Improvement in the mechanical properties, proton conductivity, and methanol resistance of highly branched sulfonated poly(arylene ether)/graphene oxide grafted with flexible alkylsulfonated side chains nanocomposite membranes

2018 ◽  
Vol 378 ◽  
pp. 451-459 ◽  
Author(s):  
Dong Liu ◽  
Jinhua Peng ◽  
Zhuoyao Li ◽  
Bin Liu ◽  
Lei Wang
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Proton Conductivity ◽  
Side Chains ◽  
Nanocomposite Membranes ◽  
Arylene Ether ◽  
Sulfonated Poly

Highly selective sulfonated Poly (arylene ether nitrile) composite membranes containing copper phthalocyanine grafted graphene oxide for direct methanol fuel cell

2021 ◽  
pp. 095400832110394
Author(s):  
Yan Ma ◽  
Kaixu Ren ◽  
Ziqiu Zeng ◽  
Mengna Feng ◽  
Yumin Huang
Keyword(s):  
Graphene Oxide ◽  
Proton Conductivity ◽  
Direct Methanol Fuel Cells ◽  
Copper Phthalocyanine ◽  
Composite Membranes ◽  
Proton Exchange ◽  
Methanol Permeability ◽  
Arylene Ether ◽  
Direct Methanol ◽  
Sulfonated Poly

To improve the performances of sulfonated poly (arylene ether nitrile) (SPEN)–based proton exchange membranes (PEMs) in direct methanol fuel cells (DMFCs), the copper phthalocyanine grafted graphene oxide (CP-GO) was successfully prepared via in situ polymerization and subsequently incorporated into SPEN as filler to fabricate a series of SPEN/CP-GO-X (X represents for the mass ratio of CP-GO) composite membranes. The water absorption, swelling ratio, mechanical properties, proton conductivity, and methanol permeability of the membranes were systematically studied. CP-GO possesses good dispersion and compatibility with SPEN matrix, which is propitious to the formation of strong interfacial interactions with the SPEN, so as to provide more efficient transport channels for proton transfer in the composite membranes and significantly improve the proton conductivity of the membranes. Besides, the strong π–π conjugation interactions between CP-GO and SPEN matrix can make the composite membranes more compact, blocking the methanol transfer in the membranes, and significantly reducing the methanol permeability. Consequently, the SPEN/CP-GO-1 composite membrane displayed outstanding tensile strength (58 MPa at 100% RH and 25°C), excellent proton conductivity (0.178 S cm−1 at 60°C), and superior selectivity (5.552 × 105 S·cm−3·s). This study proposed a new method and strategy for the preparation of high performance PEMs.

scholarly journals Nitrile functionalized graphene oxide for highly selective sulfonated poly(arylene ether nitrile)-based proton-conducting membranes

RSC Advances ◽  
2017 ◽  
Vol 7 (5) ◽  
pp. 2971-2978 ◽  
Author(s):  
Mengna Feng ◽  
Tao Cheng ◽  
Xu Huang ◽  
Yumin Huang ◽  
Xiaobo Liu
Keyword(s):  
Graphene Oxide ◽  
Proton Conductivity ◽  
Interfacial Interaction ◽  
Functionalized Graphene ◽  
Functionalized Graphene Oxide ◽  
Proton Conducting ◽  
Proton Conducting Membrane ◽  
Arylene Ether ◽  
Conducting Membranes ◽  
Sulfonated Poly

The incorporation of 4-(3-aminophenoxy)phthalonitrile grafted graphene oxide into SPEN proton-conducting membrane was proved to be an effective way to improve the interfacial interaction and proton conductivity performance.

scholarly journals Sulfonated poly(arylene ether nitrile)-based composite membranes enhanced with Ca2+ bridged carbon nanotube-graphene oxide networks

2022 ◽  
Author(s):  
Mengna Feng ◽  
Yan Ma ◽  
JiaJia Chang ◽  
Jing Lin ◽  
Ying Xu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Proton Conductivity ◽  
Dimensional Stability ◽  
Proton Exchange Membrane ◽  
Three Dimensional ◽  
Composite Membranes ◽  
Proton Exchange ◽  
Dimensional Structure ◽  
Arylene Ether ◽  
Sulfonated Poly

Abstract As the core component of proton exchange membrane fuel cell, proton exchange membranes (PEM) have attracted much attention of researchers. To trade-off the proton conduction, dimensional stability and anti-oxidation ability, graphene oxide (GO) and acidized multi-walled carbon nanotubes (MWCNT) using calcium ion as coordination bridge (GO-Ca2+-MWCNT) was synthesized, and then incorporating into sulfonated poly(arylene ether nitrile) (SPEN) to fabricate SPEN/GO-Ca2+-MWCNT organic-inorganic composite membranes by solution-casting method and explore the influence of varying loading on performances as PEM. It was found that the proton conductivity of the composite membranes was higher than that of SPEN, while maintaining better dimensional stability, excellent anti-oxidation ability and good mechanical properties. All of these were attributed to the formation of three-dimensional structure between GO and MWCNT bridged by Ca2+. Particularly, the SPEN/GO-Ca2+-MWCNT-1 composite membrane exhibited excellent tensile strength of 71.45 MPa, better thermal stability as well as high proton conductivity (0.054 S/cm at 30 ℃, and 0.193 S/cm at 90 ℃), above 10-2 S/cm, satisfying the requirement of fuel cells. All in all, the results indicate that the filler with three-dimensional network structure can effectively improve the performances of SPEN, and the prepared composite membranes show potential applications in many fields.

scholarly journals Sulfonated poly(arylene ether sulfone) functionalized polysilsesquioxane hybrid membranes with enhanced proton conductivity

e-Polymers ◽  
2020 ◽  
Vol 20 (1) ◽  
pp. 430-442 ◽  
Author(s):  
Rajdeep Mukherjee ◽  
Arun Kumar Mandal ◽  
Susanta Banerjee
Keyword(s):  
Proton Conductivity ◽  
Sol Gel ◽  
Composite Membranes ◽  
Casting Technique ◽  
Force Microscopy ◽  
Arylene Ether ◽  
Transmission Electron ◽  
Uniform Dispersion ◽  
Solution Casting Technique ◽  
Sulfonated Poly

AbstractSulfopropylated polysilsesquioxane and –COOH containing fluorinated sulfonated poly(arylene ether sulfone) composite membranes (SPAES-SS-X) have been prepared via an in situ sol–gel reaction through the solution casting technique. The composite membranes showed excellent thermal and chemical stability, compared to the pristine SPAES membrane. The uniform dispersion of the sulfonated SiOPS nanoparticles on the polymer matrix was observed from the scanning electron microscope images. Atomic force microscopy and transmission electron microscopy images indicated significantly better phase-separated morphology and connectivity of the ionic domains of the composite membranes than the pristine SPAES membrane. The composite membranes showed considerable improvement in proton conductivity and oxidative stability than the pristine copolymer membrane under similar test conditions.

scholarly journals Sulfonated Binaphthyl-Containing Poly(arylene ether ketone)s with Rigid Backbone and Excellent Film-Forming Capability for Proton Exchange Membranes

Polymers ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1287 ◽  
Author(s):  
Wenmeng Zhang ◽  
Shaoyun Chen ◽  
Dongyang Chen ◽  
Zhuoliang Ye
Keyword(s):  
Mechanical Properties ◽  
Proton Conductivity ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Thermal Stabilities ◽  
Chemical Structures ◽  
Arylene Ether ◽  
Film Forming ◽  
Ether Ketone ◽  
Microscopic Morphology

Sterically hindered (S)-1,1′-binaphthyl-2,2′-diol had been successfully copolymerized with 4,4′-sulfonyldiphenol and 4,4′-difluorobenzophenone to yield fibrous poly(arylene ether ketone)s (PAEKs) containing various amounts of binaphthyl unit, which was then selectively and efficiently sulfonated using ClSO3H to yield sulfonated poly(arylene ether ketone)s (SPAEKs) with ion exchange capacities (IECs) ranging from 1.40 to 1.89 mmol·g−1. The chemical structures of the polymers were confirmed by 2D 1H–1H COSY NMR and FT-IR. The thermal properties, water uptake, swelling ratio, proton conductivity, oxidative stability and mechanical properties of SPAEKs were investigated in detail. It was found that the conjugated but non-coplanar structure of binaphthyl unit endorsed excellent solubility and film-forming capability to SPAEKs. The SPAEK-50 with an IEC of 1.89 mmol·g−1 exhibited a proton conductivity of 102 mS·cm−1 at 30 °C, much higher than that of the state-of-the-art Nafion N212 membrane and those of many previously reported aromatic analogs, which may be attributed to the likely large intrinsic free volume of SPAEKs created by the highly twisted chain structures and the desirable microscopic morphology. Along with the remarkable water affinity, thermal stabilities and mechanical properties, the SPAEKs were demonstrated to be promising proton exchange membrane (PEM) candidates for potential membrane separations.

Crosslinked tri-side-chain-type sulfonated poly(arylene ether ketones) with enhanced proton conductivity by a Friedel–Crafts acylation reaction

RSC Advances ◽  
2014 ◽  
Vol 4 (94) ◽  
pp. 51916-51925 ◽  
Author(s):  
Liyuan Zhang ◽  
Duo Qi ◽  
Gang Zhang ◽  
Chengji Zhao ◽  
Hui Na
Keyword(s):  
Proton Conductivity ◽  
Side Chain ◽  
Methanol Crossover ◽  
Acylation Reaction ◽  
Arylene Ether ◽  
Chain Type ◽  
Sulfonated Poly

Cross-linked poly(arylene ether ketones) containing multi-pendent sulfonic groups were prepared by the Friedel–Crafts acylation reaction in order to solve the problem of high methanol crossover and maintain other high performances at the same time.

Synthesis and properties poly(arylene ether sulfone)s with pendant hyper-sulfonic acid

RSC Advances ◽  
2015 ◽  
Vol 5 (48) ◽  
pp. 38298-38307 ◽  
Author(s):  
Jinhui Pang ◽  
Sinan Feng ◽  
Haibo Zhang ◽  
Zhenhua Jiang ◽  
Guibin Wang
Keyword(s):  
Proton Conductivity ◽  
Dimensional Stability ◽  
Sulfonic Acid ◽  
Side Chains ◽  
High Proton Conductivity ◽  
Arylene Ether ◽  
High Proton ◽  
Sulfonic Acid Groups ◽  
Aromatic Side Chains

A novel poly(arylene ether sulfone)s with pendant multiple sulfonic acid groups on aromatic side chains was prepared by graft method, they displayed high proton conductivity and good dimensional stability.

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