载银碳微球作为润滑油添加剂的摩擦学性能
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摘要
以纤维素为原料,通过水热法制备出碳微球,进一步通过葡萄糖还原硝酸银,在碳微球表面负载纳米银颗粒,银颗粒的尺寸为80~100nm.采用CFT-I型多功能材料表面性能测试仪对载银碳微球作为85W-90润滑油添加剂的润滑性能进行研究.结果表明,当硝酸银溶液浓度为0.10 mol/L时,所制备的载银碳微球(0.10Ag-C-oil)的摩擦系数仅0.082,与基础油(0.105)相比下降了21.9%,且具有良好的抗磨损性能.
Carbon microspheres were prepared from cellulose by hydrothermal method.Further,silver nanoparticles dotted on the surface of carbon microspheres were successfully fabricated by reduced silver nitrate.The silver nanoparticles with size of 80~100 nm were uniformly anchored on the surfaces of carbon microspheres.The prepared nanocomposite of AgC was used as additive in 85 W-90 gear oil,and the lubricating properties were studied by CFII multifunctional material surface performance tester.The results showed that the friction coefficient of the silver-loaded carbon microspheres(0.10 Ag-C-oil)was only 0.082,which was reduced by 21.9% compared with Base-oil,and the powders showed good wear resistance,when the concentration of silver nitrate solution was 0.10 mol/L.
Carbon microspheres were prepared from cellulose by hydrothermal method.Further,silver nanoparticles dotted on the surface of carbon microspheres were successfully fabricated by reduced silver nitrate.The silver nanoparticles with size of 80~100 nm were uniformly anchored on the surfaces of carbon microspheres.The prepared nanocomposite of AgC was used as additive in 85 W-90 gear oil,and the lubricating properties were studied by CFII multifunctional material surface performance tester.The results showed that the friction coefficient of the silver-loaded carbon microspheres(0.10 Ag-C-oil)was only 0.082,which was reduced by 21.9% compared with Base-oil,and the powders showed good wear resistance,when the concentration of silver nitrate solution was 0.10 mol/L.
引文
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[2]Salah N,Abdel Wahab M S,Habib S S,et al.Lubricant additives based on carbon nanotubes produced from carbon-rich fly ash[J].A S L E Transactions,2016,60(1):166-175.
[3]Lin J,Wang L,Chen G.Modification of graphene platelets and their tribological properties as a lubricant additive[J].Tribology Letters,2011,41(1):209-215.
[4]Berman D,Erdemir A,Sumant A V.Graphene:A new emerging lubricant[J].Materials Today,2014,17(1):31-42.
[5]Singh V K,Elomaa O,Johansson L S,et al.Lubricating properties of silica/graphene oxide composite powders[J].Carbon,2014,79(1):227-235.
[6]Raina A,Anand A.Effect of nanodiamond on friction and wear behavior of metal dichalcogenides in synthetic oil[J].Applied Nanoscience,2018(2):1-11.
[7]Shepelevskii A A,Esina A V,Voznyakovskii A P,et al.On the lubrication mechanism of detonation-synthesis nanodiamond additives in lubricant composites[J].Technical Physics,2017,62(9):1 364-1 371.
[8]Yao Y,Wang X,Guo J,et al.Tribological property of onion-like fullerenes as lubricant additive[J].Materials Letters,2008,62(16):2 524-2 527.
[9]Hu E,Hu X,Liu T,et al.The role of soot particles in the tribological behavior of engine lubricating oils[J].Wear,2013,304(1-2):152-161.
[10]Hui T,Shuai W,Yuan Y,et al.Friction and wear properties of Al-20Si-5Fe-2Ni-Graphite solid-lubricating composite at elevated temperatures[J].Tribology International,2018,122:228-235..
[11]Prasad B K,Rathod S,Yadav M S,et al.Sliding wear behavior of cast iron:Influence of MoS2and graphite addition to the oil lubricant[J].Journal of Materials Engineering&Performance,2011,20(3):445-455.
[12]Alazemi A A,Etacheri V,Dysart A D,et al.Ultrasmooth submicrometer carbon spheres as lubricant additives for friction and wear reduction[J].ACS Applied Materials&Interfaces,2015,7(9):5 514-5 521.
[13]St Dennis J E,Jin K,John V T,et al.Carbon microspheres as ball bearings in aqueous-based lubrication[J].ACS Applied Materials Interfaces,2011,3(7):2 215-2 218.
[14]Ma J,Mo Y,Bai M.Effect of Ag nanoparticles additive on the tribological behavior of multialkylated cyclopentanes(MACs)[J].Wear,2009,266(7-8):627-631.
[15]Li B,Wang X,Liu W,et al.Tribochemistry and antiwear mechanism of organic-inorganic nanoparticles as lubricant additives[J].Tribology Letters,2006,22(1):79-84.
[16]王勇,郑燕升,青勇权,等.油酸改性Y2O3超细粉的制备及分散性研究[J].化工新型材料,2014,42(10):70-72.
[17]Meng Y,Su F,Chen Y.Effective lubricant additive of nano-Ag/MWCNTs nanocomposite produced by supercritical CO2synthesis[J].Tribology International,2018,118:180-188.