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

作者：Gunes I Sedat; Perez Bolivar Cesar; Jimenez Guillermo A; Celikbicak Omur; Li Fengyu; Anzenbacher Pavel Jr; Wesdemiotis Chrys; Jana Sadhan C^*

来源：Polymer, 2011, 52(23): 5355-5361.

DOI：10.1016/j.polymer.2011.09.011

• Nanocomposites
• Noncovalent interactions
• Carbon nanofiber

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.

• 出版日期2011-10-27