添加稻壳基陶瓷颗粒改善液体石蜡润滑特性  

Rice husk ceramic particles improving lubrication property of liquid paraffin

作　　者：胡恩柱[1] 俞东瑞 汤玉超 吴云[1] 胡坤宏[1] 胡献国[2] 宋汝鸿[2] 

机构地区：[1]合肥学院化学与材料工程系,合肥230601 [2]合肥工业大学机械工程学院,合肥230009

出　　处：《农业工程学报》2017年第10期265-270,共6页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金资助项目(51505121);安徽省自然科学基金资助项目(1608085QE119;1508085J10);安徽省教育厅自然科学基金资助项目(KJ2017A536)

摘　　要：为了实现稻壳资源的综合利用,变废为宝,以稻壳和酚醛树脂为原料,高温碳化制备出稻壳基陶瓷颗粒(rice husk ceramic,RHC),将其作为润滑油功能添加剂,可缓解稻壳焚烧和储存给环境带来的危害。在四球机上探究不同温度(25、75和100℃)和司盘-80分散剂存在条件下,不同添加量(质量分数为0.01%、0.03%和0.05%)的RHC颗粒对液体石蜡(liquid paraffin,LP)润滑特性的影响,进而研究RHC颗粒的摩擦学行为。结果表明,25和75℃下,RHC颗粒在一定程度上改善了液体石蜡润滑性能,主要表现在钢球表面磨斑直径的降低,抗磨性增强,但并未明显降低摩擦系数;100℃下,RHC颗粒可明显改善液体石蜡的润滑特性,添加量为0.01%、0.03%和0.05%的油样与纯液体石蜡相比,平均摩擦系数从0.139(LP)分别降低到0.083、0.064和0.069;平均磨斑直径从0.389 mm(LP)分别降到0.314、0.311和0.318 mm。高温下摩擦诱导RHC颗粒组分参与边界润滑膜形成,起到抗磨减摩的功效。RHC颗粒可作为潜在的高温润滑油摩擦改进剂。Comprehensive utilization of rice husk resource is important in resolving serious environmental pollutions induced by arbitrary burning and storage of rice husk. Rice husk ceramic （RHC） particles can be a functional addition in developing high-quality and high-performance engine lubricating oils and comprehensively utilizing rice husk resource. In this study, coarse RHC particles were prepared via co-carbonization of rice husk and phenolic resin with a mass ratio of 3：1 for 2 h at 900 ℃ under N2 atmosphere. Then, the particles were ground in a planetary ball mill for 30 min to obtain fine RHC particles. Test oil samples including different contents （0.01%, 0.03%, and 0.05%） of RHC particles were prepared using a conventional magnetic stirring method until particles were uniformly dispersed in liquid paraffin （LP）. Effects of different contents of RHC particles on lubrication property of LP including 2% Span-80 were investigated using a four-ball tribometer at 200 N load and 1450 r/min rotation speed for 30 min. Test temperatures of 25, 75, and 100 ℃ were selected to simulate the real engine conditions of initial and high-speed operation. Variations in friction coefficient and average wear scar diameter （AWSD） reflected the anti-friction and anti-wear properties of the different oil samples. Scanning electron microscopy/energy dispersive spectroscopy were used to observe the morphologies of wear traces and detect element contents in the wear zones for the different samples, thereby reflecting the wear form of RHC particles on the surface of friction pairs. X-ray photoelectron spectroscopy was used to detect the variations in the element chemical valence and the element＇s atom contents in wear zones, and clarify the friction and wear mechanisms of RHC particles in LP under different test conditions. Results showed that friction coefficients did not obviously decrease in comparison with the pure LP, however, all AWSD decreased when different contents （i.e. 0.01%, 0.03%, and 0.05 %） of RHC

关 键 词：润滑 颗粒 摩擦 稻壳粉 陶瓷颗粒 液体石蜡 摩擦改进剂 抗磨减摩 

分 类 号：TH117[机械工程—机械设计及理论]