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Grafting Heteroelement-Rich Groups on Graphene Oxide: Tuning Polarity and Molecular Interaction with Bio-Ionic Liquid for Enhanced Lubrication
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Maskinelement. Intelligent Composites Laboratory, Department of Chemical and Biomolecular Engineering, The University of Akron.
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Maskinelement.ORCID-id: 0000-0001-6085-7880
Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai .
College of Biotechnology and Pharmaceutical Engineering, National Engineering Technique Research Center for Biotechnology, Nanjing Tech University.
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Rekke forfattare: 92017 (engelsk)Inngår i: Journal of Colloid and Interface Science, ISSN 0021-9797, E-ISSN 1095-7103, Vol. 498, s. 47-54Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Two different heteroelement-rich molecules have been successfully grafted on graphene oxide (GO) sheets which were then used as lubricant additives in bio-ionic liquid. The grafting was processed with reactions between GO sheets and synthesized heteroelement-rich molecules (Imidazol-1-yl phosphonic dichloride and 1H-1,2,4-triazol-1-yl phosphonic dichloride, respectively). The modified GO (m-GO) was added into [Choline][Proline] ([CH][P]) bio-ionic liquid, and has been demonstrated effective additive in promoting lubrication. Different characterization techniques have been utilized to study the reaction between GO and the two modifiers. The effect of molecular structure of the modifiers on the rheological and tribological properties of m-GO/[CH][P] lubricants was systematically investigated. Both theoretical calculation and experimental results demonstrated that the introduced heteroelement-rich groups are beneficial to increase the robustness of lubrication film by intensified hydrogen bonding and enhance the lubricant/friction surface adhesion by increased polarity of the m-GO. As a result, the interfacial lubrication could be significantly improved by these newly developed m-GO/[CH][P] lubricants.

sted, utgiver, år, opplag, sider
Elsevier, 2017. Vol. 498, s. 47-54
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URN: urn:nbn:se:ltu:diva-62450DOI: 10.1016/j.jcis.2017.03.044ISI: 000399855600005PubMedID: 28319840Scopus ID: 2-s2.0-85015699247OAI: oai:DiVA.org:ltu-62450DiVA, id: diva2:1081090
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Validerad; 2017; Nivå 2; 2017-03-23 (andbra)

Tilgjengelig fra: 2017-03-13 Laget: 2017-03-13 Sist oppdatert: 2019-02-22bibliografisk kontrollert

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