Extraction of Natural Fabric Dyes from Brown Seaweeds and their Immense Properties

Abstract Natural dyes had been identified for recent years but they cannot be replaced the synthetic dyes because of the requirement of knowledge about the usage of natural resources around us to produce massively. This study concentrated about the extraction and their dyeing properties of natural fabric dyes from different brown seaweeds (Padina tetrastromatica, Sargassum tenerrimum and Turbinaria ornata). Various experiments such as phytochemical analysis and FTIR analysis were performed to decide the phytochemicals that helps to dye the fabrics. There were various types of solvents (acetone, ethanol, methanol and water) used for extract the dye and mordants (CH3 COOH, FeSO4 and NaHCO3) which helps to obtain different shades and excellent fastness properties. After dyes extracted by soxhlet extraction method, uncoated cotton fibres which underwent pre- mordanting process (2% mordant solution) were dyed. The dyed cotton fabrics showed shades of different colors based on the mordants and solvent used for dye extraction. Colour fastness assessments were provided the significant features of dyed fibres will have excellent dyeing properties or not. The results were indicated the aqueous and ethanol dye extracts have excellent fastness properties than acetone and methanol dye extracts. Faster properties did not control by the mordants used on cotton fibers.