CD Tugas Akhir
Pemisahan Dan Pemurnian Selulosa Dari Limbah Daun Nanas (Ananas Comosus) Secara Semi Mekanis
ABSTRACT
Cellulose (C6H10O5)n is one of the long-chain polymers of polysaccharides prepared from saw-monomer β -glucose. Cellulose is the principal carbohydrate synthesized by plants dan occupies almost 60% of the components of plant structure. The purpose of this study is to extract cellulose from the pineapple wastes semi-mechanical and obtain cellulose powder by the methods of delignification, bleaching, and hydrolysis. The process of cellulose removal from the pineapple leaves is done through the mechanical preparatory separation of the pineapple leaves and purification by delignification with NaOH 1 M, bleaching with variations in NaOCl concentrations of 3%, 5%, and 7% and hydrolysis with HCL 3%. After three stages of chemical treatment of the cellulose from the pineapple leaf, FTIR analysis indicates the three main absorption areas in the succession of some 3334.92; 2897.08; 1653.64 cm-1 which shows O-H stretching, C-H stretching, and C=C bending . The absorption areas suggest that cellulose has been produced and the slight absorption of lignin. Chemical and physical analysis of the rendemen in quick succession of 66.3; 63.8 and 61.9%. The pineapple leaf cellulose contains a water level of 9.5; 6.5 and 5.5%. The highest holocellulose comes from a 5% variation of 88.6% and the highest alpha-cellulose is a 3% variation of 93.9%.
Keywords:Pinapple leaf, alpha-cellulose, holocellulose, delignification, bleaching
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