Synthesis and characterization of sulfonated poly(ether sulfone ether ketone ketone) for proton exchange membranes

Zhou, Weihua; Xiao, Jichun; Chen, Yiwang; Zeng, Rong; Xiao, Shuqin; He, Xiaohui; Li, Fan; Song, Chen

doi:10.1002/app.32000

Cited by 10 publications

(7 citation statements)

References 74 publications

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“…The PESEKK was synthesized as described in the previous article. 29 Concentrated sulfuric acid (98%) (H 2 SO 4 ), chlorosulfonic acid and N, N-dimethylacetamide (DMAc) were purchased from Tianjin Damao Chemical Reagent Factory of China, and were used as received without further purification. Poly(ether sulfone) (PES) polymer powder was kindly provided by Nanjing Deyuan Technology Co., Ltd.…”

Section: Experimental Materialsmentioning

confidence: 99%

“…The sulfonation PESEKK was carried out in a concentrated sulfuric acid (98%) solvent using chlorosulfonic acid as a sulfonating agent following the procedure described in the previous article. 29 The SPES were prepared according to the method described by Guan et al 32 The chemical structures of SPESEKK and SPES are illustrated in Scheme 1…”

Section: Sulfonation Of Poly(ether Sulfone Ether Ketone Ketone) and Sulfonation Of Poly(ether Sulfone)mentioning

confidence: 99%

“…In the authors' previous work, 29 sulfonated poly(ether sulfone ether ketone ketone) (SPESEKK) showed low methanol permeability and perfect mechanical strength. It is worth mentioning that methanol permeability is one or two orders of magnitude lower than that of Nafion 115.…”

Section: Introductionmentioning

confidence: 99%

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Sulfonated poly(ether sulfone ether ketone ketone)/sulfonated poly(ether sulfone) blend membranes with reduced methanol permeability

Zeng

Xiao

Chen

et al. 2012

High Performance Polymers

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Proton exchange membranes were prepared by blending sulfonated poly(ether sulfone ether ketone ketone) (SPESEKK) with sulfonated poly(ether sulfone) (SPES). The morphology, tensile strength, proton conductivity and methanol permeability of the blend membranes were investigated. The scanning electron microscope and transmission electron microscope observation indicates the good dispersion of the SPES in SPESEKK polymer matrix. The addition of SPES also enhances the tensile strength of the SPESEKK membrane. The blend membrane shows lower methanol diffusivity and higher proton conductivity with comparison to the pure SPESEKK membrane, ascribing to the inhabitation of the player SPES to methanol permeation and facilitation of the increment of sulfonic acid groups to the proton transport. The SPESEKK/SPES 5 : 5 membrane exhibits an appreciable tensile strength of 52.3 MPa and a reduced methanol permeability of 6.6 Â 10 À7 cm 2 s À1 . This SPESEKK/SPES composite membrane shows a potential feasibility as a promising electrolyte for direct methanol fuel cells.

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Section: Experimental Materialsmentioning

confidence: 99%

Section: Sulfonation Of Poly(ether Sulfone Ether Ketone Ketone) and Sulfonation Of Poly(ether Sulfone)mentioning

confidence: 99%

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Sulfonated poly(ether sulfone ether ketone ketone)/sulfonated poly(ether sulfone) blend membranes with reduced methanol permeability

Zeng

Xiao

Chen

et al. 2012

High Performance Polymers

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“…The proton exchange membrane (PEM) is a key device in fuel cells, which acts as proton transferring electrolyte, as well as provides a barrier to the passage of electrons between the electrodes [2]. At the present time, per fluorinated membranes, Nafion are the most commonly used PEM around the world, due to their superior chemical and electrochemical stability, as well as high proton conductivity under fuel cell operating conditions [3].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Commercial Polyethyleneterephthalate Membrane for Fuel Cell Applications

EE¹,

MO²

2013

J Membra Sci Technol

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initiator) and plasma-induced grafting polymerizations-have been developed in the last few decades [7][8][9]. However, the UV-radiation technique is more available and less expensive than other techniques [10]. In comparison with γ-ray radiation grafting, UV-induced photografting is very simple and safe, and is less damaging to the membranes because significant degradation of the membrane main chains can be avoided [11].Several studies identify that poly(ethylene-alt-tetrafluoroethylene) (PTFE) [12][13][14], poly(vinylidene fluoride) (PVDF) [15][16][17], poly(tetrafluoroethylene-co-perfluoropropyl vinyl ether) (PFA) [18] and cross linked polytetrafluoroethylene (ETFE) [18,19] are promising base polymers. Styrene is the most frequently used monomer due to its high thermal stability and moderate sulfonation process of the aromatic ring [4]. The Polyethyleneterephthalate (PET) based proton exchange membrane for using in fuel cells was successfully prepared by gamma radiation-induced graft copolymerization of styrene monomer onto PET film, and the consequent selective sulfonation of the grafting chain in the film state using chlorosulfonic acid (CISO 3 H) by Mostak et al. [20].The present research focuses on developing a non-fluorinated, inexpensive proton exchange membrane. The PET-based PEM was prepared successfully by UV-radiation grafting of styrene onto PET films. Figure 1 shows the chemical structure of the PET monomer,

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“…However, large fuel crossover, lower operating temperature below 80°C, and high cost critically limit their widespread application 4. Therefore, sulfonated aromatic polymers have been extensively studied as alternative PEMs 4–25…”

Section: Introductionmentioning

confidence: 99%

Covalent‐ionically crosslinked sulfonated poly(arylene ether sulfone)s bearing quinoxaline crosslinkages as proton exchange membranes

Chen

2012

J of Applied Polymer Sci

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Crosslinkable sulfonated poly(arylene ether sulfone)s (SPAESs) were synthesized by copolymerization of 4,4 0 -biphenol with 2,6-difluorobenzil, 4,4 0 -difluorodiphenyl sulfone, and 3,3 0 -disulfonated-4,4 0 -difluorodiphenyl sulfone disodium salt. The corresponding covalent-ionically crosslinked SPAESs were prepared via the cyclocondensation reaction of benzil moieties in polymer chain with 3,3 0 -diaminobenzidine. The crosslinking significantly improved the membrane performance, that is, the crosslinked membranes had the lower membrane dimensional swelling, lower methanol permeability, and higher oxidative stability than the corresponding precursor membranes, with keeping the reasonably high proton conductivity. The crosslinked membrane (CS5) with measured ion exchange capacity of 1.47 meq g À1 showed a reasonably high proton conductivity of 112 mS cm À1 with water uptake of 42 wt % at 80 C, and exhibited a low methanol permeability of 2.

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Synthesis and characterization of sulfonated poly(ether sulfone ether ketone ketone) for proton exchange membranes

Cited by 10 publications

References 74 publications

Sulfonated poly(ether sulfone ether ketone ketone)/sulfonated poly(ether sulfone) blend membranes with reduced methanol permeability

Sulfonated poly(ether sulfone ether ketone ketone)/sulfonated poly(ether sulfone) blend membranes with reduced methanol permeability

Preparation and Characterization of Commercial Polyethyleneterephthalate Membrane for Fuel Cell Applications

Covalent‐ionically crosslinked sulfonated poly(arylene ether sulfone)s bearing quinoxaline crosslinkages as proton exchange membranes

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