The Fourier transform infrared spectroscopy (FT-IR) spectra of modified NCF were recorded using a Spectrum 100 Series(PerkinElmer Ltd, Beaconsfield, BUCKS, United Kingdom) equipped with an attenuated total reflectance (ATR) device for solids ana lysisand a high linearity lithium tantalite (HLLT) detector, in transmission mode, at 2 cm−1 resolution and 32 scans.