H3P04 / Oxide Nanoparticles / Polymer Composites as Proton Conducting Membranes

Abstract

Stable sols of 60 nm colloidal zirconia have been prepared by thermolysis of zirconium acetate. The surface complexing acetate groups have been replaced by phosphoric acid groups Phosphate grafting has been characterized by dynamic light scattering, infrared spectroscopy, P-31 nuclear magnetic resonance and impedance spectroscopy measurements. These systems give acid and proton conductive particles (4.10(exp -5) S./cm at 70% relative humidity). H3PO4/ZrO2/PVDF-co-HFP composite membranes have been synthesized. Impedance spectroscopy measurements allow discrimination between proton conduction at the surface of the phosphated particles and within free H3PO4 in the polymer. For the highest H3PO4/ZrO2 ratios, the latter phenomenon prevails, giving a proton conductivity of 6.10(exp -4) S./cm at 70% R.H.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 2001
Accession Number
ADP012247

Entities

People

  • D. Carriere
  • J. P. Boilot
  • M. Moreau
  • P. Barboux

Organizations

  • École polytechnique

Tags

DTIC Thesaurus Topics

  • Acetic Acid
  • Composite Materials
  • Diffraction
  • Fluoropolymers
  • Frequency
  • Infrared Spectra
  • Magnetic Resonance
  • Materials
  • Measurement
  • Nanocomposites
  • Nuclear Magnetic Resonance
  • Oxides
  • Particles
  • Polymer Matrix Composites
  • Scattering
  • Spectra
  • Spectroscopy

Fields of Study

  • Materials science

Readers

  • Nanocomposite Materials Science
  • Organic Chemistry
  • Plasma Physics / Magnetohydrodynamics

Technology Areas

  • Biotechnology