Editing Lubricant (section)

=== Aqueous lubrication ===
Aqueous lubrication is of interest in a number of technological applications. Strongly hydrated [[Polymer brush|brush polymer]]s such as PEG can serve as lubricants at liquid solid interfaces.<ref>{{Cite journal| doi=10.1007/s11249-009-9549-9| title=Macrotribological Studies of Poly(L-lysine)-graft-Poly(ethylene glycol) in Aqueous Glycerol Mixtures| journal=Tribology Letters| volume=37| issue=3| pages=541–552| year=2010| last1=Nalam| first1=Prathima C.| last2=Clasohm| first2=Jarred N.| last3=Mashaghi| first3=Alireza| last4=Spencer| first4=Nicholas D.| hdl=20.500.11850/17055| s2cid=109928127| url=http://doc.rero.ch/record/314245/files/11249_2009_Article_9549.pdf| hdl-access=free| access-date=13 July 2019| archive-date=27 April 2019| archive-url=https://web.archive.org/web/20190427091427/http://doc.rero.ch/record/314245/files/11249_2009_Article_9549.pdf| url-status=live}}</ref> By continuous rapid exchange of bound water with other free water molecules, these polymer films keep the surfaces separated while maintaining a high fluidity at the brush–brush interface at high compressions, thus leading to a very low coefficient of friction.