Bridging the interfacial gap in mixed-matrix membranes by nature-inspired design: precise molecular sieving with polymer-grafted metal-organic frameworks

Levente Cseri, Rifan Hardian, Shizuka Anan, Hakkim Vovusha, Udo Schwingenschlögl, Peter M. Budd, Kazuki Sada, Kenta Kokado, Gyorgy Szekely

研究成果: Contribution to journalArticle査読

3 被引用数 (Scopus)

抄録

Membrane technology is a dynamically developing field of separation science that is poised to result in new and efficient processes, energy and cost savings, and sustainability benefits. A key challenge in this field is the development of highly selective membranes, which can be addressed by the development of mixed-matrix membranes (MMMs) containing fillers such as metal-organic frameworks (MOFs). However, the lack of interfacial adhesion causes nanosized gaps between the filler and the polymer matrix. In this study, we aim to elucidate the intrinsic properties of MMMs and bridge the gap between their material constituents. A series of novel membranes comprising MOF nanoparticles with similar chemical and morphological properties but increasing pore size (UiO-66-68-NH2) were prepared. The nanoparticles' surface was covalently grafted with poly(N-isopropylacrylamide) (PNIPAM) chains, which could then become entangled with the membranes' polymer matrix. Morphological characterization and organic solvent nanofiltration tests revealed that membranes with PNIPAM-grafted fillers do not suffer from the formation of pinholes at the filler-matrix interface that are detrimental to the filtration performance. For the first time, the experimental results showed an excellent match with a predictive model of nanofiltration built around the premise of liquid transport through the highly ordered pores of the MOF filler.

本文言語英語
ページ(範囲)23793-23801
ページ数9
ジャーナルJournal of Materials Chemistry A
9
42
DOI
出版ステータス出版済み - 11 14 2021

All Science Journal Classification (ASJC) codes

  • 化学 (全般)
  • 再生可能エネルギー、持続可能性、環境
  • 材料科学(全般)

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