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Journal of Sensors and Sensor Systems An open-access peer-reviewed journal
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Volume 3, issue 2
J. Sens. Sens. Syst., 3, 291-303, 2014
https://doi.org/10.5194/jsss-3-291-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
J. Sens. Sens. Syst., 3, 291-303, 2014
https://doi.org/10.5194/jsss-3-291-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.

Regular research article 17 Nov 2014

Regular research article | 17 Nov 2014

Compensation for the influence of temperature and humidity on oxygen diffusion in a reactive polymer matrix

P. Marek1, J. J. Velasco-Veléz2, T. Doll3, and G. Sadowski1 P. Marek et al.
  • 1TU Dortmund, Laboratory of Thermodynamics, Emil-Figge-Str. 70, 44227 Dortmund, Germany
  • 2University of California, Berkeley, Department of Material Science and Engineering, Berkeley, CA 94720, USA
  • 3BioMaterial Engineering, HNO, Hannover Medical School, Feodor-Lynen Str. 35, Hannover, Germany

Abstract. In a previous work (Marek et al., 2013) a time-monitoring oxygen sensor was proposed. This sensor is based on a diffusion-controlled oxygen reaction of the indicator system methylene blue (MB)/leuco methylene blue (LMB) and riboflavin embedded in a water-loaded poly(vinyl alcohol) (PVA) matrix. It can be used in packaging, sensors, and biotechnology applications. Since the oxygen diffusion coefficient in the PVA matrix strongly depends on temperature and humidity, two different approaches were developed within this work to compensate for these two effects. To compensate for faster oxygen diffusion at higher temperatures, iron particles were added to the PVA matrix, resulting in a novel PVA/iron composite matrix. Adding silicone particles allows compensating the influence of humidity. Both temperature and humidity compensation were modeled using the finite-element method in good accordance with the experimental data. This allows tuning the sensor for application at different conditions of temperature and humidity and therewith in different environments.

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A time-monitoring oxygen sensor based on a diffusion-controlled oxygen reaction of the indicator system methylene blue (MB)/leuco methylene blue (LMB) and riboflavin was embedded in a water-loaded poly(vinyl alcohol) (PVA) matrix. It can be used in packaging, sensors, and biotechnology applications. Since the oxygen diffusion coefficient in the PVA matrix strongly depends on temperature and humidity, two different approaches were developed within this work to compensate for these two effects.
A time-monitoring oxygen sensor based on a diffusion-controlled oxygen reaction of the indicator...
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