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Shear alignment of fullerenes in nanotubular supramolecular complexes

Shear alignment of fullerenes in nanotubular supramolecular complexes

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 / Department / Research Group: Faculty of Engineering & Science
Faculty of Engineering & Science > School of Engineering (ENN)
Last Modified: 19 Sep 2020 00:20
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
Selected for GREAT 2019: None
Selected for REF2021: None
URI: http://gala.gre.ac.uk/id/eprint/25784

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