洋葱皮色素对竹浆纤维的染色工艺研究

Study on the dyeing process of bamboo pulp fibers with onion skin dye

探讨柠檬酸后媒染条件下,采用二浴二步法,应用洋葱皮色素对竹浆纤维进行直接染色和后媒染固色工艺,以染色p H值、染色时间、染色温度、染液质量浓度为主要变化因素,进行正交试验,得到优化的直接染色工艺参数为:染色时间90 min,染色温度75℃,染色p H值5,染液质量浓度5 g/(200 m L);获得优化的媒染固色工艺参数为:媒染时间60 min,媒染温度90℃,媒染液质量浓度15 g/L。在直接染色阶段,p H值影响最显著,其他因素依次为染色时间、染液质量浓度以及染色温度;在后媒染固色阶段,温度对媒染固色效果的影响最显著,其他依次为媒染液质量浓度与媒染时间。

The dyeing process of bamboo pulp fibers with onion skin dye was studied with citric acid through two-bath two-step post-mordant method,the main factors such as pH value,dyeing time,dyeing temperature and dye solution concentration on dyeing effects were studied through orthogonal experiments.The optimized direct dyeing parameters are:dyeing time 90 min,dyeing temperature 75℃,pH value 5 and mass concentration of dye 5g/200ml.The optimized mordant fixation process parameters are:mordant dyeing time 60min,mordant dyeing temperature 90℃ and mass concentration of solution 15g/L.At the stage of direct dyeing,the influence of significance level is pH value >dyeing time>dyeing temperature>mass concentration.Meanwhile,the significance level of post-mordant process parameters is mordant dyeing temperature>mass concentration of mordant solution>mordant dyeing time.