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Poly(alkylimidazolium bis(trifluoromethylsulfonyl) imide)-Based Polymerized Ionic Liquids: A Potential  High-Performance Lubricating Grease
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements. Nanjing Tech University, Nanjing, China.ORCID iD: 0000-0001-6137-5349
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.
Nanjing Tech University, Nanjing, China.
Nanjing Tech University, Nanjing, China.
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2019 (English)In: Advanced Materials Interfaces, ISSN 2196-7350, Vol. 6, no 5, article id 1801796Article in journal (Refereed) Published
Abstract [en]

Polymers prepared from ionic liquids are widely called polymerized ionic liquids (PILs). Compared to monocationic and dicationic ILs, PILs have higher molecular weights, charge, and greater intermolecular interactions, which make PILs have a higher possibility to generate better lubricity. PILs of poly‐alkylimidazolium bis(trifluoromethylsulfonyl)imide (PImC6NTf2) is studied herein. Dicationic ILs of 1,1′‐(pentane‐1,5‐diyl)‐bis(3‐butylimidazolium) bis(trifluoromethylsulfonyl)imide (BIm5‐(NTf2)2) is used as additive to decrease the crystallization temperature of PImC6NTf2. Lubricity of PImC6NTf2 and PImC6NTf2+BIm5‐(NTf2)2, as well as BIm5‐(NTf2)2 for comparison is evaluated under severe conditions, i.e., 3.0 to 3.5 GPa and 200 °C. The rheological study suggests that PImC6NTf2 can be classified into grease. Tribological test results show that PImC6NTf2 has much better antiwear property than BIm5‐(NTf2)2, especially at 3.5 GPa. Adding 4% BIm5‐(NTf2)2 to PImC6NTf2 is able to reduce friction under high pressure. At 200 °C, PImC6NTf2 exhibits excellent lubricity. The mixture of 96%PImC6NTf2+4%BIm5‐(NTf2)2 shows even better antiwear property than neat PImC6NTf2 and exhibits the highest friction reducing property among the ILs at 200 °C. It is speculated that the robust strength of PILs and strong adhesion between PILs and solids are key factors in achieving the excellent antiwear property.

Place, publisher, year, edition, pages
John Wiley & Sons, 2019. Vol. 6, no 5, article id 1801796
Keywords [en]
grease, high pressure and high temperature, lubricity, polymerized ionic liquids
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Research subject
Machine Elements
Identifiers
URN: urn:nbn:se:ltu:diva-72623DOI: 10.1002/admi.201801796ISI: 000460657100002OAI: oai:DiVA.org:ltu-72623DiVA, id: diva2:1280468
Note

Validerad;2019;Nivå 2;2019-03-11 (johcin)

Available from: 2019-01-18 Created: 2019-01-18 Last updated: 2019-06-14Bibliographically approved
In thesis
1. Improving the Lubricating Performance of Ionic Liquids for Different Contacts
Open this publication in new window or tab >>Improving the Lubricating Performance of Ionic Liquids for Different Contacts
2019 (English)Doctoral thesis, comprehensive summary (Other academic)
Alternative title[sv]
Förbättra smörjande prestanda av joniska vätskor för olika kontakter
Place, publisher, year, edition, pages
Luleå: Luleå University of Technology, 2019
Series
Doctoral thesis / Luleå University of Technology 1 jan 1997 → …, ISSN 1402-1544
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Research subject
Machine Elements
Identifiers
urn:nbn:se:ltu:diva-73628 (URN)978-91-7790-364-2 (ISBN)978-91-7790-365-9 (ISBN)
Public defence
2019-06-20, E231, Luleå, 09:00 (English)
Opponent
Supervisors
Available from: 2019-04-16 Created: 2019-04-12 Last updated: 2019-06-14Bibliographically approved

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Wu, JianMu, LiwenLarsson, RolandShi, Yijun

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