Viscoelastic behavior of Carbon Nanotubes Impregnated Polyurethane: A detailed study of Structural, Mechanical, Thermal and Hydrophobic properties

2022 ◽  
pp. 131722
Author(s):  
Adhigan Murali ◽  
Sellamuthu N. Jaisankar
Keyword(s):  
Carbon Nanotubes ◽  
Viscoelastic Behavior ◽  
Hydrophobic Properties

Carbon nanotubes and polyaniline filled hybrid epoxy composites: Assessing the viscoelastic behavior and mechanical properties

2018 ◽  
Vol 40 (S2) ◽  
pp. E1143-E1150
Author(s):  
Vinay Khandelwal ◽  
Sushanta K. Sahoo ◽  
Gaurav Manik ◽  
Kishor Biswas
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Viscoelastic Behavior ◽  
Epoxy Composites

Viscoelastic behavior of poly(ether imide) incorporated with multiwalled carbon nanotubes

2012 ◽  
Vol 50 (21) ◽  
pp. 1504-1514 ◽  
Author(s):  
Kimberly B. Shepard ◽  
Halil Gevgilili ◽  
Miguel Ocampo ◽  
Jia Li ◽  
Frank T. Fisher ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Viscoelastic Behavior ◽  
Multiwalled Carbon

scholarly journals Molecular Simulations of Cyclic Loading Behavior of Carbon Nanotubes Using the Atomistic Finite Element Method

2009 ◽  
Vol 2009 ◽  
pp. 1-9 ◽  
Author(s):  
Jianfeng Wang ◽  
Marte S. Gutierrez
Keyword(s):  
Finite Element Method ◽  
Carbon Nanotubes ◽  
Finite Element ◽  
Cyclic Loading ◽  
Large Strain ◽  
Fatigue Behavior ◽  
Dominant Role ◽  
Molecular Simulations ◽  
Viscoelastic Behavior ◽  
Element Method

The potential applications of carbon nanotubes (CNT) in many engineered bionanomaterials and electromechanical devices have imposed an urgent need on the understanding of the fatigue behavior and mechanism of CNT under cyclic loading conditions. To date, however, very little work has been done in this field. This paper presents the results of a theoretical study on the behavior of CNT subject to cyclic tensile and compressive loads using quasi-static molecular simulations. The Atomistic Finite Element Method (AFEM) has been applied in the study. It is shown that CNT exhibited extreme cyclic loading resistance with yielding strain and strength becoming constant within limited number of loading cycles. Viscoelastic behavior including nonlinear elasticity, hysteresis, preconditioning (stress softening), and large strain have been observed. Chiral symmetry was found to have appreciable effects on the cyclic loading behavior of CNT. Mechanisms of the observed behavior have been revealed by close examination of the intrinsic geometric and mechanical features of tube structure. It was shown that the accumulated residual defect-free morphological deformation was the primary mechanism responsible for the cyclic failure of CNT, while the bond rotating and stretching experienced during loading/unloading played a dominant role on the strength, strain and modulus behavior of CNT.

scholarly journals Sulfur-Modified Carbon Nanotubes for the Development of Advanced Elastomeric Materials

Polymers ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 821
Author(s):  
Pilar Bernal-Ortega ◽  
M. Mar Bernal ◽  
Anke Blume ◽  
Antonio González-Jiménez ◽  
Pilar Posadas ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
High Performance ◽  
Viscoelastic Behavior ◽  
Rolling Resistance ◽  
Van Der Waals Interactions ◽  
Nano Particles ◽  
Rubber Matrix ◽  
Covalent Bonds ◽  
Positive Effects ◽  
Rubber Compounds

The outstanding properties of carbon nanotubes (CNTs) present some limitations when introduced into rubber matrices, especially when these nano-particles are applied in high-performance tire tread compounds. Their tendency to agglomerate into bundles due to van der Waals interactions, the strong influence of CNT on the vulcanization process, and the adsorptive nature of filler–rubber interactions contribute to increase the energy dissipation phenomena on rubber–CNT compounds. Consequently, their expected performance in terms of rolling resistance is limited. To overcome these three important issues, the CNT have been surface-modified with oxygen-bearing groups and sulfur, resulting in an improvement in the key properties of these rubber compounds for their use in tire tread applications. A deep characterization of these new materials using functionalized CNT as filler was carried out by using a combination of mechanical, equilibrium swelling and low-field NMR experiments. The outcome of this research revealed that the formation of covalent bonds between the rubber matrix and the nano-particles by the introduction of sulfur at the CNT surface has positive effects on the viscoelastic behavior and the network structure of the rubber compounds, by a decrease of both the loss factor at 60 °C (rolling resistance) and the non-elastic defects, while increasing the crosslink density of the new compounds.

Possibilities of using carbon nanotubes in General Aviation

2019 ◽  
Vol 126 ◽  
pp. 111-121
Author(s):  
Anita Linka ◽  
Agnieszka Wróblewska
Keyword(s):  
Carbon Nanotubes ◽  
General Aviation ◽  
Hydrophobic Properties ◽  
Reliability Parameters ◽  
Safety And Reliability ◽  
Costs Of Production ◽  
Production And Operation

Nanotechnology is a relatively new field of science that focuses on technology at the nanoscale. Matter in this dimension often shows significantly different properties that find their application in completely new technical areas [1]. General Aviation, like every other area of aviation, constantly strives to reduce the costs of production and operation of aircraft while maintaining unchanged safety and reliability parameters. Systems used in aviation, for example communication, usually do not apply in the area of General Aviation because of their cost. An example of this is the anti-icing system used in passenger airliners, which cannot be used in GA aircraft due to the costs and additional construction load. Carbon nanotubes exhibit very good hydrophobic properties, thanks to that, they can turn out to be an excellent substitute for systems in the area of aviation transport.

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