The effect of surface modification with ozone in waterless (ScCO2) dyeing o polyester

In this study, ozonation was carried out prior to dyeing 100% polyester fabrics through spray application (without the use of water) at various durations and with different gas flow rates. The ozonated fabrics were dyed with Dianix Dry XF2 Rubine (disperse dye) in conventional and supercritical carbon dioxide (scCO2) medium. The main objective of the study is to investigate the colour efficiency of the ozone modified polyester fabric in waterless dyeing. Hydrophilicity, colour measurement, tensile strength, fastness tests, SEM analyses were performed on the samples. The results of dyeing the samples in a waterless medium after ozonation revealed higher colour strength (K/S) and better fastness test results with breaking strength values than conventionally dyed fabrics.