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Permanent link (DOI): https://doi.org/10.7939/R3H708D51

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Poly(N-isopropylacrylamide) microgel-based thin film actuators for humidity sensing Open Access

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Author or creator
Islam, Molla R.
Serpe, Michael J.
Additional contributors
Subject/Keyword
Linear-Chains
Protein-Concentration
Sensors
Water
Etalons
Acid
pH
Phase-Transition
Type of item
Journal Article (Published)
Language
English
Place
Time
Description
In this submission we fabricated a humidity-responsive polymer-based actuator by layering negatively charged poly(N-isopropylacrylamide)-co-acrylic acid microgels and positively charged poly(diallyldimethyl ammonium chloride) on top of a flexible plastic substrate. We show that the extent of the actuation (bending) was dependent on the atmospheric humidity. This property was used to detect atmospheric humidity by hanging weights from the actuator, which were rested on the pan of a top loading balance. This was done in such a way that the amount of the mass resting on the balance depended on the extent of actuator bending, which could then be related to humidity. We found the mass read by the balance to be linearly dependent on the atmospheric humidity in the range of 0–50% humidity, and the devices could be used to detect 0.02% humidity changes. These experiments show that the actuation of the devices can be used for sensing applications, in this case humidity, but will be used in the future to detect various atmospheric gases and other vapors.
Date created
2014
DOI
doi:10.7939/R3H708D51
License information
© The Royal Society of Chemistry 2014 distributed under an Attribution-NonCommercial 3.0 Unported Licence
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Citation for previous publication
Islam, M., and Serpe, M. (2014). Poly(N-isopropylacrylamide) microgel-based thin film actuators for humidity sensing. RSC Advances, 4(60), 31937-31940.
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File title: Poly(N-isopropylacrylamide) microgel-based thin film actuators for humidity sensing
File author: Molla R. Islam
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