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 language | English |
|---|---|
| Pages (from-to) | 9118-9125 |
| Number of pages | 8 |
| Journal | ACS Applied Materials and Interfaces |
| Volume | 9 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - Mar 15 2017 |
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Keywords
- boundary lubrication
- friction modifier
- heterocyclic
- lubrication additive
- wear
ASJC Scopus subject areas
- Materials Science(all)
Cite this
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 journal › Article
}
TY - JOUR
T1 - Alkyl-Cyclens as Effective Sulfur- and Phosphorus-Free Friction Modifiers for Boundary Lubrication
AU - Desanker, Michael
AU - He, Xingliang
AU - Lu, Jie
AU - Liu, Pinzhi
AU - Pickens, David B.
AU - Delferro, Massimiliano
AU - Marks, Tobin J
AU - Chung, Yip Wah
AU - Wang, Q. Jane
PY - 2017/3/15
Y1 - 2017/3/15
N2 - 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.
AB - 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.
KW - boundary lubrication
KW - friction modifier
KW - heterocyclic
KW - lubrication additive
KW - wear
UR - http://www.scopus.com/inward/record.url?scp=85015404562&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85015404562&partnerID=8YFLogxK
U2 - 10.1021/acsami.6b15608
DO - 10.1021/acsami.6b15608
M3 - Article
AN - SCOPUS:85015404562
VL - 9
SP - 9118
EP - 9125
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
SN - 1944-8244
IS - 10
ER -