This study presents a novel method for eco-friendly dyeing of cotton fabrics with direct dyes. Cotton fabric modified with chitosan-poly propylene imines dendrimer CS-PPI, and its dyeing and fastness properties were investigated using three direct dyes. The impacts of important factors, i.e., CS-PPI concentration, dye concentration, dyeing time, dyeing temperature, and salt concentration were i...

non-ideality, it will tend to reduce differences between calibraiion and predictior;. To do this of course is not always possible, particularly where the effect of changing dyebath conditions is under consideration, e.g. liquor ratio, electrolyte concentration, pH and dye concentration. To attempt calibration experiments to adequately cover the results of such changes would remove the need for ...

The transformation of petrol based polymers towards more sustainable and biodegradable materials includes the development bio-based pigments for mass coloration. Dye lakes prepared from aqueous plant sources could allow a substitution synthetic with material. shaping thermoplastic melt extrusion step at higher temperature e.g. 245 °C polyamide 6, thus suitable natural dye must exhibit sufficien...

This paper reports the studies available on the characterization and chemical/biochemical analysis of natural dyes; extraction of colorants from different natural sources; effects of different mordants and mordanting methods; conventional and non-conventional methods of natural dyeing; physico-chemical studies on dyeing process variables and dyeing kinetics; development of newer shades and anal...

The textile dyeing units of Pallipalayam area of Namakkal District play a vital role in polluting the river Cauvery directly and spoiling the underground water levels indirectly by letting off their dyeing effluents. This leads to serious environmental hazards of aquatic organisms. In the present study, the textile dyeing effluents of six major textile dyeing units (ST1, ST2, ST3, ST4, ST5 and ...