We report a preliminary investigation of nonaqueous sizing and desizing where liquid carbon dioxide is the solvent. New size formulations are required for this process because traditional size materials are not directly soluble in liquid carbon dioxide. Candidate size compounds are first tested for solubility, and those found to be soluble are then applied to polyester/cotton yarns using two methods: immersing the yarn in a size-saturated carbon dioxide solution and drawing the yarn through a hot melt of the compound. The tensile strength and elastic modulus of the sized yarns are deter mined. Complete removal of the size compounds from the treated yarns by means of liquid carbon dioxide extraction is demonstrated.
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References
1.
Bartle, K.D. , Clifford, A.A., Jafar , S.A., and Shilstone , G.F., Solubilities of Solids and Liquids of Low Volatility in Supercritical Carbon Dioxide, J. Phys. Chem. Ref. Data20, 713-729 (1991).
2.
Beck, K.R., Drews, M.J., Sikorski, M.E., and Teja, A., Evaluation of the Utilization of Supercritical Fluid Technology for Analytical, Process, and Environmental Applications in Textiles, National Textile Center Annual Report, pp. 109-118, September 1994.
3.
Blitz, J.P., Fulton, J.L., and Smith, R.D., Near- andMid-Infrared Transmission Cells for the Study of Reverse Micelle Phases in Supercritical Fluids, Appl. Spectrosc.43, 812-816(1989).
4.
Czubryt, J.J. , Giddings, J.C., and Myers, M.N., Solubility Phenomena in Dense Carbon Dioxide Gas in the Range 270-1900 Atmospheres, J. Phys. Chem.74, 4260-4266 (1970).
5.
DeSimone, J.M. , Guan, Z., and Elabernd, C.S., Synthesis of Fluoropolymers in Supercritical Carbon Dioxide, Science257, 945-947 (1992).
Enick, R.M., Reid, M., and Stofesky, D., The Effect of Hydroxyaluminum Disoaps and Perflouroalkylpolyethers on the Viscosity of Liquid Propane and Carbon Dioxide, in " Proc. 2nd International Symposium on Supercritical Fluids, M. A. McHugh, Ed., Johns Hopkins University , Baltimore, MD, 1991, p. 341.
8.
Francis, A.W. , Ternary Systems of Liquid Carbon Dioxide, J. Phys. Chem.58, 1099-1114 (1954 ).
9.
Fulton, J.L., and Bowman, L.E., DyeingPolyester Using Supercritical Carbon Dioxide, presented at the American Fiber Manufacturer's Meeting (AFMA) on Supercritical Processing, Los Alamos National Laboratory, July 11-12, 1994.
10.
Fulton, J.L. , Pfund, D.M., McClain, J.B., Romack, T.J., Maury, E.E., Combes, J.R., Samulski, E.T., and DeSimone , J.M., Aggregation of Amphiphilic Molecules in Supercritical Carbon Dioxide: A Small Angle X-Ray Scattering Study, Langmuir11, 4241-4249 (1995 ). 11. Fulton, J.L., Smith, R.D., and Yee, G.G., Fourier Transform Infrared Spectroscopy of Molecular Interactions of Heptafluoro-1-butanol or 1-Butanol in Supercritical Carbon Dioxide and Supercritical Ethane, J. Phys. Chem.96, 6172-6181 (1992 ).
11.
Fulton, J.L. , Smith, R.D., and Yee, G.G., Hydrogen Bonding of Methyl Alcohol-d in Supercritical Carbon Dioxide and Supercritical Ethane Solutions, J. Am. Chem. Soc.113, 8327-8334 (1991 ).
12.
Hansen, L., Weird Fluids, Big Business—Supercriticals May Be Reaching Critical Mass, Business Week, September 11, 100-101 ( 1995).
13.
Jonas, J., Song, X., and Zerda, T.W., Raman Study of Intermolecular Interactions in Supercritical Solutions of Naphthalene in CO2, Appl. Spectrosc.8, 1194-1199 (1986).
14.
Knittel, D. , Saus, W., and Schollmeyer , E., Application of Supercritical Carbon Dioxide in Finishing Processes, J. Textile Inst.4, 534-552 (1993).
15.
Knittle, D. , Saus, W., and Schollmeyer , E., Supercritical Carbon Dioxide in Water-Free Dyeing of Textiles, Umwelt22, 671-672 (1992).
16.
Knittle, D. , Saus, W., Schollmeyer , E., Dyeing of Textiles in Supercritical Carbon Dioxide, Textile Res. J.63, 135-142(1993).
17.
Knittle, D. , and Schollmeyer , E., Dyestuffs in Supercritical Carbon Dioxide and Supramolecular Chemistry, GIT Fachz. Lab.36, 993-994 (1992).
18.
Laintz, K.E. , Smith, R.D., Yonker , C.R., and Wai, C.M., Solubility of Fluorinated Metal Diethyldithiocarbamates in Supercritical Carbon Dioxide , J. Supercrit. Fluids4, 194-198 (1991).
19.
Rabolt, J.F. , Russell, T.P., and Twieg, R.J., Structural Studies of Semifluorinated n-alkanes, 1: Synthesis and Characterization of F(CF2)n(CH2)mH in the Solid State, Macromolecules17, 2786-2794 (1984).
20.
Roark, R.J., and Young, W.C., "Formulas for Stress and Strain," 5th ed., McGraw-Hill, NY, 1982, p. 98.
