Macroporous or microporous filtration membrane, method of prepar

Details Macroporous or microporous filtration membrane, method of prepar Macroporous or microporous filtration membrane, method of prepar

1997-04-14

1999-11-30

Fortuna, Ana

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210636, 21050029, 21050042, 21050023, 210490, 210231, 264 41, 264200, B01D 6100, B01D 3900

Patent

active

059936614

ABSTRACT:
This invention relates to a microporous or macroporous affinity filtration membrane wherein the matrix is composed of chitosan or chitin and the pores are made by dissolution of porogen during the preparation of the membrane. The invention also relates to a method of preparation of the membrane comprising preparing an acidic chitosan solution containing porogen, shaping the suspension into a membrane, and dissolving the porogen by immersing the membrane in an alkaline solution. To prepare chitin membranes, the chitosan membranes are acetylated. The special feature of the membrane is that the pore size can be controlled by varying the size of the porogen. The membranes are suitable for affinity purification of macromolecules.

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