Using various techniques to characterize oxidative functionalized and aminosilanized carbon nanotubes for polyamide matrix

Date

2013-01-01

Author

Sankal, Secil
Kaynak, Cevdet

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

154
views

0
downloads

The main purpose of this study was to reveal usability of various characterization techniques for certain aspects of surface functionalized multi-walled carbon nanotubes. Surfaces were first oxidative functionalized by sulphuric acid/nitric acid mixture, then aminosilanized by gamma-aminopropyltriethoxysilane. Chemical groups formed on carbon nanotubes due to these surface treatments were characterized by X-ray photoelectron spectroscopy, Fourier-transform infrared spectroscopy and also energy dispersive spectroscopy. Morphological changes and crystal structure of surface-treated carbon nanotubes were analyzed by scanning electron microscopy and X-ray diffraction, respectively. Thermogravimetric analysis was also used to observe thermal degradation of the chemical groups formed on the nanotube surfaces. In the second part of the study, Polyamide-6 nanocomposites were produced by using unmodified and surface functionalized carbon nanotubes. Transmission electron microscopy indicated that surface functionalization improves distribution of carbon nanotubes in the matrix, while flexural tests revealed that strength and modulus values could be increased as much as 30% and 40%, respectively, due to enhanced interfacial bonding between the matrix and nanotubes.

Subject Keywords

Carbon nanotubes, Polyamide-6, Aminosilanization, Oxidative functionalization

URI

https://hdl.handle.net/11511/43319

Journal

JOURNAL OF REINFORCED PLASTICS AND COMPOSITES

DOI

https://doi.org/10.1177/0731684412466315

Collections

Department of Metallurgical and Materials Engineering, Article

Suggestions

OpenMETU
Core

Effects of oxidative functionalization and aminosilanization of carbon nanotubes on the mechanical and thermal properties of polyamide 6 nanocomposites Kaynak, Cevdet (SAGE Publications, 2013-11-13) The focus of this study is to investigate the effects of oxidative functionalized carbon nanotubes (f-CNTs) and aminosilanized carbon nanotubes (s-CNTs) on the mechanical and thermal properties of polyamide 6 nanocomposites. Oxidation of nanotube surfaces was conducted with sulfuric acid/nitric acid mixture and then aminosilanization was carried out with -aminopropyltriethoxysilane. Nanocomposites were compounded by melt mixing technique and shaped by injection molding. Scanning electron microscopy images r...
Effects of oxidative functionalized and aminosilanized carbon nanotubes on the crystallization behaviour of polyamide-6 nanocomposites Kaynak, Cevdet (2014-04-01) The purpose of this study is to investigate effects of oxidative functionalized and aminosilanized carbon nanotubes on the (1) isothermal and (2) non-isothermal crystallization kinetics of polyamide-6 by DSC analyses, and (3) crystal structure of injection molded specimens by XRD analyses. Nanocomposites were compounded by using melt mixing technique via twin screw extrusion. Due to basically very effective heterogeneous nucleation effect, both increasing amount and surface functionalization of carbon nanot...
An Experimental study on boundary layer separation control over s809 airfoil using synthetic jet actuators Gül, Melika; Akmandor, İbrahim Sinan; Uzol, Oğuz; Department of Aerospace Engineering (2013) This thesis presents the results of an experimental study that investigates the effect of periodic excitation from individually controlled synthetic jet actuators on the separated shear layer and wake of a model wing that has S809 airfoil profile. The synthetic jet array consists of three individually controlled synthetic jet actuators driven by piezoelectric diaphragms located at 28% chord location near the middle of the span of the blade. In the first part of the study, hot wire and surface pressure measu...
Performance of polylactide biopolymer as matrix material for woven fiber composite laminates Demirok, Gokberk; Kaynak, Cevdet (2022-01-01) The first purpose of this study was, as the first time in the literature, to investigate usability of polylactide (PLA) biopolymer as the matrix of high-performance composite laminated structures having woven forms of glass and carbon fibers. For this purpose, 2-14 layers of 2 × 2 twill Carbon Fiber (CF) and 1 × 1 plain weave Glass Fiber (GF) forms were stacked by PLA powders followed by consolidation of these layers by compression molding technique. After conducting various tests and analysis it was observ...
Effect of carbon nanotube surface treatment on the morphology, electrical, and mechanical properties of the microfiber-reinforced polyethylene/poly(ethylene terephthalate)/carbon nanotube composites Yesil, Sertan; Bayram, Göknur (2013-01-15) The aim of this study is to investigate the effects of carbon nanotube (CNT) chemical properties, CNT content, and molding temperature on the morphology, electrical, and mechanical properties of the microfiber-reinforced polymer composites. These composites were prepared by extrusion and hot stretching the poly(ethylene terephthalate) (PET)/CNT phase in high density polyethylene (HDPE) matrix. Surfaces of the CNT were modified by purification with strong acid mixture (HNO3 : H2SO4 mixture 1 : 1 by volume) f...

Citation Formats

S. Sankal and C. Kaynak, “Using various techniques to characterize oxidative functionalized and aminosilanized carbon nanotubes for polyamide matrix,” JOURNAL OF REINFORCED PLASTICS AND COMPOSITES, pp. 75–86, 2013, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/43319.