Latest revision as of 09:40, 5 March 2021

Abstract

Chemical functionalization of multiwalled carbon nanotubes (MWCNTs) is important from the view point of polymer based composite manufacturing. As pristine MWCNTs has certain disadvantage such as they have lower dispersion, they are hydrophobic and are not readily soluble in a solvent, these characteristics makes them unreliable candidate for most of the industrial applications. By doing chemical functionalization of MWCNTs, these shortcomings can be overcome, and the MWCNTs can be used as a filler in composite manufacturing. This has the advantage of better nanofillers’ dispersion and provide the better interfacial bonding. In this study, MWCNTs are functionalized by the carboxylic group, chemical functionalization of MWCNTs is an optimization problem, governed by parameters like mixture acid concentration, temperature, time of heating and amount of MWCNTs used. Material characterization of MWCNTs is done and test specimens are manufactured according to different concentrations of MWCNTs within a bio-based epoxy resin. Mechanical properties are then compared according to different concentrations. These mechanical and material characterizations increase the understanding of chemical functionalization by carboxylic group and the influence of the concentration of MWCNTs dispersed within the bio-based resin matrix.

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References

[1] Ramon, E.; Sguazzo, C.; Moreira, P. A Review of Recent Research on Bio-Based Epoxy Systems for

Engineering Applications and Potentialities in the Aviation Sector. Aerospace 2018, 5, 110,

doi:10.3390/aerospace5040110.

[2] Monthioux, M.; Kuznetsov, V. L. Who should be given the credit for the discovery of carbon nanotubes? Carbon N. Y. 2006, 44, 1621–1623, doi:10.1016/j.carbon.2006.03.019.

[3] Iijima, S. Helical microtubules of graphitic carbon. Nature 1991, 354, 56–58, doi:10.1038/354056a0.

[4] Grady, B. P. Carbon Nanotube –Polymer Composites, Manufacture, Properties, and Applications; 2011; ISBN 9780470596418.

[5] Sahoo, N. G.; Rana, S.; Cho, J. W.; Li, L.; Chan, S. H. Polymer nanocomposites based on functionalized carbon nanotubes. Prog. Polym. Sci. 2010, 35, 837–867, doi:10.1016/j.progpolymsci.2010.03.002.

[6] Mahmood, N.; Islam, M.; Hameed, A.; Saeed, S.; Khan, A. N. Polyamide-6-based composites reinforced with pristine or functionalized multi-walled carbon nanotubes produced using melt extrusion technique. J. Compos. Mater. 2014, 48, 1197–1207, doi:10.1177/0021998313484779.

[7] Ma, P.-C.; Siddiqui, N. A.; Marom, G.; Kim, J.-K. Dispersion and functionalization of carbon nanotubes for polymer-based nanocomposites: A review. Compos. Part A Appl. Sci. Manuf. 2010, 41, 1345–1367,

doi:10.1016/J.COMPOSITESA.2010.07.003.

[8] Nanocyl TDS - NanoCyl NC7000 Available online: https://www.nanocyl.com/wpcontent/uploads/2016/07/DM-TI-02-TDS-NC7000-V08.pdf (accessed on Apr 1, 2019).

[9] Osorio, A. G.; Silveira, I. C. L.; Bueno, V. L.; Bergmann, C. P. H2SO4/HNO3/HCl—Functionalization

and its effect on dispersion of carbon nanotubes in aqueous media. Appl. Surf. Sci. 2008, 255, 2485–

2489, doi:10.1016/j.apsusc.2008.07.144.

[10] Men, X. H.; Zhang, Z. Z.; Song, H. J.; Wang, K.; Jiang, W. Functionalization of carbon nanotubes to

improve the tribological properties of poly(furfuryl alcohol) composite coatings. Compos. Sci. Technol.

2008, 68, 1042–1049, doi:10.1016/j.compscitech.2007.07.008.

[11] Sicomin TDS - SR GreenPoxy 33 / SZ 8525 Available online:

http://www.sicomin.com/datasheets/product-pdf1165.pdf.