芡实壳天然染料真丝染色动力学研究

Dyeing Kinetics of Natural Dye from Euryale Shell on Silk

为了探讨芡实壳天然染料在桑蚕丝上的染色机理,通过测定不同温度下芡实壳天然染料在桑蚕丝上的上染速率研究芡实壳天然染料在桑蚕丝纤维上的扩散系数和染色速率常数;根据线性拟合得出芡实壳天然染料在桑蚕丝纤维上的假一级动力学模型以及假二级动力学模型,比较得出芡实壳天然染料在真丝上的上染机理更加符合假二级动力学。

To investigate the dyeing mechanism of the natural dye--euryale shell onto silk fiber, the diffusion coefficients D and dyeing velocity coefficient at different times and temperatures were determined. The results showed that diffusion coefficient and dyeing velocity coefficient increased with the increase of dyeing temperature, but decreased along with the prolongation of dyeing time. The adsorption data of euryale shell onto the silk fabric fitted well the pseudo second--order kinetic model.