A comparative CP/MAS 13C-NMR study of cellulose structure in spruce wood and kraft pulp

By E. Hult, P. Larsson, T. Iversen. 2000

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Cellulose crystallinity index: measurement techniques and their impact on interpreting cellulase performance (2010, methodology): “In some studies [37,38], a combination of Lorentzian and Gaussian functions was used to fit the C4 region (80 to 93 ppm) with seven peaks that range in full width at half height from 70 to more than 500 Hz.”
Characterization of the supermolecular structure of cellulose in wood pulp fibres (2003, methodology): “In the native secondary cell wall of softwood the fibrils are associated into larger fibril aggregates (Abe et al. 1991; Hafren 1999; Hult et al. 2000).”
Carbon-13 NMR evidence for cocrystallization of cellulose as a mechanism for hornification of bleached kraft pulp (2004, methodology): “That interpretation has been used to characterize the cross-sectional dimensions of crystalline domains and aggregates (Larsson et al. 1999; Hult et al. 2000, 2001; Duchesne et al. 2001).”
Comparative study of cellulosic components isolated from different Eucalyptus species (2018, background): “However, based on NMR, Hult et al. (2000) reported that cellulose became more crystalline after kraft pulping procedures but not necessarily from the preferential removal of small fibrils or disordered cellulose.”