| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an ion exchange double-layered film for reverse electrodialysis power generation having excellent electric property, mechanical property, and fouling resistance performance. <P>SOLUTION: An ion exchange double-layered film for reverse electrodialysis power generation has an ion exchange layer (A) comprising a polymer having an ion exchange group selected from a cation exchange group or an anion exchange group, and a porous support layer (B). The polymer is a vinyl alcohol polymer in which a molar ratio of a total of vinyl alcohol unit and vinyl ester unit and a unit having the ion exchange group is in a range of 80:20 to 99.5:0.5. The porous support layer (B) has a porous support layer (B1), and a porous support layer (B2) formed on the porous support layer (B1) and having lower porosity than that of the porous support layer (B1). The porous support layer (B1), the porous support layer (B2), and the ion exchange layer (A) are placed in this order, or at least a part of the ion exchange layer (A) is included in the porous support layer (B2) and not included in the porous support layer (B1). <P>COPYRIGHT: (C)2013,JPO&INPIT |
