Abstract: The pore size distribution (PSD) measured by the gas bubble point (GBP) method of ceramic microfiltration (MF) membranes
prepared by suspension technique was found to be significantly influenced by the membrane thickness. A culm-like model for
pore structure was introduced to characterize the membrane pores instead of the conventional model which does not reflect the
radius variation along the pore passages and is unable to explain the thickness effect on the membrane PSD. A laminate
structure, taking the culm-like model for pore structure into consideration, was hypothesized for ceramic MF membranes. A
mathematical model was then established to quantitatively describe the relationship between the membrane number PSD and the
membrane thickness. Good results were obtained for the correlation of mean pore size and simulation of the PSD for ceramic MF
membranes.

Key words: modeling, pore structure, pore size distribution, thickness, ceramic membrane

摘要： The pore size distribution (PSD) measured by the gas bubble point (GBP) method of ceramic microfiltration (MF) membranes
prepared by suspension technique was found to be significantly influenced by the membrane thickness. A culm-like model for
pore structure was introduced to characterize the membrane pores instead of the conventional model which does not reflect the
radius variation along the pore passages and is unable to explain the thickness effect on the membrane PSD. A laminate
structure, taking the culm-like model for pore structure into consideration, was hypothesized for ceramic MF membranes. A
mathematical model was then established to quantitatively describe the relationship between the membrane number PSD and the
membrane thickness. Good results were obtained for the correlation of mean pore size and simulation of the PSD for ceramic MF
membranes.

关键词: modeling;pore structure;pore size distribution;thickness;ceramic membrane