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鉴于对生物质能源的需求日益增长,将典型微藻生物油添加到CD 15W-40柴油机油中实现部分替代.采用四球摩擦磨损试验机考察了生物油的润滑性能,利用现代表面分析技术探讨了其作用机理.结果表明:微藻生物油有很好的润滑效果;随柴油机油中生物油添加量的增大,摩擦系数逐渐降低、钢球磨斑直径先减小后增大;当生物油的添加质量百分数为10%时,柴油机油的摩擦学性能较优.其中,利用La2O3催化液化制备的生物油的润滑性能优于直接液化制备的生物油,能显著降低摩擦系数和钢球磨斑直径.就润滑机理而言,润滑油中的含C、N有机物在摩擦副接触表面吸附、沉积形成润滑膜,同时摩擦副滑动表面经摩擦化学反应生成由Fe2O3和FeN组成的保护膜,从而起到良好的润滑防护作用.相关研究结果可望为拓展生物油的应用提供参考.
In view of the growing demand for biomass energy, the typical microalgae bio-oil was added to CD 15W-40 diesel engine oil to achieve partial replacement.The four-ball friction and wear testing machine was used to investigate the bio-oil’s lubricity, and the use of modern surface analysis technology The results show that the microalgae bio-oil has very good lubricating effect. With the increase of bio-oil in diesel engine oil, the friction coefficient decreases gradually, The tribological properties of diesel oil were better when the mass percentage was 10%, of which the bio-oil prepared by La2O3 catalytic liquefaction was better than the bio-oil prepared by direct liquefaction, which could significantly reduce the friction coefficient and the diameter of the ball’s wear scar. In terms of the lubrication mechanism, the C and N containing organic compounds in the lubricating oil adsorb and deposit on the contact surface of the friction pair to form a lubricating film, and the sliding surface of the friction pair generates a protective film composed of Fe2O3 and FeN through triboelectrochemical reaction, thus playing a good role Of the lubricating effect of the relevant research results are expected to expand the application of bio-oil provide a reference.