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      Online lubricant degradation monitoring using contact charging of polymers

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      Author(s)
      Baytekin, Bilge
      Baytekin, H. T.
      Karluk, Azimet Akber
      Ekim, Sunay Dilara
      Date
      2022-05-15
      Source Title
      Applied Surface Science
      Print ISSN
      0169-4332
      Electronic ISSN
      1873-5584
      Publisher
      Elsevier
      Volume
      584
      Pages
      1 - 9
      Language
      English
      Type
      Article
      Item Usage Stats
      11
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      9
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      Abstract
      Lubrication of machine parts is necessary to prevent friction and wear in machine operation. However, oxidation of lubricants upon operation changes their chemical and physical properties and causes lubrication performance to deteriorate. Besides, one liter of wasted/used lubricant oil can contaminate a million liters of water. Current methods for the timely detection of oil deterioration lack practicality. Here we show simple, a triboelectrification-based method for oil degradation monitoring, in which the oxidation can be monitored by the changes in the contact charging (and separation) signals of oil-dipped cellulose and a common polymer tapped to each other. The commercial and base oil samples are oxidized at 100–200 °C for up to 80 h, simultaneously monitored by ATR-FTIR and the triboelectric method. The results show that a 40–90% decrease in the triboelectric open-circuit potentials in the presence of oxidized oil can directly indicate the start of oil oxidation without other accompanying analyses.
      Keywords
      Atomic force microscopy
      Contact electrification
      Lubricants
      Polymer tribology
      Triboelectricity
      Permalink
      http://hdl.handle.net/11693/111271
      Published Version (Please cite this version)
      https://dx.doi.org/10.1016/j.apsusc.2022.152593
      Collections
      • Department of Chemistry 707
      • Institute of Materials Science and Nanotechnology (UNAM) 2258
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