A CHEMICAL PROCESS FOR PREPARING CELLULOSIC FIBERS HIERARCHICALLY FROM KENAF BAST FIBERS

摘要: The objective of this research was to evaluate an all-chemical process prepare nano-scale macro-scale cellulosic fibers from kenaf bast fibers, for polymer composite reinforcement. procedure used in included alkaline retting obtain single retted fiber, bleaching treatment delignified bleached and acidic hydrolysis both pure-cellulose microfiber cellulose nanowhisker (CNW). At each step chemical process, the resultant were characterized crystallinity using X-ray diffraction (XRD), functional groups Fourier Transform Infrared spectroscopy (FTIR), surface morphology scanning electron microscopy (SEM) transmission (TEM). components different scale analyzed. Based on raw yields 44.6% 41.4%. yield pure microfibers 26.3%. CNWs 10.4%, where about 22.6% α-cellulose had been converted into CNWs. fiber increased as decreased, 49.9% (retted fibers) 83.9% (CNWs). lengths 100 nm 1400 nm, diameters 7 84 aspect ratios 10 50. incorporation 9% (wt%) polyvinyl alcohol (PVA) composites tensile strength by 46%.