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Sol–Gel‐Coated Quartz Crystal Microbalances for Monitoring Automotive Oil Degradation
Author(s) -
Dickert F. L.,
Greibl W.,
Rohrer A.,
Voigt G.
Publication year - 2001
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/1521-4095(200109)13:17<1327::aid-adma1327>3.0.co;2-3
Subject(s) - quartz crystal microbalance , materials science , degradation (telecommunications) , quartz , ceramic , crystal (programming language) , layer (electronics) , chemical engineering , composite material , organic chemistry , adsorption , computer science , chemistry , telecommunications , engineering , programming language
Detecting the degradation of automotive engine oils is an environmentally important task. The combination of a molecularly imprinted ceramic layer with a mass‐sensitive device (e.g., a quartz crystal microbalance, QCM) is shown to provide a cheap and easy‐to‐use method of continuously checking the aging of oil in a car engine. In the approach presented, carboxylic acids formed by oxidation processes are extracted by hydrogen bonding to basic interaction sites on sol–gel layers on a QCM, which leads to a frequency response of the QCM.