Article
Materials Science, Multidisciplinary
Yingying Sun, Luyao Zhou, Yu Han, Liu Cui
Summary: This study investigates the bending mechanism of graphene nanosheets (GNSs) and its impact on thermal conductivity through molecular dynamics simulations and experimental research. The results show that the thermal conductivity of GNSs decreases linearly with increasing bending height and number. Additionally, the thermal conductivity of graphene-filled composites decreases with increasing bending height but increases with increasing bending length. Therefore, long and low bends in graphene can enhance the thermal conductivity of graphene-filled composites.
MATERIALS & DESIGN
(2022)
Article
Chemistry, Analytical
Zhi-Min Zhou, Ke Wang, Kai-wen Lin, Yue-Hui Wang, Jing-Ze Li
Summary: The study investigated the influence of TPU masterbatches with different melting points on the distribution of graphene, electrical conductivity, and infrared light thermal properties of graphene-thermoplastic polyurethane (G-TPU) composite films. It was found that the characteristics of TPU had little impact on the electrical conductivity, but significantly affected the thermal conductivity of the composite films.
Article
Materials Science, Composites
Aakash Dhawan, Prashant Jindal
Summary: This study reports the formation of PUR and COOH-fG nanocomposites through solution mixing, and their mechanical properties were characterized through various tests. The results showed improved mechanical properties with increasing filler concentration, with the best performance observed at 5wt% composition.
POLYMER COMPOSITES
(2021)
Article
Polymer Science
Yuyang Wang, Guangping Zou, Junpeng Liu
Summary: The effect of the type and content of functional groups on the interfacial shear properties of a functionalized graphene sheet (FGS)/thermoplastic polyurethane (TPU) nanocomposite was investigated using molecular dynamics simulations. The study found that adding carboxyl or hydroxyl groups on the surface of graphene can enhance the interfacial shear properties of the TPU/FGS system due to the strong interaction of electrostatic forces and H-bonds. Increasing the content of functional groups modified on the graphene surface can also improve the interfacial shear properties.
Article
Polymer Science
Fernanda Cabrera Flores Valim, Gustavo Peixoto Oliveira, Lucilene Betega de Paiva, Leice Goncalves Amurin, Chiara Santillo, Marino Lavorgna, Ricardo Jorge Espanhol Andrade
Summary: Thermoplastic polyurethane (TPU) is a multiblock copolymer with an attractive shape memory effect. By incorporating graphene-based nanoparticles and annealing the nanocomposites, improved shape recovery ratio and strain performance are observed.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Maya Pishvar, Mehrad Amirkhosravi, Ica Manas-Zloczower
Summary: In this study, TPU-PTFE nanocomposites with improved thermomechanical properties were successfully made by fibrillation of micron-sized PTFE particulates inside the TPU matrix. PTFE forms a fibrillary network inside the TPU matrix, which enhances the creep behavior, thermal stability, storage modulus, and reduces the thermal expansion coefficient of the nanocomposites. The glass transition temperature of nanocomposites with 10 wt % PTFE shows two transitions, while a single peak is observed for the neat TPU.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Chemistry, Physical
Yun-seok Jun, Saeed Habibpour, Mahdi Hamidinejad, Moon Gyu Park, Wook Ahn, Aiping Yu, Chul B. Park
Summary: Graphene nano-ribbon (GNR) was synthesized by unzipping multi-walled carbon nanotubes (MWCNTs) and compared to MWCNT/TPU composites in terms of electrical conductivity, dielectric properties, electromagnetic interference shielding effectiveness (SE) and mechanical properties. GNR/TPU exhibited superior performance in all aspects, including significantly enhanced electrical conductivity, dielectric properties and EMI SE, as well as higher mechanical strength.
Article
Engineering, Manufacturing
Muhammad Hassaan Ahmed, Asharib Jamshid, Usman Amjad, Aashir Azhar, Muhammad Zawar ul Hassan, Mohsin Islam Tiwana, Waqar Shahid Qureshi, Eisa Alanazi
Summary: This article introduces a new passive foot design that is more energy efficient when 3D printed using thermoplastic polyurethane (TPU) material. The finite element analysis shows that TPU has a higher energy storage ability compared to common materials.
3D PRINTING AND ADDITIVE MANUFACTURING
(2022)
Article
Engineering, Civil
Manjun Li, Binghan Xue, Hongyuan Fang, Shu Zhang, Fuming Wang
Summary: Polyurethane grouting is widely used in projects. This study conducted variable angle shear tests and digital image correlation technology to investigate the failure process and shear properties of polyurethane-bentonite composite specimens. Finite element simulation was also performed. The results showed that the greater the shear angle, the higher the shear strength of the specimens. The normal component had a positive effect on the shear strength. The linear relationship between normal stress and tangential stress provided information on the cohesion and internal friction angle of the specimens. The finite element simulation results were consistent with the experimental results, contributing to the understanding of the shear properties at the interface between polyurethane and bentonite.
Article
Chemistry, Multidisciplinary
Cijun Shuai, Zhicheng Wang, Shuping Peng, Yang Shuai, Yanwen Chen, Da Zeng, Pei Feng
Summary: Combining selective laser sintering (SLS) with water-responsive shape memory polymers provides a promising approach to minimally invasive bone defect repair. In this study, a porous bone scaffold made of biocompatible thermoplastic polyurethane (TPU) with water-responsive shape memory properties was fabricated using SLS. The results showed that water molecules can interact with TPU, affecting the hydrogen bonding and shape fixation. In vitro experiments demonstrated that the shape-recovered scaffold promotes cell adhesion and proliferation.
MATERIALS CHEMISTRY FRONTIERS
(2022)
Article
Polymer Science
Santiago Maldonado-Magnere, Mehrdad Yazdani-Pedram, Hector Aguilar-Bolados, Raul Quijada
Summary: This study investigates the influence of two thermally reduced graphene oxides with different oxygen levels on the barrier properties of TPU nanocomposites. The addition of TRGO increased the Young modulus of the composites and enhanced their barrier properties, leading to a significant decrease in oxygen permeability.
Article
Materials Science, Multidisciplinary
Jonathan T. Villada, Gideon A. Lyngdoh, Rakesh Paswan, Bolaji Oladipo, Sumanta Das
Summary: This paper presents an important advancement in evaluating the mechanical performance of the fusion bond line between acrylic butadiene styrene (ABS) and thermoplastic polyurethane (TPU) using reactive forcefield molecular dynamics (MD) simulation. The interfacial adhesion responses obtained from MD simulation are incorporated into a finite element analysis (FEA) model for macroscopic response evaluation. The predicted stress-strain response from the FEA model shows good correlation with experimental results, demonstrating the predictive efficacy of this simulation approach.
MATERIALS & DESIGN
(2023)
Article
Polymer Science
Xiaoshuai Zhu, Xijue Li, Hao-Yang Mi, Xin Jing, Binbin Dong, Ping He, Chuntai Liu, Changyu Shen
Summary: Thermoplastic polyurethane (TPU) foams are commonly used buffering materials due to their lightweight, high elasticity, and excellent energy absorption properties. In this study, graphene oxide (GO)/TPU composite foams with micro-sized wrinkles on the cell surface were fabricated using a novel dynamic supercritical carbon dioxide (scCO(2)) foaming method. The addition of GO improved the cell density and mechanical properties of the foams, resulting in enhanced compressive modulus, strength, energy absorption, and recoverability. The wrinkled GO/TPU foams with 0.5 wt% GO showed superior performance compared to neat TPU and 1 wt% GO foams, thanks to the reinforcing effect of the wrinkly structure. This study is significant for the development of low-density composite foams with enhanced compressive performance.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Engineering, Multidisciplinary
Guoyu Fu, Fuzhong Sun, Fengzhen Sun, Dehong Huo, Islam Shyha, Chenggang Fang, Qiang Gao
Summary: The study investigates the cutting mechanism of graphene nanoplatelet (GNP)-reinforced polymer matrix composites, showing that the machined surface of polymer/GNP material has more defects compared to plain polymer and the presence of GNPs influences the chip profiles.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Biochemistry & Molecular Biology
Raghvendra Singh Anju, Raghvendra Singh Yadav, Petra Potschke, Juergen Pionteck, Beate Krause, Ivo Kuritka, Jarmila Vilcakova, David Skoda, Pavel Urbanek, Michal Machovsky, Milan Masar, Michal Urbanek
Summary: Nanocomposites consisting of CuxCo1-xFe2O4-rGO-TPU exhibit highly efficient electromagnetic interference shielding, with maximum shielding effectiveness values of 42.9 dB, 46.2 dB, and 58.8 dB. This performance is attributed to good impedance matching, conductivity, dielectric properties, and magnetic loss. These materials are promising candidates for lightweight, flexible, and highly efficient EMI shielding.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
A. Talapatra, J. Mohanty
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2016)
Article
Materials Science, Multidisciplinary
Navdeep Singh, Anjana Talapatra, Anchalee Junkaew, Thien Duong, Sean Gibbons, Shengyen Li, Hassan Thawabi, Emmi Olivos, Raymundo Arroyave
COMPUTATIONAL MATERIALS SCIENCE
(2016)
Article
Chemistry, Physical
Anjana Talapatra, Raymundo Arroyaye
JOURNAL OF ALLOYS AND COMPOUNDS
(2016)
Article
Physics, Condensed Matter
Peter Entel, Mario Siewert, Markus E. Gruner, Heike C. Herper, Denis Comtesse, Raymundo Arroyave, Navedeep Singh, Anjana Talapatra, Vladimir V. Sokolovskiy, Vasiliy D. Buchelnikov, Franca Albertini, Lara Righi, Volodymyr A. Chernenko
EUROPEAN PHYSICAL JOURNAL B
(2013)
Article
Materials Science, Multidisciplinary
A. Junkaew, B. Ham, X. Zhang, A. Talapatra, R. Arroyave
MATERIALS RESEARCH LETTERS
(2013)
Article
Engineering, Mechanical
Animesh Talapatra, Debasis Datta
Summary: The study demonstrates that adding functionalized monolayer graphene can significantly enhance the mechanical properties of thermoplastic polyurethane, especially with the addition of 3 wt.%. Additionally, under the condition of adding 3 wt.% of functionalized monolayer graphene, the coefficient of friction and abrasion rate reach their minimum values, showing varying levels of change under different sliding velocities.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2021)
Article
Materials Science, Composites
Animesh Talapatra, Debasis Datta
Summary: The effects of different graphene parameters on the interfacial properties of graphene reinforced thermoplastic polyurethane nanocomposites were analyzed using molecular dynamics simulations. The study found that molecular bindings between graphene and the polymer matrix significantly influence interfacial shear strength. Different graphene structures have varying effects on enhancing the mechanical properties of the nanocomposites.
COMPOSITE INTERFACES
(2021)
Review
Polymer Science
Animesh Talapatra, Debasis Datta
Summary: This review summarizes the research progress on graphene-reinforced polymer nanocomposites based on molecular dynamics simulations, including the mechanisms of performance enhancement, simulation methods, and suitable protocols for model development. Through careful review of published studies, the authors identified two important factors affecting the simulation results. Finally, potential applications and future prospects are discussed.
Article
Chemistry, Physical
Animesh Talapatra, Debasis Datta
Summary: This MD simulation-based study explores the improvement in elastic moduli and strength properties of Stone-Wales defective hydrogen functionalized graphene-reinforced thermoplastic polyurethane nanocomposite. Three models, namely CM, SM, and IM, have been used to estimate enhancements under different conditions. The results show that CM models exhibit the highest enhancement in moduli values, while IM models have substantially higher interfacial normal strength compared to interfacial shear strength.
MOLECULAR SIMULATION
(2021)
Article
Materials Science, Multidisciplinary
Anjana Talapatra, T. Duong, W. Son, H. Gao, M. Radovic, R. Arroyave
