Locating sulfonic acid groups on various side chains to poly(arylene ether sulfone)s: Effects on the ionic clustering and properties of proton-exchange membranes

Jutemar, Elin Persson; Jannasch, Patric

doi:10.1016/j.memsci.2010.01.036

Cited by 75 publications

(61 citation statements)

References 48 publications

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“…[ 38 ] SAXS analysis reveals that the longer side chains in 8b -e promote the formation of ionic clusters, whereas ionic clustering in 8a , with its shorter side chains, is almost completely suppressed relative to ionic clustering of a main-chain SPAES ( 8f ). Promotion of ionic clustering leads to higher proton conductivity, with conductivity for these polymers at low to moderate RH (35-70%) increasing with IEC as well as with increasing side chain length.…”

Section: Sulfonated Poly(aryl Ether Sulfones)mentioning

confidence: 98%

Structure‐Morphology‐Property Relationships of Non‐Perfluorinated Proton‐Conducting Membranes

2010

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A fundamental understanding of structure-morphology-property relationships of proton exchange membranes (PEMs) is crucial in order to improve the cost, performance, and durability of PEM fuel cells (PEMFCs). In this context, there has been an explosion over the past five years in the volume of research carried out in the area of non-perfluorinated, proton-conducting polymer membranes, with a particular emphasis on exploiting phase behavior associated with block and graft copolymers. This progress report highlights a selection of interesting studies in the area that have appeared since 2005, which illustrate the effects of factors such as acid and water contents and morphology upon proton conduction. It concludes with an outlook on future directions.

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Section: Sulfonated Poly(aryl Ether Sulfones)mentioning

confidence: 98%

Structure‐Morphology‐Property Relationships of Non‐Perfluorinated Proton‐Conducting Membranes

2010

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“…Different strategies have been proposed to improve aggregation of ionic clusters in non-fluorinated PEMs [5,6]. Block, grafted and semi-interpenetrating networks (sIPNs) are typical methods to prepare hydrophilic-hydrophobic dual phase continuous morphology [7][8][9][10]. Self-assembly induced by electric field, uniaxial prestretching and amphiprotic molecules have been reported to enhance the microphase separation and improve interconnection of proton conductive channels [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Electrospun nanofiber enhanced sulfonated poly (phthalazinone ether sulfone ketone) composite proton exchange membranes

Zhang

Gong

et al. 2015

Journal of Membrane Science

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“…Meanwhile a weak ionomer peak appeared at around 3.7 nm À1 , and this may be attributed to some sulfonic acid groups close to main chain with decreased mobility during the membrane formation. 38 As a consequence, a longer pendent group will be introduced into this series of polymer and further investigation is on going.…”

Section: Morphologymentioning

confidence: 99%

Polymer electrolyte membranes based on poly(arylene ether)s with penta-sulfonated pendent groups

et al. 2013

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The preparation and characterization of new polymeric ionomers based on a fully aromatic poly(arylene ether) backbone with locally pentasulfonated pendent groups for applications as proton exchange membranes is reported. The high molecular weight sulfonated polymers were obtained by the polycondensation of new (2,6-difluorophenyl) (4-(1,2,3,4,5-pentaphenylbenzene)phenyl)methanone, 4,4 0 -difluorodiphenyl methanone, and 4,4 0 -dihydroxydiphenylsulfone, followed by sulfonation using sulfuric acid in high yields. The polymers produced tough, flexible, and transparent membranes by solvent casting. Membranes with ion exchange capacities between 0.8 and 1.7 mEq g -1 showed high proton conductivities and low methanol permeabilities. Compared to Nafion 117, these sulfonated membranes exhibited better microphase separation morphologies. The fully humidified membranes also exhibited considerably good mechanical properties, with tensile strengths from 35 to 45 MPa and elongations at break from 23 to 49%. This investigation demonstrates a controllable high density sulfonated side group of a poly(arylene ether sulfone) membrane with tunable and balanced properties, which is promising for proton exchange membrane fuel cell technology.

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Locating sulfonic acid groups on various side chains to poly(arylene ether sulfone)s: Effects on the ionic clustering and properties of proton-exchange membranes

Cited by 75 publications

References 48 publications

Structure‐Morphology‐Property Relationships of Non‐Perfluorinated Proton‐Conducting Membranes

Structure‐Morphology‐Property Relationships of Non‐Perfluorinated Proton‐Conducting Membranes

Electrospun nanofiber enhanced sulfonated poly (phthalazinone ether sulfone ketone) composite proton exchange membranes

Polymer electrolyte membranes based on poly(arylene ether)s with penta-sulfonated pendent groups

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