Preparation and performance testing of sulfonated poly(phenylene oxide) based composite membranes for nanofiltration

2003 ◽  
Vol 91 (4) ◽  
pp. 2624-2628 ◽  
Author(s):  
Nobuhiro Nogami ◽  
Geeta Chowdhury ◽  
T. Matsuura
Keyword(s):  
Performance Testing ◽  
Composite Membranes ◽  
Phenylene Oxide ◽  
And Performance ◽  
Sulfonated Poly

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

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.

Nano Composite Membranes of Sulfonated Poly(2,6-Dimethyl-1,4-Phenylene Oxide)/Poly(2,6-Diphenyl-1,4-Phenylene Oxide) Copolymer and SiO2 for Fuel Cell Application

2007 ◽  
Vol 26-28 ◽  
pp. 835-838 ◽  
Author(s):  
Young Gi Jeong ◽  
Hye Seok Park ◽  
Dong Wan Seo ◽  
Seung Woo Choi ◽  
Whan Gi Kim
Keyword(s):  
Chlorosulfonic Acid ◽  
Composite Membranes ◽  
Sio2 Nanoparticles ◽  
Scanning Calorimetry ◽  
Nano Composite ◽  
Acid Copolymer ◽  
Phenylene Oxide ◽  
20 Nm ◽  
Sulfonated Poly ◽  
Dimethyl Phenol

The Sulfonated poly(2,6-dimethyl-1,4-phenylene oxide) / poly(2,6-diphenyl-1,4-phenylene oxide) (S-PPO) was prepared by oxidative coupling polymerization with 2,6-dimethyl phenol, 2,6-diphenyl phenol, CuCl(І) and pyridine, and followed sulfonation with chlorosulfonic acid. Copolymer was consisted of 2,6-diphenyl phenol 30 mol% and 2,6-dimethyl phenol 70 mol%. Organic-inorganic nano composite membranes were prepared with copolymer and a series of SiO2 nanoparticles (20 nm, 4, 7 and 10 wt%). The composite membranes were cast from dimethylsulfoxide solution. The membranes were studied by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). Sorption experiments were conducted to observe the interaction of sulfonated polymers with water and methanol. S-PPO copolymer and nano composite membranes exhibited proton conductivities from 0.79×10-3 to 0.98×10-3 S/cm, water uptake from 21.70 to 24.77 %, IEC from 0.720 to 0.955 meq/g and methanol diffusion coefficients from 2.97×10-7 to 3.70×10-7 cm2/S.

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