Membrane structure and method of making

Details Membrane structure and method of making Membrane structure and method of making

2011-04-05

2011-04-05

Fortuna, Ana M (Department: 1777)

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

C205S324000, C205S640000, C205S665000, C210S490000, C210S500240, C210S502100

Reexamination Certificate

active

07919025

ABSTRACT:
A membrane structure is provided. The membrane structure includes a first layer having a plurality of pores; and a second layer disposed on the first layer. The second layer has a plurality of unconnected pores. At least a portion of the plurality of unconnected pores of the second layer is at least partially filled with a filler such that the first layer is substantially free of the filler. At least a portion of the plurality of unconnected pores of the second layer is in fluid communication with at least one of the pores of the first layer. A method of making a membrane structure is provided. The method includes the steps of providing a first layer having a plurality of interconnected pores; disposing a second layer on the first layer, and filling at least a portion of the unconnected pores of the second layer with a filler such that the first layer is substantially free of the filler. Disposing a second layer includes depositing a metal layer on the first layer; and anodizing the metal layer to convert the metal layer into porous oxide layer.

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Yoo et al., “Synthesis and Characterization of Uniform Alumina-Mesoporous Silica Hybrid Membranes”, Langmuir, vol. 22, pp. 1839-1845, 2006.

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