Pore-filled ion exchange polyelectrolyte composite membrane from which surface ion exchange polyelectrolyte has been removed and method for manufacturing same

A method of manufacturing a pore-filled ion exchange polyelectrolyte composite membrane from which a surface ion exchange polyelectrolyte has been removed, the method comprising:

• preparing an ion exchange precursor solution including an electrolyte monomer of a quaternary ammonium salt having a cationic group or a sulfonic acid-containing electrolyte monomer having an anionic group, an acrylamide-based crosslinking agent having a tertiary amine functional group, an initiator, and a solvent;
• impregnating a porous polymer support with the ion exchange precursor solution;
• feeding an upper film, the porous polymer support, and a lower film to a compression roll to compress the upper film and the lower film on upper and lower portions of the porous polymer support, respectively, wherein the compression is performed through squeeze compression to have a value smaller than the sum of the thickness of the porous polymer support and the thicknesses of the upper film and the lower film fed into the compression roll;
• preparing a pore-filled ion exchange polymer electrolyte by crosslinking the ion exchange precursor solution by irradiating ultraviolet rays to the porous polymer support on which the upper film and the lower film are compressed;
• and
• detaching, from a detachment roll, the porous polymer support containing the pore-filled ion exchange polymer electrolyte, the upper film, and the lower film, wherein a dominant surface roughness height of the pore-filled ion exchange polyelectrolyte composite membrane is from 250 nm to 350 nm;
• wherein through the detachment, a polymer resin, which is formed by polymerization through crosslinking, formed on the outside of the porous polymer support is transferred onto the upper film and the lower film and removed from the porous polymer support.