Characterising Porous Media - J.B.W.Webber - Kent, UK.
Thesis Abstract :
This thesis describes the characterisation of a range of
sol-gel silicas, mainly by the physical techniques of
NMR cryoporometry, density and imbibation measurements
and Small Angle Neutron Scattering.
The developments made to these techniques as part of this work
In particular, with the second point, there has been an attempt to use SANS
to provide an absolute calibration scale for pore size, nominally given
Construction of the first full cool/warm cycle
automated NMR cryoporometer, with continual pore
size distribution graphing.
Calibration of melting point constants with respect to
gas-adsorption and neutron scattering.
Detailed characterisation of the thermal properties
of the cryoporometer.
Development and measurement of the first multi-dimensionally resolved
pore size maps by NMR cryoporometry.
Demonstration that simple density and imbibation
measurements can, when combined with models, provide
a wealth of information concerning the silicas.
Development of novel continuous medium Monte-Carlo
integration methods to calculate the solid-solid
density correlation function for porous media,
showing excellent agreement with experimental SANS results.
E-mail me : J.B.W.Webber@ukc.ac.uk
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