Hostname: page-component-cd9895bd7-8ctnn Total loading time: 0 Render date: 2024-12-28T16:07:16.705Z Has data issue: false hasContentIssue false
  • English
  • Français

In situ capacitance studies of thin polymer films during compressed fluid extraction

Published online by Cambridge University Press:  31 January 2011

David H. Ziger
David H. Ziger
Affiliation:
AT&T Engineering Research Center, Princeton, New Jersey 08540
Get access

Abstract

Supercritical and compressed liquid CO2 extraction of thin solid organic films was studied using in situ capacitance monitoring. Parallel plate and fringe field capacitors were fabricated using organic films as principal dielectric media. Supercritical and compressed liquid CO2 extraction of these films at 100 bar and 30–45°C caused compositional and physical changes in the host polymer matrix that were correlated to capacitance history. As a result of these studies, film damage during extraction was attributed to explosive decompression of the CO2 solvent. In addition, a mechanism for supercritical fluid extraction of nonvolatile solutes from thin films, which is consistent with these capacitance measurements, is discussed.

Type
Articles
Information
Journal of Materials Research , Volume 2 , Issue 6 , December 1987 , pp. 884 - 894
Copyright
Copyright © Materials Research Society 1987

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1Chemical Engineering at Supercritical Conditions, edited by Paulaitis, M. E.Penninger, J. M.Gray, R. D. and Davidson, P. (Ann Arbor Science, Ann Arbor, MI, 1983).Google Scholar
2McHugh, M. A. and Krukonis, V. J. in Supercritical Fluid Extraction: Principles and Practice (Butterworth, Boston, MA, 1986), pp. 143–236.Google Scholar
3Ziger, D. H.Wolf, T. M. and Taylor, G. N. AIChE J. (to be published).Google Scholar
4Wissinger, R. G. and Paulaitis, M. E. Sorption, Swelling and Extraction in Glassy Polymer/CO2 Systems at Elevated Pressures presented at the Fall AIChE Meeting, Miami, 1986.Google Scholar
5Wang, W. V.Kramer, E. J. and Sachse, W. H.J. Polym. Sci. Polym. Phys. Ed. 20, 1371 (1982).Google Scholar
6Wang, W. V. and Kramer, E. J.Polymer 23, 1667 (1982).Google Scholar
7Iannuzzi, M. M.IEEE Trans. CHMT 4, 429 (1981).Google Scholar
8Lee, H. L. MS thesis, Massachusetts Institute of Technology, 1982.Google Scholar
9Mouayad, L. MS thesis, Massachusetts Institute of Technology, 1985.Google Scholar
10Senturia, S. D. and Sheppard, N. F. Jr. , Adv. Polym. Sci. 80, 1 (1986).Google Scholar
11Taylor, G. N.Wolf, T. M. and Moran, J. M.J. Vac. Sci. Technol. 19, 872 (1981).Google Scholar
12Anderson, J. C.Dielectrics (Chapman and Hall, London, 1966), p. 16.Google Scholar
13Taylor, G. N.Hellman, M. Y.Feather, M. D. and Willenbrock, W. E., Polym. Eng. Sci. 23, 1029 (1983).Google Scholar