Hydrogel-based piezoresistive sensor for the detection of ethanol
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Published:2018-04-04
Issue:1
Volume:7
Page:219-226
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ISSN:2194-878X
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Container-title:Journal of Sensors and Sensor Systems
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language:en
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Short-container-title:J. Sens. Sens. Syst.
Author:
Erfkamp Jan, Guenther MargaritaORCID, Gerlach Gerald
Abstract
Abstract. This article describes a low-cost sensor for the detection of ethanol in
alcoholic beverages, which combines alcohol-sensitive hydrogels based on
acrylamide and bisacrylamide and piezoresistive sensors. For reproducible
measurements, the reversible swelling and deswelling of the hydrogel were
shown via microscopy. The response time of the sensor depends on the swelling
kinetics of the hydrogel. The selectivity of the hydrogel was tested in
different alcohols. In order to understand the influence of monomer and
crosslinker content on the swelling degree and on the sensitivity of the
hydrogels, gels with variable concentrations of acrylamide and bisacrylamide
were synthesized and characterized in different aqueous solutions with
alcohol contents. The first measurements of such hydrogel-based
piezoresistive ethanol sensors demonstrated a high sensitivity and a short
response time over several measuring cycles.
Funder
Deutsche Forschungsgemeinschaft
Publisher
Copernicus GmbH
Subject
Electrical and Electronic Engineering,Instrumentation
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