Data/hora: 24/06/2024 00:54:27

Biblioteca(s): | Embrapa Instrumentação.
Data corrente: | 06/04/2005
Data da última atualização: | 06/04/2005
Autoria: | MARTINS, M. A.; FORATO, L. A.; COLNAGO, L. A.; MATTOSO, L. H. C.
Título: | Study of chemically modified sisal fibers by 13C high resolution solid state NMR.
Ano de publicação: | 2003
Fonte/Imprenta: | In: ENCONTRO LUSO-BRASILEIRO DE RMN, 2. set. 2003, Sintra, Portugal. Posters... Sintra, 2003. Ref. MS-P56.
Idioma: | Inglês
Conteúdo: | NMR is a versatile technique to study new materiaIs. It has been extensivelr employed to study the three major components of lignocellulosic materiais. However, literature shows few works applying NMR techniques for characterizing of chemical treatment on natural fibers. The solid-state 13C NMR in high resolution, CP-MAS (Cross Polarization Magic Angle Spinning) has proven to be invaluable to study complex organic solids. This approach renders the question of solubility irrelevant and eliminates the structural uncertainties associated with the dissolution processo Such CP-MAS technique permits detailed analysis of a complex organic solid in its natural state2. Among natural fibers, sisal is especially important due to its physico-chemical and mechanical properties, and the use this fiber as a reinforcement in composites has raised great interest3. Sisal is a hard fiber extracted from the leaves of the planto A sisal plant produces roughly 200-250 leaves, each containing 1000-1200 fibers. The length and diameter offiber are between 1.0-1.5 m, and 100-300 ~m, respectively3.
Palavras-Chave: | Fibras; RMN.
Thesagro: | Sisal.
Categoria do assunto: | --
Registro original: | Embrapa Instrumentação (CNPDIA)
Exemplares: | CNPDIA - (8799-1) - UPC - SP - -- - PROCI-03.00143 -  - 2003.00143 - DIS