Sintesis Selulosa Asetat Berbahan Dasar Tongkol Jagung sebagai Material Membran dengan Variasi Jumlah Asam Asetat

Abstract

The objectives of this study were to analyze the effect of acetic acid volume on the characteristics of cellulose acetate from corn cobs formed and to determine the performance of cellulose acetate membranes. Cellulose is obtained from the process of isolating it from corn cobs by delignification and bleaching. Cellulose acetate is obtained from the synthesis of cellulose acetate. Variations in the amount of glacial acetate acid used are 5 mL; 7.5 mL; 10 mL; and 12.5 mL during the deacetylation process. The characterization of cellulose acetate was carried out by determining the acetyl content, degree of substitution, FTIR, solubility, and molecular weight. The results showed that the volume of acetic acid affected the characteristics of the resulting cellulose acetate. Variation in amount of glacial acetic acid are 5; 7.5; and 10 mL produces cellulose acetate with the type of cellulose diacetate while the amount variation of 12.5 mL glacial acetic acid includes cellulose monoacetate. The molecular weight of the synthesized cellulose acetate decreased with the addition of acetic acid. The FTIR spectrum of the synthesized cellulose acetate showed the same functional group peaks as commercial cellulose acetate. The obtained cellulose diacetate is used in the manufacture of ultrafiltration membranes. Based on the research results, the synthetic/commercial cellulose acetate membrane has a flux value of 36.38 L/m2.hour and a permeability coefficient of 5.91 L/hour.m2.barr.