Supercritical fluid dyeing system
Tutor/a - Director/a
Estudiante
Muñoz Vallecillo, Anna Yan
Tipo de documento
Trabajo final de grado
Fecha
2023
rights
Acceso abierto
Editorial
Universitat Politècnica de Catalunya
UPCommons
Resumen
Recent advances in fibres, fabrics and high-performance manufacturing technologies are the main driver for the emergence of functional textiles. For this reason, this thesis compares the advantages of using scCO2 dyeing technology with conventional dyeing of PET with high and low molecular weight chitosan. After evaluating the surface properties (hydrophilicity and wettability), colour values and antibacterial properties of PET and chitosan functionalised PET using the crosslinking agent BTCA. It is concluded that conventional and scCO2 dyeing are very similar in terms of the surface properties of PET after simultaneous dyeing and functionalisation with chitosan. The conventionally treated samples are more hydrophobic and more intensely dyed than those treated in a scCO2 medium. Finally, the antibacterial activity of the PET samples does not show a clear trend between the different dyeing methods, as the study conditions and bath formulation vary widely
