Solvent transport model for polyamide nanofilm membranes based on accurate Hansen solubility parameters

Min Gyu Shin, Wansuk Choi, June Huh, William D. Mulhearn, Jung Sun Hwang, Christopher M. Stafford, Jeong F. Kim, Jung Hyun Lee

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

Polyamide (PA) nanofilm membranes for solvent filtration are widely used in various industries. However, reliable models that can describe solvent transport in PA membranes have yet to be developed owing to measurement challenges associated with the highly irregular, ultrathin, and crosslinked PA structure which hampers the accurate estimation of solvent−membrane affinity. In this study, we determined the Hansen solubility parameters (HSPs) of crosslinked PA membranes by quantifying the swelling degrees of a molecular layer-by-layer-assembled, model PA nanofilm in various solvents via in-situ atomic force microscopy. The newly determined HSPs of the PA layer, in combination with free volume and Flory–Huggins solution theories, were incorporated into the solution-diffusion model. Our refined solution-diffusion model accurately predicted the permeance of 16 different solvents by faithfully capturing the characteristics of solvent−membrane affinity. Our study reveals practical and fundamental insights into solvent transport in PA membranes along with providing robust tools for characterizing nanofilm properties.

Original languageEnglish
Article number121505
JournalJournal of Membrane Science
Volume674
DOIs
Publication statusPublished - 2023 May 15

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea grant ( 2019R1A2C1002333 and 2022R1A5A1032539 ).

Publisher Copyright:
© 2023 Elsevier B.V.

Keywords

  • Hansen solubility parameter
  • Membrane transport model
  • Organic solvent filtration
  • Polyamide membrane
  • Polymer swelling

ASJC Scopus subject areas

  • Biochemistry
  • General Materials Science
  • Physical and Theoretical Chemistry
  • Filtration and Separation

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