Is there any study on Nafion which reports experimental study wherein temperature was varied at constant RH and the water content in the membrane was recorded.
N.H. Jalani et al., The effect of equivalent weight, temperature, cationic forms, sorbates, and nanoinorganic additives on the sorption behavior of Nafion, Journal of Membrane Science 264(1-2), 167–175 (2005)
P. W. Majsztrik et al., Water sorption, desorption and transport in Nafion membranes,
Journal of Membrane Science 301, 93-106 (2007)
Thanks Alexandra.. I had these articles with me already. Both these articles suggest that there is an increase in water uptake from vapor at higher temperatures. However, there have been other reports where the opposite has been observed (Ref: Journal of Membrane Science 389 (2012) 43– 56). Thats why I had this doubt. The argument that few reports have made in support of lower water uptake at higher temperatures is that it becomes difficult for water to condense and sorb on the membrane at higher temperature. In case of liquid sorption, the water uptake increases with temperature. I don't understand why it should not happen with vapor at constant RH. Therefore, i wanted to clarify whether temperature effect at constant RH has been studied thoroughly or not. The articles that you had mentioned, report water uptake at varying RH for mostly two temperatures (30 and 90 deg C). I am still unable to conclude from their data.
Thanks!
- Badges
- Science topic
- Similar topics
- Physical Sciences
- Materials Science
- Materials Chemistry