Influence of Centrifugation on Coagulation of Colloidal Dispersions of Teflon™

Simmons, J.; Regel, L. L.; Wilcox, W. R.; Partch, R.

doi:10.1007/978-1-4615-0687-4_18

J. Simmons²^nAff4,
L. L. Regel²,
W. R. Wilcox² &
…
R. Partch³

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Abstract

The influence of gravity on coagulation of colloidal dispersions has scarcely been investigated. The objective of the present project was to determine how centrifugation influences coagulation of polytetrafluoroethylene (PTFE) colloidal dispersions and any differences in the coagulated product. PTFE was chosen because it is a unique polymer used in many consumer and industrial applications. Despite being hydrophobic, PTFE remains stable in aqueous dispersions probably due to charge on the particles.1 PTFE dispersions are usually coagulated by some form of mechanical agitation. This phenomenon has been attributed to the PTFE particles becoming irreversibly surrounded by air, because this material is poorly wet by the liquid.

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References

S. Kratohvil and E. Matijevic, Stability of colloidal Teflon dispersions in the presence of surfactants, electrolytes, and macromolecules, J. Colloid Interface Sci. 57:104 (1976).
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J.F. Simmons, Influence of Centrifugation on the Coagulation of Polytetrafluoroethylene Colloidal Dispersions, M.S. Thesis, Clarkson University (1996).
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R. Derebail, W.A. Arnold, G.J. Rosen, W.R. Wilcox, and L.L. Regel, HIRB - The centrifuge facility at Clarkson, in: Materials Processing at High Gravity, L.L. Regel and W.R. Wilcox, eds., Plenum Press, New York (1994) pp 203-212.
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J. Simmons
Present address: Chemistry Department, Clarkson University, Potsdam, NY, 13699-5814, USA

Authors and Affiliations

Boehringer Ingelheim Pharmaceuticals, Inc., Ridgefield, CT, 06877, USA
J. Simmons, L. L. Regel & W. R. Wilcox
International Center for Gravity Materials Science and Applications, Ridgefield, CT, 06877, USA
R. Partch

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J. Simmons
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L. L. Regel
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W. R. Wilcox
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R. Partch
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Editors and Affiliations

Clarkson University, Potsdam, New York, USA
Liya L. Regel & William R. Wilcox &

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Simmons, J., Regel, L.L., Wilcox, W.R., Partch, R. (2001). Influence of Centrifugation on Coagulation of Colloidal Dispersions of Teflon™. In: Regel, L.L., Wilcox, W.R. (eds) Processing by Centrifugation. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-0687-4_18

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DOI: https://doi.org/10.1007/978-1-4615-0687-4_18
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4613-5195-5
Online ISBN: 978-1-4615-0687-4
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