Abstract
Abstract. Porous poly(N-isopropylacrylamide) (PNIPAAm) hydrogels with pore diameters in the nanometer and the micrometer range were synthesized using two variations of the surfactant-based template method. We showed that smaller pore diameters lead to faster swelling and deswelling. A graphic representation of a model describing the swelling kinetics explains the assumption that the release and the uptake of water is faster for a larger specific surface area, that is smaller pore diameters. Additionally, the open-porous channel structure benefits the water transport compared to a nonporous PNIPAAm hydrogel. Sensor measurements result in response times between 36 s and 4 min also showing the importance of mechanical stability of porous hydrogels.
Subject
Electrical and Electronic Engineering,Instrumentation
Reference20 articles.
1. Dušek, K. and Patterson, D.: Transition in swollen polymer networks induced by intramolecular condensation, J. Polym Sci. Pol. Phys., 6, 1209–1216, 1968.
2. Erfkamp, J., Guenther, M., and Gerlach, G.: Hydrogel-based piezoresistive sensor for the detection of ethanol, J. Sens. Sens. Syst., 7, 219–226, https://doi.org/10.5194/jsss-7-219-2018, 2018.
3. Franke, D. and Gerlach, G.: Swelling studies of porous and nonporous semi-IPN hydrogels for sensor and actuator applications, Micromachines, 11, 425, https://doi.org/10.3390/mi11040425, 2020.
4. Franke, D., Binder, S., and Gerlach, G.: Performance of fast-responsive, porous crosslinked poly(N-isopropylacrylamide) in a piezoresistive microsensor, IEEE Sens. Lett., 1, 1500904, https://doi.org/10.1109/LSENS.2017.2773626, 2017.
5. Guenther, M. and Gerlach, G.: Hydrogels for chemical sensors, in: Hydrogel sensors and actuators, eds.: Gerlach, G. and Arndt, K.-F., Springer, Berlin, Heidelberg, Germany, 165–195, 2009.
Cited by
4 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献