Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 208, Issue -, Pages 277-282Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2014.11.044
Keywords
Humidity sensor; Water-resistant polymer; Cross-linking; Polymer electrolyte; Solvothermal
Funding
- Natural Science Foundation Committee (NSFC) [51103053]
- Postdoctoral Science Foundation of China (PSFC) [2011M500608, 2013T60324]
- Ministry of Education of China [20110061120053]
- Changjiang Scholars and Innovativation Research Team in University [IRT13018]
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Defined structure and water-resistance are two important requirements for polymeric humidity sensors. Most of polymer electrolytes applied in humidity sensors do not bear both features at the same time. Herein, a novel method was used to develop stable humidity sensitive polymer electrolytes with defined structures. Nanoporous polymers based on 1,4-divinylbenzene (DVB) and methacrylatoethyl trimethylammonium chloride (DMC) were synthesized by free radical polymerization with a solvothermal route. The cross-linked structure could afford good stability of the polymers even at high humidity levels. The impedance module of the optimized sensor changed more than three orders of magnitude over the whole humidity range, with little humidity hysteresis and rapid response. (C) 2014 Elsevier B.V. All rights reserved.
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