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

Date

2013-01-01

Author

Sankal, Secil
Kaynak, Cevdet

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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

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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.