CC BY-NC-ND 4.0Protz, RobertRobertProtzLehmann, AndréAndréLehmannBohrisch, JörgJörgBohrischGanster, JohannesJohannesGansterFink, Hans-PeterHans-PeterFink2022-03-065.2.20212021https://publica.fraunhofer.de/handle/publica/26606210.24406/publica-r-26606210.1016/j.carpta.2021.100041The direct dissolution and joint spinning of cellulose and lignin in BmimChc and EmimAc were investigated by using blends of dissolving pulp and kraft lignin as a model for subsequent processing real lignocellulosics wood-TMP and wheat straw. The solubility of cellulose and lignin in the solvents is represented by ternary phase diagrams. The limits of solubility for different cellulose/lignin ratios were found to be an approximately linear function of the lignin content. Air-gap spinning was realized for the model compound with up to 50 % lignin loading with both ionic liquids, whereas TMP and wheat straw could be processed acceptably only with BmimChc. The resulting bicomponent model fibers exhibit a rather high level of tenacity (33 to 46 cN/tex) and modulus (1500 to 2000 cN/tex). The cellulose fraction is dominating the fiber morphology while the lignin is incorporated in the core and somewhat leached out from the shell region.enbicomponent cellulose-lignin fibersstraw-based regenerated fibersionic liquidsphase diagramfiber morphology668journal article