The crystallinity and structural features of the NaOH-treated and untreated wood species were examined using a Fourier transform infrared (FTIR) spectrometer (Bruker Tensor 27 FT-IR) equipped with a universal ATR (Attenuated Total Reflection) accessory and DTGS detector. Its spectra were obtainedwith an average of 64 scans and a resolution of 2 cm1, in the rangeof 600–4000 cm1.