High Water Diffusivity in Low Hydration Plasma-Polymerised Proton Exchange Membranes
This paper compares proton diffusion through plasma-polymerised proton-exchange membranes (PEMs) produced using traditional wet-chemical methods (Nafion®) and those produced using plasma-polymerisation. Using quasielastic neutron scattering and a simple model of proton motion we find the measured diffusion-rate of protons in the plasma-polymerised material and Nafion® is the same (within 1 standard error) even though the plasma-polymerised membrane has 80 % less water than the Nafion®. We attribute this result to the highly cross-linked structure of the plasma-polymerised membrane.
Jian-Feng Nie and Allan Morton
V. K. Peterson et al., "High Water Diffusivity in Low Hydration Plasma-Polymerised Proton Exchange Membranes", Materials Science Forum, Vols. 654-656, pp. 2871-2874, 2010