Jiangnan University researchers extracted melanin from cuttlefish ink sacs and added it to ordinary polyurethane materials. They found that it can significantly improve the mechanical properties of polyurethane materials, such as tensile strength. Performance and toughness. Research shows that even if only 2% of melanin is added to the final cured polyurethane foam, its toughness is increased to 10 times that of ordinary polyurethane foam. In this study, the elongation before fracture of the PU material before modification was 770 %, and after adding melanin to the material, the elongation at break increased to 1880%, and the mechanical properties were significantly improved.
In addition, researchers compared the effects of other reinforcing materials such as carbon nanotubes, graphene and cellulose and found that melanin enhanced PU with the best effect.
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