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China Petroleum Processing & Petrochemical Technology 2018年第2期20卷 79-89页

作者： Xiong Sang sun jianlin College of Materials Engineering Nanjing Institute of TechnologyNanjing 211167 Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology Nanjing 211167 School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083

The contact angle phenomena and wetting behavior of fatty acids,alcohols and ester used as additives in lubricants onto the rolled copper foil(RCF)surface were studied by the static sessile drop ***-empirical quantum-chemical method studies on the contact angle of these compounds onto surface using several structural parameters were carried *** refractivity as well as several structural parameters were adopted in the development of quantitative structure-property relationships(QSPR)using genetic function approximation(GFA)statistical analysis *** results show that quantum parameters are a better choice when predicting the contact angle and wettability of lubricants onto the RCF *** angle of the compounds serves as a function of their viscosity,interfacial tension,and physicochemical *** P,molecular refractivity,molecular flexibility,total molecular mass,solvent surface area,element count,total energy and dipole are the most sensitive ones among the major contributing ***,studies of lubricants on the RCF surfaces allow wetting theories to be tested down to the microcosmic scale,which can bring about new insight to predict wettability of lubricants onto RCF surface.

关键词： lubricants wetting contact angle modelling QSPR

Achieving oxidation protection effect for strips hot rolling via Al_(2)O_(3) nanofluid lubrication

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International Journal of Minerals,Metallurgy and Materials 2023年第5期30卷 908-916页

作者： jianlin sun Boyuan Huang Jiaqi He Erchao Meng Qianhao Chang School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China

It was discovered the application of Al_(2)O_(3) nanofluid as lubricant for steel hot rolling could synchronously achieve oxidation protection of strips *** underlying mechanism was investigated through hot rolling tests and molecular dynamics (MD) *** employment of Al_(2)O_(3) nanoparticles contributed to significant enhancement in the lubrication performance of *** rolled strip exhibited the best surface topography that the roughness reached lowest with the sparsest surface ***,the oxide scale generated on steel surface was also thinner,and the ratio of Fe_(2)O_(3) among various iron oxides became *** was revealed the above oxidation protection effect of Al_(2)O_(3) nanofluid was attributed to the deposition of nanoparticles on metal surface during hot rolling.A protective layer in the thickness of about 193 nm was formed to prevent the direct contact between steel matrix and atmosphere,which was mainly composed of Al_(2)O_(3) and sintered organic *** simulations confirmed the diffusion of O_(2) and H_(2)O could be blocked by the Al_(2)O_(3) layer through physical absorption and penetration barrier effect.

关键词： hot rolling nanofluid lubricant oxidation protection molecular dynamics

Synthesis of N-doped carbon quantumn dots as lubricant additive to enhance the tribological behavioor f MoS_(2)nanofluid

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Friction 2023年第3期11卷 441-459页

作者： Jiaqi HE jianlin sun Junho CHOI Chenglong WANG Daoxin SU School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China Department of Mechanical Engineering The University of TokyoTokyo 113-8656Japan

In this study,a novel lubricant additive nitrogen-doped carbon quantum dot(N-CQD)nanoparticle was prepared by the solvothermal *** synthesized spherical N-CQD nanoparticles in the diameter of about 10 nm had a graphene oxide(GO)-like structure with various oxygen(O)-and nitrogen(N)-containing functional *** N-CQDs were added to MoS_(2)nanofluid,and the tribological properties for steel/steel friction pairs were evaluated using a pin-on-disk ***-equilibrium molecular dynamics(NEMD)simulations for the friction system with MoS_(2)or MoS_(2)+N-CQD nanoparticles were also *** results showed that friction processes with MoS_(2)+N-CQD nanofluids were under the mixed lubrication *** MoS_(2)nanofluid containing 0.4 wt%N-CQDs could achieve 30.4%and 31.0%reduction in the friction coefficient and wear rate,respectively,compared to those without *** analyzing the worn surface topography and chemical compositions,the excellent lubrication performance resulted from the formation of tribochemistry-induced *** average thickness of tribofilm was about 13.9 nm,and it was composed of amorphous substances,ultrafine crystalline nanoparticles,and self-lubricating FeSO_(4)/Fe2(SO_(4))_(3).NEMD simulation results indicated the interaction between S atoms in MoS_(2)as well as these O-and N-containing functional groups in N-CQDs with steel surfaces enhanced the stability and strength of *** the metal surface was further protected from friction and wear.

关键词： carbon-based quantum dots(CQDs) lubricant nanofluid molecular dynamics(MD) tribofilm

Preparation and Lubricating Properties of A New Antibacterial Emulsion Containing Nano-TiO_2 for Cold Rolling Strips

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China Petroleum Processing & Petrochemical Technology 2016年第3期18卷 110-118页

作者： Lu Yudi sun jianlin Zhang Bingtao School of Materials Science and Engineering University of Science and Technology Beijing

A new kind of emulsion containing nano TiO_2 was developed through the dispersion experiment. A commercial emulsion and a prepared by our lab emulsion without nano particles were chosen as controls to test the tribological and antibacterial properties of this new emulsion. The load carrying capacity, friction coefficient and average diameter of wear scars were tested by a four-ball machine and the comprehensive antifriction parameter ω was calculated. The wetting angle was also tested using a JC200C1 wetting angle tester. The micro surface and roughness of rolled strips were analyzed to investigate the tribological performance of the recommended new emulsion in strip production. It is shown that the new nano-emulsion possesses a higher load carrying capacity and wetting ability. Therefore the abrasive/plowing wear is reduced more efficiently with the addition of nano particles, and the micro surface is improved. The density of bacteria in the emulsions was tested after the cold rolling experiment. The emulsion breaking ratio and bacteria density were also tested in different time intervals after the cold rolling experiment. The final p H values and bacteria density of different layers of emulsions were measured and the sediment was analyzed by TEM to evaluate the antibacterial behavior of this new emulsion. It is shown that the density of microbial colonies which led to a corruption of emulsions was decreased about 90% and the effective antibacterial period was prolonged.

关键词： nano TiO2 dispersion emulsion, lubricant, antibacterial

Effects of Corrosion Inhibitors on Lubrication Performance of Rolling Oil for Copper Foil

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China Petroleum Processing & Petrochemical Technology 2014年第2期16卷 71-78页

作者： Xiong Sang sun jianlin Zeng Yingfeng Xu Yang School of Materials Science and Engineering University of Science and Technology Beijing Research Institute of Petroleum Processing Sinopec Corp.

The 2,5-bis（ethyldisulfanyl）-l,3,4-thiadiazole （T561）, benzotriazole （BTA）,1-N, N-bis （2-ethylhexyl） aminomethyl-4-methyl-lh-benzotriazole （IRGAMET39） and I-IN, N-bis （2-ethylhexyl） aminomethyl] methyl benzotriazole （TT- LX） have been evaluated as corrosion inhibitors used in rolling oil for cold rolling of copper foil. The MRS-10A four-ball friction and wear tests have been carried out to compare their tribological properties, and the lubricating performance of rolling oils has been studied through rolling experiments. The oil sample containing IRGAMET 39 has the same PB value as that one containing T561, with the coefficient of friction increased by 35.6% and wear scar diameter decreased by 4%. The minimum rolling gauge has been studied after rolling lubrication, but the results show that inhibitors have no effect on it. Scanning electron microscopy （SEM） and energy dispersive spectrometry （EDS） analyses have indicated that the inhibitor is adsorbed on the copper surface to prevent copper from being corroded easily. In addition, the LEXT OLS4000 laser confocal microscopy has been used to observe the foil surface which shows that the streaks of foil surface are clear, the scratches are shallow and the surface failure is improved effectively.

关键词： copper foil corrosion inhibitor cold rolling surface topography lubrication

Surface quality of cold rolling aluminum strips under lubrication condition

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Journal of University of Science and Technology Beijing 2008年第3期15卷 335-338页

作者： jianlin sun Wang Lu Yanli Ma Qingbing Shi Aihua Zhang Jian Li School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China School of Chemical Engineering Qinghai University Xining 810016 China

The effects of oil film on the rolled surface, including surface roughness and topography, were investigated during cold rolling of aluminum strips. Various mineral oils with viscosities from 0.10 to 1.6 Pa.s were used to obtain different oil film thicknesses. Results from experiment and calculation show that the thicker oil film protects the initial roughening surface so that it leads to an increase in roughness of the rolled surface, in particular when the surface roughness has the character of direction. The rolled surface roughness was determined by 2, which is the ratio of oil film thickness to the combined surface roughness. When 2 〉 3, the rolled surface roughness increases rapidly with the increase in oil viscosity, whereas the surface roughening has already occurred when 2 〈 3, but the increase of the rolled surface roughness with increasing viscosity is not distinct.

关键词： aluminum cold rolling lubrication surface roughness

Research on the Relationship between Molecular Activity of Additives and Lubricating Performance of Aluminum Rolling Oil

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China Petroleum Processing & Petrochemical Technology 2013年第3期15卷 13-18页

作者： Xia Lei sun jianlin Zeng Yingfeng Zhang Min Duan Qinghua School of Materials Science and Engineering University of Science and Technology Beijing Research Institute of Petroleum Processing Sinopec Corp.

In this paper,an ab initio,local density functional(LDF)method was used to explore the relationship between the molecular properties of additives and the lubricating performance of aluminum rolling *** structural properties of butyl stearate,dodecanol,docosanol,and methyl dodecanoate were studied according to the density functional *** calculated data showed that the atoms in or around the functional groups might be likely the reacting *** of the different functional groups and structure of ester and alcohol,two types of complex additives,dodecanol and butyl stearate,methyl dodecanoate and butyl stearate,respectively,were chosen for studying their tribological properties and performing aluminum cold rolling *** test results agreed with the calculated results very *** complex ester,*** dodecanoate and butyl stearate,had the best lubricating performance with a friction coefficient of 0.084 1 and a permissive-rolling thickness of 0.040 mm as compared with that of dodecanol-butyl stearate-base oil formulation.

关键词： aluminum rolling molecular properties lubricating performance DFT

Development and Lubricating Properties of Rolling Oil for Stainless Steel Cold Rolling

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China Petroleum Processing & Petrochemical Technology 2011年第2期13卷 57-64页

作者： Zhang Xu Wang Yizhu Yao Wenjing sun jianlin Wang Shiting Shanghai Research ＆ Development Center Lubricant Company SINOPEC Shanghai 200080 Guangzhou Mechanical Engineering Research Institute School of Materials and Engineering University of Science and Technology Beijing

Appropriate base oils and homologous additives such as extreme pressure and anti-wear agents,oiliness agents and antioxidants were selected,and experiments testing the compatibility performance between additive,base oil and other components were carried out to develop the SK and SD series of rolling oils for cold rolling of stainless *** developed oils were used in the stainless steel cold rolling lubrication experiments,and were successfully applied in the actual cold rolling operation of stainless *** with a foreign product,the tribological properties,the thermal oxidation stability,and the rolling lubrication performance of the developed stainless steel cold rolling oils were *** results showed that the tribological properties of the thereby developed rolling oils and the reference one were almost at the same level,and to some extent the performance of rolling was even better than the foreign product,at the same time the stainless steel sheet could retain its well annealed ***,within a certain range,the lubrication of the rolling oil became better as its viscosity increased at the same level of saponification value,which could provide a lower friction coefficient,so that a higher maximum reduction ratio of the rolled piece through a constant roll gap and a minimum thickness could be ***,similar phenomena appeared as the saponification value increased at a same viscosity level of the rolling oils.

关键词： stainless steel cold rolling oil rolling lubrication friction thermal analysis

Experimental determination of the Young’s modulus of individual single-walled carbon nanotubes with single chirality

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Nano Research 2024年第8期17卷 7522-7532页

作者： jianlin sun Xiao Zhang Yanchun Wang Mingming Li Xiaojun Wei Huaping Liu Weiya Zhou Beijing National Laboratory for Condensed Matter Physics and Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences and College of Materials Science and Optoelectronic Technology University of Chinese Academy of SciencesBeijing 100049China Songshan Lake Materials Laboratory Dongguan 523808China Beijing Key Laboratory for Advanced Functional Materials and Structure Research Beijing 100190China

One-dimensional carbon nanotube(CNT)exhibits excellent mechanical properties and is considered to be an ideal candidate material for the space ***,subtle changes in its chirality strongly affect its physical and chemical properties,including mechanical properties(such as Young's modulus,YM).Theoretical studies reveal that the YMs of perfect single-walled carbon nanotubes(SWCNTs)are in the order of TPa and related to their ***,due to the lack of SWCNTs samples with well-defined structures and the difficulties in mechanical tests on individual SWCNTs,the theoretical correlations between YM and structure of SWCNTs have not been verified and are still in debate,which directly influences the practical utilization of the excellent mechanical properties of *** this work,we have developed an experimental method to measure the YM of an individual micrometer-scale suspended CNT by atomic force microscopy.A distinct regularity is found between the YM and chirality(i.e.,chiral angle and diameter)of SWCNT in the experiment for the first *** comparing the YMs of SWCNTs with similar diameters and different chiral angles,it manifests that the SWCNT with a near zigzag configuration has a larger *** finding suggests that the effect of SWCNT’s structures on the YMs cannot be *** developed method of measuring YMs of SWCNTs will be valuable for further experimental research on the inherent physical and chemical properties of SWCNTs.

关键词： Young's modulus single-walled carbon nanotubes single chirality atomic force microscopy

Research on Lubrication Behaviors and Mechanism of Nano-Copper Used in Emulsions for Strip Cold Rolling

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China Petroleum Processing & Petrochemical Technology 2012年第1期14卷 61-67页

作者： Wang Yizhu Dai Enqi Zhuang Xiaohua sun jianlin Wang Bing Guangzhou Mechanical Engineering Research Institute Co. Ltd. Guangzhou 510700 School of Materials and Engineering University of Science and Technology Beijing Beijing 100083

In this paper,nano-Cu particles with an average size of smaller than 20 nm were dispersed under ultrasonic agitation in emulsions for cold rolling of steel *** tribological properties of the cold rolling emulsion doped with nano-Cu particles were evaluated by using a four-ball machine,and the worn surfaces of the steel balls were checked by an optical microscope.A JC2000C1 wetting angle tester was also applied to study the variation in the emulsion's wetting performance when nano-Cu particles were ***,the lubricity of the emulsion doped with nano-Cu for steel strip cold rolling was evaluated on a four-high rolling mill for comparison with the emulsion without using nano-Cu *** results indicated that nano-Cu particles as the additive used in cold rolling emulsion were able to improve the wetting property,friction-reducing,anti-wear,and extreme pressure performance of the base stock *** the same time,nano-Cu particles also showed good lubricity to the cold-rolled steel ***,the cold-rolled steel strips under the lubrication of the cold rolling emulsion containing nano-Cu particles had considerably decreased the after-rolling thickness and achieved excellent surface quality as ***,the lubrication mechanism of nano-Cu particles in the emulsion for cold rolling of steel strips was discussed.

关键词： cold rolling strip emulsion nano-Cu