Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 31, Issue 5, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202006768
Keywords
anion exchange membranes; cationic species concentration; electrokinetic concentration; ion concentration polarization; membrane fabrication
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Funding
- National Research Foundation of Korea (NRF) - Korean Government (MSIP) [2020R1A2C2007017]
- National Research Foundation of Korea [2020R1A2C2007017] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The novel multiscale-porous anion exchange membrane (MP-AEM) enables convenient and scalable electrokinetic concentration of cationic species by overcoming the intrinsic limitations of traditional AEM materials. The MP-AEM-embedded electrokinetic concentrator is fabricated in a highly simplified manner with only a simple insertion and assembly process. The concentration performance of the MP-AEM-embedded concentrator is demonstrated to enrich positively charged samples with enrichment factors of up to 500, making cationic electrokinetic concentration more accessible and scalable for various applications.
A device able to electrokinetically concentrate cationic samples has many potential medical and industrial applications, but until now has remained undeveloped due to the lack of a commercial anion-permselective material leading to a prohibitively complex fabrication procedure. Herein, a novel multiscale-porous anion exchange membrane (MP-AEM) that enables the convenient and scalable electrokinetic concentration of cationic species is proposed. A mechanically enhanced multiscale-porous structure with a solid framework is realized by adopting polyester resin as an additive to overcome the intrinsic limitations of the AEM material. The scalable MP-AEM-embedded electrokinetic concentrator is devised based on the peculiar properties of the MP-AEM that for allow both ion and fluid transport. With the MP-AEM, the concentrator is fabricated in a highly streamlined manner consisting only of a simple insertion and assembly. The concentration performance of the MP-AEM-embedded electrokinetic concentrator is demonstrated with a positively charged fluorescent dye and a fluorescein-labeled protein, and the results show enrichment factors of 250 and 500, respectively. The MP-AEM makes cationic electrokinetic concentration more accessible and scalable, thereby enabling further progress in a wide range of fields.
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