The effects of aspect ratio of inorganic fillers on the structure and property of composite ion-exchange membranes

Klaysom, Chalida, Moon, Seung-Hyeon, Ladewig, Bradley P., Lu, G. Q. Max and Wang, Lianzhou (2011) The effects of aspect ratio of inorganic fillers on the structure and property of composite ion-exchange membranes. Journal of Colloid and Interface Science, 363 2: 431-439. doi:10.1016/j.jcis.2011.07.071


Author Klaysom, Chalida
Moon, Seung-Hyeon
Ladewig, Bradley P.
Lu, G. Q. Max
Wang, Lianzhou
Title The effects of aspect ratio of inorganic fillers on the structure and property of composite ion-exchange membranes
Journal name Journal of Colloid and Interface Science   Check publisher's open access policy
ISSN 0021-9797
1095-7103
Publication date 2011-11-15
Sub-type Article (original research)
DOI 10.1016/j.jcis.2011.07.071
Volume 363
Issue 2
Start page 431
End page 439
Total pages 9
Place of publication Maryland Heights, MO, U.S.A.
Publisher Academic Press
Collection year 2012
Language eng
Formatted abstract
A new type of nanocomposite ion-exchange membranes containing sulfonated polyethersulfone (sPES) polymer matrix and sulfonated surface-functionalized mesoporous silica (SS) inorganic fillers was prepared. Various characterizations revealed that the addition of inorganic fillers with different shapes had a significant influence on the membrane structure. The mesoporous inorganic fillers not only created extra pore and water channels, assisting the ionic migration and improving conductivity of the composites, but also provided additional fixed charge groups upon surface modification. This allows the Donnan exclusion to work effectively and thus improve the selectivity of membranes. It was proved that the incorporation of appropriate amount of SS additive could significantly improve the conductivity (up to 20 folds) and permselectivity (about 14%) of the sPES membranes. The performance of these newly developed membranes in desalination by electrodialysis was comparable with that of a commercial membrane (FKE).

Highlights: ► Sulfonated mesoporous silica (SS) with different shapes was used as inorganic fillers. ► The composite ion-exchange membranes containing SS and sulfonated polyethersulfone were prepared. ► Aspect ratio of the fillers had significant influence on composite structures and properties. ► The composites showed very promising desalination performance in electrodialysis.
Keyword Composite ion-exchange membrane
Mesoporous silica
Aspect ratio
Electrodialysis
Desalination
Poly(ether ether ketone)
Fuel-cell applications
Transport-properties
Proton conductivity
Temperature
Performance
Parameters
Separation
Si-McM-41
Systems
PEEK
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Sun, 16 Oct 2011, 00:13:18 EST by System User on behalf of Functional Nanomaterials