Selection of disperse dye is one of the most important factors in supercritical fluid carbon dioxide dyeing. Measuring the affinity of disperse dyes and PET fibers also important things in the SC-CO2 dyeing. As the first method to confirm the affinity, IOB, which shows the characteristics of dyes in...
Selection of disperse dye is one of the most important factors in supercritical fluid carbon dioxide dyeing. Measuring the affinity of disperse dyes and PET fibers also important things in the SC-CO2 dyeing. As the first method to confirm the affinity, IOB, which shows the characteristics of dyes in the ratio of organic (OV) and inorganic (IV) (Inorganic Organic Balance) value, respectively, was calculated. Using Gibbs' free energy theory and the chemical potential value representing the energy required for the dye to move from the standard state of the supercritical phase to the standard state of the fiber were measured to confirm affinity. and surface free energy was considered to support the right dye selection. Surface free energy is very closely to the degree of hydrophobicity and intermolecular interaction on the surface of PET and disperse dyes. After confirming the affinity by the three methods presented above, for verification, the exhaustion rate calculated by extracting the dye from the samples after the actual supercritical dyeing and K/S measurement were reviewed. In addition to these, SEM imaging, which can indirectly predict the dissolution rate of dispersed dyes, was also performed. As a result, Disperse red 167, Disperse violet 93, Disperse orange 155, Disperse blue 60, Disperse yellow 42, and Disperse yellow 86 dyes were judged to have excellent compatibility with PET in that order. As a result of verifying affinity in two ways used in this study, experimental results of the same tendency were obtained.
Selection of disperse dye is one of the most important factors in supercritical fluid carbon dioxide dyeing. Measuring the affinity of disperse dyes and PET fibers also important things in the SC-CO2 dyeing. As the first method to confirm the affinity, IOB, which shows the characteristics of dyes in the ratio of organic (OV) and inorganic (IV) (Inorganic Organic Balance) value, respectively, was calculated. Using Gibbs' free energy theory and the chemical potential value representing the energy required for the dye to move from the standard state of the supercritical phase to the standard state of the fiber were measured to confirm affinity. and surface free energy was considered to support the right dye selection. Surface free energy is very closely to the degree of hydrophobicity and intermolecular interaction on the surface of PET and disperse dyes. After confirming the affinity by the three methods presented above, for verification, the exhaustion rate calculated by extracting the dye from the samples after the actual supercritical dyeing and K/S measurement were reviewed. In addition to these, SEM imaging, which can indirectly predict the dissolution rate of dispersed dyes, was also performed. As a result, Disperse red 167, Disperse violet 93, Disperse orange 155, Disperse blue 60, Disperse yellow 42, and Disperse yellow 86 dyes were judged to have excellent compatibility with PET in that order. As a result of verifying affinity in two ways used in this study, experimental results of the same tendency were obtained.
Keyword
#supercritical fluid CO2, disperse dye, polyester, affinity, IOB, chemical potential, surface free energy, K/S, exhaustion, SEM
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