4.1. FT-IR analysis
Typical FT-IR spectra of OPEFB-pulp, OPEFB-MCC and C-MCC
are shown in Fig. 1. The vibrational assignments are summarized
in Table 1. All samples display two main absorbance regions as
reported by Rosa et al. (2012) and Fahma et al. (2010). These
regions are found at high wavenumbers (2800–3500 cm−1) and low
wavenumbers (500–1700 cm−1), respectively. FT-IR spectroscopy
revealed the similarities between all spectra which is an indication
that all samples have similar chemical compositions. Comparable
results have been obtained by Wanrosli, Rohaizu, et al., 2011, who
compared OPEFB-MCC with pure cellulose before regeneration into
cellulose phosphate. Another study also obtained similar results