Proton-conducting membranes from poly(ether sulfone)s grafted with sulfoalkylamine

Wang, Chenyi; Lee, So Young; Shin, Dong Won; Na, Kang; Lee, Young Moo; Guiver, Michael D.

doi:10.1016/j.memsci.2012.09.040

Cited by 74 publications

(32 citation statements)

References 47 publications

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“…In addition, the oxidative stability (420 min) of the branched polymers with pendant acid groups on the side chains was also improved compared with that of the corresponding branched polymer without pendant groups (281 min). This is attributed to the fact that in polymers [9,[25][26][27][28] with pendant acid groups on their side chains, the main polymer chain can be maintained in a hydrophobic environment. Thus, the chains initially separate into nanophases, which can reduce the probability of attack by water and peroxy radicals on the main chain, leading to excellent oxidative stability.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and properties of highly branched star-shaped sulfonated block polymers with sulfoalkyl pendant groups for use as proton exchange membranes

Xie

Tao

et al. 2016

Journal of Membrane Science

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Section: Introductionmentioning

confidence: 99%

Synthesis and properties of highly branched star-shaped sulfonated block polymers with sulfoalkyl pendant groups for use as proton exchange membranes

Xie

Tao

et al. 2016

Journal of Membrane Science

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“…As we know, Nafion® processes outstanding microphase separation ability because of its highly flexible side chain. Inspired by this, various side chain type proton exchange polyelectrolytes have been synthesized and proved to process superior performance in proton conductivity over their analogue with sulfonic acid groups randomly located along the aromatic chains 9 10 11 . Similarly, the attachment of a long flexible side chains terminated by anion conducting groups is also considered to facilitate the formation of microphase separation of AEMs.…”

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confidence: 99%

A Novel Methodology to Synthesize Highly Conductive Anion Exchange Membranes

Pan

et al. 2015

Sci Rep

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Alkaline polyelectrolyte fuel cell now receives growing attention as a promising candidate to serve as the next generation energy-generating device by enabling the use of non-precious metal catalysts (silver, cobalt, nickel et al.). However, the development and application of alkaline polyelectrolyte fuel cell is still blocked by the poor hydroxide conductivity of anion exchange membranes. In order to solve this problem, we demonstrate a methodology for the preparation of highly OH− conductive anion exchange polyelectrolytes with good alkaline tolerance and excellent dimensional stability. Polymer backbones were grafted with flexible aliphatic chains containing two or three quaternized ammonium groups. The highly flexible and hydrophilic multi-functionalized side chains prefer to aggregate together to facilitate the formation of well-defined hydrophilic-hydrophobic microphase separation, which is crucial for the superior OH− conductivity of 69 mS/cm at room temperature. Besides, the as-prepared AEMs also exhibit excellent alkaline tolerance as well as improved dimensional stability due to their carefully designed polymer architecture, which provide new directions to pursue high performance AEMs and are promising to serve as a candidate for fuel cell technology.

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“…20 Hence, it is prioritized to create polyaryl-based high performance ionomers, endowed with distinct phase separation. In this context different strategies have been explored, such as spacing of the acidic groups from the polymer backbone, 21−23 applying regular distribution of ionic functions, 24,25 synthesizing block copolymers, 26−29 graft copolymers, 30,31 and ionomers bearing PFSA. 32−34 Among the proposed alternatives the ionomers bearing perfluorosulfonic acids are characterized by higher proton conductivity, than other sulfonated ionomers, at similar IEC due to both the higher acidity of PFSA, as compared to aryl-or alkylsulfonic ones, and more pronounced phase-separated morphology.…”

Section: ■ Introductionmentioning

confidence: 99%

Highly Phase Separated Aromatic Ionomers Bearing Perfluorosulfonic Acids by Bottom-up Synthesis: Effect of Cation on Membrane Morphology and Functional Properties

et al. 2016

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Proton-conducting aromatic-based ionomers bearing superacid side chains are usually synthesized by polymer postmodification, which does not allow controlling ion exchange capacity and ionic group distribution along the ionomer and, thus, its chemical structure and functional properties. Bottom-up approach overcomes this problem. Here, we report the preparation of a novel ionic monomer and its polycondensation with commercial monomers. The obtained random ionomers are the first to show high phase separated organization at macro-, micro-, and nanoscale, common to the reference protonconducting material Nafion. Additionally, membranes were cast from the solutions of ionomers in their Li + and K + forms in order to study the cation's influence on both morphology and performance of the materials. The difference in ionic domain organization, depending on the initial cationic form of the ionomers, was reported for the first time. The proposed materials show superior proton conductivity than Nafion, especially at low relative humidity, which makes them potential substitute of the benchmarked Nafion for fuel cell application.

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Proton-conducting membranes from poly(ether sulfone)s grafted with sulfoalkylamine

Abstract: /npsi/ctrl?lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=fr Access and use of this website and the material on it are subject to the Terms and Conditions set forth at

Cited by 74 publications

References 47 publications

Synthesis and properties of highly branched star-shaped sulfonated block polymers with sulfoalkyl pendant groups for use as proton exchange membranes

Synthesis and properties of highly branched star-shaped sulfonated block polymers with sulfoalkyl pendant groups for use as proton exchange membranes

A Novel Methodology to Synthesize Highly Conductive Anion Exchange Membranes

Highly Phase Separated Aromatic Ionomers Bearing Perfluorosulfonic Acids by Bottom-up Synthesis: Effect of Cation on Membrane Morphology and Functional Properties

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