Indexed by:
期刊论文
First Author:
Chen, Wanting
Correspondence Author:
Wu, XM; He, GH (reprint author), Dalian Univ Technol, Sch Chem Engn, Res & Dev Ctr Membrane Sci & Technol, State Key Lab Fine Chem, Dalian 116024, Peoples R China.; He, GH (reprint author), Dalian Univ Technol, Sch Petr & Chem Engn, Panjin 124221, Peoples R China.
Co-author:
Hu, Mengmeng,Wang, Haochen,Wu, Xuemei,Gong, Xue,Yan, Xiaoming,Zhen, Dongxing,He, Gaohong
Date of Publication:
2017-08-07
Journal:
JOURNAL OF MATERIALS CHEMISTRY A
Included Journals:
SCIE、EI、Scopus
Document Type:
J
Volume:
5
Issue:
29
Page Number:
15038-15047
ISSN No.:
2050-7488
Abstract:
A novel alkaline group, hexamethylenetetramine (HMTA) with four tertiary amine groups and beta-hydrogenabsent 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 degrees 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 degrees 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 degrees C for 168 h.
Translation or Not:
no
