Abstract
In this work, the polysulfone (PSf)/polyacrylonitrile (PAN) blend membranes were prepared via the phase inversion method induced by immersion precipitation. The PSf/PAN blends show the partial compatibility because of the different solubility parameter of polymers and DMA test results, making the interface microvoid structure for the blend membranes easy to induce. The water permeability of the PSf/PAN blend membranes is better than that of the pure PSf membrane. The contact angle measurements indicate that the hydrophilicity of PSf/PAN membranes increases with an increase in PAN concentration in the casting solution. Furthermore, the PSf/PAN blend membranes were modified with hydrolysis in sodium hydroxide solution. Characterizations of the hydrolyzed membranes, such as pure water flux and mean pore size, are better than before. Flux recovery ratios in the protein solution increase from 49.2 to 79.5% after hydrolysis.
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