线性扫描伏安法检测润滑油中抗氧剂含量的研究  

Determination of Antioxidant Content in Lubricants by Linear Scanning Voltammetry

作　　者：向亚玲[1] 金永亮[1] 钱绪政[1] 程冰雪 李健[1] 

机构地区：[1]武汉材料保护研究所材料表面保护技术湖北省重点实验室,湖北武汉430030

出　　处：《润滑与密封》2015年第12期18-23,共6页Lubrication Engineering

基　　金：国家重点基础研究发展计划(973计划)项目(2013CB632303)

摘　　要：润滑油中抗氧剂含量决定着润滑油的剩余寿命,研究一种抗氧剂含量快速、简便的测量方法对于润滑油研究十分重要。研究线性扫描伏安法测定润滑油中抗氧剂含量的原理和方法,基于普林斯顿电化学工作站,探讨电解质溶液和扫描速率对测量体系中抗氧剂产生特征伏安峰的影响。结果表明,扫描速率为5 m V/s时,酚类和胺类抗氧剂在含有十二烷基磺酸钠、乙醇和硫酸的电解质溶液中都出现了特征伏安峰,并且抗氧剂的特征伏安峰高与抗氧剂浓度显示出正相关趋势,表明采用线性扫描伏安法测定润滑油中抗氧剂含量是可行的。线性扫描伏安法快速简便,可用于合成油和矿物油中抗氧剂含量的测定,该方法在合成油和矿物油中T501抗氧剂随着老化时间的延长而不断消耗的表征中取得良好效果。The antioxidant content determines the remaining useful life of lubricants, so a quick and simple detecting method of the antioxidant content is especially important for the study of lubricants. The principles and methods of the determination of antioxidant content in lubricants by linear sweep voltammetry were studied, and the effect of the electrolyte and the scanning rate on the appearing of the vohammetric peak of antioxidants in measurement system based on PARSTAT 2273 electrochemical workstation was explored.The results show that when the scan rate is 5 mV/s and the electrolyte is composed of sodium dodecyl sulfate （SDS） , ethanol and sulfuric acid, the vohammetric peak appears for the phenol and amine antioxidants in the synthetic oil and mineral oil, and the antioxidant voltammetric peak shows a positive correlation trend with the antioxidant content in base oil, indicating it is feasible to determine the antioxidant content in base oil by linear sweep voltammetry.The linear sweep voltammetry is quick and simple, which can be used for the determination of the antioxidant content in synthetic oil and mineral oil.Good results are achieved for this method used in the determination of the continuous consumption of T501 antioxidant in synthetic oil and mineral oil with the aging time.

关 键 词：线性扫描伏安法 润滑油 抗氧剂含量 电解质溶液 扫描速率 

分 类 号：TH117.2[机械工程—机械设计及理论]