Multidisciplinary Research Journal

Study of the Phase States of Water Close to Nafion Interface

Bunkin NF1*, Ignatiev PS2, Kozlov VA1, Shkirin AV1, Zakharov SD3 and Zinchenko AA4

1A.M. Prokhorov General Physics Institute, Moscow, Vavilova 38, 119991 Russia           

2
Amphora Labs Co. Ltd, Moscow, 5th Magistralnaya 11, 123557 Russia 

3P.N. Lebedev Physical Institute, Moscow, Leninskiy prospekt 53, 119991 Russia

4Donetsk National University, Shchorsa 46, Donetsk 83050, Ukraine

*Correspondence E-mail: nbunkin@kapella.gpi.ru

Key Words: Nafion, Exclusion Zone, Photonic Crystal, Refractive Index, Modulation Interference Microscopy

Received February 8th, 2013; Accepted March 1st, 2013; Published March 8th, 2013; Available online  March 15th, 2013

doi: 10.14294/WATER.2013.1

Summary

Experimental measurements of electrostatic potential and the bulk concentration of bisulfite anions in water close to Nafion (a proton - exchange membrane) interface have revealed jump - like changes of these characteristics at a distance of approximately 150 µm from the interface. Furthermore, the temperature behavior of the bisulfite anion concentration exhibits a sort of hysteresis loop, which can be regarded as a manifestation of multi-stability in the system. Additionally, it is experimentally shown that in the vicinity of Nafion interface the refractive index of water grows approximately by a factor of 1.1 as compared with the value in bulk water. The obtained results can be interpreted as evidence of the formation of a new phase in water adjacent to Nafion interface.

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