C-13 SOLID-STATE NUCLEAR-MAGNETIC-RESONANCE AND FOURIER-TRANSFORM INFRARED STUDIES OF THE THERMAL-DECOMPOSITION OF CORK
authors NETO, CP; ROCHA, J; GIL, A; CORDEIRO, N; ESCULCAS, AP; ROCHA, S; DELGADILLO, I; DEJESUS, JDP; CORREIA, AJF
journal SOLID STATE NUCLEAR MAGNETIC RESONANCE
keywords PLANT POLYESTER DYNAMICS; POTATO CELL-WALL; CROSS POLARIZATION; SPECTROMETRY; RELAXATION; CUTIN; WOOD
abstract The thermal decomposition of cork has been studied by Fourier transform infrared (FTIR) spectroscopy and C-13 solid-state nuclear magnetic resonance (NMR) spectroscopy with cross-polarization and magic-angle spinning (CP-MAS), high-power H-1 decoupling (HPDEC) and cross-polarization depolarization-polarization (CPDP). Waxes and other soluble components of cork begin to decompose at ca. 150 degrees C. This is accompanied by partial decomposition of suberin, probably initiated at the points of attachment to the cell wall. The carbohydrates begin to decompose at ca. 200 degrees C. The decomposition of linin begins at 250-300 degrees C, while suberin undergoes further degradation. Significant amounts of coke are formed in the process. At 400 degrees C cork has been transformed into coke with traces of partially decomposed suberin. The thermal decomposition of cork is dependent on the calcination time partly in the 200-350 degrees C range.
publisher ELSEVIER SCIENCE BV
issn 0926-2040
year published 1995
volume 4
issue 3
beginning page 143
ending page 151
digital object identifier (doi) 10.1016/0926-2040(94)00039-F
web of science category Chemistry, Physical; Physics, Atomic, Molecular & Chemical; Physics, Condensed Matter; Spectroscopy
subject category Chemistry; Physics; Spectroscopy
unique article identifier WOS:A1995QN62500002
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journal impact factor 1.846
5 year journal impact factor 2.124
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