选择性氧化壳聚糖硅衍生物改性羊毛织物的染色

Dyeing of wool fabrics modified with selective oxidation chitosan silicon derivatives

采用高碘酸钠氧化壳聚糖制备选择性氧化壳聚糖，以硅烷偶联剂KH550为交联剂，处理经氧等离子体刻蚀的羊毛织物，研究改性羊毛的染色性能。结果表明：改性羊毛织物的可染性提高，因为氧化壳聚糖硅衍生物与羊毛之间发生了共价交联，在纤维表面引入了-OH、-NH2、-COOH等活性基，与染料分子之间的作用增强。另外，酸性条件下预处理，硅烷偶联剂KH550水解缩合，在氧等离子体刻蚀羊毛表面形成一层薄膜，增大纤维的表面积，也能有效促进染料的上染。在所研究的4种染料中，当弱酸性红B和活性黑KN-B染色温度为70℃，酸性大红G和活性红M-3B染色温度为50℃，酸性大红G和弱酸性红B的染液pH分别为1.81和2.56，活性黑KN-B和活性红M3B在中性条件下染色，改性羊毛表面可获得较高的K/S值，同时染色牢度也获得一定程度的改善。

Selective oxidation chitosan was prepared with chitosan oxidized by sodium periodate, silicon coupling agent KH550 was used as crosslinking agent , and oxygen plasma corrosion wool fabrics were treated with the selective oxidation chitosan and silicate couple agent. The dyeing properties of the modified wool fabrics were studied. The results indicated that the dyeability of the modified wool was improved, because covalent crosslinking generated between selective oxidation chitosan silicon derivatives and wool, active groups like-OH,-NH2 and-COOH etc. were introduced onto fiber surfaces. Additionally, a thin film formed on oxygen plasma corrosion modified wool surfaces, after acidic pretreatment and KH550 hydrolytic condensation, which made fiber surfaces increased, and can also effectively promote the dyeability. Among the studied four dyes, for Weak Acid Red B and Reactive Black KN-B, When dyeing temperature was 70℃ , for Acid Scarlet G. and Reactive Red M-3B, when dyeing temperature was 50℃ , dye liquor pH of was 1.81 and 2.56 respectively for Acid Scarlet G and Weak Acid Red B, Reactive Black KN-B and Reactive Red M-3B were dyed under neutral conditions, higher K/S values could be obtained for the modified wool surfaces, while the color fastness was also improved in a certain degree.