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Conductometric sensors for monitoring degradation of automotive engine oil.

Latif U, Dickert FL - Sensors (Basel) (2011)

Bottom Line: 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.

View Article: PubMed Central - PubMed

Affiliation: Department of Analytical Chemistry, University of Vienna, Waehringer Strasse 38, A-1090 Vienna, Austria. usman.latif@univie.ac.at

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.

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Schematic presentation of conductometric sensor and polymer layer covered interdigitated electrodes.
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f1-sensors-11-08611: Schematic presentation of conductometric sensor and polymer layer covered interdigitated electrodes.

Mentions: An interdigital electrode structure is fabricated on a glass substrate via screen printing with gold paste (GGP 2093126 W.C. Heraeus) and subsequently, covered with the sensitive layers. The thickness of the gold electrodes is measured by AFM, which is 171 nm. Interdigital transducers (IDTs) possess nine fingers in one electrode: the finger width is 300 μm, the gap 300 μm, and a length of 7 mm as shown in Figure 1.


Conductometric sensors for monitoring degradation of automotive engine oil.

Latif U, Dickert FL - Sensors (Basel) (2011)

Schematic presentation of conductometric sensor and polymer layer covered interdigitated electrodes.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3231490&req=5

f1-sensors-11-08611: Schematic presentation of conductometric sensor and polymer layer covered interdigitated electrodes.
Mentions: An interdigital electrode structure is fabricated on a glass substrate via screen printing with gold paste (GGP 2093126 W.C. Heraeus) and subsequently, covered with the sensitive layers. The thickness of the gold electrodes is measured by AFM, which is 171 nm. Interdigital transducers (IDTs) possess nine fingers in one electrode: the finger width is 300 μm, the gap 300 μm, and a length of 7 mm as shown in Figure 1.

Bottom Line: 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.

View Article: PubMed Central - PubMed

Affiliation: Department of Analytical Chemistry, University of Vienna, Waehringer Strasse 38, A-1090 Vienna, Austria. usman.latif@univie.ac.at

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.

Show MeSH