Crosslinked speek cation exchange membrane having improved chemical stability by radiation and method of preparing the same
AssigneeKorea Atomic Energy Research Institute
InventorsJunhwa Shin, Joon Yong Sohn, Ju-Myung Song, Sun-Young Lee, Hyun-Su Woo
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Abstract
Provided is a method of preparing a crosslinked sulfonated poly(ether ether ketone) (SPEEK) cation exchange membrane including: preparing a crosslinker mixture of a first crosslinker containing two or more vinyl oxy groups and a second crosslinker containing three or more vinyl groups; preparing a mother liquor containing the crosslinker mixture, a SPEEK polymer substituted with sodium, and a solvent; and casting the mother liquor and then irradiating radiation thereon.
Claims11
A method of preparing a crosslinked sulfonated poly(ether ether ketone) (SPEEK) cation exchange membrane, the method comprising:
- preparing a crosslinker mixture, wherein the crosslinker mixture comprises:
- a first crosslinker represented by Chemical Formula 1, wherein the first crosslinker is present in an amount of 60 to 95 wt % of a total amount of the crosslinker mixture;
- and
- a second crosslinker, wherein the second crosslinker comprises at least one of triallyl isocyanurate or pentaerythritol triallyl ether, and is present in an amount of 5 to 40 wt % of the total amount of the crosslinker mixture;
- preparing a mother liquor containing the crosslinker mixture, a SPEEK polymer substituted with sodium, and a solvent;
- casting the mother liquor;
- and
- irradiating the mother liquor with a radioactive ray,
- wherein A is at least one selected from the group consisting of
- and each of m and n is independently an integer of 1 to 5, and
- wherein each of R1 to R10 is independently at least one selected from the group consisting of hydrogen, and a C1˜C6 alkyl.
Dependencies are inferred from the claim text.