Using nano-cast model porous media and integrated gas sorption to improve fundamental understanding and data interpretation in mercury porosimetry
Rigby, S. P., Evbuomwan, I. O., Watt-Smith, M. J., Edler, K. and Fletcher, R. S., 2006. Using nano-cast model porous media and integrated gas sorption to improve fundamental understanding and data interpretation in mercury porosimetry. Particle & Particle Systems Characterization, 23 (1), pp. 82-93.
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The mechanisms of entrapment, and the nanoscopic spatial distribution, of the residual mercury within nano-cast and amorphous porous media (pore sizes .apprx. 1-100 nm) following high-pressure penetration were studied. It has been shown that, even at the nano-scale, one of the same two principle mechanisms that were obsd. previously in mercury porosimetry expts. on macroscopic glass pore models also occur within a given amorphous, nanoporous solid. Using percolation theory to interpret novel, integrated gas sorption expts., entrapment was shown to arise, either because of the presence of sufficiently narrow pore necks interspersed between larger voids, or due to non-random, longer-range structural heterogeneity. The threshold "snap-off" ratio parameter for the entrapment process has also been directly measured but found to be considerably smaller than seen previously for macroporous materials. The techniques employed here enable information not previously available for nanoporous systems to be detd., and therefore to be incorporated into simulations of mercury porosimetry on those materials. [on SciFinder (R)]
|Creators||Rigby, S. P., Evbuomwan, I. O., Watt-Smith, M. J., Edler, K. and Fletcher, R. S.|
|Uncontrolled Keywords||pore, percolation, sorption (improvement of fundamental understanding and data interpretation in mercury porosimetry by using nano-cast model porous media and integrated gas sorption), porous medium integrated gas sorption mercury porosimetry data interpretation, porous materials, heterogeneity|
|Departments||Faculty of Engineering & Design > Chemical Engineering|
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