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

POLYMER

卷:52

Article

Gunes, I. Sedat²  Perez-Bolivar, Cesar^3,4  Jimenez, Guillermo A.²  Celikbicak, Omur^1,5  Li, Fengyu^3,4  Anzenbacher, Pavel, Jr.^3,4  Wesdemiotis, Chrys⁵  Jana, Sadhan C.² 

[1] Hacettepe Univ, Dept Chem, TR-06800 Ankara, Turkey

[2] Univ Akron, Dept Polymer Engn, Akron, OH 44325 USA

[3] Bowling Green State Univ, Dept Chem, Bowling Green, OH 43403 USA

[4] Bowling Green State Univ, Ctr Photochem Sci, Bowling Green, OH 43403 USA

[5] Univ Akron, Dept Chem, Akron, OH 44325 USA

关键词: Nanocomposites;    Noncovalent interactions;    Carbon nanofiber;   

DOI  :  10.1016/j.polymer.2011.09.011

来源: Elsevier

【 摘 要 】

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.

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