HPB—NH2接枝氧化棉纤维的制备及其染色性能

 为了实现棉纤维活性染料无盐染色工艺,采用高碘酸钠对棉纤维进行选择性氧化制得氧化棉纤维,以水溶性端氨基超支化合物(HPB—NH2)为改性剂与氧化棉纤维反应制得HPB—NH2接枝氧化棉纤维。讨论HPB—NH2接枝氧化棉纤维制备机制,并采用FT-IR证实了氧化棉纤维中的醛基与HPB—NH2中的端氨基发生了反应。采用活性染料对HPB—NH2接枝氧化棉织物进行染色试验并测试其染色性能。结果表明,HPB—NH2接枝氧化棉织物的得色量显著提高,耐摩擦色牢度、耐洗色牢度以及匀染性能都令人满意。

Preparation and dyeing properties of the HPB—NH2 grafted oxidized cotton fibers

In order to achieve salt-free dyeing of cotton fibers with reactive dyes,the oxidized cotton fibers were obtained firstly by selective oxidation with sodium periodate.Subsequently,the HPB—NH_2 grafted oxidized cotton fibers were prepared by the reaction between the oxidized cotton fibers and the water-soluble amino-terminated hyperbranched polymer(HPB—NH_2),which was used as a grafting agent in aqueous solution.The mechanism of preparing the HPB—NH_2 grafted oxidized cotton fibers was discussed and Fourier transform infrared spectrophotometry(FT-IR) analysis indicated that all the aldehyde group of the oxidized cotton fibers have reacted with amino groups of HPB—NH_2.Reactive dyes were used to dye the HPB—NH_2 grafted oxidized cotton fabrics and their dyeing properties were tested.Results demonstrated that HPB—NH_2 grafted oxidized cotton fabrics displayed markedly enhanced color yield,and the washing fastness,rubbing fastness and leveling properties were satisfactory.