C-13 SOLID-STATE NUCLEAR-MAGNETIC-RESONANCE AND FOURIER-TRANSFORM INFRARED STUDIES OF THE THERMAL-DECOMPOSITION OF CORK

被引：85

作者：

NETO, CP ^{[1
]}

ROCHA, J ^{[1
]}

GIL, A ^{[1
]}

CORDEIRO, N ^{[1
]}

ESCULCAS, AP ^{[1
]}

ROCHA, S ^{[1
]}

DELGADILLO, I ^{[1
]}

DEJESUS, JDP ^{[1
]}

CORREIA, AJF ^{[1
]}

机构：

[1] UNIV AVEIRO, DEPT CHEM, P-3800 AVEIRO, PORTUGAL

来源：

SOLID STATE NUCLEAR MAGNETIC RESONANCE | 1995年 / 4卷 / 03期

关键词：

D O I：

10.1016/0926-2040(94)00039-F

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：143 / 151

页数：9

共 16 条

[1]

BENTO MF, 1992, INT J MASS SPECTROM, V112, P191

[2] C-13 NUCLEAR MAGNETIC-RESONANCE STUDY OF SUBERIZED POTATO CELL-WALL [J].