栀子色素对羊毛纤维的染色工艺

Dyeing process of wool fiber with gardenia dye

天然植物染料因其天然环保、抗菌、易降解等特点而受到越来越多的关注,选用栀子提取物(栀子色素)对羊毛纤维进行染色。首先采用单因素试验及正交试验研究栀子色素的提取工艺,得出栀子色素最佳提取工艺为栀子与去离子水料液比1∶30,提取液pH值8,提取温度70℃,提取时间50min;然后采用直接染色法和预媒染染色法分别上染羊毛纤维,正交试验结果表明:栀子色素对羊毛纤维直接染色最佳工艺为染色浴比1∶30,染色温度60℃,染液pH值为6,上染时间50min。预媒染染色最佳工艺为:预媒染色浴比1∶30,预媒染色温度70℃,预媒染色时间50min,预媒染液pH值6,氯化镧质量浓度8g/L。羊毛纤维经2种优化工艺染色后,色牢度均达到3级及以上。经预媒染色优化工艺染色后,羊毛纤维的K/S值为7.347。

Natural plant dyes have received more and more attention due to their natural,environmentally friendly,antibacterial,and easy-degradation characteristics.Gardenia extract was selected to dye wool fiber in the article.Single factor test and orthogonal test were used to study the extraction technology of gardenia dye,the optimal extraction process of gardenia dye was:gardenia and deionized water ratio 1∶30,deionized water pH value 8,extraction temperature 70℃,extraction time 50 min.Then the wool fiber was dyed by direct dyeing method and mordant dyeing method respectively.The orthogonal test results show that the optimal dyeing process for wool fiber is dyeing bath ratio 1∶30,dyeing temperature 60℃,dyeing solution pH value 6,dyeing time 50 min.The optimum process of mordant dyeing method is dyeing bath ratio 1∶30,dyeing temperature 70℃,dyeing time 50 min,dyeing solution pH value 6,lanthanum chloride mass concentration 8 g/L.After optimized dyeing process,the color fastness of wool fibers reached grade 3 and above,and K/S value was 7.347.