SYNTHESIS AND CHARACTERIZATION OF NEW IONIC LIQUIDS AND ITS POTENTIAL APPLICATIONS FOR BAMBOO BIOMASS

After complete dissolution of bamboo in [Emim]Gly, the separation of bamboo
constituents into cellulose rich-material, hemicelluloses and lignin was possible, via
selective solvent precipitation method using acetone/water mixture (7 /3 v/v) and
ethanol. The individual constituent was confirmed by FTIR, NMR, HPLC, TGA and
CHNS analysis. In terms of efficiency of lignin extraction, the nitrile-based ionic
liquids containing Cl perform well compared to [Bmim]Cl. The ionic liquids in the
order of increasing extraction efficiency are [Bmim]Cl < [CzCNBim]Cl <
[CzCNHEim]Cl < [CzCNAim]Cl < [CzCNBzim]Cl. The increase in heating
temperature and time increases lignin extraction, while the increase in particle size
and amount of sample loading reduces the extraction efficiency of nitrile-based ionic
liquids.