氧化程度对端氨基超支化合物接枝氧化亚麻织物无盐染色性能的影响

Influence of oxidative degree on the salt-free dyeing behavior of HBP-NH_2 grafted oxidized linen fabric

用端氨基超支化合物(HBP-NH2)对选择性氧化后的亚麻织物进行接枝,再经活性染料染色.FT-IR证实氧化亚麻纤维中的醛基与HBP-NH2中的端氨基发生了接枝反应,结果表明:延长高碘酸钠氧化时间,氧化亚麻织物中醛基含量增加,越易与HBP-NH2发生接枝反应,提高无盐染色K/S值,但摩擦牢度(特别是湿摩擦牢度)逐渐降低,明度变暗,彩色度上升.

Selectively oxidized linen fabrics were grafted with amino-terminated hyperbranched polymer（HBP-NH2）and then dyed with reactive dyes.FT-IR confirmed that the aldehyde groups of the oxidized linen fibers reacted with the amino groups of HBP-NH2.The results showed that the aldehyde content of the oxidized linen fibers increased with the oxidation time of sodium periodate increasing,and subsequently increased the amount of the HBP-NH2 grafted to linen fiber.Consequently,the K/S value of salt-free dyeing was increased.The rubbing fastness（especially the wet rubbing fastness） gradually decreased,the lightness became dark and the chroma increased.