聚α-烯烃润滑油基础油高温氧化性能研究

发布时间：2018-08-31 12:21

【摘要】：采用高温氧化加速模拟装置,研究聚α-烯烃基础油的高温氧化变化规律;利用FTIR和GC/MS等检测手段,分析聚α-烯烃基础油及其高温产物结构组成的变化,探讨结构变化对油品性能变化的影响,推测润滑基础油高温氧化的过程及其反应类型。结果表明:高温作用下,聚α-烯烃润滑基础油发生了严重的热氧化和热裂解反应,导致基础油颜色加深、黏度变小、酸值增大;由于聚α-烯烃含有较多的叔碳分子的特殊结构,在高温下易发生断裂,生成活泼的自由基,自由基在氧气作用下,发生氧化反应,生成小分子的醛、酮、酸、酯等物质,使得润滑油的酸值变化显著;同时聚α-烯烃分子发生断裂时,生成的小分子烷烃、烯烃等,造成聚α-烯烃润滑基础油黏度衰变。
[Abstract]:The changes of high temperature oxidation of poly (伪 -olefin) base oil were studied by means of high temperature oxidation accelerated simulation device, and the structural changes of poly (伪 -olefin) base oil and its high temperature products were analyzed by means of FTIR and GC/MS. The effects of structural changes on oil properties were discussed, and the oxidation process and reaction types of lubricating base oils at high temperature were inferred. The results show that under the action of high temperature, poly (伪 -olefin) lubricating base oils undergo severe thermal oxidation and pyrolysis reaction, which leads to the deepening of the color, the decrease of viscosity and the increase of acid value of the base oils, due to the special structure of polyalpha olefins containing more tertiary carbon molecules. It is easy to break down at high temperature and form active free radicals. Under the action of oxygen, free radicals oxidize and produce small molecules of aldehydes, ketones, acids, esters, etc., which make the acid number of lubricating oil change significantly. At the same time, when the polyolefin molecules break, small alkanes and olefins are formed, which results in the viscosity decay of polyolefin lubricating base oils.
【作者单位】：空军勤务学院航空油料物资系;黄山学院;
【基金】：江苏省青年基金项目(BK20150166) 空军勤务学院青研基金项目(KJ2014D03513) 空军装备部项目(KJ2012283) 空军后勤部项目(CKJ13007) 江苏省自然科学基金项目(BK20161187)
【分类号】：TE626.9

【相似文献】