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Multiwalled carbon nanotubes functionalized with 7-octenyltrichlorosilane and n-octyltrichlorosilane: dispersion in Sylgard®184 silicone and Young’s modulus

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Abstract

Sylgard®184/multiwalled carbon nanotube (MWNT) composites have been prepared by in situ polymerization using purified and functionalized multiwalled carbon nanotubes (f-MWNTs) as fillers. Surface modification of the MWNTs has been carried out by silanization with 7-octenyltrichlorosilane (7OTCS) and n-octyltrichlorosilane (nOTCS). The modification and dispersion of the carbon nanotubes in composites were characterized by X-ray photoelectron spectroscopy (XPS), transmission electron spectroscopy (TEM), and high-resolution transmission electron spectroscopy (HRTEM). Young’s modulus results were derived from indentation testing. It is shown that the terminal-vinyl group of 7OTCS molecules plays an essential role for both the dispersion of the f-MWNTs in the composite and its mechanical properties. At loading as low as 0.2 wt%, the Young’s modulus is shown to increase up to 50%. This is interpreted as resulting from a combination of the good compatibility in the forming silicone matrix of the MWNTs coated with a siloxane network, on the one hand, and the covalent links created between the terminal-vinyl groups and the host matrix in formation, on the other hand.

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Acknowledgments

This study was supported through BINANOCO project (02/1/5221) of the Walloon Region and the “Belgian National Interuniversity Research Program on quantum size effects in nanostructure materials” (IUAP P5/01). J.-F.·C. is supported by the Belgian FNRS in his capacity as a postdoctoral researcher. The authors are grateful to Dr. F. De Buyl (Dow Corning, Belgium) for supplying Sylgard®184 and to Drs A. Destrée and N. Moreau for providing the raw CNTs used in this study.

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Authors and Affiliations

  1. Laboratoire de Chimie et d’Electrochimie des Surfaces, Facultés Universitaires Notre-Dame de la Paix, Rue de Bruxelles, 61, 5000, Namur, Belgium

    Laurence Vast, Antonio Fonseca, János B. Nagy, Zineb Mekhalif & Joseph Delhalle

  2. Microanalyse des Surfaces (MAS), DMA, Femto ST, 26 chemin de l’Epitaphe, 25030, Besançon Cedex, France

    Luc Carpentier

  3. Institut UTINAM UMR-Université de Franche Comté/CNRS-6213, équipe SRS, 16 route de Gray, 25030, Besançon, France

    Fabrice Lallemand

  4. EMA, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium

    Jean-François Colomer & Gustaaf Van Tendeloo

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  1. Laurence Vast
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  2. Luc Carpentier
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  3. Fabrice Lallemand
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  4. Jean-François Colomer
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  5. Gustaaf Van Tendeloo
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  6. Antonio Fonseca
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  7. János B. Nagy
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  8. Zineb Mekhalif
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  9. Joseph Delhalle
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Correspondence to Joseph Delhalle.

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Vast, L., Carpentier, L., Lallemand, F. et al. Multiwalled carbon nanotubes functionalized with 7-octenyltrichlorosilane and n-octyltrichlorosilane: dispersion in Sylgard®184 silicone and Young’s modulus. J Mater Sci 44, 3476–3482 (2009). https://doi.org/10.1007/s10853-009-3464-1

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  • DOI: https://doi.org/10.1007/s10853-009-3464-1

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