Porous composite membrane and method for making the same

Details Porous composite membrane and method for making the same Porous composite membrane and method for making the same

B - Operations, Transporting

01

D

B01D 35/00 (2006.01) B01D 67/00 (2006.01)

Patent

CA 2497530

The invention provides composite porous membranes comprising a porous hydrophobic substrate coated with difunctional surface-modifying molecules. The difunctional surface-modifying molecules provide a hydrophilic surface without forming branches of interconnected polymer molecules in the pores. The invention also provides a method for making composite porous membranes, such as a composite hydrophilic membrane with reduced concentration of surface modifying molecules required to coat a hydrophobic substrate.

L'invention concerne des membranes composites poreuses comprenant un substrat hydrophobe poreux revêtu de molécules de modification de surface bifonctionnelles. Lesdites molécules de modification de surface bifonctionnelles permettent d'obtenir une surface hydrophile sans formation de ramifications de molécules polymères reliées entre elles dans les pores. L'invention concerne également un procédé de fabrication de membranes composites poreuses, telle qu'une membrane hydrophile composite présentant une concentration réduite de molécules de modification de surface nécessaire pour revêtir un substrat hydrophobe.

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