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Research progresses of nanomaterials as lubricant additives

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Friction 2024年第7期12卷 1347-1391页

作者： Zhengquan JIANG Yankun SUN Bokang LIU Laigui YU Yuping TONG Mingming YAN Zhongzheng YANG Yongxing HAO Linjian SHANGGUAN Shengmao ZHANG Weihua LI School of Materials Science and Engineering North China University of Water Resources and Electric PowerZhengzhou 450045China Institute of Special Friction and Lubricating Materials North China University of Water Resources and Electric PowerZhengzhou 450045China Nanomaterials Engineering Research Center Henan UniversityKaifeng 475001China School of Mechanical Engineering North China University of Water Resources and Electric PowerZhengzhou 450045China

Friction and wear are unavoidable in mechanical *** use of lubricants with nano-additives can effectively reduce friction and wear,which is of great significance to saving energy and protecting the *** present,great progress has been made in the scientific research and industrial application of nano-additives for *** paper mainly introduces the types of nano-additives for lubricants(such as carbon nanomaterials,nano-metals,nano-oxides,sulfides,complexes,polymers,etc.),the tribological properties of lubricants with different components of nano-additives,and the lubrication mechanisms of the nano-additives(including tribofilm formation,rolling ball bearing effect,repairing effect,polishing effect,and synergistic effect).It also deals with the dispersion of nano-additives in lubricants and the influences of their particle size and microstructure on the tribological properties of *** review outlines the performance requirements of nano-additives in different lubrication states,discusses the use of nano-additives in challenging working conditions,and identifies various industrial oil nano-additives with reference to the appropriate options in diverse working ***,the existing problems of nano-additives and their application prospects are *** review,hopefully,would help to shed light on the design and synthesis of novel high-performance nano-additives and promote their application in engineering.

关键词： nanomaterials lubricant additive lubrication mechanism research progress

Minimum quantity lubrication machining of aeronautical materials using carbon group nanolubricant: From mechanisms to application

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Chinese Journal of Aeronautics 2022年第11期35卷 85-112页

作者： Xin CUI Changhe LI Wenfeng Ding Yun CHEN Cong MAO Xuefeng XU Bo LIU Dazhong WANG Hao Nan LI Yanbin ZHANG Zafar SAID Sujan DEBNATH Muhammad JAMIL Hafiz Muhammad ALI Shubham SHARMA School of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdao 266520China College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China Chengdu Tool Research Institute Co. Ltd.Chengdu 610500China College of Automotive and Mechanical Engineering Changsha Universiy of Science and TechnologyChangsha 410ll14China Key Laboratory of Special Purpose Equipment and Advanced Processing Technology Ministry of Education&Zhejiang ProvinceZhejiang University of TechnologyHangzhou 310032China Sichuan Future Aerospace Industry LLC. Shifang 618400China School of Mechanical and Automotive Engineering Shanghai University of Engineering ScienceShanghai 201620China School of Aerospace Universiy of Notingham Ningbo ChinaNingbo 315100China College of Engineering Universityof SharjahSharjah 27272United Arab Emirates Mechanical Engineering Department Curtin UniversityMiri 98009Malaysia Mechanical Engineering Department King Fahd University of Petroleum and MineralsDhahran 31261Saudi Arabia Department of Mechanical Engineering and Advanced Materials Science Council of Scientific and Industrial Research(CSIR)-Central Leather Research Institute(CLRI)Regional Center for Extension and DevelopmentJalandhar 144021India

It is an inevitable trend of sustainable manufacturing to replace flood and dry machining with minimum quantity lubrication(MQL)***,for aeronautical difficult-tomachine materials,MQL couldn’t meet the high demand of cooling and lubrication due to high heat generation during ***-biolubricants,especially non-toxic carbon group nano-enhancers(CGNs)are used,can solve this technical ***,the machining mechanisms under lubrication of CGNs are unclear at complex interface between tool and workpiece,which characterized by high temperature,pressure,and speed,limited its application in factories and necessitates in-depth *** fill this gap,this study concentrates on the comprehensive quantitative assessment of tribological characteristics based on force,tool wear,chip,and surface integrity in titanium alloy and nickel alloy machining and attempts to answer mechanisms ***,to establish evaluation standard,the cutting mechanisms and performance improvement behavior covering antifriction,antiwear,tool failure,material removal,and surface formation of MQL were ***,the unique film formation and lubrication behaviors of CGNs in MQL turning,milling,and grinding are *** influence law of molecular structure and micromorphology of CGNs was also answered and optimized options were recommended by considering diverse boundary ***,in view of CGNs limitations in MQL,the future development direction is proposed,which needs to be improved in thermal stability of lubricant,activity of CGNs,controllable atomization and transportation methods,and intelligent formation of processing technology solutions.

关键词： Aerospace materials Carbon nanoparticles Grinding lubrication mechanism Milling Minimum quantity lubrication Turning

Insights into the tribological behavior of choline chloride-urea and choline chloride-thiourea deep eutectic solvents

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Friction 2023年第1期11卷 76-92页

作者： Yuting LI Yuan LI Hao LI Xiaoqiang FAN Han YAN Meng CAI Xiaojun XU Minhao ZHU Key Laboratory of Advanced Technologies of Materials(Ministry of Education) School of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China Tribology Research Institute School of Mechanical EngineeringSouthwest Jiaotong UniversityChengdu 610031China

Deep eutectic solvents(DESs)have been considered as novel and economic alternatives to traditional lubricants because of their similar physicochemical *** this study,choline chloride(ChCl)DESs were successfully synthesized via hydrogen-bonding networks of urea and thiourea as the hydrogen bond donors(HBDs).The as-synthesized ChCl-urea and ChCl-thiourea DESs had excellent thermal stability and displayed good lubrication between steel/steel *** friction coefficient and wear rate of ChCl-thiourea DES were 50.1%and 80.6%,respectively,lower than those of ChCl-urea DES for GCr15/45 steel ***,for GCr15/Q45 steel,ChCl-urea DES decreased the wear rate by 85.0%in comparison to ChCl-thiourea *** ChCl-thiourea DES lubrication,the tribo-chemical reaction film composed of FeS formed at the interfaces and contributed to low friction and ***,under high von Mises stress,the film could not be stably retained and serious wear was obtained through direct contact of friction *** illustrated that the evolution of the tribo-chemical reaction film was responsible for the anti-friction and anti-wearproperties of the DESs.

关键词： deep eutectic solvents(DESs) tribo-chemical film von Mises stress lubrication mechanism

Nanolubricant additives: A review

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Friction 2021年第5期9卷 891-917页

作者： Jun ZHAO Yiyao HUANG Yongyong HE Yijun SHI College of Mechanical and Electrical Engineering Beijing University of Chemical TechnologyBeijing 100029China State Key Laboratory of Tribology Tsinghua UniversityBeijing 100084China Division of Machine Elements LuleåUniversity of TechnologyLuleå97187Sweden

Using nanoadditives in lubricants is one of the most effective ways to control friction and wear,which is of great significance for energy conservation,emission reduction,and environmental *** the scientific and technological development,great advances have been made in nanolubricant additives in the scientific research and industrial *** review summarizes the categories of nanolubricant additives and illustrates the tribological properties of these *** on the component elements of nanomaterials,nanolubricant additives can be divided into three types:nanometal-based,nanocarbon-based,and nanocomposite-based *** dispersion stabilities of additives in lubricants are also discussed in the review *** affecting factors and effective dispersion methods have been investigated in ***,the review summarizes the lubrication mechanisms of nanolubricant additives including tribofilm formation,micro-bearing effect,self-repair performance,and synergistic *** addition,the challenges and prospects of nanolubricant additives are proposed,which guides the design and synthesis of novel additives with significant lubrication and antiwear properties in the future.

关键词： nanolubricant additive dispersion stability tribological properties lubrication mechanism

Role of nanoparticles in achieving macroscale superlubricity of graphene/nano-SiO_(2) particle composites

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Friction 2022年第9期10卷 1305-1316页

作者： Panpan LI Li JI Hongxuan LI Lei CHEN Xiaohong LIU Huidi ZHOU Jianmin CHEN Key Laboratory of Science and Technology on Wear and Protection of Materials Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Recent studies have reported that adding nanoparticles to graphene enables macroscale superlubricity to be *** study focuses on the role of nanoparticles in achieving ***,because graphene nanoscrolls can be formed with nanoparticles as seeds under shear force,the applied load(or shear force)is adjusted to manipulate the formation of graphene nanoscrolls and to reveal the relationship between graphene-nanoscroll formation and superlubricating ***,the load-carrying role of spherical nano-SiO_(2)particles during the friction process is verified by comparison with an elaborately designed fullerene that possesses a hollow-structured graphene *** indicate that the incorporated nano-SiO_(2)particles have two roles in promoting the formation of graphene nanoscrolls and exhibiting load-carrying capacity to support macroscale forces for achieving macroscale ***,macroscale superlubricity(friction coefficient:0.006–0.008)can be achieved under a properly tuned applied load(2.0 N)using a simple material system in which a graphene/nano-SiO_(2)particle composite coating slides against a steel counterpart ball without a decorated diamond-like carbon *** approach described in this study could be of significance in engineering.

关键词： nano-SiO_(2)particles graphene macroscale superlubricity lubrication mechanism

Black phosphorus quantum dots: A new-type of water-based high-efficiency lubricant additive

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Friction 2021年第6期9卷 1528-1542页

作者： Weiwei TANG Zhiqiang JIANG Baogang WANG Yufeng LI School of Biological and Chemical Engineering Panzhihua UniversityPanzhihua 617000China College of Chemistry and Chemical Engineering Southwest Petroleum UniversityChengdu 610500China

Black phosphorus quantum dots(BPQDs),obtained via a typical solution-based top-down method,were used as water-based lubricant *** exhibited remarkable friction reduction and anti-wear properties even at the ultra-low concentration of 0.005 wt%,which reduced the friction coefficient and wear volume of the base liquid by 32.3%and 56.4%,*** addition,the load-supporting capacity of the base liquid increased from 120 N to over 300 ***-based additives exhibited a relatively long lifetime at a relatively high load of 80 *** performance of BPQDs considerably exceeded that of the BP;this may be attributed to their small and uniform particle size,good dispersion stability in water,and high reactivity at the frictional *** results of the surface wear resistance analysis demonstrated that a robust tribochemical film with a thickness of approximately 90 nm was formed on the rubbing surface lubricated with 0.005 wt%of BPQDs ***,the film served as a direct evidence of the excellent tribological performance of BPQDs.

关键词： black phosphorus quantum dots water-based lubricant additives tribological performance lubrication mechanism

Tribological performance of various metal-doped carbon dots as water-based lubricant additives and their potential application as additives of poly(ethylene glycol)

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Friction 2022年第5期10卷 688-705页

作者： Weiwei TANG Xuejun ZHU Yufeng LI School of Biological and Chemical Engineering Panzhihua UniversityPanzhihua 617000China

Advances in nano-lubricant additives are vital to the pursuit of energy efficiency and sustainable *** dots(CDs)have been widely investigated in the domain of lubricant additives owing to their extraordinary tribological properties,in particular,their friction-reducing and anti-wear ***-doped CDs are a new type of CDs,and their friction-reducing and anti-wear properties are attracting increasing ***,a series of CDs doped with various divalent metal ions have been successfully synthesized via one-pot *** tribological properties of the synthesized CDs as water-based lubricant additives are in the following order:Zn-CDs>Cu-CDs>>Mg-CDs>Fe-CDs>***,adding 1.0 wt%of Zn-CDs into water-based lubricant results in 62.5%friction and 81.8%wear ***,the load-carrying capacity of the water-based lubricant increases from 120 N to at least 500 ***-CDs as an additive have long service ***,anion-tuned Zn-CDs fabricated via anion exchange exhibit promise as lubricant additives for poly(ethylene glycol).Based on the results of wear scar surface analyses,it is discovered that tribochemical films,primarily composed of iron oxides,nitrides,metal carbonates,zinc oxides,zinc carbonates,organic compounds,and embedded carbon cores,formed on the rubbing surfaces with a thickness of approximately 270 nm when Zn-CDs are used as *** film combined with the“ball-bearing”and third-particle effects of Zn-CDs contributed to excellent lubrication performance.

关键词： metal-doped carbon dots(CDs) water-based lubricant additives tribological performance lubrication mechanism

Characterizing a lubricant additive for 1,3,4-tri-(2-octyldodecyl) cyclopentane: Computational study and experimental verification

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Friction 2016年第3期4卷 257-265页

作者： Jingyan NIAN Yifan SI Zhiguang GUO Ping GAO Weimin LIU State Key Laboratory of Solid lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China State Key Laboratory of Solid lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 ChinaHubei Collaborative Innovation Centre for Advanced Organic Chemical Materials and Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials Hubei University Wuhan 430062 China

In order to increase the life of spacecraft, it is important to improve the comprehensive lubrication performance. Multiple alkylated cyclopentane (MAC) lubricants are presently gaining wide acceptance for actual space applications; adding extreme pressure additive is a strategy to improve lubrication performance. In this study, taking 1,3,4-tri-(2-octyldodecyl) cyclopentane as base oil, tricresol phosphate (traditional additive) and tri-(2-octyldodecyl) phosphate (developmental additive) have been screened computationally for compatibility, shear film forming and energy dissipation. Theoretical results indicate that (a) tricresol phosphate additive is not suited for addition to 1,3,4-tri-(2-octyldodecyl) cyclopentane lubricant due to limited compatibility; (b) tri-(2-octyldodecyl) phosphate is an excellent lubricant additive due to its perfect compatibility, ease of forming a shear film on the surface of friction pairs, higher strength, and low energy dissipation; and (c) lubrication occurs through the solid-liquid composite lubrication mechanism. These theoretical results were confirmed experimentally.

关键词： 1,3,4-tri-(2-octyldodecyl) cyclopentane lubricant additive computational screening lubrication mechanism experimental verification

Effects of magnetic ionic liquid as a lubricant on the friction and wear behavior of a steel-steel sliding contact under elevated temperatures

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Friction 2021年第1期9卷 61-74页

作者： Jiajia JIA Guangbin YANG Chunli ZHANG Shengmao ZHANG Yujuan ZHANG Pingyu ZHANG Engineering Research Center for Nanomaterials Henan UniversityKaifeng 475004China Institute of Pharmacy Henan UniversityKaifeng 475004China

A magnetic ionic liquid(abridged as MIL)[C_(6)mim]_(5)[Dy(SCN)_(8)]was prepared and used as the magnetic lubricant of a steel-steel sliding *** tribological properties of the as-prepared MIL were evaluated with a commercially obtained magnetic fluid lubricant(abridged as MF;the mixture of dioctyl sebacate and Fe_(3)O_(4),denoted as DIOS-Fe_3O_4)as a *** lubrication mechanisms of the two types of magnetic lubricants were discussed in relation to worn surface analyses by SEM-EDS,XPS,and profilometry,as well as measurement of the electric contact resistance of the rubbed steel *** results revealed that the MIL exhibits better friction-reducing and antiwear performances than the as-received MF under varying test temperatures and *** is because the MIL participates in tribochemical reactions during the sliding process,and forms a boundary lubrication film composed of Dy_(2)O_(3),FeS,FeSO_(4),nitrogen-containing organics,and thioether on the rubbed disk surface,thereby reducing the friction and wear of the frictional ***,the MF is unable to form a lubricating film on the surface of the rubbed steel at 25°C,though it can form a boundary film consisting of Fe_(3)O_(4) and a small amount of organics under high ***,the excessive Fe_(3)O_(4) particulates that accumulate in the sliding zone may lead to enhanced abrasive wear of the sliding pair.

关键词： steel-steel sliding contact magnetic ionic liquid magnetic fluid lubricant tribological property lubrication mechanism