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
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Autores: | , , , , , , |
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Formato: | artículo |
Data de Publicação: | 2011 |
Descrição: | 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 p-p interactions. The extent of p-p 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. |
País: | Repositorio UNA |
Recursos: | Universidad Nacional de Costa Rica |
Repositorio: | Repositorio UNA |
Idioma: | Inglés |
OAI Identifier: | oai:https://repositorio.una.ac.cr:11056/18873 |
Acesso em linha: | http://hdl.handle.net/11056/18873 |
Access Level: | acceso abierto |
Palavra-chave: | POLÍMEROS NANOTECNOLOGÍA QUÍMICA NANOCOMPOSITES NONCOVALENT INTERACTIONS CARBON NANOFIBER |