Shear alignment of fullerenes in nanotubular supramolecular complexes

Matthew R. Kincer, Rudra Choudhury, Mohan Srinivasarao, Haskell W. Beckham, G. Andrew D Briggs, Kyriakos Porfyrakis, David G. Bucknall

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Supramolecular complexes of C60 and C70 encapsulated within the cavity created by the helical super-structure 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 spin-spin relaxation times compared to C60 physically mixed with s-PMMA. Thermal analysis revealed a melting endotherm at 180 °C 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.

Original languageEnglish
Pages (from-to)516-522
Number of pages7
JournalPolymer
Volume56
DOIs
Publication statusPublished - 15 Jan 2015

Keywords

  • Fullerene encapsulation
  • Helical sPMMA
  • Electrospinning alignment
  • SYNDIOTACTIC POLY(METHYL METHACRYLATE)
  • POLYMER SOLAR-CELLS
  • C-60
  • N-AT-C-60
  • NANOFIBERS
  • SOLVENTS
  • FIBERS
  • PMMA
  • ENCAPSULATION
  • TEMPERATURE

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics

Cite this

Kincer, M. R., Choudhury, R., Srinivasarao, M., Beckham, H. W., Briggs, G. A. D., Porfyrakis, K., & Bucknall, D. G. (2015). Shear alignment of fullerenes in nanotubular supramolecular complexes. Polymer, 56, 516-522. https://doi.org/10.1016/j.polymer.2014.11.058