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Molecular dissolution behaviors on porous membrane surface using hierarchical metal-organic framework lamellar membrane
  • +4
  • Yihao Chen,
  • Jingjing Chen,
  • Chongchong Chen,
  • Xiaoli Wu,
  • Yifan Li,
  • Jie Zhang,
  • jingtao wang
Yihao Chen

Corresponding Author:1024490175@qq.com

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Jingjing Chen
Zhengzhou University
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Chongchong Chen
Zhengzhou University
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Yifan Li
Zhengzhou University
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Jie Zhang
Zhengzhou University
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jingtao wang
Zhengzhou University
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Abstract

Lamellar membranes, especially assembled by microporous framework nanosheets, have excited interest for fast molecular permeation. However, the underlying molecular dissolution behaviors on membrane surface, especially at pore entrances, remain unclear. Here, hierarchical metal-organic framework (MOF) lamellar membranes with 7 nm-thick surface layer and 553 nm-thick support layer are prepared. Hydrophilic (–NH2) or hydrophobic (–CH3) groups are decorated at pore entrances on surface layer to manipulate wettability, while –CH3 groups on support layer provide comparable, low-resistance paths. We demonstrate that molecular dissolution behaviors are determined by molecule-molecule and molecule-pore interactions, derived from intrinsic parameters of molecule and membrane. Importantly, two dissolution model equations are established: for hydrophobic membrane surface, dissolution activation energy (ES) obeys ES=Kmln[(γL-γC)μd2], while turns to ES=Kaln[(γL-γC)δeμd2] for hydrophilic one. Particularly, hydrophilic pore entrances exert strong interaction with polar molecules, thus compensating the energy consumed by molecule rearrangement, giving fast permeation (> 270 L m-2 h-1 bar-1).
19 Sep 2022Submitted to AIChE Journal
22 Sep 2022Submission Checks Completed
22 Sep 2022Assigned to Editor
27 Sep 2022Reviewer(s) Assigned
20 Oct 2022Review(s) Completed, Editorial Evaluation Pending
22 Oct 2022Editorial Decision: Revise Major
17 Nov 20221st Revision Received
20 Nov 2022Submission Checks Completed
20 Nov 2022Assigned to Editor
20 Nov 2022Review(s) Completed, Editorial Evaluation Pending
21 Nov 2022Reviewer(s) Assigned