Analysis of energy transfer and ternary non-covalent filler/matrix/UV stabilizer interactions in carbon nanofiber and oxidized carbon nanofiber filled poly(methyl methacrylate) composites

Gunes I. S., Perez-Bolivar C., Jimenez G. A., ÇELİKBIÇAK Ö., Li F., Anzenbacher P., ...More

POLYMER, vol.52, no.23, pp.5355-5361, 2011 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 52 Issue: 23
  • Publication Date: 2011
  • Doi Number: 10.1016/j.polymer.2011.09.011
  • Journal Name: POLYMER
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.5355-5361
  • Keywords: Nanocomposites, Noncovalent interactions, Carbon nanofiber, STYRENE-ACRYLIC-ACID, ULTRAVIOLET STABILIZERS, NANOCOMPOSITES, POLYMERS, SOLVENT, BLENDS, PMMA
  • Hacettepe University Affiliated: Yes

Abstract

Ternary non-covalent interactions between carbon nanofibers (CNFs), oxidized carbon nanofibers (ox-CNFs), poly(methyl methacrylate) (PMMA) chains, and benzotriazole-containing UV stabilizers were analyzed using Fourier-transform infra red spectroscopy (FTIR), time-resolved fluorescence emission spectroscopy, and fluorescence lifetime imaging microscopy. The results indicated that PMMA chains form hydrogen bonds both with ox-CNF fibers and the UV stabilizer molecules. It was also determined that UV stabilizers strongly interact with CNF particles via pi-pi interactions. The extent of pi-pi and hydrogen bonding interactions was determined to be lower between ox-CNF particles and UV stabilizers due to less perfect graphitic structure of the former. The morphology of the composites indicated that the hydrogen bonds between PMMA chains and ox-CNF particles resulted in highly improved state of filler dispersion in ox-CNF/PMMA composites. (C) 2011 Elsevier Ltd. All rights reserved.