关键词: 聚酯纤维, 聚酯织物, 聚多巴胺, 色牢度, 亲水性

Abstract: Aiming at the problems of the poor hygroscopicity and difficulty in dyeing of polyester fibers, dopamine (DA) was used as the raw material to prepare the modified and colored polyester fibers and fabrics by self-polymerization and deposition of DA on polyester fiber in the CuSO₄/H₂O₂ system. The modified polyester fibers were characterized by polarized optical microscope (POM) and scanning electron microscope (SEM), and the hydrophilicity and color fastness of the polyester fabrics were tested by contact angle measurement instrument, washing fastness tester and rotation friction tester, etc. The results showed that polydopamine (PDA) was deposited on the surface of the fiber when the polyester fiber was treated with 3 g/L of dopamine, which made the polyester fiber brown-black. Besides, the water contact angle of the dopamine-treated polyester fabric was 58°, which was significantly lower than that of the fabric without dopamine treatment(120°), and the hydrophilicity was significantly improved. At the same time, the tensile strength of the polyester fiber treated with 3 g/L DA was 0.1133 N/tex, which was slightly higher than that of the untreated polyester fiber (0.1040 N/tex). The dry and wet rubbing discoloration fastness as well as washing discoloration fastness of the dopamine-treated polyester fabric reached above 3.5 grade, which indicated that the dopamine-treated polyester fibers had good color fastness. This study provides a new thought and method for the preparation of hydrophilic colored polyester fibers.

Key words: polyester fiber, polyester fabric, polydopamine, color fastness, hydrophilicity