Gas permeability properties of copper (II) biphenyl dicarboxylate-triethylenediamine in rubbery mixed-matrix membranes

The three dimensional, metal-organic framework (MOF), copper(II) biphenyldicarboxylate-triethylenediamine (Cu(II) BPDC-TED) was incorporated into various rubbery polymer membranes including polydimethylsiloxane (PDMS), poly(3-octylthiophene) (POT), and poly (3-(2-acetoxyethylthiophene) (PAET). At a 30% (w/w) loading of Cu(II) BPDC-TED, in both PDMS and POT, the MOF acted like a filler. The permeability of these mixed-matrix membranes were evaluated for pure N2, O2, CH4, CO2, and H2 as well as a CO2/CH 4 gas mixture. At the same 30% (w/w) loading, PAET, the polymer with the lowest relative permeability, experienced an increase in CH4 and H2 permeability. These results suggest that the MOF can be used to facilitate CH4 and H2 transport for polymers with inherently low permeability such as PAET and Matrimid RTM.