非离子表面活性剂作用下分散染料对棉沾色机理研究

Staining Mechanism of Disperse Dyes on Cotton Fabric in the Presence of Nonionic Surfactants

通过研究非离子表面活性剂结构和浓度对C.I.分散红60增溶量、分散体系的高温稳定性、C.I.分散红60的上染率以及染浴中染料残留量的影响,探讨了在非离子表面活性剂作用下C.I.分散红60对棉沾色的机理。结果表明:非离子表面活性剂用量较低(0.5 g/L左右)时,分散体系有较好的高温稳定性,此时非离子表面活性剂对分散染料的增溶量为影响沾色的主要因素,分散染料的增溶有利于减少其对棉的沾色;随着非离子表面活性剂用量的增加(≥1 g/L),染料的上染百分率和分散体系的高温稳定性降低,分散染料对棉的沾色加重,沾色等级降低到2级。

Based on the effects of structure and concentration of nonionic surfactants on solubilizing capacity, high temperature stability of the dispersion system, dye-uptake, and dye residues of C. I. Disperse Red 60, the staining mechanism of disperse dyes on cotton in the presence of nonionie surfactants was studied. The results showed that the solubilizing capacity of C. I. Disperse Red 60 was the main factor to staining when the concentration of nonionic surfactants was about 0. 5 g/L and the high temperature stability of the dispersion system was good, the staining on cotton was reduced with the rising of solubilization; with the rising of concentration of nonionic surfactants （ ≥ 1g/L） , the dye-uptake and dispersion stability were declined, and the staining on cotton was serious.