15 September 2014 Polymer-carbon nanotube composites: electrospinning, alignment and interactions
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The possibility of novel nanocomposite materials with dramatically improved properties requires fundamental studies of interactions. Full elucidation of these concepts will allow the tailoring of such systems for particular applications. Using near-edge X-ray absorption fine structure spectroscopy, we investigated interactions in electrospun poly(dimethylsiloxane)-poly(methyl methacrylate)-multiwall carbon nanotube composites. This paper describes these interactions through a building-block model, addresses their dependence upon filler size, and discusses electrospinning as an alignment solution. Though alignment of filler and polymeric chains was not observed spectrally, SEM imaging confirmed uniaxial carbon nanotube alignment in composite fibres. Spectra acquired at different incidence angles revealed differences in energy and intensity of resonances, suggesting conformational configurations. These differences were more significant in composites with larger nanofiller. This supported proposed models of CH-π interactions and hydrogen bonding as adhesion mechanisms.
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A. Douglas Winter, A. Douglas Winter, Eduardo Larios, Eduardo Larios, Faisal M. Alamgir, Faisal M. Alamgir, Cherno Jaye, Cherno Jaye, Daniel A. Fischer, Daniel A. Fischer, Eva M Campo, Eva M Campo, } "Polymer-carbon nanotube composites: electrospinning, alignment and interactions", Proc. SPIE 9170, Nanoengineering: Fabrication, Properties, Optics, and Devices XI, 91700H (15 September 2014); doi: 10.1117/12.2064905; https://doi.org/10.1117/12.2064905

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