The spectra for
the materials are displayed in Fig. 2. The results were qualitatively
in accordance with the indices calculated from the XRD spectra: for
Fig. 4. The viscosity change as a function of the fibrillation process time for carrot
and BSG residues.
the carrot, the crystallinity indexes were higher in value, with 89%
before grinding and 85% after the process, while for the BSG residue,
the indexes were found to be somewhat lower, at 81% and 82%,
respectively. The Raman measurements also provided information
about the structural differences between the two materials and the
influence of grinding. Both the bleached carrot and BSG spectra
displayed typical peaks for cellulose, i.e., at 1095 cm−1 in the range
of 300–520 cm−1, at 1120 cm−1 in the range of 1260–1470 cm−1
and at 2897 cm−1 (Wiley and Atalla., 1987; Schenzel and Fischer,
2001).