Ethylene terephthalate oligomers in the processes of modification of polyester fabrics in supercritical carbon dioxide

The influence of the conditions of processing of polyester fiber material in the supercritical carbon dioxide (SC-CO2) medium on the localization of ethylene terephthalate cyclic oligomers on the surface of fibers is studied. It is shown that cyclic oligomers are deposited on the surface of polyester fiber materials in the form of large associates. The mechanism of migration of oligomers from the interior of polyester fibers plasticized in the SC-CO2 medium is considered. Recommendations to minimize the amount of surface oligomers in the dyeing of polyester fiber materials in SC-CO2 are given. It is shown that the deposition of oligomers on the surface of polyester fabric does not adversely affect the quality of their hydrophobization with ultrafine polytetrafluoroethylene in the SC-CO2 medium.

[1]  M. S. Sfiligoj,et al.  WAXS analysis of structural changes of poly(ethylene terephthalate) fibers induced by supercritical-fluid dyeing , 1998 .

[2]  G. Montero,et al.  Solubility relationships for disperse dyes in supercritical carbon dioxide , 2000 .

[3]  D. Matson,et al.  Rapid precipitation of low vapor pressure solids from supercritical fluid solutions: the formation of thin films and powders , 1986 .

[4]  L. Manna,et al.  Diffusion of disperse dyes in PET films during impregnation with a supercritical fluid , 2000 .

[5]  M. Gorenšek,et al.  The Influence of Treatment Conditions on the Quantity and Composition of Oligomers Extracted from Polyester Fabric , 2002 .

[6]  Eckhard Schollmeyer,et al.  Application of Supercritical Carbon Dioxide in Finishing Processes , 1993 .

[7]  E. Selli,et al.  Morphological changes and dye uptake of poly(ethylene terephthalate) and 2,5-cellulose diacetate immersed in supercritical carbon dioxide , 1998 .

[8]  Robert C. Reid,et al.  SUPERCRITICAL FLUID EXTRACTION. , 1983 .

[9]  P. Zipper,et al.  The influence of different treatment media on the structure of PET fibres , 2002 .

[10]  J. Shim,et al.  Dyeing of pet textile fibers and films in supercritical carbon dioxide , 1996 .

[11]  Enzo Cadoni,et al.  Dyeing polyester fibres with disperse dyes in supercritical CO2 , 2000 .

[12]  L. Tušek,et al.  The Effect of Pressure and Temperature on Supercritical CO2 Dyeing of PET-Dyeing with Mixtures of Dyes , 2000 .

[13]  Gerardo A. Montero,et al.  Supercritical Fluid Technology in Textile Processing: An Overview , 2000 .

[14]  H. Imafuku.  An alkaline dyeing system for polyester , 2008 .

[15]  Andrew I. Cooper,et al.  Polymer synthesis and processing using supercritical carbon dioxide , 2000 .

[16]  Mark A. McHugh,et al.  Solubility of Polymers and Copolymers in Supercritical CO2 , 1996 .

[17]  Eckhard Schollmeyer,et al.  Dyeing of Textiles in Supercritical Carbon Dioxide , 1993 .

[18]  S. Kazarian.  Polymers and supercritical fluids: opportunities for vibrational spectroscopy , 2002 .

[19]  R. Eggers,et al.  Mass transfer in polymers in a supercritical CO2-atmosphere , 1999 .

[20]  M. McHugh,et al.  Phase Behavior of Polymers in Supercritical Fluid Solvents. , 1999, Chemical reviews.

[21]  L. Boinovich,et al.  Hydrophobic materials and coatings: principles of design, properties and applications , 2008 .

[22]  G. Witkamp,et al.  Equilibrium Study on the Disperse Dyeing of Polyester Textile in Supercritical Carbon Dioxide , 2007 .

[23]  W. Hendrix.  Progress in Supercritical Co2Dyeing , 2001 .

[24]  D. Lewis,et al.  Solubility of Disperse Dyes in Supercritical Carbon Dioxide , 1997 .

[25]  L. Manna,et al.  Comparison of Dye Diffusion in Poly(ethylene terephthalate) Films in the Presence of a Supercritical or Aqueous Solvent , 2000 .