Characterization of Cellulose Nanocrystals Derived from Umbrella Plant (Cyperus alternifolius Linn.)

Main Article Content

Marcelino R. Tradio Jr.
Brian John Sarno

Abstract

Plant–based nanocrystals have gained wide research interest due to its application in nano–reinforcement. Hence, the study investigated the stems of umbrella plant as potentials source of cellulose fibers to synthesize cellulose nanocrystals (CNCs). The synthesis of CNCs were conducted using acid hydrolysis with 10 mL 64% w/w sulfuric acid for each gram of purified cellulose at 45°C for 30 min. The surface morphology, structural, physical and thermal properties of CNCs were characterized using field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), Fourier Transform Infrared spectroscopy (FTIR), X–ray diffractometer (XRD), and simultaneous thermal analyzer, respectively. The result showed that the CNCs were mixture of rod–like shape and spherical morphology. The CNC rods were less than 20 nm width and 200–300 nm length when viewed under FESEM. However, the CNC rods were shorter when viewed under TEM and had a width less than 5 nm and length between 20–50 nm. The spherical CNCs that were seen only under TEM were less than 20 nm in diameter. The FTIR spectra showed that the CNCs were composed of crystalline cellulose I wherein the molecular structure of cellulose was preserved after the hydrolysis. The XRD patterns showed that the CNCs were highly crystalline with crystallinity index value of 94.48%. Lastly, the CNCs exhibited a three–stage thermal decomposition behavior.

Keywords:
Umbrella plant, Cyperus alternifolius, cellulose nanocrystals.

Article Details

How to Cite
Jr., M. R. T., & Sarno, B. J. (2020). Characterization of Cellulose Nanocrystals Derived from Umbrella Plant (Cyperus alternifolius Linn.). International Research Journal of Pure and Applied Chemistry, 21(18), 33-42. https://doi.org/10.9734/irjpac/2020/v21i1830269
Section
Original Research Article

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