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Thematische Bibliographien / Liquid superlubricity / Zeitschriftenartikel

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Zeitschriftenartikel zum Thema „Liquid superlubricity“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 29. Juli 2025

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1

Zeng, Qunfeng, and Wenling Zhang. "A Systematic Review of the Recent Advances in Superlubricity Research." Coatings 13, no. 12 (2023): 1989. http://dx.doi.org/10.3390/coatings13121989.

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Friction and the wear caused by friction will not only lead to energy dissipation, but will also cause damage to the function of mechanical parts, affecting the precision and lifespan of mechanical devices. Superlubricity as an ideal state of zero friction has become a hot research topic in recent years. There have been many reviews on the concept, origin, and research progress of superlubricity, but, among them, there are more presentations on the research status of solid superlubricity and liquid superlubricity; however, the theoretical summarization of solid–liquid combined superlubricity a

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2

Li, Jinjin, Chenhui Zhang, Mingming Deng, and Jianbin Luo. "Investigation of the difference in liquid superlubricity between water- and oil-based lubricants." RSC Advances 5, no. 78 (2015): 63827–33. http://dx.doi.org/10.1039/c5ra10834a.

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The difference in superlubricity behavior between water- and oil-based lubricants is investigated and the liquid superlubricity region dependent on pressure and the pressure–viscosity coefficient is established.

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3

Gao, Xinlei, Yuwei Cheng, Miaomiao Shi, Hao Chen, Li Wu, and Tingting Wang. "Design of Superlubricity System Using Si3N4/Polyimide as the Friction Pair and Nematic Liquid Crystals as the Lubricant." Polymers 15, no. 18 (2023): 3693. http://dx.doi.org/10.3390/polym15183693.

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Polyimide (PI) is a high-performance engineering plastic used as a bearing material. A superlubricity system using Si3N4/PI as the friction pair and nematic liquid crystals (LCs) as the lubricant was designed. The superlubricity performance was studied by simulating the start-stop condition of the machine, and it was found that the superlubricity system had good reproducibility and stability. In the superlubricity system, friction aligned with the PI molecules, and this alignment was less relevant compared to which substance was rubbing on the PI. Oriented PI molecules induced LC molecule alig

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4

Ge, Xiangyu, Zhiyuan Chai, Qiuyu Shi, Yanfei Liu, Jiawei Tang, and Wenzhong Wang. "Liquid Superlubricity Enabled by the Synergy Effect of Graphene Oxide and Lithium Salts." Materials 15, no. 10 (2022): 3546. http://dx.doi.org/10.3390/ma15103546.

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In this study, graphene oxide (GO) nanoflakes and lithium salt (LiPF6) were utilized as lubrication additives in ether bond−containing dihydric alcohol aqueous solutions (DA(aq)) to improve lubrication performances. The apparent friction reduction and superlubricity were realized at the Si3N4/sapphire interface. The conditions and laws for superlubricity realization have been concluded. The underlying mechanism was the synergy effect of GO and LiPF6. It was proven that a GO adsorption layer was formed at the interface, which caused the shearing interface to transfer from solid asperities to GO

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5

Du, Changhe, Tongtong Yu, Zishuai Wu, et al. "Achieving macroscale superlubricity with ultra-short running-in period by using polyethylene glycol-tannic acid complex green lubricant." Friction 11, no. 5 (2023): 748–62. http://dx.doi.org/10.1007/s40544-022-0660-3.

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AbstractSuperlubricating materials can greatly reduce the energy consumed and economic losses by unnecessary friction. However, a long pre-running-in period is indispensable for achieving superlubricity; this leads to severe wear on the surface of friction pairs and has become one of the important factors in the wear of superlubricating materials. In this study, a polyethylene glycol-tannic acid complex green liquid lubricant (PEG10000-TA) was designed to achieve macroscale superlubricity with an ultrashort running-in period of 9 s under a contact pressure of up to 410 MPa, and the wear rate w

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6

Li, Jinjin, Chenhui Zhang, and Jianbin Luo. "Effect of pH on the liquid superlubricity between Si3N4 and glass achieved with phosphoric acid." RSC Adv. 4, no. 86 (2014): 45735–41. http://dx.doi.org/10.1039/c4ra04970e.

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7

Gong, Penghui, Yishen Qu, Wei Wang, Fanfan Lv, and Jie Jin. "Macroscale Superlubricity of Black Phosphorus Quantum Dots." Lubricants 10, no. 7 (2022): 158. http://dx.doi.org/10.3390/lubricants10070158.

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In the present work, Black Phosphorus Quantum Dots (BPQDs) were synthesized via sonication-assisted liquid-phase exfoliation. The average size of the BPQDs was 3.3 ± 0.85 nm. The BPQDs exhibited excellent dispersion stability in ultrapure water. Macroscale superlubricity was realized with the unmodified BPQDs on rough Si3N4/SiO2 interfaces. A minimum coefficient of friction (COF) of 0.0022 was achieved at the concentration of 0.015 wt%. In addition, the glycerol was introduced to promote the stability of the superlubricity state. The COF of the BPQDs-Glycerol aqueous solution (BGaq) was 83.75%

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8

Xiao, Chen, Jinjin Li, Lei Chen, et al. "Speed dependence of liquid superlubricity stability with H3PO4 solution." RSC Adv. 7, no. 78 (2017): 49337–43. http://dx.doi.org/10.1039/c7ra09217b.

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9

Xiao, Chen, Jinjin Li, Jian Gong, et al. "Gradual degeneration of liquid superlubricity: Transition from superlubricity to ordinary lubrication, and lubrication failure." Tribology International 130 (February 2019): 352–58. http://dx.doi.org/10.1016/j.triboint.2018.10.008.

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10

Smith, Alexander M., James E. Hallett, and Susan Perkin. "Solidification and superlubricity with molecular alkane films." Proceedings of the National Academy of Sciences 116, no. 51 (2019): 25418–23. http://dx.doi.org/10.1073/pnas.1910599116.

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Hydrocarbon films confined between smooth mica surfaces have long provided an experimental playground for model studies of structure and dynamics of confined liquids. However, fundamental questions regarding the phase behavior and shear properties in this simple system remain unsolved. With ultrasensitive resolution in film thickness and shear stress, and control over the crystallographic alignment of the confining surfaces, we here investigate the shear forces transmitted across nanoscale films of dodecane down to a single molecular layer. We resolve the conditions under which liquid–solid ph

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11

Ma, Qiang, Tao He, Arman Mohammad Khan, Q. Wang, and Yip-Wah Chung. "Achieving macroscale liquid superlubricity using glycerol aqueous solutions." Tribology International 160 (August 2021): 107006. http://dx.doi.org/10.1016/j.triboint.2021.107006.

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12

Ma, Wei, Zhenbin Gong, Kaixiong Gao, Li Qiang, Junyan Zhang, and Shurong Yu. "Superlubricity achieved by carbon quantum dots in ionic liquid." Materials Letters 195 (May 2017): 220–23. http://dx.doi.org/10.1016/j.matlet.2017.02.135.

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13

Liu, Pengxiao, Yuhong Liu, Ye Yang, Zhe Chen, Jinjin Li, and Jianbin Luo. "Mechanism of Biological Liquid Superlubricity of Brasenia schreberi Mucilage." Langmuir 30, no. 13 (2014): 3811–16. http://dx.doi.org/10.1021/la500193n.

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14

Tang, Huajie, Xinchun Chen, Wenli Deng, and Jianbin Luo. "Comprehensive review: Advances and critical mechanisms in liquid superlubricity." Advances in Colloid and Interface Science 344 (October 2025): 103585. https://doi.org/10.1016/j.cis.2025.103585.

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15

Ma, Qiang, Shijian Wang, and Guangneng Dong. "Macroscale liquid superlubricity achieved with mixtures of fructose and diols." Wear 484-485 (November 2021): 204037. http://dx.doi.org/10.1016/j.wear.2021.204037.

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16

Wang, Hongdong, and Yuhong Liu. "Superlubricity achieved with two-dimensional nano-additives to liquid lubricants." Friction 8, no. 6 (2020): 1007–24. http://dx.doi.org/10.1007/s40544-020-0410-3.

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17

Liang, Hongyu, Hongfei Li, Cheng Yang, et al. "Exploring viscosity metrics for hydrogen-bond dominated liquid superlubricity using ionic liquid analogue models." Colloids and Surfaces A: Physicochemical and Engineering Aspects 715 (June 2025): 136614. https://doi.org/10.1016/j.colsurfa.2025.136614.

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18

Castellanos-Leal, Edgar Leonardo, Angel Osuna-Zatarain, and Alejandra Garcia-Garcia. "Frictional Properties of Two-Dimensional Nanomaterials as an Additive in Liquid Lubricants: Current Challenges and Potential Research Topics." Lubricants 11, no. 3 (2023): 137. http://dx.doi.org/10.3390/lubricants11030137.

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This paper reports on the trend of studying and applying two-dimensional materials in tribology. Two-dimensional materials have improved the ability of lubricants when used as additives to reduce wear between surfaces through the formation of protective layers by sliding on metal surfaces. The morphology and chemical nature of 2D materials are among the important factors that influence their dispersion in the lubricant medium and determine the final performance of the lubricant for various applications. The mentioned materials in this work are h-BN, graphene, graphene oxide, and MoS2 as part o

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19

Wen, Xiangli, Pengpeng Bai, Yuanzhe Li, et al. "Effects of Abrasive Particles on Liquid Superlubricity and Mechanisms for Their Removal." Langmuir 37, no. 12 (2021): 3628–36. http://dx.doi.org/10.1021/acs.langmuir.0c03607.

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20

Gao, Yuan, Liran Ma, Yong Liang, Bohong Li, and Jianbin Luo. "Water molecules on the liquid superlubricity interfaces achieved by phosphoric acid solution." Biosurface and Biotribology 4, no. 3 (2018): 94–98. http://dx.doi.org/10.1049/bsbt.2018.0021.

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21

Ge, Xiangyu, Jinjin Li, Chenhui Zhang, and Jianbin Luo. "Liquid Superlubricity of Polyethylene Glycol Aqueous Solution Achieved with Boric Acid Additive." Langmuir 34, no. 12 (2018): 3578–87. http://dx.doi.org/10.1021/acs.langmuir.7b04113.

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22

Li, Jinjin, Chenhui Zhang, Peng Cheng, Xinchun Chen, Weiqi Wang, and Jianbin Luo. "AFM Studies on Liquid Superlubricity between Silica Surfaces Achieved with Surfactant Micelles." Langmuir 32, no. 22 (2016): 5593–99. http://dx.doi.org/10.1021/acs.langmuir.6b01237.

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23

Schreiber, P. J., and J. Schneider. "Liquid superlubricity obtained for self-mated silicon carbide in nonaqueous low-viscosity fluid." Tribology International 134 (June 2019): 7–14. http://dx.doi.org/10.1016/j.triboint.2019.01.031.

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24

Ge, Xiangyu, Jinjin Li, Chenhui Zhang, Zhongnan Wang, and Jianbin Luo. "Superlubricity of 1-Ethyl-3-methylimidazolium trifluoromethanesulfonate Ionic Liquid Induced by Tribochemical Reactions." Langmuir 34, no. 18 (2018): 5245–52. http://dx.doi.org/10.1021/acs.langmuir.8b00867.

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25

Jiang, Yuanyuan, Chen Xiao, Lei Chen, et al. "Temporary or permanent liquid superlubricity failure depending on shear-induced evolution of surface topography." Tribology International 161 (September 2021): 107076. http://dx.doi.org/10.1016/j.triboint.2021.107076.

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26

Hua, Jing, Marcus Björling, Roland Larsson, and Yijun Shi. "Controllable superlubricity achieved with mixtures of green ionic liquid and glycerol aqueous solution via humidity." Journal of Molecular Liquids 345 (January 2022): 117860. http://dx.doi.org/10.1016/j.molliq.2021.117860.

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27

Li, Hua, Ross J. Wood, Mark W. Rutland, and Rob Atkin. "An ionic liquid lubricant enables superlubricity to be “switched on” in situ using an electrical potential." Chemical Communications 50, no. 33 (2014): 4368. http://dx.doi.org/10.1039/c4cc00979g.

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28

Ge, Xiangyu, Jinjin Li, Hongdong Wang, Chenhui Zhang, Yuhong Liu, and Jianbin Luo. "Macroscale superlubricity under extreme pressure enabled by the combination of graphene-oxide nanosheets with ionic liquid." Carbon 151 (October 2019): 76–83. http://dx.doi.org/10.1016/j.carbon.2019.05.070.

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29

Gao, Qiulong, Jinxia Hu, Dong Pei, Zhangpeng Li, Jinqing Wang, and Shengrong Yang. "Design and synthesis of boric acid-based deep eutectic solvents for green liquid superlubricity and bio-lubrication applications." Next Materials 8 (July 2025): 100572. https://doi.org/10.1016/j.nxmate.2025.100572.

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30

Goti, Edoardo, Andrea Mura, Haozhe Wang, Xiang Ji, and Jing Kong. "Comparison of the Tribological Behaviour of Various Graphene Nano-Coatings as a Solid Lubricant for Copper." Applied Sciences 13, no. 14 (2023): 8540. http://dx.doi.org/10.3390/app13148540.

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Among the amazing properties of graphene, superlubricity is one of the most promising properties. This property can be used in industrial field components to reduce friction without using liquid lubricants, and therefore, improve machines’ efficiency and reliability with low environmental impact thanks to the elimination of oil or grease lubricants. In this paper, copper alloy samples for electrical purposes were coated with graphene by four different deposition processes. The investigated synthesis processes are direct grown graphene on bulk Cu, transferred graphene, and self-assembled graphe

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31

Zhang, Yunxiao, Hua Li, Jianan Wang, Debbie S. Silvester, Gregory G. Warr, and Rob Atkin. "Potential-dependent superlubricity of stainless steel and Au(1 1 1) using a water-in-surface-active ionic liquid mixture." Journal of Colloid and Interface Science 678 (January 2025): 355–64. http://dx.doi.org/10.1016/j.jcis.2024.08.187.

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32

Gu, Yanqi, Shuang Yi, Qiang Xu, et al. "Terahertz time-domain spectroscopy of nanoadditive macroscale superlubricity: Quantitative hydration investigation and deeper insight into the solid-liquid synergistic lubrication." Tribology International 195 (July 2024): 109634. http://dx.doi.org/10.1016/j.triboint.2024.109634.

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33

Chen, Junzhao, Yu Zhao, Ruirui Wang, and Pengfei Wang. "Super-Low Friction Electrification Achieved on Polytetrafluoroethylene Films-Based Triboelectric Nanogenerators Lubricated by Graphene-Doped Silicone Oil." Micromachines 14, no. 9 (2023): 1776. http://dx.doi.org/10.3390/mi14091776.

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The novel proposal of Wang’s triboelectric nanogenerator (TENG) has inspired extensive efforts to explore energy harvesting devices from the living environment for the upcoming low-carbon society. The inevitable friction and wear problems of the tribolayer materials become one of the biggest obstacles for attaining high-performance TENGs. To achieve super-low friction electrification of the TENGs, the tribological and electrical behaviors of the sliding-mode TENGs based on polytetrafluoroethylene (PTFE) films and metallic balls under both dry friction and liquid lubrication conditions were inv

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34

Qi, Wei, Lei Chen, Hui Li, Lieming Tang, and Zhiliang Xu. "Solid–Liquid Composite Lubrication (SLCL) Based on Diamond-Like Carbon (DLC) Coatings and Lubricating Oils: Properties and Challenges." Coatings 14, no. 12 (2024): 1475. http://dx.doi.org/10.3390/coatings14121475.

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In the field of industrial lubrication, solid–liquid composite lubrication (SLCL) techniques based on diamond-like carbon (DLC) coatings and lubricating oils are emerging recently, which may be applied in many fields in the near future, especially automotive industries. The tribological behaviors of SLCL systems depend strongly on the compatibility between DLC coatings and oils. This review describes the advantages of SLCL techniques by pointing out the synergistic effects between DLC coatings and lubricating oils. Then the main factors determining the tribological performance of SLCL systems

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35

Zheng, Qingkai, Muhammad Chhattal, Changning Bai, et al. "Superlubricity of PTFE triggered by green ionic liquids." Applied Surface Science 614 (March 2023): 156241. http://dx.doi.org/10.1016/j.apsusc.2022.156241.

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36

Ge, Xiangyu, Xiaodong Wu, Qiuyu Shi, Yanfei Liu, and He Liang. "Influence of Electrical Stimulation on the Friction Performance of LiPF6-Based Ionic Liquids." Lubricants 12, no. 5 (2024): 167. http://dx.doi.org/10.3390/lubricants12050167.

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This work studied the influence of the voltage parameters on the friction and superlubricity performances of LiPF6-based ionic liquids (ILs). The results show that the voltage direction and magnitude greatly affected the friction performances of ILs and that macroscale superlubricity can be achieved with a stimulation of −0.1 V. The surface analysis and experiment results indicate that the voltage magnitude influences the coefficient of friction (COF) by determining the types of substances in the tribochemical film formed on the ball, while the voltage direction influences the COF by affecting

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37

Zhang, Yunxiao, Mark W. Rutland, Jiangshui Luo, Rob Atkin, and Hua Li. "Potential-Dependent Superlubricity of Ionic Liquids on a Graphite Surface." Journal of Physical Chemistry C 125, no. 7 (2021): 3940–47. http://dx.doi.org/10.1021/acs.jpcc.0c10804.

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38

Wojciechowski, Ł., K. J. Kubiak, S. Boncel, et al. "Towards the superlubricity of polymer–steel interfaces with ionic liquids and carbon nanotubes." Tribology International 191 (March 2024): 109203. http://dx.doi.org/10.1016/j.triboint.2023.109203.

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39

Ge, Xiangyu, Jinjin Li, Chenhui Zhang, Yuhong Liu, and Jianbin Luo. "Superlubricity and Antiwear Properties of In Situ-Formed Ionic Liquids at Ceramic Interfaces Induced by Tribochemical Reactions." ACS Applied Materials & Interfaces 11, no. 6 (2019): 6568–74. http://dx.doi.org/10.1021/acsami.8b21059.

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40

Han, Tianyi, Shuowen Zhang, and Chenhui Zhang. "Unlocking the secrets behind liquid superlubricity: A state-of-the-art review on phenomena and mechanisms." Friction, March 22, 2022. http://dx.doi.org/10.1007/s40544-021-0586-1.

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AbstractSuperlubricity, the state of ultralow friction between two sliding surfaces, has become a frontier subject in tribology. Here, a state-of-the-art review of the phenomena and mechanisms of liquid superlubricity are presented based on our ten-year research, to unlock the secrets behind liquid superlubricity, a major approach to achieve superlubricity. An overview of the discovery of liquid superlubricity materials is presented from five different categories, including water and acid-based solutions, hydrated materials, ionic liquids (ILs), two-dimensional (2D) materials as lubricant addi

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41

Yi, Shuang, Yitong Guo, Jinjin Li, Yuxin Zhang, Aiguo Zhou, and Jianbin Luo. "Two-dimensional molybdenum carbide (MXene) as an efficient nanoadditive for achieving superlubricity under ultrahigh pressure." Friction, April 12, 2022. http://dx.doi.org/10.1007/s40544-022-0597-6.

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AbstractIn this study, a robust macroscale liquid superlubricity with a coefficient of friction of 0.004 was achieved by introducing molybdenum carbide (Mo2CTx) MXene nanoparticles as lubricating additives in a lithium hexafluorophosphate-based ionic liquid at Si3N4—sapphire interfaces. The maximal contact pressure in the superlubricity state could reach 1.42 GPa, which far exceeds the limit of the superlubricity regime in previous studies. The results indicate that a composite tribofilm (mainly containing molybdenum oxide and phosphorus oxide) that formed at the interface by a tribochemical r

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42

Zheng, Zhiwen, Xiaolong Liu, Hongxiang Yu, Haijie Chen, Dapeng Feng, and Dan Qiao. "Insight into macroscale superlubricity of polyol aqueous solution induced by protic ionic liquid." Friction, April 12, 2022. http://dx.doi.org/10.1007/s40544-021-0563-8.

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AbstractCurrently, macroscale liquid superlubricity remains limited to low applied loads and typical ceramic friction pairs. In this study, a robust macroscale superlubricity with a coefficient of friction (COF) of approximately 0.006 is realized at the bearing steel interface induced by protic ionic liquids (ILs) in propylene glycol aqueous solution, and the lubrication system exhibits excellent anti-corrosion properties. Results show that superlubricity can be achieved by employing ILs with longer alkyl chains over a wide load (< 350 N) and speed (> 700 r/min) range. By systematically

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43

Wu, Hongxing, Junqin Shi, Hang Li, et al. "Versatile Superlubricity via Boronizing on Engineering Alloys: Insights into In Situ Passivation Mechanism." Advanced Materials, May 15, 2025. https://doi.org/10.1002/adma.202504124.

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AbstractSuperlubricity with a friction coefficient <0.01 holds great promise for reducing energy consumption and global CO2 emissions. However, current numerous innovative superlubricity techniques have persisted in specific materials, inert atmosphere or nano/micro‐scale conditions. Here, a versatile and universal superlubricity strategy is demonstrated for common engineering alloys under atmospheric environment, and emphasize an innovative superlubricity design principle through surface passivation. Such superlubricity behavior is achieved by employing electrochemical boronizing surface t

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44

Zheng, Zhiwen, Xiaolong Liu, Guowei Huang, et al. "Macroscale superlubricity achieved via hydroxylated hexagonal boron nitride nanosheets with ionic liquid at steel/steel interface." Friction, December 4, 2021. http://dx.doi.org/10.1007/s40544-021-0545-x.

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AbstractMacroscale superlubricity is a prospective strategy in modern tribology to dramatically reduce friction and wear of mechanical equipment; however, it is mainly studied for point-to-surface contact or special friction pairs in experiments. In this study, a robust macroscale superlubricity for point-to-point contact on a steel interface was achieved for the first time by using hydroxylated modified boron nitride nanosheets with proton-type ionic liquids (ILs) as additives in ethylene glycol aqueous (EGaq). The detailed superlubricity process and mechanism were revealed by theoretical cal

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45

Ren, Xiaoyong, Xiao Yang, Guoxin Xie, et al. "Superlubricity under ultrahigh contact pressure enabled by partially oxidized black phosphorus nanosheets." npj 2D Materials and Applications 5, no. 1 (2021). http://dx.doi.org/10.1038/s41699-021-00225-0.

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AbstractSuperlubricity has recently raised an increasing interest owing to its great potential in energy saving and environmental benefits. Yet how to obtain stable superlubricity under an ultrahigh contact pressure (>1 GPa) still remains a challenge. Here, we demonstrate that robust liquid superlubricity can be realized even under a contact pressure of 1193 MPa by lubrication with partially oxidized black phosphorus (oBP) nanosheets. The analysis indicates that the oBP nanosheets that absorb large amounts of water molecules are retained at the friction interface and transform the friction

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46

Ge, Xiangyu, Zhiyuan Chai, Qiuyu Shi, et al. "Functionalized graphene-oxide nanosheets with amino groups facilitate macroscale superlubricity." Friction, April 25, 2022. http://dx.doi.org/10.1007/s40544-021-0583-4.

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AbstractGraphene-oxide (GO) has been recognized as an excellent lubrication material owing to its two-dimensional structure and weak interlayer interactions. However, the functional groups of GO that can contribute to anti-friction, anti-wear, and superlubricity are yet to be elucidated. Hence, further improvement in GO-family materials in tribology and superlubricity fields is impeded. In this study, macroscale superlubricity with a coefficient of friction of less than 0.01 is achieved by exploiting the high adhesive force between amino groups within aminated GO (GO-NH2) nanosheets and SiO2.

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Ge, Xiangyu, Zhiyuan Chai, Qiuyu Shi, et al. "Functionalized graphene-oxide nanosheets with amino groups facilitate macroscale superlubricity." Friction, April 25, 2022. http://dx.doi.org/10.1007/s40544-021-0583-4.

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AbstractGraphene-oxide (GO) has been recognized as an excellent lubrication material owing to its two-dimensional structure and weak interlayer interactions. However, the functional groups of GO that can contribute to anti-friction, anti-wear, and superlubricity are yet to be elucidated. Hence, further improvement in GO-family materials in tribology and superlubricity fields is impeded. In this study, macroscale superlubricity with a coefficient of friction of less than 0.01 is achieved by exploiting the high adhesive force between amino groups within aminated GO (GO-NH2) nanosheets and SiO2.

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Hofmann, Stefan, Jingyu Hou, Thomas Lohner, and Karsten Stahl. "Elastohydrodynamic Lubrication Mechanisms of Aqueous Polyethylene Glycols." Tribology Letters 73, no. 2 (2025). https://doi.org/10.1007/s11249-025-01962-9.

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Abstract Water-soluble polyalkylene glycols have become a growing subject of research to achieve liquid superlubricity in elastohydrodynamically lubricated contacts. While the influence of various factors, including water content and viscosity, has been extensively studied, the underlying mechanisms responsible for liquid superlubricity under elastohydrodynamic lubrication remain poorly understood. In this study, aqueous polyethylene glycols of varying average chain length with the same viscosity but different water content or average chain length distribution are examined in relation to elast

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Ayyagari, Aditya, Kazi Istiaque Alam, Diana Berman, and Ali Erdemir. "Progress in Superlubricity Across Different Media and Material Systems—A Review." Frontiers in Mechanical Engineering 8 (August 12, 2022). http://dx.doi.org/10.3389/fmech.2022.908497.

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Superlubricity is a terminology often used to describe a sliding regime in which the adhesion leading to friction or resistance to sliding literally vanishes. For improved energy security, environmental sustainability, and a decarbonized economy, achieving superlubric sliding surfaces in moving mechanical systems sounds very exciting, since friction adversely impacts the efficiency, durability, and environmental compatibility of many moving mechanical systems used in industrial sectors. Accordingly, scientists and engineers have been exploring new ways to achieve macroscale superlubricity thro

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Tan, Shanchao, Jiayu Tao, Wendi Luo, et al. "Insight Into the Superlubricity and Self-Assembly of Liquid Crystals." Frontiers in Chemistry 9 (June 11, 2021). http://dx.doi.org/10.3389/fchem.2021.668794.

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Liquid crystals are promising molecular materials in the application of lubrication. Herein, the microscale solid superlubricity is accomplished by the construction of uniform and ordered self-assembly of several liquid crystals. The self-assembly structures on a highly oriented pyrolytic graphite (HOPG) surface are explicitly revealed by using scanning tunneling microscopy (STM). Meanwhile, the nanotribological performance of the self-assemblies are measured by using atomic force microscopy (AFM), revealing ultralow friction coefficients lower than 0.01. The interaction energies are calculate

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