| dc.description.abstract | The manufacture of methyl cellulose was carried out through an etherification reaction between α-cellulose isolated from pineapple leaves (Ananas Cosmosus.L) with dimethyl sulfate. Isolation of α-cellulose was carried out by adding a solution HNO3 3,5%, NaOH 2% and Na2SO3, NaOCl 1,75%, NaOH 17,5% and H2O2 10% then yielded 26,76 g of α-cellulose (35,68% of the initial weight). Methyl Cellulose was made by adding 5 g of α-cellulose which was added with NaOH 10%, Isopropanol then etherification using dimethyl sulfate at various temperature of 400C, 460C, 520C for 3 hours to produce 4,88 g; 4,95 g; 4,96 g. The result of the production of methyl cellulose were analyzed by FT-IR spectrophotometer, morphological and surface analysis using SEM, and degree of substitution. Methyl Cellulose which has the highest degree of substitution at a temperature variation of 520C is equal 0,86. The formation of methyl cellulose is supported by an FT-IR spectrophotometer, namely the appearance of a vibration peak in the area of wave number 3280,1 cm-1 which indicates -OH group, at wave number 2892,4 cm-1 indicates the presence of C-H stretching group, Absorption peaks indicating the presence of C-O-C were found at wave numbers 1147,1 cm-1 and 1021,3 cm-1 which are asymmetrical and symmetrical stretching vibrations. The result of the morphological analysis showed that the surface of the fiber on cellulose was smoother than that of methyl cellulose. | en_US |
