Dyeing of flax yarns via laccase-catalyzed polymerization of dopamine
In order to develop a mild and eco-friendly dyeing method for flax yarns,polydopamine is prepared using laccase as a catalyzer,and the flax yarn is dyed in one bath.The polymerization process and product structure of polydopamine under the catalytic oxidation of laccase are discussed,as well as mechanism of poly-dopamine linking to flax yarn.The results show that black polydopamine is formed by laccase-catalyzed with the orange by-product,which results in the dyed flax yarn showing a blackish-brown appearance.Polydopa-mine pigments are not only adsorbed on flax yarns through hydrogen bonds,but also grafted on flax yarns via dopamine monomer as a coupling agent,resulting in a dense and uniform coating on the surface of flax yarn.The color fastnesses to soaping of dyed yarns reaches Grade 3.
万方数据
维普
