Jump to main content
Jump to site search

Issue 29, 2017
Previous Article Next Article

Dimensionally stable hexamethylenetetramine functionalized polysulfone anion exchange membranes

Author affiliations

Abstract

A novel alkaline group, hexamethylenetetramine (HMTA) with four tertiary amine groups and β-hydrogen-absent structure, has been employed as mono-quaternization reagent to prepare HMTA mono-quaternized polysulfone anion exchange membranes (PSF-QuOH AEMs). Analyzed by molecular dynamics simulations, mono-quaternized HMTA shows a superior aggregating ability by strong electrostatic interaction with hydroxide to suppress water swelling even at high IECs. In particular, the PSF-QuOH membrane with a high IEC of 2.23 mmol g−1 exhibits a low swelling ratio of 21% even at 60 °C. The resulting high concentration of cationic groups and the interactions between multiple hydrogen atoms in HMTA and hydroxide/water are helpful to induce the formation of the continuous and efficient hydrogen-bond networks, promoting ionic transport. High hydroxide conductivity of 35 mS cm−1 is achieved at 20 °C. Excellent swelling resistance also benefits the mechanical and chemical stabilities of the PSF-QuOH membranes. A considerable mechanical strength of 17.7 MPa is observed in the fully hydrated membrane. The hydroxide conductivity is stable at around 86% of the initial value after 1 M KOH immersion at 60 °C for 168 h.

Graphical abstract: Dimensionally stable hexamethylenetetramine functionalized polysulfone anion exchange membranes

Back to tab navigation

Supplementary files

Publication details

The article was received on 08 Feb 2017, accepted on 01 Jun 2017 and first published on 01 Jun 2017


Article type: Paper
DOI: 10.1039/C7TA01218G
Citation: J. Mater. Chem. A, 2017,5, 15038-15047
  •   Request permissions

    Dimensionally stable hexamethylenetetramine functionalized polysulfone anion exchange membranes

    W. Chen, M. Hu, H. Wang, X. Wu, X. Gong, X. Yan, D. Zhen and G. He, J. Mater. Chem. A, 2017, 5, 15038
    DOI: 10.1039/C7TA01218G

Search articles by author

Spotlight

Advertisements