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Concentration polarization on surface patterned membranes
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  • Chuning Shang,
  • Jianzhong Xia,
  • Lili Sun,
  • Glenn Lipscomb,
  • Sui Zhang
Chuning Shang
National University of Singapore

Corresponding Author:[email protected]

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Jianzhong Xia
Shenzhen University
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Glenn Lipscomb
University of Toledo
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Sui Zhang
National University of Singapore
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Surface pattern is a promising approach to enhance membrane performance while contradictory results have been reported on concentration polarization of patterned membranes. Here, we provide an experimental and modeling study of the concentration polarization on patterned membranes by varying pattern size, solute size, surface hydrophilicity and membrane orientation. Interesting trends were observed when comparing different membrane orientation, where relative concentration polarization degree (CPD) was found to be dependent on molecular weight. Salts and small organic molecules encountered more severe CPD in the transverse mode, while molecules larger than a threshold value showed a different trend. Such threshold molecular weight increased at larger pattern size. Simulation results were consistent with experimental observations, and revealed the critical role of diffusivity on such phenomena. Results also showed more severe concentration polarization on patterned membranes in both parallel and transverse modes in most cases, compared to smooth membrane.
15 Mar 2022Submitted to AIChE Journal
16 Mar 2022Submission Checks Completed
16 Mar 2022Assigned to Editor
19 Mar 2022Reviewer(s) Assigned
19 Apr 2022Editorial Decision: Revise Major
24 May 20221st Revision Received
25 May 2022Submission Checks Completed
25 May 2022Assigned to Editor
29 May 2022Reviewer(s) Assigned
12 Jul 2022Editorial Decision: Accept
Dec 2022Published in AIChE Journal volume 68 issue 12. 10.1002/aic.17832