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Laboratory Evaluation of Performance Recovery of Aged SBS-modified Asphalt Using Regenerants with Different Base Oil Components
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作者 Li Hongzhen Li Shengbin +3 位作者 Feng Zhuangzhuang Jiang Mengmeng Li Ning Dong Fuqiang 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS CSCD 2024年第2期98-107,共10页
In this study,the regenerative effects of different regenerants on aged SBS-modified asphalt from different perspectives were investigated,including their conventional properties,viscoelastic behavior,creep-related pr... In this study,the regenerative effects of different regenerants on aged SBS-modified asphalt from different perspectives were investigated,including their conventional properties,viscoelastic behavior,creep-related properties,and micromorphology.Base oils composed of different proportions of aromatic and saturated hydrocarbons as well as the styrene-butadiene-styrene(SBS)restorer were used to prepare the regenerants.The results showed that the components of the base oil of the regenerant played a crucial role in determining the characteristics and performance of the recycled SBSmodified asphalt.Regenerants containing a high proportion of aromatics dissolved the hard segment in the SBS restorer,thereby delaying the effect of a reduction in the regenerants on the performance of the aged asphalts at a high temperature.Regenerants containing a high proportion of saturates dissolved the soft segment in the SBS restorer to enhance the lowtemperature performance of the recycled asphalts.In addition,the stress sensitivity of the recycled asphalts increased with the fraction of aromatics in the regenerant.As the aromatic content of the base oil components of the regenerants increased and their saturate content decreased,the state of dispersion of the SBS phase in the recycled SBS-modified asphalts improved.The optimal content of aromatics in the base oil of the regenerants should be set in the range of 33%to 47%to ensure the adequate performance of the recycled asphalts and a high efficiency of the SBS restorer. 展开更多
关键词 aged SBS-modified asphalt regeneration mechanisms base oil rheological properties MORPHOLOGY
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Simulation of Solvent Extraction for Naphthenic Lubricating Base Oils
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作者 Xu Xiaoling Wang Tianqi +1 位作者 Tian Qingmei Liu Yansheng 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS CSCD 2023年第3期153-164,共12页
Solvent extraction is the process of separating aromatics from vacuum distillates for the production oflubricating base oils. In this study, the authors use dimethyl sulfoxide (DMSO) instead of furfural as solvent, in... Solvent extraction is the process of separating aromatics from vacuum distillates for the production oflubricating base oils. In this study, the authors use dimethyl sulfoxide (DMSO) instead of furfural as solvent, in light of itshigher selectivity, to obtain extracts with a high aromatic content for naphthenic lubricating base oils. We systematicallyinvestigated effects of the solvent-to-oil (S/O) ratio and extraction temperature on the yield of the extract, efficiency ofaromatic removal, and composition of the extracts and raffinates. The results showed that the aromatic content of extractsfor naphthenic oils could reach a high value of about 80%. The solvent maintained a high selectivity for aromatics fornaphthenic oils even under a high S/O ratio and a high extraction temperature. Moreover, the efficiency of aromatic removalfor naphthenic lubricating base oils could be enhanced by increasing either the S/O ratio or the extraction temperature,although these measures had limited effects in practice. Following this, we used the non-random two-liquid (NRTL) modelbased on the pseudo-component approach to simulate the liquid-liquid equilibrium of the system of DMSO + naphtheniclubricating base oils, and determined the parameters of binary interaction through regression based on the data on phaseequilibrium. The modeling results showed that the predicted yield, content of the solvent, and composition of the raffinatesand extracts were in good agreement with those obtained in the experiments. This validates the reliability of the model usedto represent the DMSO + naphthenic lubricating base oil system. Both the experimental data and the method of simulationreported here can help optimize the extraction of naphthenic lubricating base oils, and provide a better understanding of thecorresponding process. 展开更多
关键词 solvent extraction naphthenic lubricating base oils liquid-liquid equilibrium thermodynamic model DMSO
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Thermal oxidation of two aviation synthetic lubricant base oils 被引量:3
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作者 费逸伟 郭峰 +2 位作者 姚婷 杨宏伟 程治升 《Journal of Measurement Science and Instrumentation》 CAS CSCD 2015年第4期396-404,共9页
The thermal degradation of two synthetic lubricants base oils, poly-a-olefins (PAO) and di-esters (DE), was investigated under oxidative pyrolysis condition and their properties were characterized in simulated "a... The thermal degradation of two synthetic lubricants base oils, poly-a-olefins (PAO) and di-esters (DE), was investigated under oxidative pyrolysis condition and their properties were characterized in simulated "areo-engine" by comparing the thermal stability and identifying the products of thermal decomposition as a function of exposure temperature. The characterization of the products were performed by means of Fourier transform infrared spectrometry (FTIR), gas chromatography/mass spectrometry (GC/MS) and viscosity experiments. The results show that PAO has the lower thermal stability, being degraded at 200℃ different from 300 ℃ for DE. Several by-products are identified during the thermal degradation of two lubricant base oils. The majority of PAO products consist of alkenes and olefins, while more oxygen-contained organic compounds are detected in DE samples based on GC/MS analysis. The related reaction mechanisms are discussed based on the experimental results. 展开更多
关键词 synthetic aviation lubricant base oils thermal stability oxidative pyrolysis GC/MS analysis viscosity degradation
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The Influence of Paraffinic Base Oil on Low-temperature Viscosity of Naphthenic Base Oil 被引量:2
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作者 Liu Shuzhen Fu Hongrui 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2010年第1期34-37,共4页
Low-temperature viscosity of lube oils mixed with paraffinic base oil and naphthenic base oil at different mass ratios has been tested by experiments. The influence of paraffinic base oil on the performance of naphthe... Low-temperature viscosity of lube oils mixed with paraffinic base oil and naphthenic base oil at different mass ratios has been tested by experiments. The influence of paraffinic base oil on the performance of naphthenic base oil was investigated by studying the low-temperature viscosity of tested oils. The viscosity of lube oils increased with an increasing content of high-viscosity paraffinic base oil in the oil mixture. And the low-temperature viscosity was less influenced when the content of paraffinic base oil in the mixture was insignificant. In order to reduce the cost for formulating lubricating oil, a small fraction of paraffinic base oil can be added into naphthenic base oil as far as the property of lubricating oil can meet the specification. According to the study on low-temperature viscosity of the oil mixed with paraffinic base oil and naphthenic base oil, a basic rule was worked out for the preparation of qualified lubricating oils. 展开更多
关键词 paraffinic base oil naphthenic base oil low-temperature viscosity lubricating oil
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Hydrocracking diversity in n-dodecane isomerization on Pt/ZSM-22 and Pt/ZSM-23 catalysts and their catalytic performance for hydrodewaxing of lube base oil 被引量:6
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作者 Shan-Bin Gao Zhen Zhao +8 位作者 Xue-Feng Lu Ke-Bin Chi Ai-Jun Duan Yan-Feng Liu Xiang-Bin Meng Ming-Wei Tan Hong-Yue Yu Yu-Ge Shen Meng-Chen Li 《Petroleum Science》 SCIE CAS CSCD 2020年第6期1752-1763,共12页
Nobel metallic Pt/ZSM-22 and Pt/ZSM-23 catalysts were prepared for hydroisomerization of normal dodecane and hydrodewaxing of heavy waxy lube base oil.The hydroisomerization performance of n-dodecane indicated that th... Nobel metallic Pt/ZSM-22 and Pt/ZSM-23 catalysts were prepared for hydroisomerization of normal dodecane and hydrodewaxing of heavy waxy lube base oil.The hydroisomerization performance of n-dodecane indicated that the Pt/ZSM-23 catalyst preferred to crack the C-C bond near the middle of n-dodecane chain,while the Pt/ZSM-22 catalyst was favorable for breaking the carbon chain near the end of n-dodecane.As a result,more than 2%of light products(gas plus naphtha)and3%more of heavy lube base oil with low-pour point and high viscosity index were produced on Pt/ZSM-22 than those on Pt/ZSM-23 while using the heavy waxy vacuum distillate oil as feedstock. 展开更多
关键词 ISOMERIZATION HYDROCRACKING CATALYSTS Pt/ZSM-22 Pt/ZSM-23 DODECANE Lube base oil
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Production of Quality Hydrogenated Base Oils through Isodewaxing Technology 被引量:2
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作者 Cao Wenlei 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2005年第4期25-35,共11页
This article presents the successful experience in adopting the Isodewaxing technology in the lube oil unit of Shanghai Gaoqiao refinery. In line with the demand of different crude slate for different reaction depth, ... This article presents the successful experience in adopting the Isodewaxing technology in the lube oil unit of Shanghai Gaoqiao refinery. In line with the demand of different crude slate for different reaction depth, and good match between the optimal product quality and the yield, the refinery has make strenuous efforts to optimize the operation and reduce the energy consumption to manufacture high-quality hydrogenated base stocks. 展开更多
关键词 HYDROCRACKING ISODEWAXING lube oil base oils
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Coal Tar Derived Metallocene Catalyst for Polymerization of 1-Decene into Low-viscosity Poly-α-Olefin Lubricating Base Oil 被引量:1
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作者 Wang Jiannan Liu Man +2 位作者 Chen Yilong Mohamed Abbas Chen Jiangang 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2022年第3期52-60,共9页
The production of poly-α-olefins(PAOs)has attracted attention due to their excellent viscosity-temperature dependence,wear characteristics,oxidative properties,and high thermal stability.In this study,indene extracte... The production of poly-α-olefins(PAOs)has attracted attention due to their excellent viscosity-temperature dependence,wear characteristics,oxidative properties,and high thermal stability.In this study,indene extracted during coal tar refining was used as a raw material to synthesize a bis(indenyl)zirconium dichloride metallocene catalyst.A PAO with low viscosity and a high viscosity index was produced via the oligomerization of 1-decene in the presence of both the prepared metallocene and a methylaluminoxane(MAO)co-catalyst.Notably,the effects of different synthesis reaction parameters,such as Al:Zr ratio,amount of catalyst,and reaction temperature,on the conversion ratio and product selectivity were investigated in detail.The produced PAO was thoroughly characterized using Fourier-transform infrared,^(13)C,and^(1)H nuclear magnetic resonance spectroscopies;gas chromatography;and viscosity measurements.At 70℃,the metallocene catalyst created more stable active sites.In addition,the alkylation effect of MAO was noticeable.Interestingly,the obtained catalysis results demonstrated that a high conversion ratio of~93%was achieved at a low reaction temperature of 70℃,with a catalyst dosage of 0.0848 mmol and Al:Zr ratio of 8.48mmol:0.0848mmol.Moreover,under these optimal conditions,the kinematic viscosity of PAO was 4.25 mm2/s at 100℃,and the viscosity index was 139,indicating good viscosity-temperature properties. 展开更多
关键词 lubricant base oil poly-α-olefin coal tar metallocene catalyst POLYMERIZATION
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Influence of Different Hydrocarbon Molecules on Physical Properties of Mineral Base Oils 被引量:1
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作者 Wang Weijun Long Jun +3 位作者 He Yifeng Sun Hongwei Tian Songbai Zheng Hui 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2017年第1期33-45,共13页
Different kinds of base oils with different viscosity were analyzed in this paper, including eight mineral base oils, alkylnaphthalene and three synthetic PAO oils. The influence of different hydrocarbon molecules on ... Different kinds of base oils with different viscosity were analyzed in this paper, including eight mineral base oils, alkylnaphthalene and three synthetic PAO oils. The influence of different hydrocarbon molecules on physical properties of mineral base oils was investigated, such as density(d), kinematic viscosity(KV), viscosity index(VI), etc. Possible reasons for some inconsistent phenomena in data processing were also theoretically analyzed in detail. The refractive indexes(RI), d and molecular weight(M) decrease linearly with the increase of paraffinic content other than KV, which declines exponentially. There are no clear relationships between physical properties of base oils and naphthenic content while polycyclic alkanes show a strong correlation with M and KV. The influence of aromatics on physical properties of base oils is just the opposite of paraffin's. VI of the base oils with low aromatics content increases linearly as their paraffinic contents rise when their carbon numbers are approximately equal. However, base oils with high aromatics content follow an utterly different rule, in which VI declines dramatically linearly with the increase in polycyclic aromatic content, which is the essential reason why naphthenic base oils all have terrible viscosity-temperature characteristics while paraffinic base oils usually do not. 展开更多
关键词 base oil hydrocarbon molecule physical property
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Modification of methyl oleate for silicon-based biological lubricating base oil 被引量:1
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作者 Shixing Cui Zhi Yun Xia Gui 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2017年第1期130-136,共7页
A new kind of silicon-based biological lubricating base oil with good viscosity-temperature behavior,viscosity index,thermostability,oxidation stability and wear resistance performance was synthesized as a derivative ... A new kind of silicon-based biological lubricating base oil with good viscosity-temperature behavior,viscosity index,thermostability,oxidation stability and wear resistance performance was synthesized as a derivative of methyl oleate.Trimethylsilylation reaction was introduced to further improve methyl oleate oxidation stability and lubricity after epoxidation and open-ring reactions.The order of effectiveness of acid binding agent was N,N-diisopropylethylamine(DIEA) > pyridine > diethylamine > triethylamine,and the effects of various parameters on the trimethylsilylation reaction as well as on the silicon-oxygen bond stability and reaction yield were studied.A maximum yield of 34.54%was achieved at hydroxyl/trimethyl chlorosilane/DIEA molar ratio of1:1.25:1,reaction temperature 40℃,reaction time 1.5 h. 展开更多
关键词 Methyl oleate Trimethyl chlorosilane Acid binding agent N N-diisopropylethylamine Lubricity Silicon-based biological lubricating base oil
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Inverse Gas Chromatographic Study of the Oxidation Stability of Lubricating Base Oils via Solubility Parameter Calculations 被引量:2
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作者 MOUSTAFA Nagy Emam EISSA Elham Ahmed 《色谱》 CAS CSCD 北大核心 2007年第6期871-875,共5页
The Flory-Huggins interaction parameter(χ1,2∞) and solubility parameter(δ2) and its hydrogen bonding sensing component(δh) were determined using inverse gas chromatography(IGC).These parameters were successfully u... The Flory-Huggins interaction parameter(χ1,2∞) and solubility parameter(δ2) and its hydrogen bonding sensing component(δh) were determined using inverse gas chromatography(IGC).These parameters were successfully used in the probes of chemical changes that occur during the oxidation of naphthenic and paraffinic base oils in a GC column.Changes in χ1,2∞ values reflect the different types of intermolecular interactions(dispersive,polar,hydrogen bonding) of the given lubricating base oil during oxidation.The obtained results showed that δh component of solubility parameter is the most important parameter for probing the oxidative-chemical changes during the oxidation of given lubricating oils. 展开更多
关键词 反相气相色谱 氧化稳定性 润滑原油 溶解参数 计算
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The Role of Diesel Soot in the Tribological Behavior of 150SN Base Oil 被引量:2
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作者 Su Peng Xiong Yun +3 位作者 Liu Xiao Yang He Fan Linjun Liu Ping 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2017年第2期89-95,共7页
The diesel soot was collected from diesel engine exhaust pipe. The morphology and structure of the collected diesel soot was characterized by HRTEM, XRD and XPS and its tribological behavior was investigated by a SRV ... The diesel soot was collected from diesel engine exhaust pipe. The morphology and structure of the collected diesel soot was characterized by HRTEM, XRD and XPS and its tribological behavior was investigated by a SRV IV oscillating reciprocating friction and wear tester. Test results showed that the tribological behavior of diesel soot was largely influenced by the test load. Under a low load, the diesel soot could reduce the wear volume of the disc. While under a high load, the diesel soot could reduce the friction coefficient of base oil. Based on the characterization of the worn scars by the SEM technique, the 3D surface profiler and the Raman spectroscopy, it was assumed that the core-shell structure of diesel soot with several graphitic layers played important roles. On one hand, its spherical and special structure could make it roll between friction pairs to reduce wear under a low load. On the other hand, its outer-shell graphite layers could be peeled off to form lubrication film to reduce friction under a high load and shear force. 展开更多
关键词 DIESEL SOOT TRIBOLOGICAL behavior CORE-SHELL structure 150SN base oil
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Interaction of Chloroprene and Nitrile-Butadiene Rubber with Lubricating Greases and Base Oils 被引量:1
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作者 Gunnar Stang Linda Salomonsson Boris Zhmud 《润滑油》 CAS 2006年第3期54-60,共7页
The present communication addresses compatibility of two synthetic rubber types,chloroprene and nitrile-butadiene ones,with a number of base oils of petroleum origin and lubricating greases produced thereof.Four base ... The present communication addresses compatibility of two synthetic rubber types,chloroprene and nitrile-butadiene ones,with a number of base oils of petroleum origin and lubricating greases produced thereof.Four base oils,including three naphthenic products with varying degrees of refining and one paraffinic product,were compared with each other in terms of their effect on the rubbers.Degenerative changes occurring in the rubbers on contact with the oils and greases were studied using accelerated ageing tests.Alterations in rubber parameters,such as hardness,weight and glass transition temperature,caused by interaction with oil were monitored.The main physicochemical mechanisms standing behind the changes observed in the rubber properties were found to be(i) migration of plasticizer from rubber into the oil phase,(ii) absorption of oil by rubber,and(iii) oxidation of rubber.An increase in glass transition temperature(Tg) of rubber aged in a base oil or grease was considered as an indirect indication that the plasticizer had migrated out of rubber;the plasticizer accumulation in the oil phase being directly confirmed by gas chromatography.In order to suppress the plasticizer migration,oil additivation with dioctyl adipate(DOA),a common plasticizer used in rubber formulations,was attempted.However,the DOA-additivated oils,while reducing plasticizer migration,were found to cause more swelling than the original oils in the case of chloroprene rubber.As an alternative,replacement of DOA by an alkylated aryl phosphate in nitrile-butadiene rubber formulations was considered,but it did not solve the problem either.The results of this study suggest conclusively that the type of rubber,the plasticizer,and the base oil are all the crucial parameters that should be considered when matching rubber with oil in real-life applications.Interaction of rubber with base oils and with greases produced thereof is largely controlled by(i) solvency of the base oils and(ii) polarity and cross-linking density of the rubber matrix.Higher temperatures accelerate ageing in all cases. 展开更多
关键词 环烷基油 橡胶相容性 溶解能力 油脂 基油
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Prediction of Lubricant Physicochemical Properties Based on Gaussian Copula Data Expansion
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作者 Feng Xin Yang Rui +1 位作者 Xie Peiyuan Xia Yanqiu 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS CSCD 2024年第1期161-174,共14页
The composition of base oils affects the performance of lubricants made from them.This paper proposes a hybrid model based on gradient-boosted decision tree(GBDT)to analyze the effect of different ratios of KN4010,PAO... The composition of base oils affects the performance of lubricants made from them.This paper proposes a hybrid model based on gradient-boosted decision tree(GBDT)to analyze the effect of different ratios of KN4010,PAO40,and PriEco3000 component in a composite base oil system on the performance of lubricants.The study was conducted under small laboratory sample conditions,and a data expansion method using the Gaussian Copula function was proposed to improve the prediction ability of the hybrid model.The study also compared four optimization algorithms,sticky mushroom algorithm(SMA),genetic algorithm(GA),whale optimization algorithm(WOA),and seagull optimization algorithm(SOA),to predict the kinematic viscosity at 40℃,kinematic viscosity at 100℃,viscosity index,and oxidation induction time performance of the lubricant.The results showed that the Gaussian Copula function data expansion method improved the prediction ability of the hybrid model in the case of small samples.The SOA-GBDT hybrid model had the fastest convergence speed for the samples and the best prediction effect,with determination coefficients(R^(2))for the four indicators of lubricants reaching 0.98,0.99,0.96 and 0.96,respectively.Thus,this model can significantly reduce the model’s prediction error and has good prediction ability. 展开更多
关键词 base oil data augmentation machine learning performance prediction seagull algorithm
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Oil Saturation Is Determined by Different Experimental Methods
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作者 Bigong Jia Xiaolong Liu 《Journal of Geoscience and Environment Protection》 2024年第6期81-89,共9页
Oil saturation was an important parameter of reservoir evaluation, which had important guiding significance for oilfield development. In this paper, the oil saturation of tight oil in G area was studied, and the origi... Oil saturation was an important parameter of reservoir evaluation, which had important guiding significance for oilfield development. In this paper, the oil saturation of tight oil in G area was studied, and the original oil saturation of the study area was studied by using the comprehensive experimental method. The original oil saturation of tight oil in the study area was determined by J function method, rock electricity method and oil-based mud coring method. The results showed that through the comparison of three experimental methods, it could be concluded that the J function method leads to the low value of oil saturation in the study area. The oil-based mud coring method was more suitable for the determination of oil saturation in this area than the other two methods because it needs to meet too many conditions and the calculation results were also low. G area was located in Qili Village, Ordos Basin. 展开更多
关键词 oil Saturation J Function Archie Formula oil-based Mud Coring
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Grinding temperature and energy ratio coefficient in MQL grinding of high-temperature nickel-base alloy by using different vegetable oils as base oil 被引量:25
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作者 Li Benkai Li Changhe +3 位作者 Zhang Yanbin Wang Yaogang Jia Dongzhou Yang Min 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2016年第4期1084-1095,共12页
Vegetable oil can be used as a base oil in minimal quantity of lubrication (MQL). This study compared the performances of MQL grinding by using castor oil, soybean oil, rapeseed oil, corn oil, sunflower oil, peanut oi... Vegetable oil can be used as a base oil in minimal quantity of lubrication (MQL). This study compared the performances of MQL grinding by using castor oil, soybean oil, rapeseed oil, corn oil, sunflower oil, peanut oil, and palm oil as base oils. A K-P36 numerical-control precision surface grinder was used to perform plain grinding on a workpiece material with a high-temperature nickel base alloy. A YDM-III 99 three-dimensional dynamometer was used to measure grinding force, and a clip-type thermocouple was used to determine grinding temperature. The grinding force, grinding temperature, and energy ratio coefficient of MQL grinding were compared among the seven vegetable oil types. Results revealed that (1) castor oil-based MQL grinding yields the lowest grinding force but exhibits the highest grinding temperature and energy ratio coefficient; (2) palm oil-based MQL grinding generates the second lowest grinding force but shows the lowest grinding temperature and energy ratio coefficient; (3) MQL grinding based on the five other vegetable oils produces similar grinding forces, grinding temperatures, and energy ratio coefficients, with values ranging between those of castor oil and palm oil; (4) viscosity significantly influences grinding force and grinding temperature to a greater extent than fatty acid varieties and contents in vegetable oils; (5) although more viscous vegetable oil exhibits greater lubrication and significantly lower grinding force than less viscous vegetable oil, high viscosity reduces the heat exchange capability of vegetable oil and thus yields a high grinding temperature; (6) saturated fatty acid is a more efficient lubricant than unsaturated fatty acid; and (7) a short carbon chain transfers heat more effectively than a long carbon chain. Palm oil is the optimum base oil of MQL grinding, and this base oil yields 26.98 N tangential grinding force, 87.10 N normal grinding force, 119.6 degrees C grinding temperature, and 42.7% energy ratio coefficient. (C) 2015 The Authors. Production and hosting by Elsevier Ltd. on behalf of Chinese Society of Aeronautics and Astronautics. 展开更多
关键词 base oil Carbon chain length Energy ratio coefficient Grinding force Grinding temperature MQL grinding Vegetable oil VISCOSITY
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Tribological Properties of Few-layer Graphene Oxide Sheets as Oil-Based Lubricant Additives 被引量:10
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作者 CHEN Zhe LIU Yuhong LUO Jianbin 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2016年第2期439-444,共6页
The performance of a lubricant largely depends on the additives it involves. However, currently used additives cause severe pollution if they are burned and exhausted. Therefore, it is necessary to develop a new gener... The performance of a lubricant largely depends on the additives it involves. However, currently used additives cause severe pollution if they are burned and exhausted. Therefore, it is necessary to develop a new generation of green additives. Graphene oxide(GO) consists of only C, H and O and thus is considered to be environmentally friendly. So the tribological properties of the few-layer GO sheet as an additive in hydrocarbon base oil are investigated systematically. It is found that, with the addition of GO sheets, both the coefficient of friction(COF) and wear are decreased and the working temperature range of the lubricant is expanded in the positive direction. Moreover, GO sheets has better performance under higher sliding speed and the optimized concentration of GO sheets is determined to be 0.5wt%. After rubbing, GO is detected on the wear scars through Raman spectroscopy. And it is believed that, during the rubbing, GO sheets adhere to the sliding surfaces, behaving like protective films and preventing the sliding surfaces from contacting with each other directly. This paper proves that the GO sheet is an effective lubricant additive, illuminates the lubrication mechanism, and provides some critical parameters for the practical application of GO sheets in lubrication. 展开更多
关键词 tribological properties graphene oxide sheets lubricant additive hydrocarbon base oil
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Preparation and Characterization of Multiester Derivative from Plant Oil as Base Stock for Biolubricants
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作者 Li Xiong Chen Ligong 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2020年第2期122-128,共7页
As an alternative to petroleum-based lubricants, which are harmful to the environment in excessive amounts, a biodegradable multiester derivative(OFANE) was obtained from plant oil through a chemical modification proc... As an alternative to petroleum-based lubricants, which are harmful to the environment in excessive amounts, a biodegradable multiester derivative(OFANE) was obtained from plant oil through a chemical modification process with four steps as follows: hydrolysis, esterification, epoxidation, and ring-opening reaction. The physical and chemical properties of OFANE, such as viscosity, acid value, pour point, evaporation loss, and oxidation induction time were measured. Results showed that OFANE had good low-temperature fluidity, thermal-oxidative stability, and tribological properties. The tribological properties of OFANE with dimeric acid additive were evaluated. The final biodegradation experiment indicated that OFANE had excellent biodegradability. The prepared OFANE showed great potential as substitute for petroleum-based lubricating base oils. 展开更多
关键词 plant oil multiester derivative lubricant base oil physicochemical property tribological property
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Reviews on Transformer Oil-based Nanofluids 被引量:11
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作者 Miao Jin Dong Ming +2 位作者 Wu Xuezhou Shen Liangping Wang Hao 《中国电机工程学报》 EI CSCD 北大核心 2013年第9期I0019-I0019,共1页
目前纳米改性变压器油由于其高散热性和独特的电气性能,正受到越来越广泛的关注。以近年来纳米改性变压器油的相关研究成果为基础,分析了纳米改性变压器油在导热、击穿、老化、抗水分影响以及改性油-纸相互作用等方面的特点,并介绍了目... 目前纳米改性变压器油由于其高散热性和独特的电气性能,正受到越来越广泛的关注。以近年来纳米改性变压器油的相关研究成果为基础,分析了纳米改性变压器油在导热、击穿、老化、抗水分影响以及改性油-纸相互作用等方面的特点,并介绍了目前常用的3种用于解释绝缘油介质中纳米颗粒改性机理的理论模型,最后提出了纳米改性变压器油领域后续研究需要关注的问题,即纳米颗粒材料体系的选择、高稳定性改性变压器油的制备工艺以及纳米颗粒对变压器油的改性机理。 展开更多
关键词 变压器 纳米流体 评论 电气设备 绝缘系统 电压电平 电感器 电抗器
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Gas-hydrate formation,agglomeration and inhibition in oil-based drilling fluids for deep-water drilling 被引量:9
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作者 Fulong Ning Ling Zhang +2 位作者 YunzhongTu Guosheng Jiang Maoyong Shi 《Journal of Natural Gas Chemistry》 EI CAS CSCD 2010年第3期234-240,共7页
One of the main challenges in deep-water drilling is gas-hydrate plugs,which make the drilling unsafe.Some oil-based drilling fluids(OBDF) that would be used for deep-water drilling in the South China Sea were teste... One of the main challenges in deep-water drilling is gas-hydrate plugs,which make the drilling unsafe.Some oil-based drilling fluids(OBDF) that would be used for deep-water drilling in the South China Sea were tested to investigate the characteristics of gas-hydrate formation,agglomeration and inhibition by an experimental system under the temperature of 4 ?C and pressure of 20 MPa,which would be similar to the case of 2000 m water depth.The results validate the hydrate shell formation model and show that the water cut can greatly influence hydrate formation and agglomeration behaviors in the OBDF.The oleophobic effect enhanced by hydrate shell formation which weakens or destroys the interfacial films effect and the hydrophilic effect are the dominant agglomeration mechanism of hydrate particles.The formation of gas hydrates in OBDF is easier and quicker than in water-based drilling fluids in deep-water conditions of low temperature and high pressure because the former is a W/O dispersive emulsion which means much more gas-water interfaces and nucleation sites than the later.Higher ethylene glycol concentrations can inhibit the formation of gas hydrates and to some extent also act as an anti-agglomerant to inhibit hydrates agglomeration in the OBDF. 展开更多
关键词 oil-based drilling fluids gas hydrates water cut formation and agglomeration INHIBITOR
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Synthesis of melamine-formaldehyde microcapsules containing oil-based fragrances via intermediate polyacrylate bridging layers 被引量:3
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作者 Yanping He Shunzhi Yao +5 位作者 JunzhengHao HongWang Linhua Zhu TianSi Yanlin Sun Jianhao Lin 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2019年第10期2574-2580,共7页
A general and versatile strategy to prepare melamine-formaldehyde(MF)microcapsules encapsulating oil-based fragrances by combining solvent evaporation and in situ polymerization was proposed in this work.The oil-based... A general and versatile strategy to prepare melamine-formaldehyde(MF)microcapsules encapsulating oil-based fragrances by combining solvent evaporation and in situ polymerization was proposed in this work.The oil-based fragrance was pre-encapsulated by an inner polyacrylate membrane via solvent evaporation,followed by in situ polymerization of MF precondensates as an outer shell.The polyacrylate membrane is used as an intermediate bridging layer to stabilize the oil-based fragrance,and to provide driving forces for in situ polymerization of MF precondensates through electrostatic attractions between carboxyl groups and ammonium ions.It was demonstrated that MF microcapsules containing clove oil were prepared successfully.The amount and the composition of the intermediate polyacrylate bridging layer were critical.Smooth and sphere-shaped MF-clove oil microcapsules were prepared when the weight ratio of polyacrylate to clove oil was over 60 wt%and the concentration of acrylic acid(AA)increased to 10 wt%in polyacrylate.In addition,MF microcapsules containing sunflower oil and hexyl salicylate were prepared by using this method.The work suggests that this new approach can be potentially used to encapsulate various core materials,tuning the shell properties of microcapsules such as thickness,mechanical strength and release properties. 展开更多
关键词 Melamine formaldehyde MICROCAPSULE oil-baseD FRAGRANCE Particle Polymers Synthesis
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