Membranes were prepared via blending CS and SF and
crosslinked with ADA. CS and SF with different weight ratios
(60%CS/40% SF and 80% CS/20% SF) were dissolved in acetic acid
aqueous solution. CS/SF was dissolved completely and then divided
into two groups: one group was added with a corresponding ratio
of ADA (1ADA:4CS/SF, w/w), the other was not. In the process of
adding with ADA, the samples were deaerated and dried in a vacuum
drying oven at 40 ◦C for about 4 h and then sprayed ADA
solution on the surface of the membranes. Finally, the samples were
dried thoroughly. Pure CS film was served as control. Samples were
stored in a refrigerated desiccator until used.