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@PHDTHESIS{Vafaei:1017334,
      author       = {Vafaei, Seyedmohammad},
      othercontributors = {Jacobs, Georg and Schmitz, Katharina},
      title        = {{T}ribological performance of bio-based greases with
                      polymer thickener systems},
      school       = {Rheinisch-Westfälische Technische Hochschule Aachen},
      type         = {Dissertation},
      address      = {Aachen},
      publisher    = {RWTH Aachen University},
      reportid     = {RWTH-2025-07321},
      pages        = {1 Online-Ressource : Illustrationen},
      year         = {2025},
      note         = {Veröffentlicht auf dem Publikationsserver der RWTH Aachen
                      University; Dissertation, Rheinisch-Westfälische Technische
                      Hochschule Aachen, 2025},
      abstract     = {Currently, most commercially available lubricating greases
                      are produced from petrochemical materials. Petrochemical
                      lubricants used in machines and systems in various
                      industries get leaked or disposed of into the environment,
                      which imposes significant threats to the ecosystems. Toxic
                      petrochemical materials pollute water, air, and soil, which
                      leads to several diseases and health problems for humans and
                      animals. A promising solution to these threats lies in the
                      transition to bio-based, non-toxic lubricants. A growing
                      interest in scientific research towards synthesizing
                      bio-based lubricants, including lubricating greases, has
                      been observed in recent decades. However, such developed
                      bio-based alternative greases were mostly plant-based and
                      could not compete with their polymeric petrochemical
                      counterparts regarding their performance in rolling element
                      bearings; thus, they were often not integrated into the
                      industrial machines. To produce competitive lubricating
                      greases for application in rolling element bearings, it is
                      essential to consider both development and evaluation
                      process, while considering their correlations. This thesis
                      employs a methodological development of bio-based
                      lubricating greases with different polymer thickener systems
                      and a comprehensive assessment of their tribological
                      performance at the tribometer and component level. It also
                      includes the tribological performance of the bio-based
                      polymeric greases compared to the petrochemical polymeric
                      counterpart. Understanding the correlation between the
                      grease's physicochemical characteristics and tribological
                      performance on different scales elucidates the potential for
                      the design of competitive bio-based greases. Therefore, the
                      correlation of tribological performance with physicochemical
                      parameters in different scales is also covered in this work.
                      The findings of this work facilitate the future development
                      of lubricating greases, specifically bio-based greases, and
                      contribute to the transition toward the integration of
                      sustainable lubricating greases in rolling element bearings
                      across various industry sectors.},
      cin          = {411710},
      ddc          = {620},
      cid          = {$I:(DE-82)411710_20190404$},
      typ          = {PUB:(DE-HGF)11},
      doi          = {10.18154/RWTH-2025-07321},
      url          = {https://publications.rwth-aachen.de/record/1017334},
}