Preparation of regenerated wool keratin films from wool keratin–ionic liquid solutions

The regenerated wool keratin films were prepared from the wool keratin/ionic liquid solutions through water, methanol and ethanol as coagulation solvents in this article. It could be suggested from the results that [AMIM] + ·Cl − ionic liquid has higher solubility for wool keratin fibers than [BMIM] + ·Cl − ionic liquid. IR data showed the part of the disulfide bonds was broken during the dissolution. It could be seen from XRD data that the regenerated films exhibited a β‐sheet structure and the disappearance of the α‐helix structure. TGA curves indicated that the thermal stability of regenerated wool keratin films decreased slightly compared to nature wool fibers.