Alkyl-Cyclens as Effective Sulfur- and Phosphorus-Free Friction Modifiers for Boundary Lubrication

Michael Desanker, Xingliang He, Jie Lu, Pinzhi Liu, David B. Pickens, Massimiliano Delferro, Tobin J Marks, Yip Wah Chung, Q. Jane Wang

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Modern automotive engines operate at higher power densities than ever before, driving a need for new lubricant additives capable of reducing friction and wear further than ever before while not poisoning the catalytic converter. Reported in this paper is a new class of molecular friction modifier (FM), represented by 1,4,7,10-tetradodecyl-1,4,7,10-tetraazacyclododecane (1a), designed to employ thermally stable, sulfur- and phosphorus-free alkyl-substituted nitrogen heterocycles with multiple nitrogen centers per molecule. The multiple nitrogen centers enable cooperative binding to a surface which provides strong surface adsorption and lubricant film durability in the boundary lubrication (BL) regime. A 1 wt % loading of the cyclen FM 1a in Group III base oil exhibits strong surface adsorption, leading to excellent reductions in friction (70%) and wear (95%) versus the pure Group III oil across a wide temperature range. The lubricant with the new FM additive also outperforms two commercially available noncyclic amine-based FMs and a fully formulated commercial 5W30 motor oil.

Original languageEnglish
Pages (from-to)9118-9125
Number of pages8
JournalACS Applied Materials and Interfaces
Volume9
Issue number10
DOIs
Publication statusPublished - Mar 15 2017

Fingerprint

Sulfur
Phosphorus
Lubrication
Friction
Lubricants
Oils
Nitrogen
Wear of materials
Catalyst poisoning
Adsorption
Catalytic converters
Amines
Durability
Engines
Molecules
Temperature
cyclen

Keywords

  • boundary lubrication
  • friction modifier
  • heterocyclic
  • lubrication additive
  • wear

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Desanker, M., He, X., Lu, J., Liu, P., Pickens, D. B., Delferro, M., ... Wang, Q. J. (2017). Alkyl-Cyclens as Effective Sulfur- and Phosphorus-Free Friction Modifiers for Boundary Lubrication. ACS Applied Materials and Interfaces, 9(10), 9118-9125. https://doi.org/10.1021/acsami.6b15608

Alkyl-Cyclens as Effective Sulfur- and Phosphorus-Free Friction Modifiers for Boundary Lubrication. / Desanker, Michael; He, Xingliang; Lu, Jie; Liu, Pinzhi; Pickens, David B.; Delferro, Massimiliano; Marks, Tobin J; Chung, Yip Wah; Wang, Q. Jane.

In: ACS Applied Materials and Interfaces, Vol. 9, No. 10, 15.03.2017, p. 9118-9125.

Research output: Contribution to journalArticle

Desanker, M, He, X, Lu, J, Liu, P, Pickens, DB, Delferro, M, Marks, TJ, Chung, YW & Wang, QJ 2017, 'Alkyl-Cyclens as Effective Sulfur- and Phosphorus-Free Friction Modifiers for Boundary Lubrication', ACS Applied Materials and Interfaces, vol. 9, no. 10, pp. 9118-9125. https://doi.org/10.1021/acsami.6b15608
Desanker, Michael ; He, Xingliang ; Lu, Jie ; Liu, Pinzhi ; Pickens, David B. ; Delferro, Massimiliano ; Marks, Tobin J ; Chung, Yip Wah ; Wang, Q. Jane. / Alkyl-Cyclens as Effective Sulfur- and Phosphorus-Free Friction Modifiers for Boundary Lubrication. In: ACS Applied Materials and Interfaces. 2017 ; Vol. 9, No. 10. pp. 9118-9125.
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