The isolation of cellulose fib
r es requires the removal of o ther components such as lignin,
hemicellulose, and pectin from the biomass. In this st udy, the matured Leucaena leucocephala seeds
(LLS) was applied as a raw material to extract cellulose. The influence of sodium hydroxide
conc e ntration (2% 6%) on the structure of cellulose isolated LLS was studied. The highest yield
23.7% of cellulose wa s extracted using 4 wt% NaOH treatment The chemical physical properties of
cellulose extracted were characterized using Fourier Transform In f rared (FTIR), Field Emission
Scanning Electron Microscope (FES EM) and X ray Diffraction (XRD) XRD). FTIR spectrum indic ated that
of all treated samples shows the peaks of cellulose structure. The highest crystallinity index of
cellulose was obtained from 6% Na O H treatment which is 76.04%. Under FESEM images, the
cellulose appeared in fibrils like structure. The cellulose o btained can be further disintegrate to micro
and nano cel lulose to increase the chemical physical properties for various application such as i n
biocomposite, biomedicine and other value added chemicals.