Leaves Based Lubricant Additive Towards Improving Tribological Properties

• 作者: Xin Feng Yanqiu Xia Yichao Hu Zhengfeng Cao
• 来源期刊: 可再生材料杂志(英文)
• 学科: 工学
• 关键词: CROP leaf-surface WAX green ADDITIVE synthetic ESTER TRIBOLOGICAL property
• 年，卷（期）: 2019,（5）
• 页码范围: 441-449
• 页数: 9页
• 分类号: TG1

摘要

Three kinds of crop leaf-surface waxes were extracted from wheat,corn and broomcorn leaves,respectively.The crop leaf-surface waxes as lubricant additives were added to synthetic ester and the friction and wear properties of prepared lubricants for steel-aluminum and steel-copper friction pair were investigated in detail.The scanning electron microscopy(SEM)and secondary ion mass spectrometry(SIMS)were employed to explore the friction mechanisms.The results show that crop leaf-surface waxes could successfully reduce the friction and wear of steel-aluminum and steel-copper sliding friction pairs as compared with pure synthetic ester.For example,when the concentration of wheat leaf-surface wax as additive was 2%,the COFs was decreased by 58%;the four additives can be ranked by the anti-wear capability as follows:Corn>Wheat>Glycerol>Broomcorn to steel-aluminum sliding friction pairs.The SIMS spectra of positive and negative ions on the worn surfaces have reduced the exposure of Al and increased short chain ions counts.The good friction reduction and antiwear abilities are attributed to the adsorption or reaction films formed by leafsurface wax on worn surface.