scholarly journals Chemical oxidation stability and anhydrous proton conductivity of polyimides/phosphoric acid/imidazole blends

2006 ◽  
Vol 56 (1) ◽  
pp. 121-125 ◽  
Author(s):  
Hongting Pu ◽  
Liming Tang
Keyword(s):  
Phosphoric Acid ◽  
Proton Conductivity ◽  
Oxidation Stability ◽  
Chemical Oxidation

Fast Proton Conductors from Inorganic-Organic Composites: I. Amorphous Phosphate-Nafion and Silicophosphate-PMA/PWA Hybrids

1999 ◽  
Vol 600 ◽  
Author(s):  
Yong-Il Park ◽  
Jae-Dong Kim ◽  
Masayuki Nagai
Keyword(s):  
Phosphoric Acid ◽  
Proton Conductivity ◽  
Proton Conductors ◽  
Phosphorus Concentration ◽  
High Proton ◽  
Proton Source ◽  
Drastic Increase ◽  
Amorphous Phosphate ◽  
Exchange Resins ◽  
Very High

AbstractA drastic increase of electrical conductivity was observed in the composite of amorphous phosphate and ion-exchange resins (Nafion) as phosphorus concentration increased. Incorporation of amorphous phosphate into Nafion caused a large increase of conductivity to about 4×10−1S/cm at 23°C. However, the fabricated composite showed very low chemical stability.A high proton conductivity was also observed in a new inorganic-organic hybrids through incorporating PMA(molibdo-phosphoric acid)/PWA(tungsto-phosphoric acid) as a proton source in amorphous silicophosphate gel structure. Obtained gels were homogeneous and chemically stable. Resulting proton conductivity is very high (up to 5.5×10−3S/cm) compared to those of silicophosphate gels.

Proton Conductivity Enhancement by Nanostructural Control of Poly(benzimidazole)‐Phosphoric Acid Adducts

2008 ◽  
Vol 20 (13) ◽  
pp. 2595-2598 ◽  
Author(s):  
Jens Weber ◽  
Klaus‐Dieter Kreuer ◽  
Joachim Maier ◽  
Arne Thomas
Keyword(s):  
Phosphoric Acid ◽  
Proton Conductivity ◽  
Conductivity Enhancement

Proton conductivity of poly(dialkyl)phosphazenes–phosphoric acid composites at low humidity

2007 ◽  
Vol 178 (25-26) ◽  
pp. 1442-1450 ◽  
Author(s):  
G DOTELLI ◽  
M GALLAZZI ◽  
M BAGATTI ◽  
E MONTONERI ◽  
V BOFFA
Keyword(s):  
Phosphoric Acid ◽  
Proton Conductivity ◽  
Low Humidity

SYNTHESIS AND ELECTRORHEOLOGY OF PHOSPHORIC ACID DOPED POLYANILINE SUSPENSIONS

2005 ◽  
Vol 19 (07n09) ◽  
pp. 1149-1155 ◽  
Author(s):  
C. H. HONG ◽  
H. J. CHOI
Keyword(s):  
Phosphoric Acid ◽  
Electric Fields ◽  
Chemical Structure ◽  
Chemical Oxidation ◽  
Chemical Oxidation Polymerization ◽  
Ft Ir ◽  
Fourier Transform Ir ◽  
Doped Polyaniline ◽  
Er Fluids ◽  
High Voltage Generator

Semiconducting phosphoric acid doped polyaniline ( PANI-H 3 PO 4) particles were synthesized by chemical oxidation polymerization, and their chemical structure and particle size were examined via Fourier transform IR spectroscopy (FT-IR) and scanning electron microscopy (SEM), respectively. Electrorheological (ER) fluids were prepared by dispersing the synthesized PANI-H 3 PO 4 particles in kerosine, and their steady shear rheological properties under applied electric fields were investigated using a rotational rheometer with a high-voltage generator. The PANI-H 3 PO 4 synthesized in this study possesses a typical ER behavior: large increase of shear stress with applied electric field strengths.

scholarly journals Amino-Functional Polybenzimidazole Blends with Enhanced Phosphoric Acid Mediated Proton Conductivity as Fuel Cell Electrolytes

2016 ◽  
Vol 217 (10) ◽  
pp. 1161-1168 ◽  
Author(s):  
David Aili ◽  
Irakli Javakhishvili ◽  
Junyoung Han ◽  
Katja Jankova ◽  
Chao Pan ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Phosphoric Acid ◽  
Proton Conductivity ◽  
Cell Electrolytes ◽  
Fuel Cell Electrolytes

Proton conductivity of smart membranes based on hydrocarbon polymers having phosphoric acid groups

2005 ◽  
Vol 739 (1-3) ◽  
pp. 153-161 ◽  
Author(s):  
Masahiro Rikukawa ◽  
Daisuke Inagaki ◽  
Keiichi Kaneko ◽  
Yuko Takeoka ◽  
Iko Ito ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Proton Conductivity ◽  
Hydrocarbon Polymers

scholarly journals Phosphoric Acid Doped Polybenzimidazole (PBI)/Zeolitic Imidazolate Framework Composite Membranes with Significantly Enhanced Proton Conductivity under Low Humidity Conditions

Nanomaterials ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 775 ◽  
Author(s):  
Jorge Escorihuela ◽  
Óscar Sahuquillo ◽  
Abel García-Bernabé ◽  
Enrique Giménez ◽  
Vicente Compañ
Keyword(s):  
Binary Mixture ◽  
Synergistic Effect ◽  
Phosphoric Acid ◽  
Proton Conductivity ◽  
Composite Membrane ◽  
Proton Transport ◽  
Composite Membranes ◽  
Zeolitic Imidazolate Framework ◽  
Low Humidity

The preparation and characterization of composite polybenzimidazole (PBI) membranes containing zeolitic imidazolate framework 8 (ZIF-8) and zeolitic imidazolate framework 67 (ZIF-67) is reported. The phosphoric acid doped composite membranes display proton conductivity values that increase with increasing temperatures, maintaining their conductivity under anhydrous conditions. The addition of ZIF to the polymeric matrix enhances proton transport relative to the values observed for PBI and ZIFs alone. For example, the proton conductivity of PBI@ZIF-8 reaches 3.1 × 10−3 S·cm−1 at 200 °C and higher values were obtained for PBI@ZIF-67 membranes, with proton conductivities up to 4.1 × 10−2 S·cm−1. Interestingly, a composite membrane containing a 5 wt.% binary mixture of ZIF-8 and ZIF-67 yielded a proton conductivity of 9.2 × 10−2 S·cm−1, showing a synergistic effect on the proton conductivity.

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