Efficient separation of cellulose from bamboo by organic alkali

This study focuses on the effective separation of cellulose from bamboo through a two-step process. Several organic alkalies 2-pyrrolidinone, ethylurea, dibutylamine, N-methylformamide and tetramethyl guanidine were used to remove lignin isolate massive bamboo. The results showed that can effectively hemicellulose while retaining almost all in residual solid. removal achieved 86.0 84.0% after heating for 3 h at 150 °C, respectively. Subsequently, final increased 91.5 93.8%, respectively, simple alkaline H2O2 bleach treatment. Interestingly, loss was very small treatments, 96.9% component still retained. crystallinity 69.8–75.2% X-ray diffraction graphs due hemicellulose. Scanning electron microscopy images indicated diameter bundles decreased 80–100 µm about 50 alkali treatment, then fiber bundle completely separated into single long with 10 bleaching. Fourier transform infrared spectroscopy spectra confirmed high selective Two-dimensional 1H-13 C Heteronuclear singular quantum correlation analyzed investigate structure found only signals –OCH3, Cγ–Hγ β-O-4’ (Aγ) β-β’ (Cγ) structures C5-H5 guaiacyl (G5) did not disappear