Immersion precipitation of solutions having 15%-30% (w/w) and various
molecular weights of the emeraldine base form of polyaniline in polar
aprotic solvents are shown to form integrally skinned asymmetric membranes
and fibers having skin layers <1 .mu.m thick which exhibit improved
rates of gas transport while preserving good selectivity. These membranes
can be further transformed by an acid doping process after fabrication to
achieve excellent permeation rates and high selectivities for particular
gas separations. Prior to the use of concentrated EB solutions, the
formation of integrally skinned asymmetric membranes was not possible,
since films and fibers made from <5% w/w polyaniline solutions were
found to disintegrate during the IP process.
Immersionniederschlag der Lösungen, die 15%-30% haben (w/w) und verschiedene Molekulargewichte der emeraldine Unterseite Form von polyaniline in den polaren aprotic Lösungsmitteln werden zu enthäuteten asymetrischen Membranen und zu den Fasern der Form integral gezeigt, die Hautschichten haben
