In the present study, lubricating grease was developed with paraffin oil and 12-lithium hydroxy stearate metal soap as a thickening agent. MoS2 nanosheets were synthesized by hydrothermal method and functionalized with 1-octadecanethiol (i.e., MoS2-ODT). The MoS2 and MoS2-ODT nanosheets were dispersed in the grease with different concentrations to evaluate its tribological performance. Tribological results unveiled that the addition of MoS2 nanosheets in grease appreciably reduced the coefficient of friction and mean wear volume of tribo-interfaces as compared with pure grease. Energy dispersive spectroscopy (EDS) spectrum revealed the deposition of MoS2 on the worn surface and confirmed a thin tribo-film which protects steel tribo-pair against wear.

References

References
1.
Dai
,
W.
,
Kheireddin
,
B.
,
Gao
,
H.
, and
Liang
,
H.
,
2016
, “
Roles of Nanoparticles in Oil Lubrication
,”
Tribol. Int.,
102
(
October
), pp.
88
98
.
2.
Sahoo
,
R. R.
, and
Biswas
,
S. K.
,
2014
, “
Effect of Layered MoS2 Nanoparticles on the Frictional Behavior and Microstructure of Lubricating Greases
,”
Tribol. Lett.
,
53
(
1
), pp.
157
171
.
3.
Adhvaryu
,
A.
,
Sung
,
C.
, and
Erhan
,
S. Z.
,
2005
, “
Fatty Acids and Antioxidant Effects on Grease Microstructures
,”
Ind. Crops. Prod.
,
21
(
3
), pp.
285
291
.
4.
Peña-Parás
,
L.
,
Taha-Tijerina
,
J.
,
García
,
A.
,
Maldonado
,
D.
,
Nájera
,
A.
,
Cantú
,
P.
, and
Ortiz
,
D.
,
2015
, “
Thermal Transport and Tribological Properties of Nanogreases for Metal-Mechanic Applications
,”
Wear
,
332
(
May–June
), pp.
1322
1326
.
5.
Ge
,
X.
,
Xia
,
Y.
, and
Cao
,
Z.
,
2015
, “
Tribological Properties and Insulation Effect of Nanometer TiO2 and Nanometer SiO2 as Additives in Grease
,”
Tribol. Int.,
92
(
December
), pp.
454
461
.
6.
Chang
,
H.
,
Lan
,
C. W.
,
Chen
,
C. H.
,
Kao
,
M. J.
, and
Guo
,
J. B.
,
2014
, “
Anti-Wear and Friction Properties of Nanoparticles as Additives in the Lithium Grease
,”
Int. J. Precis. Eng. Manuf.
,
15
(
10
), pp.
2059
2063
.
7.
Chen
,
J.
,
2010
, “
Tribological Properties of Polytetrafluoroethylene, Nano-Titanium Dioxide, and Nano-Silicon Dioxide as Additives in Mixed Oil-Based Titanium Complex Grease
,”
Tribol. Lett.
,
38
(
3
), pp.
217
224
.
8.
Singh
,
J.
,
Kumar
,
D.
, and
Tandon
,
N.
,
2017
, “
Development of Nanocomposite Grease: Microstructure, Flow, and Tribological Studies
,”
ASME J. Tribol.
,
139
(
5
), p.
052001
.
9.
Rawat
,
S. S.
,
Harsha
,
A. P.
, and
Deepak
,
A. P.
,
2018
, “
Tribological Performance of Paraffin Grease With Silica Nanoparticles as an Additive
,”
Appl. Nanosci.,
9
(
3
), pp.
305
315
.
10.
He
,
Q.
,
Li
,
A.
,
Guo
,
Y.
,
Liu
,
S.
,
Zhang
,
Y.
, and
Kong
,
L.
,
2018
, “
Tribological Properties of Nanometer Cerium Oxide as Additives in Lithium Grease
,”
J. Rare Earths
,
36
(
2
), pp.
209
214
.
11.
Gänsheimer
,
J.
, and
Holinski
,
R.
,
1972
, “
A Study of Solid Lubricants in Oils and Greases Under Boundary Conditions
,”
Wear
,
19
(
4
), pp.
439
449
.
12.
Chang
,
H.
,
Kao
,
M. J.
,
Luo
,
J. D.
, and
Lan
,
C. W.
,
2015
, “
Synthesis and Effect of Nanogrease on Tribological Properties
,”
Int. J. Precis. Eng. Manuf.
,
16
(
7
), pp.
1311
1316
.
13.
Wang
,
L.
,
Wang
,
B.
,
Wang
,
X.
, and
Liu
,
W.
,
2007
, “
Tribological Investigation of CaF2 Nanocrystals as Grease Additives
,”
Tribol. Int.
,
40
(
7
), pp.
1179
1185
.
14.
Ji
,
X.
,
Chen
,
Y.
,
Zhao
,
G.
,
Wang
,
X.
, and
Liu
,
W.
,
2011
, “
Tribological Properties of CaCO3 Nanoparticles as an Additive in Lithium Grease
,”
Tribol. Lett.
,
41
(
1
), pp.
113
119
.
15.
Wang
,
L.
,
Zhang
,
M.
,
Wang
,
X.
, and
Liu
,
W.
,
2008
, “
The Preparation of CeF3 Nanocluster Capped With Oleic Acid by Extraction Method and Application to Lithium Grease
,”
Mater. Res. Bull
,
43
(
8–9
), pp.
2220
2227
.
16.
Mohamed
,
A.
,
Osman
,
T. A.
,
Khattab
,
A.
, and
Zaki
,
M.
,
2015
, “
Tribological Behavior of Carbon Nanotubes as an Additive on Lithium Grease
,”
ASME J. Tribol.
,
137
(
1
), p.
011801
.
17.
Fan
,
X.
,
Xia
,
Y.
,
Wang
,
L.
, and
Li
,
W.
,
2014
, “
Multilayer Graphene as a Lubricating Additive in Bentone Grease
,”
Tribol. Lett.
,
55
(
3
), pp.
455
464
.
18.
Akhtar
,
K.
,
Khalid
,
H.
,
Haq
,
I. U.
, and
Malik
,
A.
,
2016
, “
Improvement in Tribological Properties of Lubricating Grease With Quartz-Enriched Rice Husk Ash
,”
Tribol. Int.,
93
(
January
), pp.
58
62
.
19.
Hu
,
K. H.
,
Hu
,
X. G.
,
Xu
,
Y. F.
,
Huang
,
F.
, and
Liu
,
J. S.
,
2010
, “
The Effect of Morphology on the Tribological Properties of MoS2 in Liquid Paraffin
,”
Tribol. Lett.
,
40
(
1
), pp.
155
165
.
20.
Kalin
,
M.
,
Kogovšek
,
J.
, and
Remškar
,
M.
,
2012
, “
Mechanisms and Improvements in the Friction and Wear Behavior Using MoS2 Nanotubes as Potential Oil Additives
,”
Wear
,
280
(
March
), pp.
36
45
.
21.
Kumari
,
S.
,
Gusain
,
R.
,
Kumar
,
N.
, and
Khatri
,
O. P.
,
2016
, “
PEG-Mediated Hydrothermal Synthesis of Hierarchical Microspheres of MoS2 Nanosheets and Their Potential for Lubrication Application
,”
J. Ind. Eng. Chem.,
42
(
October
), pp.
87
94
.
22.
Koshy
,
C. P.
,
Rajendrakumar
,
P. K.
, and
Thottackkad
,
M. V.
,
2015
, “
Evaluation of the Tribological and Thermo-Physical Properties of Coconut Oil Added With MoS2 Nanoparticles at Elevated Temperatures
,”
Wear
,
330
(
May–June
), pp.
288
308
.
23.
Kumari
,
S.
,
Mungse
,
H. P.
,
Gusain
,
R.
,
Kumar
,
N.
,
Sugimura
,
H.
, and
Khatri
,
O. P.
,
2017
, “
Octadecanethiol-Grafted Molybdenum Disulfide Nanosheets as Oil-Dispersible Additive for Reduction of Friction and Wear
,”
FlatChem
,
3
(
June
), pp.
16
25
.
24.
Gan
,
X.
,
Lv
,
R.
,
Wang
,
X.
,
Zhang
,
Z.
,
Fujisawa
,
K.
,
Lei
,
Y.
,
Huang
,
Z. H.
,
Terrones
,
M.
, and
Kang
,
F.
,
2018
, “
Pyrolytic Carbon Supported Alloying Metal Dichalcogenides as Free-Standing Electrodes for Efficient Hydrogen Evolution
,”
Carbon
,
132
(
June
), pp.
512
519
.
25.
Liang
,
T.
,
Sawyer
,
W. G.
,
Perry
,
S. S.
,
Sinnott
,
S. B.
, and
Phillpot
,
S. R.
,
2011
, “
Energetics of Oxidation in MoS2 Nanoparticles by Density Functional Theory
,”
J. Phys. Chem. C
,
115
(
21
), pp.
10606
10616
.
26.
Nagaraju
,
G.
,
Tharamani
,
C. N.
,
Chandrappa
,
G. T.
, and
Livage
,
J.
,
2007
, “
Hydrothermal Synthesis of Amorphous MoS2 Nanofiber Bundles via Acidification of Ammonium Heptamolybdate Tetrahydrate
,”
Nanoscale Res. Lett.
,
2
(
9
), p.
461
.
27.
Finnie
,
K. S.
,
Cassidy
,
D. J.
,
Bartlett
,
J. R.
, and
Woolfrey
,
J. L.
,
2001
, “
IR Spectroscopy of Surface Water and Hydroxyl Species on Nanocrystalline TiO2 Films
,”
Langmuir
,
17
(
3
), pp.
816
820
.
28.
ASTM D1403-10
,
Standard Test Methods for Cone Penetration of Lubricating Grease Using One-Quarter and One-Half Scale Cone Equipment
,
ASTM International
,
West Conshohocken, PA
.
29.
Sánchez
,
R.
,
Franco
,
J. M.
,
Delgado
,
M. A.
,
Valencia
,
C.
, and
Gallegos
,
C.
,
2011
, “
Thermal and Mechanical Characterization of Cellulosic Derivatives-Based Oleogels Potentially Applicable as Bio-Lubricating Greases: Influence of Ethyl Cellulose Molecular Weight
,”
Carbohydr. Polym.
,
83
(
1
), pp.
151
158
.
30.
Gupta
,
R. N.
, and
Harsha
,
A. P.
,
2017
, “
Antiwear and Extreme Pressure Performance of Castor Oil With Nano-Additives
,”
Proc. Inst. Mech. Eng. Part J: J. Eng. Tribol.,
232
(
October
), pp.
1055
1067
.
31.
Rastogi
,
R. B.
,
Maurya
,
J. L.
, and
Jaiswal
,
V.
,
2013
, “
Zero SAPs and Ash Free Antiwear Additives: Schiff Bases of Salicylaldehyde With 1, 2-Phenylenediamine, 1, 4-Phenylenediamine, and 4, 4′-Diaminodiphenylenemethane and Their Synergistic Interactions With Borate Ester
,”
Tribol. Trans.
,
56
(
4
), pp.
592
606
.
32.
Stachowiak
,
G. W.
, and
Batchelor
,
A. W.
,
2001
,
Engineering Tribology
,
Butter-Worth–Heinemann Publication
,
Oxford, UK
.
33.
Gupta
,
R. N.
, and
Harsha
,
A. P.
,
2017
, “
Synthesis, Characterization, and Tribological Studies of Calcium–Copper–Titanate Nanoparticles as a Biolubricant Additive
,”
ASME J. Tribol.
,
139
(
2
), p.
021801
.
34.
Tannous
,
J.
,
Dassenoy
,
F.
,
Lahouij
,
I.
,
Le Mogne
,
T.
,
Vacher
,
B.
,
Bruhács
,
A.
, and
Tremel
,
W.
,
2011
, “
Understanding the Tribochemical Mechanisms of IF-MoS2 Nanoparticles Under Boundary Lubrication
,”
Tribol. Lett.
,
41
(
1
), pp.
55
64
.
35.
Onodera
,
T.
,
Morita
,
Y.
,
Suzuki
,
A.
,
Koyama
,
M.
,
Tsuboi
,
H.
,
Hatakeyama
,
N.
,
Endou
,
A.
,
Takaba
,
H.
,
Kubo
,
M.
,
Dassenoy
,
F.
, and
Minfray
,
C.
,
2009
, “
A Computational Chemistry Study on Friction of h-MoS2. Part I. Mechanism of Single Sheet Lubrication
,”
J. Phys. Chem. B
,
113
(
52
), pp.
16526
16536
.
36.
Cizaire
,
L.
,
Vacher
,
B.
,
Le Mogne
,
T.
,
Martin
,
J. M.
,
Rapoport
,
L.
,
Margolin
,
A.
, and
Tenne
,
R.
,
2002
, “
Mechanisms of Ultra-Low Friction by Hollow Inorganic Fullerene-Like MoS2 Nanoparticles
,”
Surf. Coat. Tech.
,
160
(
2–3
), pp.
282
287
.
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