A water durable resistive humidity sensor based on rigid sulfonated polybenzimidazole and their properties
| Autor: | Myoung-Seon Gong, Kwang-Jin Park |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
02 engineering and technology 01 natural sciences chemistry.chemical_compound Electrical resistivity and conductivity Polymer chemistry Materials Chemistry Imidazole Moiety Electrical and Electronic Engineering Instrumentation Tetramethylammonium Resistive touchscreen 010401 analytical chemistry Metals and Alloys Substrate (chemistry) Epoxy 021001 nanoscience & nanotechnology Condensed Matter Physics Polyelectrolyte 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry Chemical engineering visual_art visual_art.visual_art_medium 0210 nano-technology |
| Zdroj: | Sensors and Actuators B: Chemical. 246:53-60 |
| ISSN: | 0925-4005 |
| DOI: | 10.1016/j.snb.2017.02.074 |
| Popis: | A water-durable, polymeric resistive humidity sensor was designed using rigid sulfonated polybenzimidazole (SPBI) with tetramethylammonium (Me 4 N + ) as the counter cation. The Me 4 N–SPBI structure based on the imidazole group was used to obtain a cross-linkable moiety to attach the humidity-sensitive polyelectrolyte film to an alumina substrate pretreated with an aminosilane coupling agent using an epoxy cross-linker. The SPBI in Me 4 N + structure is derived from 3,3′-diaminobenzidine (DAB), sodium 6,6′-oxybis(3-carboxybenzenesulfonate) (SOCBS) and 4,4′-oxybisbenzoic acid (OBBA), followed by quaternization, which allows for easy fabrication, higher sensitivity and better adhesion between the film and the substrate. The effect that cross-linking and anchoring the Me 4 N–SPBI films had on the humidity-sensing properties and water durability of sensors were investigated. The SPBI films with Me 4 N–DAB/SOCBS/OBBA = 100/100/0 and 100/70/30 exhibited a linear response with a resistivity of 6.11–1.19 kΩ and 7.60 MΩ–2.51 kΩ between 20 and 95% RH, respectively. Consequently, cross-linking and anchoring the film to the substrates with a coupling reagent significantly improves the water durability and stability at a high humidity and high temperature. |
| Databáze: | OpenAIRE |
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