| dc.description.abstract | The manufacture of methyl cellulose is carried out through an etherification reaction between α-cellulose isolated from Corn Cobs (Zea mays L) and dimethyl sulfate. Isolation of α-cellulose with the addition of 3.5% HNO3, 2% NaOH and Na2SO3, 1.75% NaOCl, 17.5% NaOH and 10% H2O2, the α-cellulose obtained was 32 g (42.666% of initial weight). Methyl Cellulose is made by adding NaOH, isopropanol solvent and dimethyl sulfate. The temperatures used were 460C, 520C, 580C and dimethyl sulfate was used for various volumes of 2 mL, 4 mL and 6 mL. Methyl cellulose which has the highest degree of substitution of 0.92 at a temperature variation of 580C and a volume of 6 mL dimethyl sulfate. The formation of methyl cellulose was supported by the FT-IR spectrophotometer, namely the appearance of a vibration peak in the region of wave number 3295.4 cm-1 indicating the -OH group, the C-H group stretching at wave number 2892.4 cm-1, an absorption peak indicating the presence of C-O-C was found at wave numbers 1159.7 cm-1 and 1013.8 cm-1 where respectively are asymmetrical and symmetrical stretching vibrations. The results of surface morphology analysis with SEM showed that the fiber surface on methyl cellulose was smoother than cellulose. | en_US |
