Chemically induced oscillations in a pH-responsive hydrogel
- 18 March 2002
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Physical Chemistry Chemical Physics
- Vol. 4 (8) , 1367-1369
- https://doi.org/10.1039/b109977a
Abstract
A Landolt pH-oscillator based on a bromate/sulfite/ferrocyanide reaction has been developed with a room temperature period of 20 min and a range of 3.1 ≤ pH ≤ 7.0. This system has been used to drive periodic oscillations in volume in a pH responsive hydrogel. The gel is coupled to the reaction and changes volume by a factor of at least 6. A continuously stirred, constant volume, tank reactor was set-up on an optical microscope and the reaction pH and gel size monitored.Keywords
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