Fabrication of polyamide thin film composite reverse osmosis membranes via support-free interfacial polymerization

Sung Joon Park, Wansuk Choi, Seung Eun Nam, Seungkwan Hong, Jong Suk Lee, Jung-hyun Lee

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

We report a fabrication method of polyamide (PA) thin film composite reverse osmosis membranes, so-called support-free interfacial polymerization (SFIP). In contrast to conventional interfacial polymerization (IP) where a PA layer is formed in-situ on top of a support, in this SFIP method the PA layer is first formed at the interface without a support, followed by attachment onto a support. Enhancing the chemical adhesion between the PA layer and a polyacrylonitrile support through the chemical modification on the support leads to the fabrication of defect-free membranes which outperform the conventional IP-assembled membranes. Importantly, SFIP allows for the precise characterization of the PA layer and the PA-support interface by easily isolating each membrane component. SFIP produces a thinner and smoother PA structure with a more wettable and less negatively charged surface than its IP-assembled counterparts, presumably due to uniform and promoted amine diffusion during film formation. Furthermore, it was found that the bottom surface of the SFIP-assembled PA has a porous structure with higher hydrophilicity and a marginally lower negative charge than its opposite surface. The SFIP method provides a versatile platform to study the fundamental membrane structure-performance relationship and to develop high performance membranes.

Original languageEnglish
Pages (from-to)52-59
Number of pages8
JournalJournal of Membrane Science
Volume526
DOIs
Publication statusPublished - 2017 Mar 15

Fingerprint

Osmosis
reverse osmosis
Osmosis membranes
Nylons
Reverse osmosis
Polyamides
Polymerization
polymerization
membranes
Fabrication
Thin films
fabrication
composite materials
Membranes
Composite materials
thin films
Membrane structures
Polyacrylonitriles
Chemical modification
Hydrophilicity

Keywords

  • Desalination
  • Interfacial adhesion
  • Polyamide thin film composite membrane
  • Reverse osmosis
  • Support-free interfacial polymerization

ASJC Scopus subject areas

  • Biochemistry
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Filtration and Separation

Cite this

Fabrication of polyamide thin film composite reverse osmosis membranes via support-free interfacial polymerization. / Park, Sung Joon; Choi, Wansuk; Nam, Seung Eun; Hong, Seungkwan; Lee, Jong Suk; Lee, Jung-hyun.

In: Journal of Membrane Science, Vol. 526, 15.03.2017, p. 52-59.

Research output: Contribution to journalArticle

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