Abstract
Feathers, a form of keratin, are available in large quantities as a waste in many countries. They could be a potential source of polyamides if suitable methods for the dissolution and regeneration of the keratin were developed. A series of distillable N,N-dimethylethanolammonium cation-based protic ionic liquids (PILs) have been investigated in this work for use as processing solvents for this material. N,N-dimethylethanolammonium formate ([DMEA][HCOO]) is shown to dissolve keratin to an extent of 150 mg per gram of solvent. Recovery of the regenerated keratin material is easily achieved by the addition of methanol. We also demonstrate distillation and recovery of the ionic liquid from the dissolved keratin.
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