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Qu J, Barnhill WC, Luo H, et al. Synergistic effects between phosphonium-alkylphosphate ionic liquids and zinc dialkyldithiophosphate (ZDDP) as lubricant additives. Adv Mater. 2015;27(32):4767-74doi: 10.1002/adma.201502037.
Qu, J., Barnhill, W. C., Luo, H., Meyer, H. M., Leonard, D. N., Landauer, A. K., Kheireddin, B., Gao, H., Papke, B. L., & Dai, S. (2015). Synergistic effects between phosphonium-alkylphosphate ionic liquids and zinc dialkyldithiophosphate (ZDDP) as lubricant additives. Advanced materials (Deerfield Beach, Fla.), 27(32), 4767-74. https://doi.org/10.1002/adma.201502037
Qu, Jun, et al. "Synergistic effects between phosphonium-alkylphosphate ionic liquids and zinc dialkyldithiophosphate (ZDDP) as lubricant additives." Advanced materials (Deerfield Beach, Fla.) vol. 27,32 (2015): 4767-74. doi: https://doi.org/10.1002/adma.201502037
Qu J, Barnhill WC, Luo H, Meyer HM, Leonard DN, Landauer AK, Kheireddin B, Gao H, Papke BL, Dai S. Synergistic effects between phosphonium-alkylphosphate ionic liquids and zinc dialkyldithiophosphate (ZDDP) as lubricant additives. Adv Mater. 2015 Aug 26;27(32):4767-74. doi: 10.1002/adma.201502037. Epub 2015 Jul 14. PMID: 26173561.
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Adv Mater. 2015 Aug 26;27(32):4767-74. doi: 10.1002/adma.201502037. Epub 2015 Jul 14.

Synergistic effects between phosphonium-alkylphosphate ionic liquids and zinc dialkyldithiophosphate (ZDDP) as lubricant additives.

Advanced materials (Deerfield Beach, Fla.)

Jun Qu, William C Barnhill, Huimin Luo, Harry M Meyer, Donovan N Leonard, Alexander K Landauer, Bassem Kheireddin, Hong Gao, Brian L Papke, Sheng Dai

Affiliations

  1. Materials Science and Technology Division, Oak Ridge National Laboratory, P. O. Box 2008, MS-6063, Oak Ridge, TN, 37831-6063, USA.
  2. Energy and Transportation Science Division, Oak Ridge National Laboratory, P. O. Box 2008, MS-6181, Oak Ridge, TN, 37831-6181, USA.
  3. Technology Center Houston, Shell Global Solutions, Houston, TX, 77082-3101, USA.
  4. Chemical Sciences Division, Oak Ridge National Laboratory, P. O. Box 2008, MS-6201, Oak Ridge, TN, 37831-6201, USA.

PMID: 26173561 DOI: 10.1002/adma.201502037

Abstract

Unique synergistic effects between phosphonium-alkylphosphate ionic liquids (ILs) and zinc dialkyldithiophosphate (ZDDP) are discovered when used together as lubricant additives, resulting in significant friction and wear reduction along with distinct tribofilm composition and mechanical properties. The synergism is attributed to the remarkably 30-70× higher-than-nominal concentrations of hypothetical new compounds (via anion exchange between IL and ZDDP) on the fluid surface/interface.

© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Keywords: ZDDP; friction and wear reductions; ionic liquids; lubricant additives; synergistic effects

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