Aging and Modified Washing Process for Polyester Fabrics—Environmental Impact

Aging and washing factors have a direct influence on changing the properties of textile products, e.g., causing a release of textile fragments in the washing process. In this study, polyester fabrics were exposed to artificial aging under controlled conditions. Using a modified washing process, polyester fabrics were subjected to 10 washing cycles before and after the aging process. To monitor the influence of aging and the modified washing process on the polyester fabrics, the physical, structural and morphological properties of the fabrics and the composition of the collected wastewater were analyzed. The results indicate a slight degradation and increased defragmentation of the polyester fabric due to the processes used. Aging caused the phenomenon of "annealing", photo-oxidative degradation, and the local thickening of the individual fibers. Aging and washing processes influence the change in tensile strength properties. An analysis of zeta potential and BET results confirmed that the aging process results in surface modifications that depend on the time of exposure. The physico-chemical characterization and microscopic analysis of the wastewater revealed various fragments and short, detached fibrils. The results confirmed that both aging and washing significantly affect the properties of polyester fabrics and the composition of the wastewater resulting from the washing process. The relevance of this research to environmental matters is emphasized through the parameters chosen, which reveal the influence of aging on polyester fabric characteristics and the contamination detected in wash wastewater. In conclusion, several avenues for future research have been identified, including lowering washing temperatures, choosing more appropriate detergents, and adjusting standard washing protocols.