Pervaporation Membrane Exhibiting High Biocompatibility Based on PDMS/PEO Alternately Grafted Aromatic Polyamide

Abstract

Graft copolyamides containing amphiphilic components in the side chains, alternately grafted aromatic polyamides containing polydimethylsiloxane (PDMS) and poly(ethylene oxide) (PEO) segments (PA-g-SEa), were prepared by a macromonomer method, which exhibited the high permeability of PDMS segment and the biocompatibility derived from the amphiphilic components. PA-g-SEa membranes were prepared by solvent casting method, and the gas permeability, the pervaporation property, the surface property and the biocompatibility of the obtained polymer membranes were investigated. From the results of permeation examinations of gases and aqueous ethanol solutions, PA-g-SEa membranes indicated the high permeability for most gases and liquids. In addition, the organic permselectivity was enhanced with the increase of PDMS segment length of these polymers. Furthermore, the amount of adhered platelets on PA- g-SEa membranes was much smaller than that on only PDMS grafted aromatic polyamide (PA-g-PDMS) membranes, which would be due to the effect of amphiphilic side chains.