Polyelectrolyte microcapsules as ionic liquid reservoirs within ionomer membrane to confer high anhydrous proton conductivity
Access Status
Authors
Date
2015Type
Metadata
Show full item recordCitation
Source Title
ISSN
School
Collection
Abstract
© 2015 Elsevier B.V. All rights reserved. Herein, novel composite membranes are prepared by embedding methacrylic acid polyelectrolyte microcapsules (PMCs) into sulfonated poly(ether ether ketone) (SPEEK) matrix, followed by impregnating imidazole-type ionic liquids (ILs). Within the composite membrane, the lumens of PMCs act as IL reservoirs, which provide large space for IL storage and thus significantly elevate the IL uptake. The IL leaching measurement suggests that the cross-linked shells of PMCs manipulate the IL release, endowing the composite membrane with high IL retention. Moreover, the high IL retention renders the composite membrane more anhydrous hopping sites (e.g., the imidazole groups on IL and the acid-base pairs between imidazole and sulfonic acid groups), imparting a facilitated proton conduction via Grotthuss mechanism. In particular, the composite membrane containing 12% PMCs achieves a high anhydrous proton conductivity of 33.7 mS cm-1at 150°C. The same membrane also exhibits a surprising steady-state IL retention of 36.9% after leaching in liquid water.
Related items
Showing items related by title, author, creator and subject.
-
Rajaeian, Babak (2012)Thin film composite (TFC) membranes have long been used by many large-scale applications (i.e., water and wastewater treatment). Recently, conventional polymeric TFC membranes are facing with short longevity due to high ...
-
Li, D.; He, L.; Dong, Dehua; Forsyth, M.; Wang, H. (2012)Silicalite–polyamide composite membranes were synthesized via interfacial polymerization on a commercial polysulfone substrate, for the purpose of studying the effect of the addition of silicalite nanocrystals on the ...
-
Zhu, J.; Zhang, Y.; Tian, M.; Liu, Jian (2015)© 2015 American Chemical Society. A facile and novel method for the fabrication of mixed matrix membranes (MMMs) has been developed, i.e., in situ synthesis of quaternized polyethylenimine (QPEI) soft nanoparticles (SNPs) ...