Morphological, characterization and FTIR analysis of delignified pineapple leaves as raw material for cellulose production

Lignocellulose is an abundant natural polysaccharide component containing cellulose, hemicellulose and lignin. Pineapple leaves contain high levels of cellulose and their utilization as abundant plantation waste is still not optimal. The delignification process was carried out to isolate cellulose and remove lignin contained in pineapple leaf fibers. This study aims to obtain high purity cellulose and analyze the effect of delignification on morphology and FT-IR results. In this study, the pineapple leaf fiber used underwent a delignification process by adding a Deep Euteutic Solvent (DES) solvent consisting of a mixture of Choline chloride (ChCl): formic acid (1:2). The cellulose obtained was characterized by morphology and analyzed using FT-IR. FTIR pineapple leaf fiber with delignification treatment still contained lignin in the absorption area around 1600cm-1 with C=C aromatic group as shown from the peak on the FTIR graph, fiber and it was clarified in the morphology of pineapple leaves which showed that the fiber surface was smoother and looked less lignin. In this study it can be concluded that the delignification process that has been carried out can remove lignin from the material.