Article
Engineering, Chemical
Cong Liu, Yanguo Yin, Congmin Li, Ming Xu, Rongrong Li, Qi Chen
Summary: Nano Bi particles were chemically modified to improve their dispersion and stability. The addition of modified nano Bi particles significantly improved the tribological properties of liquid paraffin oil.
Article
Engineering, Mechanical
Xiaozhi Zhang, Yaojie Yan, Peng Wang, Tingting Zhang, Shujuan Liu, Qian Ye, Feng Zhou
Summary: The thiadiazole functionalized covalent organic frameworks were synthesized using polydopamine as a connection layer. The fluorine-containing COF-F was prepared through solvothermal reaction and then coated with a PDA layer. The anti-wear agent thiadiazole dimer covalently bonded with PDA to obtain thiadiazole functionalized COFs (DTD@COF-F), which exhibited good tribological properties as oil-based lubricant additives, including a low and stable friction coefficient (0.104) and a 67.8% reduction in wear volume compared to the base oil 500SN. The excellent lubrication performance is attributed to the robust protective tribo-film and the easy absorption of the anti-wear thiadiazole molecule functionalized COFs onto the friction pairs.
TRIBOLOGY INTERNATIONAL
(2023)
Review
Chemistry, Physical
Nora Nyholm, Nuria Espallargas
Summary: Carbon nanostructures have been proposed as potential candidates for a new generation of lubricant additives due to their excellent properties. This review surveys the literature on carbon nanostructures as lubricant additives and identifies dimensionality, structural integrity, and chemical interactions as important properties governing their tribological behavior.
Article
Engineering, Mechanical
Kunpeng Wang, Huaichao Wu, Hongdong Wang, Yuhong Liu, Lv Yang, Limei Zhao
Summary: The study prepared molybdenum-dotted nanoplatelets using an aqueous miscible organic solvent treatment method, enhancing the specific surface area and dispersion of attapulgite. The nanoplatelets showed excellent tribological properties and self-repairing ability in an oil-based lubricant system.
Article
Engineering, Chemical
G. Mobarhan, A. Zolriasatein, M. Ghahari, M. Jalili, M. Rostami
Summary: This study synthesized spherical MoS2 nanoparticles with multiple nanosheets through the hydrothermal method and investigated the effect of nanoparticle concentration on wear properties. The results showed that nanoparticles with a thickness of 10 nm exhibited the best wear performance, reducing wear width and friction coefficient by about 50% at a concentration of only 0.05 wt-%.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Multidisciplinary Sciences
Yosef Jazaa, Sriram Sundararajan
Summary: Lubricants can improve the anti-wear performance of machines by adding nanoparticles and surfactants, with favorable wear resistance achieved under boundary lubricant conditions by minimizing particle agglomeration and promoting high dispersion.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Nurul Athirah Ismail, Zaira Zaman Chowdhury, Mohd Rafie Johan, Nurin Wahidah Mohd Zulkifli
Summary: AGO-C(n)/MoS2 composites were synthesized using a facile hydrothermal method and investigated for their tribological properties as lubricant additives in Group III petroleum-based oil. Results showed that the composites significantly improved friction reduction and antiwear properties of the oil, with the 1:1 mass ratio AGO-C14/MoS2 composite exhibiting the best performance. This enhanced tribological behavior was attributed to the synergistic effect and unique layered structure of AGO-C(n) and MoS2.
ADVANCED ENGINEERING MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Tianyi Sui, Lichao Li, Bin Lin, Yuhang Zhang, Benyang Zhang, Shuai Yan
Summary: The research demonstrates that ZIF-8 nanoparticles exhibit significant reduction in friction and wear, with the optimal performance seen at a concentration of 1wt%. Moreover, amino-modified ZIF-8 nanoparticles show superior lubrication properties compared to unmodified ZIF-8.
FRONTIERS IN CHEMISTRY
(2021)
Article
Chemistry, Physical
Ruozheng Wang, Chufeng Sun, Xiaoyan Yan, Tingting Guo, Wenjun Xiang, Zhaozhao Yang, Qiangliang Yu, Bo Yu, Meirong Cai, Feng Zhou
Summary: Four types of choline/fatty acid ionic liquids were synthesized and used as water-based lubricant additives in an ethylene glycol system. The tribological behaviors of the mixtures were investigated under the control of an applied electric field. The [Ch][SA] ionic liquid showed excellent tribological properties due to its strong adsorption and tribochemical reaction film formation on the metal surface.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Engineering, Mechanical
Yixin Wang, Qi Lu, Huijie Xie, Shujuan Liu, Qian Ye, Feng Zhou, Weimin Liu
Summary: This study presents nitrogen-doped microporous carbon nanospheres (N@MCNs) prepared by a polymerization-carbonization process using low-cost styrene. The friction performance of N@MCNs as lubricating oil additives was investigated and showed excellent reduction in friction and wear. Through the analysis of the lubrication mechanism, it was found that the N@MCNs enter the clearance of the friction pair, transform the sliding friction into a mixed friction of sliding and rolling, and repair the contact surface through the repair effect. Furthermore, the tribochemical reaction between nanoparticles and friction pairs forms a protective film containing nitride and metal oxides, improving the tribological properties.
Article
Engineering, Chemical
Xiaoliang Ma, Chaoliang Gan, Xiaopeng Li, Yuting Li, Peng Feng, Xiaoqiang Fan, Xiangyuan Ye, Minhao Zhu
Summary: Core-shell structural SiO2@Cu and SiO2@MoS2 microspheres as lubricant additives show improved tribological properties, with SiO2@Cu microspheres outperforming SiO2@MoS2 due to their structural advantage and the synergistic effect of hard SiO2 core and Cu shell.
Article
Chemistry, Physical
Hong Guo, Chenyang Lou, Junru Pang, Victoria Bellomo, Natalie Mantegna, Patricia Iglesias
Summary: A series of protic ionic liquids (PILs) derived from linear alkyl-benzenesulfonic acids with different alkyl chain length were synthesized in the laboratory and studied as additives to improve the frictional performance of mineral oil. The results showed that all PILs significantly enhanced the lubricity of mineral oil at low concentrations.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Energy & Fuels
Meen Sung Koo, Sun-Young Lee, Qinglin Wu
Summary: This study investigated the effects of lignocellulosic nanomaterials and water-soluble polymers on the properties of bentonite-water suspensions. The results showed that nanofibrillated cellulose (NFC) improved rheological performance but adversely affected filtration properties, while reground NFC improved rheological properties without significant effect on fluid loss. Lignin-containing NFC (LNFC) enhanced viscosity and filtration performance. LNFC with moderate amounts of lignin, in combination with biopolymer additives, can significantly improve the rheological and filtration performance of BT-based fluids.
Article
Environmental Sciences
Yashvir Singh, Nishant Kumar Singh, Abhishek Sharma, Irfan Anjum Badruddin, Sarfaraz Kamangar
Summary: This study investigates the use of vegetable oils as environmentally sustainable lubricants and enhances the physicochemical properties and tribological performance of rubber seed oil through chemical modification and the addition of additives.
WASTE AND BIOMASS VALORIZATION
(2023)
Article
Engineering, Mechanical
Weiwei Tang, Yi Wang, Xuejun Zhu, Zhe Zhang, Wei Zhu, Haidong Liu, Wei Gao, Yufeng Li
Summary: Undoubtedly, advancements in water-based nano-additives have played a significant role in energy conservation and pollution reduction, particularly in the case of water-based lubricants. Graphitic carbon nitride quantum dots (g-CNQDs) have garnered considerable attention as water-based lubricant additives due to their excellent designability, favorable mechanical properties, and unique self-lubricating effect. In this study, g-CNQDs of different sizes were synthesized via a hydrothermal strategy and directly employed as additives in water-based lubricants. Tribological tests revealed that the performance of the g-CNQDs-based additives showed a clear dependence on their physical dimensions. By introducing g-CNQDs-based additives (1.0 wt%) into the water-based lubrication system, the friction-reduction, anti-wear, and load-supporting capabilities were maximally enhanced by 45.5%, 94.0%, and 233.3%, respectively. Additionally, the long-term performance of the lubrication system was improved under high-load conditions. This can be attributed to the tribo-film formed through tribo-chemical reactions, combined with the nano-lubrication effect of g-CNQDs.