Some authors suggest that after surface modification of the fibers, the presence of peaks in the region near to 450, 800 and 1100 cm−1 indicate that chemical bonding between cellulose and silica nanoparticles is taking place, since the band in 1100 cm−1 is assigned to Si–O–C stretching vibration . In this study, even when no precursors of the inorganic nanoparticles were used and no crosslinking agent or catalyst was used, the characteristic vibration bands of cellulose and silica were observed in these hybrid composites produced in a facile synthesis way.