CP/MAS C-13-NMR spectroscopy applied to structure and interaction studies on cellulose I

Solid-state Cross-Polarization Magic Angle Spinning Carbon-13 Nuclear Magne tic Resonance (CP/MAS C-13-NMR) has been used to investigate the structure and interactions of cellulose I. The use of spectral fitting for the extrac tion of information from CP/MAS C-13-NMR spectra is reviewed and results ob tained are discussed. Examples are shown where the method has been used to monitor the structural changes occurring in wood cellulose during kraft pul ping. The effects observed on the cellulose and hemicelluloses are further investigated using a model system. Assignments of signal intensities origin ating from xylan-cellulose interactions are made. (C) 1999 Elsevier Science B.V. All rights reserved.