Abstract
Dopamine is considered to have great potential in the field of immobilized enzymes due to its excellent biocompatibility and simple immobilization process. Herein, we propose a new shrink-resist treatment strategy for wool. The catechin in the dopamine structure is chemically cross-linked with the amino group in the enzyme molecule to control the hydrolysis reaction on the fiber surface. At the same time, using the characteristics of dopamine self-polymerization, excessive polydopamine is polymerized on the surface of wool fibers, forming multiple interactions between dopamine, protease, and wool. The structure and morphology of protease and polydopamine-protease-treated wool fibers were characterized by FTIR and scanning electron microscopy, and the effect of dopamine on protease activity was studied. Compared with untreated wool, this effective method can significantly improve the dimensional stability (2.34%) and wettability of wool fabric to felt, and can also make up for the strength loss caused by protease. However, affected by the color of dopamine itself, the treated wool is light gray, and the K/S value reaches 2.988. This study provides a new way for enzymatic modification of keratin-containing fibers such as wool using dopamine and other natural biopolymers with similar structures.
Published Version
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