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Tribological behaviors of Ni-modified citric acid carbon quantum dot particles as a green additive in polyethylene glycol

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Friction 2020年第1期8卷 182-197页

作者： Zhiqiang TU Enzhu hu Bangbang WANG Karl D DAVID Philipp SEEGER Martin MONEKE Ralph STENGLER Kunhong hu xianguo hu Department of Chemical and Materials Engineering Hefei UniversityHefei 230601China School of Mechanical Engineering Institute of TribologyHefei University of TechnologyHefei 230009China Department of Mechanical Engineering School of EngineeringUniversity of BirminghamBirmingham B152TTUnited Kingdom Darmstadt Institute of Plastics Engineering University of Applied Sciences DarmstadtDarmstadt 64295Germany

A novel green lubricating oil additive(carbon quantum dot(CQD)particle‐doped nickel(Ni‐CQD))was synthesized from citric acid and nickel *** effects of CQD and Ni‐CQD nanoparticles on the tribological behaviors of polyethylene glycol(PEG200)were investigated under different loads and reciprocation *** results indicate that CQD and Ni‐CQD particles can both enhance the lubrication properties of ***,the Ni‐CQD nanoparticles enhanced the lubrication properties more than the plain CQD particles *** average friction coefficient and wear rate of PEG200 containing 2 wt%Ni‐CQDs were reduced by 35.5%and 36.4%,respectively,compared to PEG200 containing pure CQDs under a load of 8 N and reciprocation speed of 25 mm/s over 60 *** friction and wear mechanisms are attributed to the fact that friction induces the Ni‐CQDs to participate in the formation of a tribofilm,resulting in a low friction coefficient and wear rate.

关键词： friction dynamics joint clearance numerical models impact durability

Effect of Diesel Soot on the Distribution,Composition and Mechanical Properties of ZDDP Tribofilm

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China Petroleum Processing & Petrochemical Technology 2021年第3期23卷 119-126页

作者： Feng Weimin Song hui Song Ruhong Yang Bingxun hu xianguo School of Mechanical Engineering Hefei University of TechnologyHefei 230009

To investigate the effect of diesel soot on the distribution,composition and mechanical properties of ZDDP tribofilm,a HFRR tribometer was applied to study the tribological *** surfaces lubricated with ZDDP and soot were analyzed by laser microscopy,SEM/EDS,Raman spectroscopy,XPS,and a nano-indentation *** show that soot scrapes off the ZDDP tribofilm and can be embedded into the worn surface,leading to the reduction of film thickness and non-uniform distribution of *** phosphate structure in ZDDP tribofilm changes from short chain pyrophosphate to long chain metaphosphate due to the increased contact stress caused by the soot abrasive wear,which can promote the cross-linking of *** hardness(H)and elastic modulus(E)of the worn surfaces increase,while the ratio of hardness to elastic modulus,H/E,decreases,which indicates that the reduction of wear resistance is caused by the soot.

关键词： soot ZDDP tribofilm chemical composition mechanical properties

Effect of Biodiesel Soot on Tribological Behavior of Liquid Paraffin

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China Petroleum Processing & Petrochemical Technology 2018年第3期20卷 106-113页

作者： Li Chuan Wei Daozhu Zhuang Yuan Song Ruhong hu xianguo School of Mechanical Engineering Hefei University of Technology School of Automobile and Transportation Engineering Hefei University of Technology

Biodiesel soot （BDS） was collected from the combustion of biodiesel using a self-made soot trap. The effect of BDS on the txibological behavior of liquid paraffin （LP） was investigated using a four-ball txibometer. A rotating viscometer was used to investigate the effect of BDS on the viscosity of LE The morphology, composition, and tribological mechanism of BDS were studied by means of FETEM, XRD, XPS, SEM/EDS, and the 3D laser scanning microscopy. Test results showed that the BDS aggregates were chain-like, and the average diameter of BDS was 35 nm. The BDS existed in the form of graphitic layers and amorphous carbon. The oxygen-containing functional groups in BDS consisted of the （C-O-C） and （C-O-H）. With an increasing BDS content, the dynamic viscosity of LP increased and the maximum non-seizure load increased initially and became stable later. In addition, the average wear scar diameter （AWSD） of LP increased and the average friction coefficient of LP decreased at first and then increased later. The tribological mechanisms could be ascribed to the variation in content of BDS： BDS could act as a friction modifier for a lower friction coefficient in case of low BDS content. However, the BDS aggregates could lead to increase of abrasive wear to influence the lubricating oil film at higher content of BDS, which would reduce the friction reduction ability and wear resistance of LP.

关键词： biodiesel soot tribological behavior liquid paraffin

Preparation,Dispersion and Tribological Properties of Oleophilic Lanthanum Hydroxide/Graphene Oxide Nanocomposites

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China Petroleum Processing & Petrochemical Technology 2020年第2期22卷 111-121页

作者： Wu Bo Zhang Qiangqiang Song hui Yang Bingxun Tian Ming hu xianguo School of Mechanical Engineering Hefei University of TechnologyHefei 230009

Lanthanum hydroxide/graphene oxide nanocomposites(La(OH)3/GO)modified by octadecylamine(OCA),oleylamine(OLA),and polyvinylpyrrolidone(PVP)were prepared,respectively,as the base oil *** dispersion stability of different modified La(OH)3/GO in base oil was studied by means of *** tribological properties of oleophilic La(OH)3/GO in base oil were investigated using an UMT ball-disc *** micro-morphology and chemical composition of the worn surface were characterized by 3 D laser microscope,SEM,EDS,XPS,and Raman spectroscopy,*** wettability performance of the worn surface was also studied based on the contact angle *** test results showed that the OLA-La(OH)3/GO nanocomposites had good dispersion stability in base *** anti-wear performance of base oil was improved significantly by the addition of OLA-La(OH)3/GO *** characterizations of worn surface showed that the OLA-La(OH)3/GO nanocomposites could form the metal oxide and graphene protective films effectively on the friction interface and thus increased the oil wettability of the worn surface,thereby resulting in an improved wear resistance.

关键词： oleophilic modification La(OH)3/GO nanocomposites dispersion stability tribological property

Novel Approach for Improved Tribological Behavior of Biodiesel Soot in Liquid Paraffin

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China Petroleum Processing & Petrochemical Technology 2019年第1期21卷 101-109页

作者： Li Chuan Song hui Zhang Jun Wu Bo Zhang Qiangqiang Zhuang Yuan hu xianguo School of Mechanical Engineering Hefei University of Technology School of Automobile and Transportation Engineering Hefei University of Technology

To improve the tribological behavior of biodiesel soot(BDS) in liquid paraffin(LP), the order of biodiesel soot was increased through thermally oxidized treatment at 500 ℃, and the oil solubility was then improved through a modification using oleylamine(OLA). The BDS and thermally oxidized oleylamine-modified BDS(T-BDS-OLA)were characterized through various methods including the use of TG, FETEM, Raman spectroscopy, FTIR, and a zeta potentiometer. The tribological properties and mechanisms of the BDS before and after the thermally oxidized treatment modification were investigated using a ball-on-disc reciprocating tribometer, FESEM, 3 D laser-scanning microscopy, and Raman spectroscopy. The results showed that T-BDS-OLA has a higher degree of order than the BDS, with an onion-like microstructure. BDS and T-BDS-OLA can both improve the antifriction and antiwear properties of LP at a soot content of 0.1%-0.4%, while T-BDS-OLA in LP shows better antifriction and antiwear properties than BDS. The tribological mechanisms can be attributed to both types of soot acting as spacing and roll bearing between the friction surfaces. In addition, the exfoliated graphitic sheets from T-BDS-OLA can form a carbon lubrication layer providing easy sliding.

关键词： biodiesel soot liquid paraffin antifriction and antiwear carbon onion

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城轨无场段条件下物资仓储管理系统研究

移动信息 2024年第9期46卷 49-51,54页

作者：陈诗周游胡贤国吴庆辉刘伯鹍余星阳中国电建集团华东勘测设计研究院有限公司杭州311122

针对无场段条件下存在的物资库分散、没有物资总库、物资管理效率低下、易对线路高效安全运营造成负面影响等问题,文中以物资编码、二维码、流程管理等技术为基础,提出了一套物资入库、出库、借用、盘点、报废的物资闭环管理系统.通过... 详细信息

针对无场段条件下存在的物资库分散、没有物资总库、物资管理效率低下、易对线路高效安全运营造成负面影响等问题,文中以物资编码、二维码、流程管理等技术为基础,提出了一套物资入库、出库、借用、盘点、报废的物资闭环管理系统.通过去中心化的单据管理模式,可以提高物资入库、出库、领用效率,提升物资管理效率和维保效率,为线路的安全高效运行提供保障.

关键词：城市轨道交通无场段物资仓储

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绿色生物质灰催化剂用于合成生物柴油

石油学报（石油加工） 2018年第1期34卷 78-85页

作者：李川胡献国合肥工业大学机械工程学院安徽合肥230009

以雪松灰为原料,采用一次煅烧-水化-二次煅烧的方法制备了雪松灰催化剂(绿色生物质灰催化剂),借助电感耦合等离子体质谱仪、同步热分析仪、X射线衍射仪、场发射扫描电子显微镜和Hammett指示剂法等手段对雪松灰催化剂进行了表征,考察了... 详细信息

以雪松灰为原料,采用一次煅烧-水化-二次煅烧的方法制备了雪松灰催化剂(绿色生物质灰催化剂),借助电感耦合等离子体质谱仪、同步热分析仪、X射线衍射仪、场发射扫描电子显微镜和Hammett指示剂法等手段对雪松灰催化剂进行了表征,考察了其在酯交换反应合成生物柴油中的催化性能。结果表明,雪松灰催化剂的活性物种为CaO,碱强度为9.8

关键词：生物柴油生物质灰催化剂酯交换反应

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球磨细化二硫化钼粉末的试验研究

润滑与密封 1999年第2期24卷 47-49页

作者：胡献国合肥工业大学摩擦学研究所 230009

本文报道了利用球磨工艺获得超细二硫化钼粉末的方法.通过改变球磨的介质、球料比和其它一些球磨工艺条件,制取了平均费氏粒径值达0.54μm的二硫化钼粉末.利用四球摩擦磨损试验机考察了二硫化钼的粒度大小和添加量对润滑脂摩擦学特性的... 详细信息

本文报道了利用球磨工艺获得超细二硫化钼粉末的方法.通过改变球磨的介质、球料比和其它一些球磨工艺条件,制取了平均费氏粒径值达0.54μm的二硫化钼粉末.利用四球摩擦磨损试验机考察了二硫化钼的粒度大小和添加量对润滑脂摩擦学特性的影响.

关键词：二硫化钼粉末细化球磨试验研究润滑剂

环-块摩擦副条件下纳米二硫化钼的摩擦学性能

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润滑与密封 2006年第2期31卷 108-109,112页

作者：沃恒洲胡献国陈刚解放军炮兵学院安徽合肥230031 合肥工业大学安徽合肥230009

由硫化钠和钼酸钠水溶液反应生成三硫化钼沉淀，将三硫化钼脱硫，制得了粒径为20-30nm的纳米MoS2颗粒。利用MM-200摩擦磨损实验机测定了纳米MoS2作为N46机械油添加剂的摩擦学性能。结果表明，纳米二硫化钼比普通二硫化钼具有更好的抗磨... 详细信息

由硫化钠和钼酸钠水溶液反应生成三硫化钼沉淀，将三硫化钼脱硫，制得了粒径为20-30nm的纳米MoS2颗粒。利用MM-200摩擦磨损实验机测定了纳米MoS2作为N46机械油添加剂的摩擦学性能。结果表明，纳米二硫化钼比普通二硫化钼具有更好的抗磨性能。其机制为纳米二硫化钼比普通二硫化钼更容易发生摩擦化学反应，形成了富含硫和钼的润滑膜，而起抗磨作用。

关键词： MoS2 纳米颗粒摩擦学特性