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Reference type: Journal
Authors: Latif U, Dickert FL
Article Title: Conductometric Sensors for Monitoring Degradation of Automotive Engine Oil.
Publication date: 2011
Journal: Sensors
Volume: 11
Issue: (9)
Page numbers: 8611-8625.
DOI: 10.3390/s110908611

Abstract: Conductometric sensors have been fabricated by applying imprinted polymers as receptors for monitoring engine oil quality. Titania and silica layers are synthesized via the sol-gel technique and used as recognition materials for acidic components present in used lubricating oil. Thin-film gold electrodes forming an interdigitated structure are used as transducers to measure the conductance of polymer coatings. Optimization of layer composition is carried out by varying the precursors, e.g., dimethylaminopropyltrimethoxysilane (DMAPTMS), and aminopropyl-triethoxysilane (APTES). Characterization of these sensitive materials is performed by testing against oil oxidation products, e.g., carbonic acids. The results depict that imprinted aminopropyltriethoxysilane (APTES) polymer is a promising candidate for detecting the age of used lubricating oil. In the next strategy, polyurethane-nanotubes composite as sensitive material is synthesized, producing appreciable differentiation pattern between fresh and used oils at elevated temperature with enhanced sensitivity.
Template and target information: engine oil, engine oil degradation products
Author keywords: conductometric sensors, engine oil, imprinted polymers, carbon nanotubes, polyurethane


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