Preparation and proton conductivity of composite membranes based on sulfonated poly(phenylene oxide) and benzimidazole

2007 ◽  
Vol 52 (28) ◽  
pp. 8133-8137 ◽  
Author(s):  
Yi Feng Liu ◽  
Qin Chun Yu ◽  
Yi Hua Wu
Keyword(s):  
Proton Conductivity ◽  
Composite Membranes ◽  
Phenylene Oxide ◽  
Sulfonated Poly

On the Synthesis and Characterization of Silica-Doped/Sulfonated Poly-(2,6-Dimethyl-1,4-Phenylene Oxide) Composite Membranes for Fuel Cells

2014 ◽  
Vol 11 (4) ◽  
Author(s):  
Daniela Ebrasu ◽  
Irina Petreanu ◽  
Mihai Varlam ◽  
Dorin Schitea ◽  
Ioan Stefanescu ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Proton Conductivity ◽  
Water Uptake ◽  
Sol Gel ◽  
Composite Membranes ◽  
Proton Exchange ◽  
Differential Scanning Calorimetric ◽  
Gravimetric Analysis ◽  
Phenylene Oxide ◽  
Sulfonated Poly

The objective of this investigation is to study silica-doped/sulfonated poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) composite membranes for operation in hydrogen/oxygen proton-exchange membrane fuel cells ranging from room temperature (RT) up to 120 °C. The sulfonated PPO composite membranes were prepared using a sol–gel process employing reaction with tetra-ethoxysilane (TEOS) followed by heat treatment at 60, 90, and 120 °C, respectively. The presence of silicon oxide in the composite membranes was evaluated using FTIR spectroscopy, while thermal properties were studied using thermal gravimetric analysis-differential scanning calorimetric (TGA-DSC) measurements. Additionally, ion exchange capacity, water uptake, and proton conductivity characterizations were also carried out. It was observed that water uptake for 75% PPO sulfonated composite membrane treated at 120 °C is higher than that of NafionTM membrane and the proton conductivity value measured at 120  °C is 0.35·10−1 S/cm. Therefore, the composite membranes are potentially suitable for high temperature fuel cell applications.

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.

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.

Proton exchange composite membranes from blends of brominated and sulfonated poly(2,6-dimethyl-1,4-phenylene oxide)

2011 ◽  
Vol 124 (4) ◽  
pp. 3511-3519 ◽  
Author(s):  
Tongwen Xu ◽  
Dan Wu ◽  
Seok-Jun Seo ◽  
Jung-Je Woo ◽  
Liang Wu ◽  
...  
Keyword(s):  
Composite Membranes ◽  
Proton Exchange ◽  
Phenylene Oxide ◽  
Sulfonated Poly

scholarly journals Sulfonated Poly(ether ether ketone) Doped with Ammonium Ionic Liquids and Nano-Silicon Dioxide for Polymer Electrolyte Membranes

Polymers ◽  
2018 ◽  
Vol 11 (1) ◽  
pp. 7 ◽  
Author(s):  
Shuguo Qu ◽  
Minhui Li ◽  
Chenchen Zhang ◽  
Yuanyuan Sun ◽  
Jihai Duan ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Silicon Dioxide ◽  
Proton Conductivity ◽  
Composite Membranes ◽  
Nano Sio2 ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Ether Ketone ◽  
Nano Silicon ◽  
Sulfonated Poly

Nano-silicon dioxide (SiO2) was incorporated into the matrix of sulfonated poly(ether ether ketone) (SPEEK)/ammonium ionic liquid (AIL) membranes by solution casting, with the aim of reducing ionic liquid leaching and any consequent decrease in proton conductivity. Fourier transform infrared (FTIR) spectra results indicate incorporation of the SPEEK matrix with AIL and nano-SiO2. Scanning electron microscopy (SEM) and X–ray diffraction (XRD) images revealed that incorporation of nano-SiO2 make the ternary composite membranes more flexible. The maximum ion exchange capacity (IEC) value was 3.25 meq/g, and the net structure formed by the nano-SiO2 not only retarded AIL leaching, but also increased the proton conductivity of the composite membranes. AIL leaching from the membranes was between 20% and 30%, which was lower than that of the SPEEK/AIL membrane. The maximum proton conductivity for the SPEEK/AIL/SiO2 membranes reached 10.73 mS/cm at 393 K.

Novel composite membranes based on sulfonated poly(ether ether ketone) and adenosine triphosphate for enhanced proton conduction

RSC Advances ◽  
2015 ◽  
Vol 5 (92) ◽  
pp. 75434-75441 ◽  
Author(s):  
Yongheng Yin ◽  
Jiahui Wang ◽  
Shengtao Jiang ◽  
Xin Yang ◽  
Xuya Zhang ◽  
...  
Keyword(s):  
Proton Conductivity ◽  
Adenosine Triphosphate ◽  
Composite Membranes ◽  
Proton Conduction ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Ether Ketone ◽  
Sulfonated Poly

Novel SPEEK/ATP composite membranes were prepared via a facile method, achieving improved proton conductivity under different conditions.

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