term accumulated residual strains.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
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
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
Engineering, Manufacturing
James D. Randall, Filip Stojcevski, Nemanja Djordjevic, Andreas Hendlmeier, Bhagya Dharmasiri, Melissa K. Stanfield, Daniel B. Knorr, Ngon T. Tran, Russell J. Varley, Luke C. Henderson
Summary: This manuscript presents a rapid surface modification method for carbon fibers using small molecules in polypropylene composites. The attachment of n-butylphenyl species onto the fiber surface improved the toughness by 32% and 30% at 10% and 40% weight fractions respectively. The embedded fiber length, fiber weight fraction, and polymer thermal properties were not affected by the modification, suggesting that the mechanical performance changes originated from the installed surface chemistry blending with the polymer phase.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Chemistry, Multidisciplinary
Maria A. Rezvova, Pavel A. Nikishau, Miraslau I. Makarevich, Tatiana V. Glushkova, Kirill Yu. Klyshnikov, Tatiana N. Akentieva, Olga S. Efimova, Andrey P. Nikitin, Valentina Yu. Malysheva, Vera G. Matveeva, Evgeniia A. Senokosova, Mariam Yu. Khanova, Viacheslav V. Danilov, Dmitry M. Russakov, Zinfer R. Ismagilov, Sergei V. Kostjuk, Evgeny A. Ovcharenko
Summary: Nanocomposites based on poly(styrene-block-isobutylene-block-styrene) (SIBS) and single-walled carbon nanotubes (CNTs) were prepared with improved dispersion using dodecylamine (DDA) modified CNTs. The tensile strength of the nanocomposites with low molecular weight SIBS was increased with the addition of functionalized CNTs, while high molecular weight SIBS showed no significant improvement. The nanocomposites demonstrated enhanced biocompatibility, but high concentrations of CNTs could cause platelet aggregation.
Article
Materials Science, Multidisciplinary
Kaleem Ahmad, Zeyad Almutairi
Summary: Solid solutions based on bismuth telluride are commonly used in industries for thermoelectric applications close to room temperature, but their efficiency is limited. This study focuses on improving the energy conversion efficiency of Bi2Te3 by mixing it with carbon nanotubes, utilizing nanostructuring and quantum confinement effects. The addition of carbon nanotubes enhances the electrical conductivity and Seebeck coefficient, leading to improved power factor and thermal conductivity reduction, resulting in a substantial improvement in the thermoelectric figure of merit of the composite.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Polymer Science
Gang Li, Yanpei Fei, Tairong Kuang, Tong Liu, Mingqiang Zhong, Yanbiao Li, Jing Jiang, Lih-Sheng Turng, Feng Chen
Summary: This study explored the injection foaming process of in situ fibrillation reinforced polypropylene composites. The results showed that in situ fibrillation of PTFE can significantly influence the melt strength and viscoelasticity, thus improving the foaming performance. Additionally, the addition of MWCNTs endows the material with conductive properties. These findings are expected to be applied in the lightweight, antistatic, and high-performance automotive industry.
Article
Engineering, Mechanical
Masoud Yekani Fard
Summary: In this study, the CNT network and interphase in nanocomposites were quantitatively investigated using AFM, revealing significant interphase effects in BP PNC and the influence of inter-bundle and intra-bundle pores on CNT network sizes. Various models for nanocomposite moduli were evaluated.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Materials Science, Composites
Yasser Zare, Kyong Yop Rhee, Soo-Jin Park
Summary: The operative interphase properties around carbon nanotubes networks play a significant role in determining the strength of nanocomposites, with factors such as critical interfacial shear strength and interfacial shear strength defining the depth and power of the interphase area. Experimental results and parametric analyses are used to validate the established model, showing that both very low tau(c) and extremely high tau values can greatly increase the strength of nanocomposites. The strongest and densest interphase around CNT networks can significantly improve the strength of nanocomposites, while poor or thin interphase only has a minor effect on strength. Additionally, the size and density of CNTs also play a role in determining the strength of the nanocomposites.
POLYMER COMPOSITES
(2021)
Article
Materials Science, Multidisciplinary
Yasser Zare, Kyong Yop Rhee
Summary: This article determines the required interfacial shear strength between a polymer medium and carbon nanotubes to define the operative interphase thickness in nanocomposites. A model is developed using various parameters to predict the strength of CNT-filled systems, which has been validated by real values for multiple examples. Low tau(c) and high tau positively influence the strength of nanocomposites, with CNT size being the most significant factor impacting the relative strength.
RESULTS IN PHYSICS
(2021)
Article
Engineering, Environmental
Mohsen Ahmadipour, Azrul Azlan Hamzah, Ai Ling Pang, Anh Thi Le, Sin-Ling Chiam, Zainal Arifin Ahmad, Beerelli Rajitha, Swee Yong Pung
Summary: The addition of MWCNT led to a decrease in crystallite size and an increase in surface area, as well as a decrease in optical bandgap energy of CaCu3Ti4O12, making it a promising photocatalyst for environmental applications. Coupling CaCu3Ti4O12 with 0.3 wt% of MWCNT resulted in the highest photodegradation efficiencies under UV and visible light illumination. The kinetic data fitted a pseudo-first-order model showing the potential for enhancing the photocatalytic performance of CaCu3Ti4O12 using MWCNT.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Yasser Zare, Kyong Yop Rhee, Soo-Jin Park
Summary: A new Halpin-Tsai model is developed to calculate the modulus of halloysite-nanotube based composites considering the nets of filler and interphase. The calculations match well with experimental facts, and the parametric examinations show acceptable outputs.
SURFACES AND INTERFACES
(2023)
Article
Computer Science, Information Systems
Nitish Kumar, Jialuo Chen, Monodeep Kar, Suresh K. Sitaraman, Saibal Mukhopadhyay, Satish Kumar
IEEE INTERNET OF THINGS JOURNAL
(2019)
Article
Chemistry, Physical
Huibin Chang, Mingxuan Lu, Jeffrey Luo, Jin Gyu Park, Richard Liang, Cheol Park, Satish Kumar
Article
Engineering, Chemical
Po-Hsiang Wang, Prabhakar Gulgunje, Sushanta Ghoshal, Ihab N. Odeh, Nikhil Verghese, Satish Kumar
POLYMER ENGINEERING AND SCIENCE
(2019)
Article
Engineering, Chemical
Po-Hsiang Wang, Prabhakar Gulgunje, Sushanta Ghoshal, Nikhil Verghese, Satish Kumar
POLYMER ENGINEERING AND SCIENCE
(2019)
Article
Materials Science, Multidisciplinary
David B. Brown, Thomas L. Bougher, Xiang Zhang, Pulickel M. Ajayan, Baratunde A. Cola, Satish Kumar
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2019)
Article
Polymer Science
Reza Zoughi, Pedro J. Arias-Monje, John Gallion, Sourangsu Sarkar, Po-Hsiang Wang, Prabhakar Gulgunje, Nikhil Verghese, Satish Kumar
Article
Engineering, Electrical & Electronic
Nitish Kumar, Chandan Joishi, Zhanbo Xia, Sidhharth Rajan, Satish Kumar
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2019)
Article
Engineering, Electrical & Electronic
Nitish Kumar, Diego Vaca, Chandan Joishi, Zhanbo Xia, Sidhharth Rajan, Satish Kumar
IEEE ELECTRON DEVICE LETTERS
(2020)
Article
Biochemistry & Molecular Biology
Sushanta Ghoshal, Carlos Mattea, Paul Denner, Siegfried Stapf
Article
Physics, Applied
Wenqing Shen, Suhas Kumar, Satish Kumar
Summary: Researchers studied tantalum oxide memristive switches using in-operando thermal and x-ray mapping, observing localized conductive filaments and temperature hot spots. They constructed a hybrid electro-thermal model to predict electrical characteristics and temperature rise, demonstrating thermal crosstalk in a memristor array. This model will be crucial for guiding system design by considering thermal performance in future electronic chips.
APPLIED PHYSICS LETTERS
(2021)
Article
Engineering, Chemical
Mingxuan Lu, Jiawei Xu, Pedro J. Arias-Monje, Prabhakar Gulgunje, Kishor Gupta, Narayan Shirolkar, Adam P. Maffe, Edward DiLoreto, Jyotsna Ramachandran, Yudhisthira Sahoo, Sandip Agarwal, Carson Meredith, Satish Kumar
Summary: Continuous Joule heating is used to stabilize PAN fibers containing carbon nanotubes efficiently and energy-savingly, reducing stabilization time and energy consumption significantly. The development of a heat transfer and thermodynamics model helps to understand the advantages of Joule heating over convective heating, with the minimum energy needed estimated to be less than 1% of traditional convective heating methods.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Polymer Science
Mingxuan Lu, Pedro J. Arias-Monje, Jyotsna Ramachandran, Prabhakar Gulgunje, Jeffrey Luo, Mohammad Hamza Kirmani, Carson Meredith, Satish Kumar
Summary: The use of carbon nanotubes (CNT) can accelerate reaction rates and reduce PAN stabilization time, improving the efficiency of carbon fiber production. The addition of CNTs reduces the activation energy of PAN cyclization but increases it for the oxidation reaction.
POLYMER DEGRADATION AND STABILITY
(2021)
Article
Engineering, Electrical & Electronic
Amitav Tikadar, Joon Woo Kim, Yogendra Joshi, Satish Kumar
Summary: This article examines a novel concept of flow-assisted latent beat-driven two-phase evaporative cooling and evaluates its electrothermal performance using computational fluid dynamics/heat transfer and electromagnetic-lumped parameter thermal network models. The study shows that this cooling method improves heat management by utilizing thin-film evaporation on the outer surface of the winding. The results demonstrate that the EC approach achieves higher thermal efficiency under certain conditions.
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
(2022)
Editorial Material
Engineering, Electrical & Electronic
Satish Kumar
Summary: Carbon nanotube field-effect transistors fabricated with aligned nanotube arrays have a consistent sequence of random ternary bits, which can be separated and used to generate secure keys for encrypted communications.
NATURE ELECTRONICS
(2022)
Article
Nanoscience & Nanotechnology
Huibin Chang, Mingxuan Lu, Pedro Jose Arias-Monje, Jeffrey Luo, Cheol Park, Satish Kumar
ACS APPLIED NANO MATERIALS
(2019)
Article
Polymer Science
Yuanzhang Jiang, Xuyi Wang, Yanting Han, Dakai Gong, Yingchun Gu, Lin Tan
Summary: In this study, FeCl3 and poly(acrylic acid) (PAA) were doped into waterborne polyurethanes (WPUs) to create multifunctional materials with self-healing and antimicrobial properties. WPU/Fe/PAA-5.5, containing 5.5 wt % PAA, exhibited excellent mechanical properties, strong self-healing capabilities, and an impressive antimicrobial rate of over 90%. These supramolecular films were also highly recyclable through hot-pressing.
Article
Polymer Science
Longyu Tian, Min Wang, Guangming Liao, Baoliang Liu, Sujuan Zhang, Yucheng Sun, Zhen Meng, Jintao Zhang, Zaijun Lu
Summary: Two kinds of benzoxazine monomers were synthesized and used to prepare polybenzoxazine anion exchange membranes (AEMs) with quaternary ammonium functionalization. The LQPBZ AEM exhibited better ion conductivity and alkaline stability.
Article
Polymer Science
Claire A. Lemarchand
Summary: This study investigates the shock behavior of three different polymers through molecular dynamics simulations. The results reveal specificities in the shock behavior of polymers, including deviations from the linear relation between shock velocity and particle velocity, as well as differences in shear stress relaxation behind the shock front. It is found that the deviation of the Hugoniot locus is related to the change in the relative contribution of bonding and non-bonding potential energies, while polymers with higher glass transition temperatures exhibit slower shear stress relaxation.
Article
Polymer Science
Zengquan Liu, Xiaochun Yin, He Zhang, Shuo Gao, Qinglin Kuang, Yanhong Feng
Summary: A powder solid-state extension (PSSE) technology was proposed to address the high melt viscosity issue of UHMWPE. By uniaxial extension and sintering in the solid state, a highly self-reinforced material was prepared. X-ray diffraction and scattering techniques were used to study the structural evolution during the PSSE process, and a solid-phase induced transformation model was established.
Article
Polymer Science
Zhike Li, Anyu Luo, Rui Zhou, Xin Li, Haiyan Li
Summary: A novel high temperature resistance IL@SiO2 nanocapsules were successfully prepared and their friction and wear properties in PA6 composites were studied. The addition of IL@SiO2 nanocapsules reduced the friction coefficient and wear rate without affecting the mechanical properties of PA6. The synergy between the IL core and SiO2 wall in the nanocapsules improved the self-lubricating performance of the PA6 composites.
Article
Polymer Science
Xin Liu, Xuhong Guo, Qi Liao
Summary: In this study, an algorithm for accurately estimating viscosity is developed using molecular dynamics simulations and the Green-Kubo formula. This algorithm can be applied to complex systems with long correlations, such as macromolecular and biological simulation systems.
Article
Polymer Science
Hao Pu, Yun-Lei Hou, Jing -Zhou Chen, Dong -Lin Zhao
Summary: The use of modified graphene improves the interfacial adherence of carbon fibers to epoxy resin, resulting in enhanced interfacial and bending properties of CF and matrix in CF/EP composites, as well as increased interlaminar shear strength and flexural strength.
Article
Polymer Science
Wei-Chung Ke, Jin-Wei Lin, Manohar Reddy Busireddy, Yueh-Hsing Lee, Jiun-Tai Chen, Chain-Shu Hsu
Summary: This study introduces a crosslinkable monomer, TAIC, to synthesize three crosslinked polyimide films, which exhibit improved thermal, mechanical, and dielectric properties. The introduction of TAIC enhances the tensile strength, reduces the dielectric constant and dielectric loss, and decreases the coefficient of thermal expansion of the polyimide films.
Article
Polymer Science
Alex Kwasi Kumi, Ruiling Fan, Ye Chen, Yumei Zhang
Summary: The difference in leaching of amylopectin from cellulose/amylopectin/1-butyl-3-methylimidazolium chloride ([Bmim][Cl]) blends during regeneration in water and aqueous ethanol has been studied. Molecular dynamics simulations showed that the dissolution and regeneration mechanisms of amylopectin in [Bmim][Cl] are similar to cellulose in ionic liquids. Water regeneration leads to weak electrostatic interactions, resulting in high leaching of amylopectin. In contrast, ethanol-water interactions enhance electrostatic interactions among amylopectin chains, limiting amylopectin leaching in aqueous ethanol.
Article
Polymer Science
Xi Zeng, Junwei Zhou, Junbiao Peng, Chunsheng Zhang, Danling Wang, Yihu Song, Qiang Zheng
Summary: This study utilizes an oligomer deep eutectic solvent (DES) based on polyethylene glycol to regulate the vulcanization kinetics of rubber. The results show that the DES can accelerate vulcanization at low temperatures without affecting the crosslinking density and Mullins effect.
Article
Polymer Science
Qianqian Yue, Yongfei Peng, Xingjian Liu, Aihua He, Huarong Nie
Summary: The addition of metal deactivators can effectively suppress the aging of TBIR, prolong its lifespan, and have no negative effects on its physical and processing properties. These research findings are of great importance for improving the stability and aging resistance of polymers.
Article
Polymer Science
J. Gomez-Caturla, J. Ivorra-Martinez, R. Tejada-Oliveros, V Moreno, D. Garcia-Garcia, R. Balart
Summary: This work focuses on the development of environmentally friendly PLA formulations by using different esters derived from geraniol as plasticizers. The results show that these esters have good compatibility with PLA, and they can effectively enhance the elongation and plasticity of PLA, reduce its glass transition temperature, and slightly improve its water absorption capabilities.
Article
Polymer Science
Dandan Li, Zhaohui Lu, Zhao Ke, Ke Xu, Fengna Dai, Youhai Yu, Guangtao Qian, Chunhai Chen
Summary: In this study, cross-linked PI aerogel membranes with low dielectric constant and high moisture resistance were prepared by co-polymerization and scraping coating technology. The incorporation of fluorinated blocks and benzimidazole ring structures resulted in novel PI aerogel membranes with fascinating dielectric properties and outstanding moisture resistance.
Article
Polymer Science
Zhaoyang Chu, Qing Zhang, Haihua Luo, Han Zhou, Fapei Zhang, Wei Chen, Wenhua Zhang
Summary: Multi-physical fields solution processing strategy is a universal and facile method for preparing various conjugated polymer films and high-performance devices. In this study, we employed a combined microfluidic flow and ultrasonication strategy (FU) for processing CP solutions, and found a pronounced synergetic effect in promoting the pre-ordering of chains in solution. The conformation order and anisotropy of the solution were revealed through various characterizations. A non-classical nucleation model for polymer crystallization in non-equilibrium solution processing was confirmed. The roles of microfluidic flow and ultrasonication in chain aggregation and crystallization were addressed through multi-physical simulations. Compared to pristine solutions, the FU strategy showed improved solution anisotropy and crystallization kinetics, resulting in higher crystallinity in films and increased mobilities in OFET devices. The FU processing strategy provides a universal approach for regulating chain conformation and aggregation in conjugated polymer solutions.