超高分子质量聚乙烯纤维分散染料染色性能

为解决染料难以对超高分子质量聚乙烯(UHMWPE)纤维上染的问题,筛选具有超高疏水、良好结构平面性的甲基黄分散染料对UHMWPE纤维进行染色,并探讨其染色性能。讨论了染色温度、时间、分散剂(AEO-9)用量及p H值等因素的影响,测定了甲基黄染料对UHMWPE纤维的染色动力学与热力学行为。结果表明,甲基黄染料对UHMWPE纤维具有良好的染色性能,其优化工艺为:染色温度130℃,分散剂用量0.3%,时间60 min,p H值5,此时染色所得纤维各项色牢度均达到3~4级以上;通过拟合计算甲基黄染料对UHMWPE纤维吸附等温线类型为Nernst型吸附,半染时间为24.34 min,130℃时的扩散系数为5.21×10-17m2/s,标准亲和力约为5.56 k J/mol。

Dyeing properties of ultrahigh molecular weight polyethylene fibers with disperse dye

In order to solve dyeing problem of ultrahigh molecular weight polyethylene ( UHMWPE ) fibers, the dyeing properties of methyl yellow disperse dye with high planarity and super hydrophobic structure were studied. The effects of dyeing parameters such as temperature, time, pH value and the dosage of AEO-9 on the properties of the dyed UHMWPE fiber were investigated. Furthermore, The dyeing kinetics and thermodynamics of methyl yellow dye on UHMWPE fiber were studied. The results show that methyl yellow dye has good dyeing performance on UHMWPE fiber. The optimization process is achieved at the dispersant concentration of 0. 3%, 130 ℃ for 60 min, pH=5,and the rating of color fastness of dyed fibers are higher than 3-4. By simulating and calculating the experimental data, it is indicated that the adsorption process of methyl yellow dye onto UHMWPE fiber fits with the Nernst distribution mechanism, the half-staining time is 24. 34 min, the diffusion coefficiency at 130 ℃ is 5. 21 × 10 -17 m2/s, and the standard affinity is about 5. 56 kJ/mol.