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13C solid-state nuclear magnetic resonance and Fourier transform infrared studies of the thermal decomposition of cork
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Orientador(es)
Resumo(s)
The thermal decomposition of cork has been studied by Fourier transform infrared (FTIR) spectroscopy and 13C
solid-state nuclear magnetic resonance (NMR) spectroscopy with cross-polarization and magic-angle spinning
(CP-MAS), high-power ‘H decoupling (HPDEC) and cross-polarization depolarization-polarization (CPDP). Waxes
and other soluble components of cork begin to decompose at ca. 150°C. This is accompanied by partial decomposi tion of suberin, probably initiated at the points of attachment to the cell wall. The carbohydrates begin to decompose
at ca. 200°C. The decomposition of lignin begins at 250-3OO”C, while suberin undergoes further degradation.
Significant amounts of coke are formed in the process. At 400°C cork has been transformed into coke with traces of
partially decomposed suberin. The thermal decomposition of cork is dependent on the calcination time, particularly
in the 200-350°C range.
Descrição
Palavras-chave
Cork Thermal decomposition of cork 13C Solid-state nuclear magnetic resonance Fourier transform infrared studies . Faculdade de Ciências Exatas e da Engenharia
Contexto Educativo
Citação
Neto, C. P., Rocha, J., Gil, A., Cordeiro, N., Esculcas, A. P., Rocha, S., ... & Correia, A. F. (1995). 13C solid-state nuclear magnetic resonance and Fourier transform infrared studies of the thermal decomposition of cork. Solid state nuclear magnetic resonance, 4(3), 143-151.
Editora
Elsevier