Korean Journal of Chemical Engineering, Vol.16, No.1, 111-117, January, 1999
DYE SOLUBILITY IN SUPERCRITICAL CARBON DIOXIDE. EFFECT OF HYDROGEN BONDING WITH COSOLVENTS
The use of supercritical carbon dioxide is emerging as a potential method for achieving pollution-free dyeing. An important factor in supercritical fluid dyeing is the solubility of the dye in supercritical carbon dioxide. Our measurements show that the solubility of C.I. Disperse Red-60 dye in supercritical carbon dioxide is significantly enhanced upon addition of polar cosolvents : ethanol and acetone. The solubility enhancement is attributed to the formation of hydrogen bonds between cosolvent and dye molecules. Observed solubility behavior is correlated using dilute-solution theory with lattice-fluid-hydrogen-bonding model. Needed physical and hydrogen-bonding molecular parameters are estimated using the experimental data.
Keywords:Dye Solubility;Supercritical Carbon Dioxide;Hydrogen Bonding;Cosolvent;Solubility Enhancement
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