Preparation of PS binary porous structure membrane and application.

PS binary porous structure membrane with big pores on the surface and small pores in the bottom was prepared combine BF method and colloidal crystal template method. Therefore, the big pore size can be controlled by BF conditions, while the small size adjusted by Si02 particles size. Compared with membrane prepared only using BF method, the binary porous structure membranes with high permeability possess potential applications in microfiltration. [ABSTRACT FROM AUTHOR]