| dc.description.abstract | Isolation of cellulose from sago waste has been successfully performed in this research. Through several steps, namely removal of extractive compounds, removal of starch, and removal of hemicellulose. The starch removal from free-extractive sample by extraction with water at 80 °C required a lot of water and time. By using HCl 3% at 80 °C, less time was needed. The yield of free-starch samples obtained from hot water extraction was 41.5%, higher than the product of HCl 3% extraction, which was 26.3%. Cellulose was also hydrolized with HCl 3%, in accordance with the appearance of C=O absorption in the fourier transform infrared (FTIR) spectrum. Lignin content after delignification with 0.75, 1, and 1.5% H2O2 were 22.2, 18.7, and 14.6% while the yield were 43.6, 41.4, and 39.4%, respectively. FTIR spectrum of cellulose isolated with starch removal method using water was more similar to the commercial cellulose than cellulose which starch removal method used HCl 3%. | en |
