Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 443, Issue -, Pages 19-26Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfa.2013.10.053
Keywords
Multiwalled carbon nanotubes; Poly-L-lysine; Functionalization; Dispersion
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Funding
- Science and Technology Commission of Shanghai Municipality [13NM1401502]
- Shanghai Municipal Education Commission [13ZZ052]
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Poly-L-lysine (PLL) was synthesized using lysine as raw material by N-carboxyanhydride polymerization and characterized by Fourier transform infrared spectroscopy and H-1 NMR. Multiwalled carbon nanotubes (MWCNTs) were non-covalently functionalized using PLL in order to prepare MWCNTs-PLL composite. MWCNTs-PLL was characterized using Fourier transform infrared spectroscopy, thermogravimetric analysis and UV-Vis absorption spectroscopy. The dispersion of MWCNTs-PLL composite was investigated by UV-Vis absorption spectroscopy, dynamic light scattering analysis and digital photograph. The results showed that the dispersion of MWCNTs-PLL composite was obviously better than that of MWCNTs-SDS composite in water while it was also approximate with that of MWCNTs-SDBS. In addition, MWCNTs-PLL was pH-responsive in water so that it could be used as bio-nanomaterial in future. (C) 2013 Elsevier B.V. All rights reserved.
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