Mixed matrix membranes of 6FDA-6FpDA with surface functionalized γ-alumina particles. An analysis of the improvement of permselectivity for several gas pairs

摘要: Abstract Herein, mixed matrix membranes including alumina particles whose surfaces have been differently modified made and characterized. The polymeric is a fluorinated polyimide, 6FDA-6FpDA, whereas the inorganic constituent parts are neat, silanized or poly-vinyl-pirrolidone-coated nanometric γ-Al 2 O 3 of 40 nm in diameter, which added an approximated percentage 12% w/w. All unmodified lead to similar improvements permselectivity gas pairs studied. Only case /N pair increase selectivity for not as effective observed permeability enhancement uncoated PVP-coated particles. In CO /CH 4 , 1991 Robeson's upper bond line overpassed. characteristics improvement different analyzed terms properties particle–polymer interfacial properties.