羊毛的变性及变性羊毛阳离子染料染色

Modification of Wool and Dyeing with Basic Dye

羊毛经阴离子型活性变性剂处理后，纤维侧基上被引入阴离子型基因，具有和腈纶纤维类似的结构。因而，变性羊毛能够用阳离子染料染色。增大变性剂的分子量、共轭双键数及相对疏水性，变性羊毛用阳离子染料染色时上染速率和上染率均可显著地增大，染色牢度也大为改善，但对酸性染料产生防染作用。从变性羊毛的红外吸收光谱图上可看到，在波数为１１５０～１２６０ｃｍ－１、１０１０～１０８０ｃｍ－１和６００—７００ｃｍ－１处均出现磺酸基的特征吸收峰。变性剂和羊毛间形成共价结合成为纤维侧基的一部分。变性羊毛表面的电性能有较大变化，但其物理机械性能如减溶解度、弹性、断裂强度等基本不受影响。

he modification of wool with a series of reactive anionic modifier and then dyeing with basic dye were stidied. The analysis of the infrared spectrum shown that the wool fibre combines modifier with covalent bond. The anionic group was introduced in wool fibre after modifying,and its electric property and dyeing ability were chamged, It can therefor be dyed with basic dye and resist acid dye. The uptake of the basic dye for modified wool and the colour fastness are improved with the increases of the molecular weight, mumbers of conjugate double bond,and the relative hydrophobicity of the modifier.The optimum technology for dyeing modified wool with basic dye was determined. The strength, elongation and resilience of the modified wool were almost not affected.