樟树落叶天然染料的提取及用于真丝绸染色

Extraction of natural dye from dry leaves of camphortree and its dyeing on silk fabric

从樟树落叶中提取天然染料并将提取液用于真丝绸的染色,讨论了氢氧化钠浓度、提取温度、提取时间、料液比对樟树落叶天然染料提取效果的影响,以及染色pH值、染色温度、染色时间、硫酸钠质量浓度等对真丝绸染色效果的影响。研究表明,樟树落叶提取的优化工艺为:氢氧化钠0.2 mol/L,提取温度100℃,提取时间50 min,料液比1∶40;樟树落叶提取液对真丝绸直接染色的优化工艺为:染色pH3.50左右,染色温度90℃,浴比50∶1,染色时间60 min。此外,碱性提取物染色真丝绸具有一定的牢度性能,媒染可提高染色真丝绸的染色牢度和耐晒色牢度。

The extraction of natural dye from dry leaves of camphortree and the dyeing on silk fabrics with extracts were studied. Factors exerting influence on extraction results such as NaOH concentration, extraction temperature, extraction time, material ratio and factors exerting influence on dyeing results on silk fabrics including dyeing pH, dyeing temperature, dyeing time, Na2SO4 concentration were discussed. It was found that the optimum extraction conditions were NaOH 0.20 mol/L, extraction at 100 ℃ for 50min, material ratio 1 ： 40. The optimum conditions for the dyeing on silk fabrics were pH value 3.50, dyeing at 90℃ for 60 min, bath ratio 50 ： 1. Furthermore, the dyed silk fabrics with alkaline extracts had indefinite fastness properties and that the washing fastnesses and colour fastness could be improved by mordanting. Key Words： Dry leaves of camphortree; Natural dyes; Extraction; Silk fabric; Dyeing