(1) Pore size --> Mollecular weight cut-of by dextran or polyethylene glycol rejection
(2) Poresize distribution --> Bubble point method
(3) Microscopic structure --> Scanning electron microscopy (SEM)
(4) Chemical constituent --> Fourier transform infrared (FT-IR) spectroscopy
(5) Porosity
(6) Hidrophilicity/hydrophobicity --> Contac angle meter
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