Lipophilic magnetite nanoparticles coated with stearic acid: A potential agent for friction and wear reduction

被引：32
|
作者：
Zuin, Andre [1 ,4 ]
Cousseau, Tiago [2 ]
Sinatora, Amilton [1 ,3 ]
Toma, Sergio Hiroshi [4 ]
Araki, Koiti [4 ]
Toma, Henrique Eisi [4 ]
机构：
[1] Univ Sao Paulo, Polytech Sch, Dept Mech Engn, Surface Phenomena Lab, Sao Paulo, Brazil
[2] Fed Univ Technol, GrMats Grp Mat Tribol & Surfaces, Parana, Brazil
[3] Inst Tecnol Vale, Av Juscelino Kubitschek,31 Bauxita, BR-35400000 Ouro Preto, Brazil
[4] Univ Sao Paulo, Inst Chem, Lab Supramol Chem & Nanotechnol, Sao Paulo, Brazil
来源：
TRIBOLOGY INTERNATIONAL | 2017年 / 112卷
基金：
巴西圣保罗研究基金会;
关键词：
Magnetite nanoparticles; Nanolubricants; Boundary lubrication; Anti-wear agent; ANTIWEAR; LUBRICANT; BEHAVIOR; CONTACT;
D O I：
10.1016/j.triboint.2017.03.028
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Lipophilic magnetite nanoparticles (MagNP; d approximate to 10 nm) functionalized with stearic acid were synthetized and tested as additive in polyalphaolefin synthetic base oil (PAO8) in a model system. The thermal properties of the starting base oil and of the base oil mixed with nanoparticles were evaluated using TG/DTA under inert and oxidizing atmosphere. The frictional response of the lubricants was evaluated under a broad range of operating conditions at the boundary lubrication regime using a 10 mm AISI 52,100 bearing steel ball against the flat face of an AISI H13 steel disc. The results showed that: i) MagNP improved the thermal stability of the base oil; ii) reduced the friction values, mostly during load step transition; iii) reduced significantly the wear marks.
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页码：10 / 19
页数：10
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