Flexible polymeric flters with low tortuosity produced in a roll to roll process

L.C. Sorvik*, M.-A. Raux, G. Osborg, H. Hemmen, Condalign AS, Norway

CondAlign has demonstrated a new method to produce membranes: The membranes are flexible polymer films with controlled dispersion of pores of near uniform size. The technology can also incorporate a layer of active particles exposed on the surface of the pores. Potential applications include microfiltration, catalysis and bioprocesses.

The membranes are produced by synthesizing an emulsion of a non-miscible liquid in a curable viscous polymer. The emulsion is spread out on a substrate and consequently introduced to an external electric field. The field coalesces the emulsion to droplets and aligns the liquid droplets, creating liquid pockets that stretches from top to bottom in the matrix. The polymer matrix is then cured and subsequent evaporation, washing or drying of the material creates the finished membrane.

The achievable diameter of the pores is proportional to the film thickness, the minimum diameter we have demonstrated so far is about 10 microns, but presumably this can be reduced further. The pores of the membrane can also be functionalized by adding specific molecules or particles to the emulsion. These will be positioned by the electric field at the interfaces of the two liquids in the emulsion and become exposed on the surface of the pores of the finished membrane.

The membranes produced by CondAlign’s technology have a near uniform pore size and distribution in the material. Furthermore...

Session: M1 - Membrane Design and Characterization
Day: 22 October 2019
Time: 13:00 - 14:15 h

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