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Surfactant Assisted Incorporation of Single-Walled Carbon Nanotubes into a Chitosan-Polyvinylpyrrolidone Polymer

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A novel method for the incorporation of highly dispersed single-walled carbon nanotubes (SWNTs) into a chitosan matrix is reported. This was achieved through the use of a precursor SWNT dispersion in a biocompatible surfactant solution containing cetyl trimethylammonium bromide (CTAB) and polyvinylpyrrolidone (PVP). Once a desirable degree of dispersion was attained this precursor SWNT dispersion was mixed with a chitosan solution followed by chemical crosslinking of the chitosan. Vis/NIR and Raman spectra of several sections of the resulting solid nanocomposite material suggested uniform dispersion of SWNTs throughout the solid matrix. The mechanical properties of the nanocomposite were tested and compared to a material obtained using a similar protocol without the use of SWNTs. The results indicate that the presence of a relatively low amount (0.32 wt%) of SWNTs is enough to significantly increase the stiffness and elastic modulus of uncrosslinked chitosan by over 20 times.
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Keywords: CHITOSAN; CTAB; PVP; RAMAN; SINGLE WALLED CARBON NANOTUBES; UV/VIS NIR; YOUNG'S MODULUS

Document Type: Research Article

Publication date: 2011-12-01

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  • Journal of Nanoengineering and Nanomanufacturing is a multidisciplinary peer-reviewed international journal consolidating research activities in all experimental and theoretical aspects of nanoscale engineering and manufacturing science into a single and unique reference source. The main aim of this journal is to provide an international forum for scientists, engineers, researchers, and academicians working in the field of nanoscale science and engineering, nanomanufacturing science, processing technology and applications.
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