Isolation of cellulose nanocrystals from Gigantochloa scortechinii ASAM pulp

Abstract

This study aims to characterize the cellulose nanocrystals (CNC) isolated from alkaline sulfite anthraquinone and methanol (ASAM) bamboo (Gigantochloa scortechinii) pulp. The hydrolysis was carried out using 64% (w/w) sulfuric acid at 45 °C for 45 min. The CNC was subjected to field emission scanning electronic microscopy (FESEM), X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and transmission electron microscopy (TEM). The measurement of diameter for CNC was done by FESEM and TEM, which was in the range of 10-20 nm. The XRD and FTIR results exhibited that bamboo CNC has higher crystallinity index, 78% compared to bleached ASAM bamboo pulp, 60%..

Recent Strategies in Preparation of Cellulose Nanocrystals and Cellulose Nanofibrils Derived from Raw Cellulose Materials

“…Sulfuric acid is the most typically used as it produces a negative surface charge on the particles which leads to more stable suspension. In general, the hydrolysis process needs the sulfuric acid concentration to be 60-65%, reaction temperature to be [40][41][42][43][44][45][46][47][48][49][50] ∘ C, and reaction time to be 30-60 min. However, the yield of CNCs is very low (less than 30 wt.%) due to the excessive degradation.…”