Dissolution of Pinus radiata and Eucalyptus globulus woods in ionic liquids under microwave radiation: Lignin regeneration and characterization

► Lignin regeneration from wood dissolved in ionic liquids is studied. ► Regenerated lignin is analyzed by FTIR, 13C NMR, elemental analysis, TGA and DSC. ► Microwave radiation decreases wood dissolution time compared to thermal heating. ► Lignin can be regenerated from solutions of wood in chloride-based ionic liquids. ► Regenerated lignin shows different properties depending on the ionic liquid used.