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Tribological properties of M0S_(2) coating for ultra-long wear-life and low coefficient of friction combined with additive g-C3N4 in air

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Friction 2021年第4期9卷 789-801页

作者： Yupeng ZHANG Panpan li li JI Xiaohong liU Hongqi WAN Lei CHEN hongxuan li Zhiiiang JIN State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China School of Chemistry and Chemical Engineering North Minzu UniversityYinchuan 750021China

The solid lubricant M0S_(2) demonstrates excellent lubricating properties,but it spontaneously oxidizes and absorbs moisture in air,and thus results in poor wear resistance and short *** this study,the additive g-C_(3)N_(4)(CN)was successfully combined with M0S_(2) via hydrothermal synthesis as a solid lubricant for the first ***,a low friction coefficient(COF,y=0.031)and ultra-long wear-life of CN/M0S_(2) compared to pure M0S_(2) in air were *** functional groups and good crystallinity of the lubricant material were characterized via Fourier transform infrared(FTIR)spectroscopy and X-ray diffraction(XRD).The formed valence states in CN/M0S_(2) were analyzed via X-ray photoelectron spectroscopy(XPS).The characterized results of the scanning electron microscopy(SEM)and high-resolution transmission electron microscopy(HRTEM)show the morphology and interior crystal phase structure of CN/M0S_(2).From the cross-section analysis,the presence of iron oxide nanoparticles lubricating film is synergistic with CN/M0S_(2) film during the friction process,resulting in its ultra-long *** particular,the friction mechanism of interlayer sliding friction combined with energy storage friction was analyzed and proposed.

关键词： solid lubricant CN/M0S2 friction coefficient(COF) wear-life

Study on the Tribological Properties of Graphite-like Amorphous Carbon Film under Different Testing Conditions

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稀有金属材料与工程 2012年第S1期41卷 359-365页

作者： Wang Yongjun li hongxuan Ji li Zhao Fei liu Xiaohong Wu Yanxia Zhou Huidi Chen Jianmin Chinese Acad Sci Lanzhou Inst Chem Phys State Key Lab Solid Lubricat Lanzhou 730000 Peoples R China Chinese Acad Sci Grad Univ Beijing 100049 Peoples R China Henan Univ Sci & Technol Sch Mat Sci & Engn Luoyang 471003 Peoples R China

Graphite-like amorphous carbon film was fabricated by unbalanced magnetron sputtering *** spectroscopy,atomic force microscopy(AFM)and tribometer were subsequently used to investigate the microstructure and tribological properties of the resultant *** is found that the deposited carbon film is dominated by sp 2 sites,and the intensity ratio of the D and G peaks is as high as 4.0,which is one order of magnitude larger than that of diamond-like carbon films with high sp 3 content,indicating a more graphite-like ***,the as-deposited carbon film exhibits moderately high hardness(13.7 GPa),low internal stress(0.38 GPa)and superior tribological properties with high load bearing capacity(Hertz contact stress about 3.2 GPa)and low wear rate(2.73×10-10 cm3/N.m)in ambient *** it displays a poor wear resistance in water lubricated condition,a superior wear resistance is achieved in oil lubricated *** inherent physical property,the formation of transfer layer and the friction induced chemical reactions may be commonly responsible for its tribological properties.

关键词： magnetron sputtering graphite-like carbon film microstructure tribological properties load bearing capacity

Magnetron sputtering NbSe_(2)film as lubricant for space current-carrying sliding contact

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Friction 2023年第3期11卷 383-394页

作者： Yang YANG Lulu PEI Hongzhang ZHANG Kai FENG Pengfei JU Wenshan DUAN li JI hongxuan li Xiaohong liU Huidi ZHOU Jianmin CHEN Key Laboratory of Science and Technology on Wear and Protection of Materials Lanzhou Insttute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China School of Physics and Electronic Engineering Northwest Normal UniversityLanzhou 730070China Division of Energy Storage Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China College of Chemistry&Engineering Yantai UniversityYantai 264005China Shanghai Aerospace Equipment Manufacture Shanghai 200245China

This study demonstrates that magnetron-sputtered NbSe_(2)film can be used as a lubricant for space current-carrying sliding contact,which accommodates both metal-like conductivity and MoS_(2)-like *** at low pressure and low energy is performed to avoid the generation of the interference phase of NbSe_(3).The composition,microstructure,and properties of the NbSe_(2)films are further tailored by controlling the sputtering *** an appropriate current,the film changed from amorphous to crystalline,maintained a dense structure,and exhibited excellent comprehensive *** to the currently available electrical contact lubricating materials,the NbSe_(2)film exhibits a significant advantage under the combined vacuum and current-carrying *** friction coefficient decreases from 0.25 to 0.02,the wear life increases more than seven times,and the electric noise reduces approximately 50%.

关键词： NbSe_(2)films magnetron sputtering vacuum current-carrying tribological properties

Research progress on rolling superlubricity in solid lubricants

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Science China(Technological Sciences) 2024年第7期67卷 1980-1990页

作者： li PanPan li hongxuan ZHU DongXiang ZHU YongQi KANG FuYan WANG Wan ZHANG YaXin liU XiaoHong JI li ZHOU HuiDi CHEN JianMin State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China School of Chemical Engineering Northwest Minzu UniversityLanzhou 730030China

Superlubricity is an ideal lubrication state where friction nearly vanishes between contact interfaces. It has become one of the most important research topics and approaches owing to its significance in reducing energy consumption and preventing device failures. As an efficient and universal lubricating principle capable of achieving superlubricity, rolling lubrication has attracted widespread attention in recent years. In this review, the theoretical concept of rolling lubrication and the experimental research progress of spherical/scroll structures are summarized. The review focuses on the possibility of achieving rolling lubrication using spherical/scroll structures(such as spherical fullerenes, carbon nanotubes, and formed and constructed spherical/scroll structures). The challenges in achieving rolling lubrication are summarized, and the possibility of molecular rolling lubrication,as well as its potential applications in superlubrication, are discussed.

关键词： spherical/scroll structure rolling lubrication superlubricity fullerene

Effect of Ti Incorporation on the Microstructure and Properties of the a-C:H Films Deposited by Magnetron Sputtering Technique

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稀有金属材料与工程 2012年第S1期41卷 366-370页

作者： Wang Yongxia Ye Yinping li hongxuan Ji li Wang Yongjun Wu Yanxia liu Xiaohong Chen Jianmin Zhou Huidi Chinese Acad Sci Lanzhou Inst Chem Phys State Key Lab Solid Lubricat Lanzhou 730000 Peoples R China Chinese Acad Sci Grad Univ Beijing 100049 Peoples R China

Amorphous hydrogenated carbon(a-C:H)and Ti-incorporated a-C:H(Ti/a-C:H)films were deposited by magnetron sputtering with a mixture gas of CH4 and *** effect of the Ti incorporation on the chemical composition,microstructure and properties of the as-deposited and the annealed films were investigated by various *** has been shown that the bonding structure and the internal stress were sensitive to the incorporation of the Ti *** results of the XPS revealed that the concentration of Ti atom on the surface of the film increased when the Ti/a-C:H film annealed at *** tribologcial properties of the(Ti/)a-C:H films changed greatly after annealed,due to the graphitization,oxidation of carbon,and so *** compared and discussed in detail the change of the microstructure and properties of the a-C:H and Ti/a-C:H films before and after

关键词： (Ti)/a-C:H film magnetron sputtering annealing microstructure tribological properties

Lactobacillus plantarum J26 alleviates alcohol-induced oxidative liver injury by regulating the Nrf2 signaling pathway

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Food Science and Human Wellness 2024年第4期13卷 2068-2078页

作者： hongxuan li Shasha Cheng Yuhong Wang Yilin Sun Jiaxin Zhang Mingshuang Sun Chaoxin Man Yu Zhang Yujun Jiang Key Laboratory of Dairy Science Ministry of EducationCollege of Food Science and EngineeringNortheast Agricultural UniversityHarbin 150030China

Oxidative stress is one of the main ways to cause alcohol-induced liver injury,and alcoholic liver disease(ALD)has been a common health problem *** acid bacteria(LAB)is also considered as a potential treatment to alleviate alcohol-induced liver *** plantarum J26 is a LAB isolated from Chinese traditional fermented dairy products with excellent probiotic *** study aimed to establish a mice model of alcoholic liver injury through acute-on-chronic alcohol feeding and to study the alleviating effect of pre-intake of *** J26 on alcohol-induced oxidative liver injury and focus on its potential mechanism of alleviating *** results showed that pre-intake of *** J26 could improve liver pathological changes,reduce lipid accumulation,increase mitochondrial ATP and mitochondrial(mtDNA)levels,and alleviate liver *** addition,pre-intake *** J26 can improve the level of short-chain fatty acids(SCFAs)in the intestines in mice,short chain fatty acids can be used as a signaling molecule activation of nuclear factor E2-related factor 2(Nrf2)signaling pathway to alleviate liver oxidative stress,and maintain mitochondrial homeostasis by regulating the expression of genes related to mitochondrial dynamics and autophagy,thereby reducing cell apoptosis to alleviate alcohol-induced oxidative liver injury.

关键词： Alcoholic liver disease Probiotics Nuclear factor E2-related factor 2(Nrf2) Oxidative stress Short-chain fatty acids

Research Advances in the Immunomodulatory Mechanisms of Probiotics on Non-Specific and Specific Immunity

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Food Science and Human Wellness 2024年

作者： Haijie Zhao hongxuan li Yiqing Zhao Tong Wu Yiling Deng Yanmei Hou Wei Zhang Chaoxin Man Yu Zhang Qianyu Zhao Yujun Jiang Key Laboratory of Dairy Science， Ministry of Education， College of Food Science and Engineering， Northeast Agricultural University

Probiotics can regulate the body's immune system through both non-specific and specific immunity， thereby regulating host health. In terms of non-specific immune regulation， probiotics can activate the intrinsic immune system， regulate the mucosal barrier function， and play an immune role by influencing the activity of intrinsic immune cells such as macrophages， dendritic cells and natural killer cells， as well as their differentiation and maturation; in terms of specific immune regulation， probiotics play a role in regulating the immunoglobulin level and the maturation of B cells. Probiotics can also regulate T-cell differentiation according to the condition of the body， thus regulating specific immunity. Many studies have focused on the role of probiotics in metabolism and nutrition， and the mechanisms involved in the immunomodulatory role of probiotics have only been partially described. This review summarises the role of common probiotics such as Lactobacillus plantarum and Lactobacillus rhamnosus in immunomodulation as well as their mechanisms， describing the currently known mechanisms of immunomodulation by probiotics in improving the host immune system. A deeper understanding of probiotics and their specific mechanisms of action will facilitate the use of probiotics for immunomodulation in clinical medicine， functional foods， and other areas. This will also contribute to the development and research of engineered probiotics， next-generation probiotics， and other new functional probiotics with immunomodulatory effects.

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基于层次分析法的辽宁省绿色物流SWOT分析

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科技管理研究 2016年第1期36卷 252-256页

作者：邰晓红李洪萱辽宁工程技术大学辽宁葫芦岛125105

辽宁省作为我国最重要的老工业基地,其快速发展的背后必然离不开现代物流业的支撑。为了现代物流业的可持续发展,绿色物流的发展势在必行。利用SWOT-AHP相结合的方法,构建一个定量分析和定性分析相结合的模型。首先利用SWOT法分析辽宁... 详细信息

辽宁省作为我国最重要的老工业基地,其快速发展的背后必然离不开现代物流业的支撑。为了现代物流业的可持续发展,绿色物流的发展势在必行。利用SWOT-AHP相结合的方法,构建一个定量分析和定性分析相结合的模型。首先利用SWOT法分析辽宁省物流业的优势、劣势、机遇与威胁,在此基础上利用AHP法确定各因素的权重并排序,最后提出辽宁省未来的物流业战略导向。

关键词：绿色物流发展战略 SWOT—AHP分析法

MoS_(2)-C异质复合薄膜的真空超滑行为及其机制研究

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摩擦学学报 2023年第10期43卷 1140-1150页

作者：李煊禹吉利刘晓红孙初锋李红轩西北民族大学化工学院环境友好复合材料国家民委重点实验室甘肃兰州730030 中国科学院兰州化学物理研究所固体润滑国家重点实验室甘肃兰州730000

采用闭合场非平衡磁控溅射技术制备了MoS_(2)-C异质复合薄膜,利用多环境可控摩擦试验机测试了薄膜在真空环境中的摩擦学性能,通过拉曼光谱仪(Raman)、X射线衍射仪(XRD)和透射电子显微镜(TEM)等表征手段分析了薄膜摩擦前后结构的变化,探... 详细信息

采用闭合场非平衡磁控溅射技术制备了MoS_(2)-C异质复合薄膜,利用多环境可控摩擦试验机测试了薄膜在真空环境中的摩擦学性能,通过拉曼光谱仪(Raman)、X射线衍射仪(XRD)和透射电子显微镜(TEM)等表征手段分析了薄膜摩擦前后结构的变化,探讨了超润滑机理.结果表明:复合薄膜呈现致密的“纳米晶/非晶”结构,在真空中具有优异的摩擦学性能,保持了超低摩擦系数(0.006~0.009)和磨损率[1.026×10^(-7)mm^(3)/(N·m)],达到了超润滑状态.摩擦过程中碳选择性转移到钢球表面形成非晶碳转移层,薄膜磨痕表面形成有序的MoS_(2)(002)晶面,摩擦发生在MoS_(2)有序晶体和非晶碳转移膜之间,形成非公度异质接触,降低摩擦系数实现超润滑.钢球/MoS_(2)-Ti、a-C:H/MoS_(2)-Ti摩擦配副在相同条件下的不同摩擦行为,也证明了上述超润滑机理.

关键词： MoS_(2)-C复合薄膜超润滑真空摩擦学性能非公度接触