棉纱线在活性染料皮克林乳液体系中的染色动力学

为探究SiO₂乳液(皮克林乳液)体系中活性染料在棉纱线上的染色机制,选用活性红M-3BF对棉染色动力学进行研究。首先对该染料在皮克林乳液和传统水浴体系中的染色性能进行对比,然后分别利用准一级和准二级动力学模型对该染料在皮克林乳液体系中上染棉纱线的数据进行拟合,计算各项动力学参数,并与传统水浴体系做对比。结果表明:在相同染料用量条件下,活性红M-3BF在皮克林乳液体系中的染料利用率高于传统水浴体系,耐皂洗色牢度相当;且2种体系中活性红M-3BF在棉纤维的上染都符合准二级动力学吸附模型方程,染料在皮克林乳液体系中的平衡吸附量高于传统水浴体系,吸附活化能小,半染时间缩短;硫酸钠能够提高平衡吸附量,加快上染速率。

Dyeing kinetics of reactive dye on cotton yarn in Pickering emulsion system

In order to explore the dyeing mechanism of reactive dye on cotton yarn in SiO₂ emulsion (Pickering emulsion)system, Reactive Red M-3BF was used to explore the kinetics for cotton dyeing. The dyeing performance of the dye in Pickering emulsion system and the traditional aqueous system were compared, before the data of cotton yarn dyed in Pickering emulsion system was fitted, and the kinetic parameters were calculated and compared with the traditional aqueous system. The results show that the dye utilization of Reactive Red M-3BF in the Pickering emulsion system are higher than that in the traditional aqueous bath dyeing system and the washing fastness is equivalent under the same dye dosages, and the dyeing of reactive Red M-3BF on cotton fibers in both systems conforms to the quasi-second-order kinetic adsorption model equation. The equilibrium adsorption capacity of dye in Pickering emulsion system is higher than that of traditional aqueous system, and the adsorption activation energy is smaller, the half-dyeing time is shortened. Sodium sulfate can increase the equilibrium adsorption capacity and speed up the dyeing rate.