Pembuatan Metil Selulosa dari Selulosa Tongkol jagung (Zea mays L) dengan Dimetil Sulfat (DMS) pada Variasi Volume DMS dan Temperatur

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.