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US 12,617,894 B2Granted
Polymer fiber screen surface modifications for cation exchange membranes
AssigneeGenesse Valley Innovations, LLC
InventorsValerie M. Farrugia, Michael S. Hawkins
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Abstract
A sulfonated polymer fiber screen and a method for fabricating the same is disclosed. For example, a composition may include a plurality of sulfonated polymer fibers. The sulfonated polymer fibers may include polyether ether ketone (PEEK) fibers or polyaryl ether ketone (PAEK) fibers that are contacted with an acid bath that includes a sulfur containing group.
Claims18
A composition, comprising:
- a plurality of sulfonated polymer fibers, wherein the plurality of sulfonated polymer fibers comprises sulfonated polyether ether ketone (PEEK) fibers or sulfonated polyaryl ether ketone (PAEK) fibers, wherein the plurality of sulfonated polymer fibers is created by contacting unsulfonated polyether ether ketone fibers or unsulfonated polyaryl ether ketone fibers with an acid bath comprising methane sulfonic acid, ethane sulfonic acid, sulfurous acid, or a combination thereof for between 2 to 5 seconds.
An article, comprising:
- a sulfonated polymer selective barrier material, wherein the sulfonated polymer selective barrier material comprises sulfonated polyether ether ketone (PEEK) fibers or sulfonated polyaryl ether ketone (PAEK) fibers, wherein the sulfonated polymer selective barrier material is created by contacting unsulfonated polyether ether ketone fibers or unsulfonated polyaryl ether ketone fibers with an acid bath comprising methane sulfonic acid, ethane sulfonic acid, sulfurous acid, or a combination thereof for between 2 to 5 seconds.
A method, comprising:
- contacting an unsulfonated polymer selective barrier material with an acid bath comprising a sulfur containing group to sulfonate the unsulfonated polymer selective barrier material in a sulfonation reaction, wherein the unsulfonated polymer selective barrier material comprises polyether ether ketone (PEEK) fibers or polyaryl ether ketone (PAEK) fibers, and wherein the unsulfonated polymer selective barrier material is contacted with the acid bath comprising methane sulfonic acid, ethane sulfonic acid, sulfurous acid, or a combination thereof for between 2 to 5 seconds;
- and
- stopping the sulfonation reaction.
Dependencies are inferred from the claim text.