scholarly journals Preparation of Graft Poly(Arylene Ether Sulfone)s-Based Copolymer with Enhanced Phase-Separated Morphology as Proton Exchange Membranes via Atom Transfer Radical Polymerization

Polymers ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1297 ◽  
Author(s):  
Yang Zhao ◽  
Xue Li ◽  
Zhongyang Wang ◽  
Xiaofeng Xie ◽  
Wei Qian
Keyword(s):  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Polymer Electrolytes ◽  
Proton Exchange Membranes ◽  
Proton Exchange ◽  
Atom Transfer ◽  
High Proton Conductivity ◽  
Arylene Ether ◽  
Transmission Electron ◽  
High Proton

Novel proton exchange membranes (PEMs) based on graft copoly(arylene ether sulfone)s with enhanced phase-separated morphology were prepared using atom transfer radical polymerization (ATRP). A series of PEMs with different graft lengths and sulfonation degrees were prepared. The phase-separated morphologies were confirmed by transmission electron microscopy. Among the membranes prepared and evaluated, PAESPS18S2 exhibited considerably high proton conductivity (0.151 S/cm, 85 °C), benefitting from the graft polymer architecture and phase-separated morphology. The membranes also possessed excellent thermal and chemical stabilities. Highly conductive and stable copoly(arylene ether sulfone)-based membranes would be promising candidates as polymer electrolytes for fuel cell applications.

scholarly journals Synthesis and characterization of a novel crosslinkable side-chain sulfonated poly(arylene ether sulfone) copolymer proton exchange membranes

RSC Advances ◽  
2020 ◽  
Vol 10 (42) ◽  
pp. 24772-24783 ◽  
Author(s):  
Shouping Wang ◽  
Fugang He ◽  
Qiang Weng ◽  
Diao Yuan ◽  
Pei Chen ◽  
...  
Keyword(s):  
Single Cell ◽  
Proton Exchange Membranes ◽  
Proton Exchange ◽  
Side Chain ◽  
Synthesis And Characterization ◽  
High Proton Conductivity ◽  
Arylene Ether ◽  
High Proton ◽  
Sulfonated Poly

A series of novel crosslinkable and crosslinked side-chain SPAES has been prepared. The S-SPAES(1/2) has high proton conductivity and acceptable single-cell performance.

scholarly journals Preparation of poly(styrenesulfonic acid) grafted Nafion with a Nafion-initiated atom transfer radical polymerization for proton exchange membranes

RSC Advances ◽  
2017 ◽  
Vol 7 (59) ◽  
pp. 37255-37260 ◽  
Author(s):  
Kang-Jen Peng ◽  
Juin-Yih Lai ◽  
Ying-Ling Liu
Keyword(s):  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Graft Copolymers ◽  
Proton Exchange Membranes ◽  
Proton Exchange ◽  
Atom Transfer

Nafion-initiated atom transfer radical polymerization to prepare graft copolymers of Nafion for proton exchange membranes.

High proton conductivity of sulfonated methoxyphenyl-containing poly(arylene ether ketone) for proton exchange membranes

RSC Advances ◽  
2015 ◽  
Vol 5 (130) ◽  
pp. 107982-107991 ◽  
Author(s):  
Bo Dong ◽  
Yan Wang ◽  
Jinhui Pang ◽  
Shaowei Guan ◽  
Zhenhua Jiang
Keyword(s):  
Mechanical Properties ◽  
Proton Conductivity ◽  
Proton Exchange Membranes ◽  
Proton Exchange ◽  
High Proton Conductivity ◽  
Arylene Ether ◽  
High Proton ◽  
Ether Ketone ◽  
Polyelectrolyte Membrane

A polyelectrolyte membrane based on sulfonated methoxyphenyl-containing poly(arylene ether ketone) (SMP-PAEK) was obtained, which exhibited suitable proton conductivities and excellent mechanical properties.

Sulfonated poly (arylene ether sulfone)-graft-sulfonated poly (vinyl alcohol) proton exchange membranes: Improved proton selectivity

2020 ◽  
pp. 095400832096816
Author(s):  
Hailin Yu ◽  
Yinghan Wang
Keyword(s):  
Vinyl Alcohol ◽  
Substitution Reaction ◽  
Proton Exchange Membranes ◽  
Proton Exchange ◽  
Methanol Permeability ◽  
Poly Vinyl Alcohol ◽  
H Nmr ◽  
Arylene Ether ◽  
High Proton ◽  
Sulfonated Poly

Aldehyde terminated sulfonated poly (arylene ether sulfone) (SPAES-CHO) is prepared by a series of nucleophilic substitution reaction based on SPAES in this paper. Novel SPAES-graft-SPVA (SPAES-g-SPVA) membranes are fabricated by acetal reaction between SPAES-CHO and different amounts of sulfonated poly (vinyl alcohol) (SPVA). The 1H-NMR and FTIR indicate the successful preparation of SPAES-CHO and SPAES-g-SPVA membranes. With the introduction of SPVA, the SPAES-g-SPVA membranes have much lower methanol permeability than pure SPAES membrane and Nafion117 membrane. The methanol permeability coefficients of the SPAES-g-SPVA membranes decrease from 3.41 × 10−7 cm2 s−1 to 1.67 × 10−7 cm2 s−1 with the increase of SPVA content. And the proton conductivity of all the membranes is higher than 15 mS cm−1 at 25°C. Moreover, SPAES-g-SPVA membranes exhibit high proton selectivity. Especially, SPAES-g-SPVA-30% membrane has the highest proton selectivity, which is nearly five times higher than Nafion117.

scholarly journals Immobilisation and Release of Radical Scavengers on Nanoclays for Chemical Reinforcement of Proton Exchange Membranes

Membranes ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 208
Author(s):  
Alia Akrout ◽  
Aude Delrue ◽  
Marta Zatoń ◽  
Fanny Duquet ◽  
Francesco Spanu ◽  
...  
Keyword(s):  
Composite Membranes ◽  
Proton Exchange Membranes ◽  
Ceo2 Nanoparticles ◽  
Proton Exchange ◽  
Radical Scavenger ◽  
Radical Scavengers ◽  
Amino Groups ◽  
High Proton Conductivity ◽  
High Proton ◽  
Radical Attack

Mechanical and chemical stability of proton exchange membranes are crucial requirements for the development of fuel cells for durable energy conversion. To tackle this challenge, bi-functional nanoclays grafted with amino groups and with embedded radical scavengers, that is, CeO2 nanoparticles were incorporated into Aquivion® ionomer. The composite membranes presented high proton conductivity and increased stability to radical attack compared to non-modified Aquivion membranes, demonstrating the effectiveness of the approach based on radical scavenger immobilisation and release from clay nanocontainers.

scholarly journals Synthesis of Highly Sulfonated Poly(arylene ether) Containing Multiphenyl for Proton Exchange Membrane Materials

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Yi-Chiang Huang ◽  
Ruei-Hong Tai ◽  
Hsu-Feng Lee ◽  
Po-Hsun Wang ◽  
Ram Gopal ◽  
...  
Keyword(s):  
Proton Exchange Membrane ◽  
Hydrolytic Stability ◽  
Exchange Capacity ◽  
Proton Exchange ◽  
Chemical Structures ◽  
Arylene Ether ◽  
Transmission Electron ◽  
High Proton ◽  
Exchange Membrane ◽  
Sulfonated Poly

A series of sterically hindered, sulfonated, poly(arylene ether) polymers were synthesized by nucleophilic polycondensation reaction using 4,4′′′′-difluoro-3,3′′′′-bistrifluoromethyl-2′′,3′′,5′′,6′′-tetraphenyl-[1,1′;4′,1′′;4′′,1′′′;4′′′,1′′′′]-pentaphenyl and 4,4′-biphenol and were prepared through postpolymerization sulfonation. The chemical structures were confirmed by1H NMR. Subsequent to sulfonation, solvent-casting membranes were provided ion exchange capacity (IEC) values ranging from 0.39 to 2.90 mmol/g. Proton conductivities of membranes ranged from 143 to 228 mS/cm at 80°C under fully humidified conditions which were higher than that of Nafion 117. The membrane also exhibited considerably dimension stability, oxidative stability, and hydrolytic stability. The microphase structure was investigated by transmission electron microscopy (TEM) and the ionic aggregation of sulfonic acid groups exhibited spherical ionic clusters with well-developed phase separated morphology. The results indicated that the membranes are promising candidates for application as proton exchange membranes. This investigation demonstrates introducing multiphenylated moieties to create a high free volume polymer that provides dimensionally stable and high proton conductivity membranes.

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