Kincer, Matthew R., Choudhury, Rudra, Srinivasarao, Mohan, Beckham, Haskell W., Briggs, G. Andrew D., Porfyrakis, Kyriakos ORCID: 0000-0003-1364-0261 and Bucknall, David G. (2014) Shear alignment of fullerenes in nanotubular supramolecular complexes. Polymer, 56. pp. 516-522. ISSN 0032-3861 (doi:https://doi.org/10.1016/j.polymer.2014.11.058)

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Abstract

Supramolecular complexes of C60 and C70 encapsulated within the cavity created by the helical superstructure of syndiotactic poly(methyl methacrylate) (s-PMMA) were aligned by elevated-temperature electrospinning. Using 13C solid-state NMR, encapsulation of C60 within the nanotubular cavity was confirmed by downfield chemical shifts and significantly shorter spinespin relaxation times compared to C60 physically mixed with s-PMMA. Thermal analysis revealed a melting endotherm at 180C for the C60/s-PMMA electrospun fibers that is consistent with formation of the nanotubular supramolecular complex. Based on the syndiotactic content of the s-PMMA and the gravimetrically determined fullerene content in the electrospun fibers, 82% of the nanocavity is filled with C60, dropping to 55% filling with C70. The fibers were macroscopically aligned by electrospinning onto a split collector plate for analysis of molecular alignment. Wide-angle X-ray scattering azimuthal scans revealed high degrees of molecularlevel alignment, with an order parameter of 0.70 for the C60/s-PMMA nanopods.

Item Type:	Article
Uncontrolled Keywords:	fullerene encapsulation, helical sPMMA, electrospinning alignment
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science Faculty of Engineering & Science > School of Engineering (ENG)
Last Modified:	19 Sep 2020 00:20
URI:	http://gala.gre.ac.uk/id/eprint/25784

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