The Effect of Delignification Time on \% Yield of Alpha-cellulose from Bamboo Fiber (Bambuseae) Properties

: Bamboo fiber (Bambuseae) has cellulose content that can be used as a filler in the composites. The objective of this study is to obtain alpha cellulose from bamboo fiber, through the isolation process. This study was carried out using the delignification method with NaOH solvent on temperature at 80 o C and the time variations of 30, 60, 90, 120, 180 minutes as the first stage of separation of alpha cellulose from other compounds contained in bamboo fiber. The results showed that the optimum condition of delignification time was 60 minutes with yield of 55.26%. The FTIR spectra was performed to confirm the formation of the product (alpha cellulose) proved by spectrum indicating the presence of the cellulose compound characterized by peak formation in 1641 cm -1 absorption area by comparing the cluster on the reaction alpha cellulose with the cluster on the bamboo fiber. XRD result showed that the crystalline portion of alpha cellulose was higher than amorf portion of alpha cellulose itself with the total amount of crystallinity index was 93.3%.