Improved Strength and Toughness of Carbon Woven Fabric Composites with Functionalized MWCNTs
AbstractThis investigation examines the role of carboxyl functionalized multi-walled carbon nanotubes (COOH-MWCNTs) in the on- and off-axis flexure and the shear responses of thin carbon woven fabric composite plates. The chemically functionalized COOH-MWCNTs were used to fabricate epoxy nanocomposites and, subsequently, carbon woven fabric plates to be tested on flexure and shear. In addition to the neat epoxy, three loadings of COOH-MWCNTs were examined: 0.5 wt%, 1.0 wt% and 1.5 wt% of epoxy. While no significant statistical difference in the flexure response of the on-axis specimens was observed, significant increases in the flexure strength, modulus and toughness of the off-axis specimens were observed. The average increase in flexure strength and flexure modulus with the addition of 1.5 wt% COOH-MWCNTs improved by 28% and 19%, respectively. Finite element modeling is used to demonstrate fiber domination in on-axis flexure behavior and matrix domination in off-axis flexure behavior. Furthermore, the 1.5 wt% COOH-MWCNTs increased the toughness of carbon woven composites tested on shear by 33%. Microstructural investigation using Fourier Transform Infrared Spectroscopy (FTIR) proves the existence of chemical bonds between the COOH-MWCNTs and the epoxy matrix. View Full-Text
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Soliman, E.; Kandil, U.; Taha, M.R. Improved Strength and Toughness of Carbon Woven Fabric Composites with Functionalized MWCNTs. Materials 2014, 7, 4640-4657.
Soliman E, Kandil U, Taha MR. Improved Strength and Toughness of Carbon Woven Fabric Composites with Functionalized MWCNTs. Materials. 2014; 7(6):4640-4657.Chicago/Turabian Style
Soliman, Eslam; Kandil, Usama; Taha, Mahmoud R. 2014. "Improved Strength and Toughness of Carbon Woven Fabric Composites with Functionalized MWCNTs." Materials 7, no. 6: 4640-4657.