三乙烯四胺改性腈纶的酸性深蓝5R染色

Dyeing of triethylene tetramine modified acrylic fiber with Acid Dark Blue 5R

为提高腈纶酸性染料染色性能,采用三乙烯四胺对腈纶纤维进行接枝改性。探究了NaCl和染料用量、pH值、染色温度、染色时间对改性腈纶酸性深蓝5R染色性能的影响,并分析了其吸附动力学和热力学特性,测试了酸性染料的上染百分率和K/S值。结果表明,在100℃条件下,当染料质量分数为2%(omf),pH值5,保温染色40 min时,改性腈纶酸性深蓝5R的上染百分率可达到99.86%;染料上染改性腈纶的速率很快,其吸附符合Langmuir+Nernst热力学吸附模型。

In order to improve the dyeing performance of acrylic fiber with acid dyes, acrylic fiber is modi- fied by triethylene teramine. The effects of the concentrations of NaCl and dyes, pH value, dyeing temperature and time on dyeing properties of modified acrylic with Acid Dark Blue 5R are studied, the dyeuptake and K/S value are tested, and its adsorption kinetic and thermodynamic characteristic is analyzed. The results show that the dye-uptake can reach 99.86% and higher K/S value is achieved under the condition of dye 2%（omf）, pH value 5, dyeing at 100℃ for 40 rain. The absorption rate of Acid Dark Blue 5R on modified acrylic fiber is very fast. And the absorption model is fitted for the Langmuir＋ Nernst thermodynamic adsorption model.