CARBOPOL 118-2015-165

The reuse of wastepaper for the extraction of cellulose nanocrystals

The study reports on the preparation of cellulose nanocrystals (CNCs) from wastepaper, as an environmental
friendly approach of source material, which can be a high availability and low-cost precursor
for cellulose nanomaterial processing. Alkali and bleaching treatments were employed for the extraction
of cellulose particles followed by controlled-conditions of acid hydrolysis for the isolation of CNCs.
Attenuated total reflectance Fourier Transform Infrared (ATR FTIR) spectroscopy was used to analyze the
cellulose particles extracted while Transmission electron microscopy images confirmed the presence of
CNCs. The diameters of CNCs are in the range of 3–10 nm with a length of 100–300 nm while a crystallinity
index of 75.9% was determined from X-ray diffraction analysis. The synthesis of this high aspect ratio of
CNCs paves the way toward alternative reuse of wastepaper in the production of CNCs.