Bisensitive Hydrogel with Volume Compensation Properties for Force Compensation Sensors

Binder S, Krause AT, Voit B, Gerlach G (2017)

Publication Type: Journal article

Publication year: 2017

Journal

IEEE Sensors Letters IEEE

Book Volume: 1

Article Number: 8114269

Journal Issue: 6

DOI: 10.1109/LSENS.2017.2774922

Abstract

Hydrogel-based sensors using the force compensation method show a strongly decreased dynamic drift and a much shorter response time. The sensor setup using a piezoresistive pressure sensor to measure and control the pressure equilibrium becomes complex since an external force, e.g., caused by compressed air or a second hydrogel, must be applied from the opposite side. In addition, the swelling pressure of the hydrogel can lead to internal damage of the polymer chains when exposed to high force impacts. A particularly tailored bisensitive hydrogel was designed and synthesized to address these problems. It simultaneously fulfills the functions of a transducer (for sensing) and of an actuator (for volume compensation). The force compensation thus occurs internally within one single hydrogel, and an external force is no longer required. In the particular case considered in this article, the hydrogel was designed to be sensitive to salt concentration cNaCl and to temperature v. As a result, it was possible to quasi-statically maintain the volume at a constant value for different values of cNaCl by applying a corresponding temperature v.

Involved external institutions

Technische Universität Dresden DE Germany (DE)

How to cite

APA:

Binder, S., Krause, A.T., Voit, B., & Gerlach, G. (2017). Bisensitive Hydrogel with Volume Compensation Properties for Force Compensation Sensors. IEEE Sensors Letters, 1(6). https://dx.doi.org/10.1109/LSENS.2017.2774922

MLA:

Binder, Simon, et al. "Bisensitive Hydrogel with Volume Compensation Properties for Force Compensation Sensors." IEEE Sensors Letters 1.6 (2017).

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