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                       Study on the Extraction of Natural Dyestuff from Coconut (Cocos nucifera L.) Coir Dust and Utilization on Cotton Fabric
                                                 Yi Yi Tin1, Thin Sandar Oo2, Nan Thazin Hein3
                              Department of Textile Engineering, West Yangon Technological University
                                                 Yangon, Republic of the Union of Myanmar
                                                               [email protected]
ABSTRACT
Natural dyes are important substances from natural resources like plants, minerals, and insects. This research is related to the extraction of natural dyestuff from a commonly found waste namely Coconut (Cocos nucifera L.) Coir Dust available nearly everywhere in Myanmar. The aims of this research are to reduce environmental pollutions related to the use of synthesis dyes and to create a valuable product from a waste or process by-product. The objectives are to extract the natural dyestuff from coconut coir dust, to study colours produced on dyed cotton fabrics and to analyse the characteristics and fastness properties of dyed cotton fabrics. The compounds present in coconut coir dust are ascertained by preliminary phytochemical tests. Natural dye powder is extracted by using soxhlet apparatus and distillation process. Cotton fabric is dyed with various concentrations of extracted natural dye (5% and 7% owf), respectively by using Jig Dyeing Machine and simultaneous mordanting method. Three different types of mordants such as alum, common salt and copper sulphate are used to measure the colour developed and test the colour fastness on dyed cotton fabrics and the amount used is 4% for all types of mordants.
Keywords - Natural dyestuff, coir, mordants, colour measurement, colour fastness