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Preparation and tribological properties of lanthanum-doped TiO_2 nanoparticles in rapeseed oil

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Journal of Rare Earths 2013年第6期31卷 589-594页

作者：谷科城陈波水陈勇 Department of oil Application & Management Engineering Logistical Engineering University Department of Barracks Management & Environmental Engineering Logistical Engineering University

Oleic acid （denoted as OA） surface-capped lanthanum-doped titanium dioxide composite nanoparticles, abbreviated as OA/La-TiO2, were prepared via sol-gel method in association with surface modification by oleic acid. The microstructure of as-prepared OA/La-TiO2 was characterized by means of X-ray diffraction, scanning electron microscopy and Fourier transform infrared spectrometry, and their thermal stability was evaluated by thermogravimetry and differential scanning calorimetry. Moreover, the tribological properties of OA/La-TiO2 as lubricant additives in rapeseed oil were evaluated with a four-ball friction and wear tester. The morphology as well as elemental composition and chemical characteristics of worn steel surfaces was investigated by scanning electron microscopy, energy dispersive X-ray spectrometry and X-ray photoelectron spectroscopy. Results showed that as-prepared OA/La-TiO2 particles were of spherical shape and had an average diameter of 20 nm. In the meantime, OA/La-TiO2 particles doped with 1.5% （molar ratio; the same hereafter） and 2.5% of lanthanum could markedly improve the anti-wear and friction-reducing capacities of rapeseed oil. This is attributed to the formation of a complex boundary lubrication film mainly composed of the oxides of iron, titanium and lanthanum as well as the formation of an adsorption film of oleic acid on steel sliding surfaces.

关键词： titanium dioxide lanthanum nanoparticle preparation rapeseed oil lubricant additive tribological properties rare earths

Preparation, friction and wear properties of hydrophobic lanthanum borate nanorods in rapeseed oil

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Transactions of Nonferrous Metals Society of China 2014年第11期24卷 3578-3584页

作者：谷科城陈波水王雪梅王九方建华吴江黄立川后勤工程学院油料应用与管理工程系重庆401311 后勤工程学院化学与材料工程系重庆401311 成都军区物资油料部成都610015

Oleic acid (denoted as OA) surface-caped lanthanum borate nanorods, abbreviated as OA/LaBO3·H2O, were prepared via hydrothermal method. The microstructures of the as-prepared OA/LaBO3·H2O nanorods were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. The friction and wear properties of OA/LaBO3·H2O nanorods in rapeseed oil were evaluated with a four-ball tribo-tester. The results show that the as-prepared OA/LaBO3·H2O nanorods are hydrophobic and display nanorods morphology with uniform diameter of about 50 nm and length of up to 500 nm. In the meantime, OA/LaBO3·H2O nanorods can obviously improve the anti-wear and friction-reducing capacities of rapeseed oil, and the optimal anti-wear and friction-reducing properties of rapeseed oil were obtained at an OA/LaBO3·H2O content of 1% (mass fraction).

关键词： lanthanum borate nanorod hydrophobicity preparation friction wear rapeseed oil

Sensitivity and Compatibility Analysis of Sulfur and Phosphorus Type Additives in rapeseed oil

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Journal of Wuhan University of Technology(Materials Science) 2004年第B10期19卷 41-44页

作者：马江波 Tsinghua University

The effects of sulfur type additives T321 and phosphorous type additives P120 on the EP and AW abilities of rapeseed oil were investigated by a four-ball testing machine using the rapeseed oil as base *** effect of T321 mixed with P120 on the tribochemical performance of the rapeseed oil was *** result shows that the load carrying,extreme pressure and abrasion capacities of lubricant film can be improved by adding T321 and P120 as additives in rapeseed oil, respectively. The SEDX analysis on the surface of steel balls reveals that tribochemical reactions occur during the friction process, the barrier lubricating film is formed containing triglyceride and the additives can improve the anti-wear ability and load-carrying capacity.

关键词： additive chemistry sustainable rapeseed oil tribochemical reactions tribology performance

Friction and Wear Performance of Magnesium Alloy against Steel under Lubrication of rapeseed oil with BN-containing Additive

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China Petroleum Processing & Petrochemical Technology 2011年第1期13卷 70-74页

作者： Fang Jianhua Chen Boshui Dong Ling Wu Jiang Wang Jiu College of Materials Science and Engineering Chongqing University Chongqing 400045 Department of Petrochemistry Logistical Engineering University Chongqing 401311

A BN-containing additive,the boron and nitrogen modified rapeseed oil (abbreviated as BNR),was prepared by chemical modification of rapeseed oil with boric and nitrous *** friction and wear performances of the AZ91D magnesium alloy against the GCr15 bearing steel under lubrication of rapeseed oil containing BNR were evaluated on a SRV *** topography and chemical species of the worn surfaces of magnesium alloy were analyzed by a scanning electron microscope (SEM) and an X-ray photoelectron spectroscope (XPS),*** test results indicated that the friction and wear of the magnesium alloy-steel tribomates could be effectively reduced by incorporating BNR into the rapeseed oil *** friction coefficients and the wear scars of magnesium alloy decreased with an increasing content of *** surface lubricated with the BNR-doped rapeseed oil demonstrated less wear as compared with that lubricated with neat rapeseed *** enhanced anti-wear and friction-reducing abilities of rapeseed oil provided by BNR in the lubrication of magnesium alloy against steel were ascribed to the formation of a composite boundary lubrication film due to the strong adsorption of BNR and rapeseed oil onto the lubricated surfaces and their tribochemical reactions with magnesium alloy.

关键词： friction and wear magnesium alloy BN-containing additive rapeseed oil

Tribological Behaviors of S,B-Containing Morpholine Derivatives as Additives in rapeseed oil

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China Petroleum Processing & Petrochemical Technology 2008年第4期10卷 58-62页

作者： Fan Chengkai Li Fenfang Sheng Liping School of Chemistry and Chemical Engineering Central South University Changsha 410083

Two novel ashless and non-phosphorus S, B-containing morpholine derivatives, MBOC and MBOD, were prepared and their tribological behaviors in rapeseed oil （RSO） were evaluated using a four-ball tester. Thermal degradation tests were conducted to identify their thermal stabilities using a thermo-gravimetric analyzer. The worn surfaces of the steel balls were investigated by scanning electron microscopy （SEM）. The results indicated that the additives possessed high thermal stabilities and good load-carrying capacities. Moreover, they both had good anti-wear and friction reducing property at a relatively high concentration （1.5 m%） and under all test loads. The results of XPS analyses illustrated that the prepared compounds as additives in RSO could form a protective film containing inorganic sulfide, sulfate, oxidized compounds and organic nitrogen-containing compounds on the metal surface during the sliding process.

关键词： morpholine derivatives tribological performances rapeseed oil

Tribological Behavior of Benzothiazoline Derivative as Additive in rapeseed oil

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China Petroleum Processing & Petrochemical Technology 2012年第1期14卷 56-60页

作者： Zeng Xiaojun Huang Fang Li Jianming JiangYinyan Base Department of Changsha Medical University Changsha 410219 China Quality Supervision ＆ Testing Center for Fireworks Liuyang 410300 Changsha Commerce and Tourism College Changsha 410004

A novel lubricating oil additive 3-((2-(2-hydroxyethyl)-1,3,2,6-dioxazaborocan-6-yloxy)methyl) benzo[d] thiazole-2(3H)-thione(BTD) was *** product was characterized by FTIR,elemental analysis,and thermogravimetric analysis(TGA).Four-ball tribological tests showed that the addition of a definite concentration of this additive to rapeseed oil could effectively increase both the load-carrying capacity,resistance to wear,and friction-reducing abilities of the *** electron microscopy(SEM) observations have confirmed that the additive could result in a reduced diameter of the wear scar.

关键词： BTD additive rapeseed oil tribological properties

Synthesis of Two Novel Additives and Study of Their Tribological Properties in rapeseed oil

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China Petroleum Processing & Petrochemical Technology 2007年第3期9卷 29-33页

作者： Zhou Maolin Li Fenfang Zeng Xiaojun Fan Chengkai School of Chemistry and Chemical Engineering Central South University Changsha 410083 China

Two novel ashless additives - benzothiazole derivatives containing boron and chlorine, OBC and BBC, were synthesized. The tribological performances of OBC and BBC at different mass ratios as additives in rapeseed oil （RO） were examined on a four-ball machine. The worn surfaces of the lower steel balls lubricated by oil samples were analyzed by means of scanning electron microscopy （SEM）. The test results showed that OBC and BBC had good solubility in the base oil, and could effectively increase the load-carrying capacity of the base oil. The maximum non-seizure load of oil sample containing 1.5 m% BBC was 1117 N, which was 2.3 times as much as that of the base oil. Both OBC and BBC could improve the anti-wear and corrosion inhibiting performance and thermal stability of the base oil, whose initial decomposition temperatures was above 350 ~C. However, OBC and BBC at different concentrations could increase the friction coefficient of the base oil. The SEM morphology of steel balls lubricated by oil samples containing 1.5 m% additives seemed to be more uniform and smoother than that of the base oil, and the scars formed were very shallow.

关键词： additives anti-wear friction reduction rapeseed oil benzothiazole derivatives

Synthesis of Biodiesel from rapeseed oil Using K_2O/γ-Al_2O_3 as Nano-Solid-Base Catalyst

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Wuhan University Journal of Natural Sciences 2009年第1期14卷 75-79页

作者： HAN Heyou GUAN Yanping College of Science Huazhong Agricultural University/State Key Laboratory of Agricultural Microbiology Wuhan 430070 Hubei China

Nano-solid-base catalyst K2O/γ-Al2O3 was prepared and adopted for the synthesis of biodiesel by transesterification of rapeseed oil with methanol. The particle diameter of the catalyst was about 50 nm, which was measured by transmission electron microscopy （TEM）. The variables affecting the yield of biodiesel during transesterification, such as mass ratio of KNO3 to γ-Al2O3, calcination temperature, calcination time, catalyst content, molar ratio of methanol to oil, reaction temperature and reaction time were investigated. The catalyst obtained by calcining a mixture of KNO3 and γ-Al2O3 （mKNO3/mγ-Al2O3 =70 %） at 600℃ for 3 h, was found to be the optimum one, which gave the highest catalytic activity in the reaction. With 3% （mcatalyst/moil） catalyst, when the transesterification was carried out at a molar ratio of methanol to oil of 12 ：：1, a reaction temperature of 70℃, and a reaction time of 3 h, yield of 94% was achieved.

关键词： nano-solid-base catalyst biodiesel rapeseed oil

Characterization of rapeseed oil Using FTIR-ATR Spectroscopy

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Journal of Food Science and Engineering 2014年第5期4卷 244-249页

作者： Lu Yuzhen Du Changwen Shao Yanqiu Zhou Jianmin The State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences Nanjing210008 China

Fourier transform infrared attenuated total reflectance （FTIR-ATR） spectroscopy was employed to characterize rapeseed oils. The spectral features of rapeseed oils were first investigated. Spectral data was processed using principal component analysis （PCA） and linear discriminant analysis （LDA） to discriminate the oils from three cultivars of rapeseeds. As a result, 100% discrimination accuracy was obtained by LDA. Furthermore, the applicability of FTIR-ATR spectroscopy to characterize the changes of rapeseed oils caused by thermal treatment was studied. The rapeseed oil at 60 ℃ was regularly subjected to spectral measurement, and the spectral changes induced by thermal treatment were analyzed and discussed. This study had demonstrated the good performance of FTIR-ATR spectroscopy in characterizing rapeseed oils.

关键词： rapeseed oil FTIR-ATR characterization.