Lipophilic magnetite nanoparticles coated with stearic acid: A potential green and low cost way to improve thermal stability and tribological properties of fully formulated low viscosity engine oils

Autor(es)

Zuin, Andre ^[1] ; Cousseau, T. ^[1] ; Sinatora, A. ^[2] ; Toma, H. E. ^[3]

Afiliação do(s) autor(es)

^[1] Fed Univ Technol, Mech Engn Dept, Curitiba, Parana - Brazil

^[2] Inst Tecnol Vale, Av Juscelino Kubitschek 31, BR-35400000 Bauxita, Ouro Preto - Brazil

^[3] Univ Sao Paulo, Inst Chem, Lab Supramol Chem & Nanotechnol, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: TRIBOLOGY INTERNATIONAL; v. 146, JUN 2020.
• Citações Web of Science: 0

Resumo

Lipophilic nanoparticles of magnetite (d approximate to 10 nm) functionalized with stearic acid (MagNP) were tested as additive in modern engine oil with low viscosity and high additization. Its thermal and tribological properties were evaluate using TG/DTA and a high frequency reciprocating tribometer, respectively. All tests were performed with the neat oil and the oil+MagNP. The analysis showed that MagNP: i) improved thermal stability of the engine oil; ii) kept friction values lower and more stable; iii) drastically reduce wear marks; iv) improved the deposition of additives from the lubricating oil onto the worn surface. (AU)

• Processo FAPESP: 13/19145-9 - Efeito da adição de nanopartículas de magnetita sobre o atrito e o desgaste em ensaios lubrificados que simulam o sistema anel-cilindro de motores do tipo flex-fuel
• Beneficiário: Andre Zuin
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado