Control ofoptical transport parameters of ‘porous medium– supercritical fluid’ systemsстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 11 января 2016 г.
Аннотация:The possibility of controlling optical transport parameters
(in particular, transport scattering coefficient) of porous systems
based on polymer fibres, saturated with carbon dioxide in different
phase states (gaseous, liquid and supercritical) has been experimentally
studied. An increase in the pressure of the saturating medium
leads to a rise of its refractive index and, correspondingly, the diffuse-transmission
coefficient of the system due to the decrease in the
transport scattering coefficient. It is shown that, in the case of subcritical
saturating carbon dioxide, the small-angle diffuse transmission
of probed porous layers at pressures close to the saturated
vapour pressure is determined by the effect of capillary condensation
in pores. The immersion effect in ‘porous medium–supercritical fluid’
systems, where the fluid pressure is used as a control parameter, is
considered. The results of reconstructing the values of transport scattering
coefficient of probed layers for different refractive indices of a
saturating fluid are presented.