From the aspect of the intrinsic properties
of the membrane, as shown in Fig. 4(c), an approximately
five-fold increase from 1991.22 to 10,693.58 gas permeation
unit (GPU) was observed in the permeance of water when
the feed concentration of water was increased from 10 to
50 wt.%, whereas an approximately twenty-five-fold increase
from 1.90 to 46.60 GPU was observed in the permeance of ethyl
acetate.