Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Density functional theory and molecular dynamics simulations of carbon nanotubes, polyetheretherketone and their interfaces
Download
index.pdf
Date
2018
Author
Toraman, Gözdenur
Metadata
Show full item record
Item Usage Stats
459
views
287
downloads
Cite This
Carbon nanotubes are allotropes of carbon with a cylindrical nanostructure. A nanotube can roughly be described as a rolled-up graphene sheet, which is a two dimensional hexagonal arrangement of carbon atoms, often referred to as a honeycomb lattice. Carbon nanotubes, much like their parent material graphene, are characterized by high strength, high Young modulus, durability and tunable electronic behavior. As a result of these superior properties, CNTs have been used in diverse technologically relevant applications over the decades since their successful synthesis. In particular, CNT-polymer composites have gained considerable interest in the materials research community in recent years. The testing, manipulating and design of viable mixtures of nanotubes and polymers presents challenges from an experimental point of view. For this reason, numerical modeling of nanotubes and nanotube reinforced polymers is important. The main objective of this thesis is to examine mechanical properties of carbon nanotubes, Poly Ether Ether Ketone (PEEK) polymer and physical properties of their interface by using Density Functional Theory (DFT) and Molecular Dynamics (MD) techniques. PEEK is a semi-crystalline thermoplastic polymer which has remarkable mechanical properties with a Young modulus of 3.6 GPa and a rather high melting temperature ∼ 370◦ C (when it is reinforced with CNTs this melting point can reach 390◦ C). Thanks to these properties, PEEK is suitable for use in extreme conditions, such as spacecraft, nuclear power plants, petroleum and geothermal wells.
Subject Keywords
Carbon nanotubes.
,
Molecular dynamics.
,
Density functionals.
URI
http://etd.lib.metu.edu.tr/upload/12622497/index.pdf
https://hdl.handle.net/11511/27558
Collections
Graduate School of Natural and Applied Sciences, Thesis
Suggestions
OpenMETU
Core
Meso-scale finite element modelling of carbon nanotube reinforced polymer composites
Haydar, Altay; Esat, Volkan; Mechanical Engineering (2021-12)
Carbon nanotube (CNT) reinforced polymer composites (CNTRPs) are promising materials which can be utilized in a variety of industries. Several experimental research studies have been conducted to determine the mechanical properties of CNTRPs, however results have not been conclusive. In this study, meso-scale representative volume elements (RVEs) of straight and coiled CNT (CCNT) reinforced epoxy composites were analysed by using commercial finite element analysis software MSC Marc-Mentat. CNTs were randoml...
From carbon nanotubes to carbon nanorods
Erkoç, Şakir (2000-09-01)
The structural properties of single and multi-wall carbon nanotubes and the formation of carbon nanorods from multi-wall carbon nanotubes have been investigated by performing molecular-dynamics computer simulations. Calculations have been realized by using an empirical many-body potential energy function for carbon. It has been found that carbon nanorod formation takes place with smallest possible multi-wall nanotubes under heat treatment. On the other hand, it has been also found that single-wall carbon na...
Structural properties of carbon nanorods: Molecular-dynamics simulations
Erkoc, S; Malcıoğlu, Osman Barış (2002-03-01)
The formation of carbon nanorods from various types of carbon nanotubes has been investigated by performing molecular-dynamics computer simulations. Calculations have been realized by using an empirical many-body potential energy function for carbon. It has been found that carbon nanorod formed from carbon nanotubes with different chirality is not stable even at low temperature.
Titanium coverage on a single-wall carbon nanotube: Molecular dynamics simulations
Oymak, H; Erkoç, Şakir (2003-09-12)
The minimum energy structures of titanium covered finite-length C(8,0) singlewall carbon nanotubes (SWNT) have been investigated. We first parameterized an empirical potential energy function (PEF) for the CTi system. The PEF used in the calculations includes two- and three-body atomic interactions. Then, performing molecular dynamics simulations, we obtained the minimum-energy configurations for titanium covered SWNTs. The reported configurations include low and high coverage of Ti on SWNTs. We saw that on...
Structural Vibration Analysis of Single Walled Carbon Nanotubes with Atom Vacancies
Dogan, Ibrahim Onur; Yazıcıoğlu, Yiğit (2014-11-01)
Recent investigations in nanotechnology show that carbon nanotubes have significant mechanical, electrical and optical properties. Interactions between those are also promising in both research and industrial fields. Those unique characteristics are mainly due to the atomistic structure of carbon nanotubes. In this paper, the structural effects of vacant atoms on single walled carbon nanotubes are investigated using matrix stiffness method. In order to use this technique, a linkage between structural mechan...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
G. Toraman, “Density functional theory and molecular dynamics simulations of carbon nanotubes, polyetheretherketone and their interfaces,” M.S. - Master of Science, Middle East Technical University, 2018.