Titrimetric-comparable BN results determined for in-service lubricants using quantitative FTIR spectroscopy

IF 1.8 4区工程技术 Q3 ENGINEERING, CHEMICAL

Lubrication Science Pub Date : 2022-10-11 DOI:10.1002/ls.1624

Frederik van de Voort, Daniel Furness, Michael Viset

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引用次数: 1

Abstract

A new stoichiometric FTIR Base Number (BN) method of significant utility and analytical benefit to the tribology sector has been developed, providing ASTM D4739-comparable BN results in lieu of titration in a fraction of the time. Thirty-six new/in-service oils analysed by both methods were linearly related with a between-method accuracy of ~±1.0 BN and a within-FTIR method reproducibility of ~±0.50 BN. Acid pK_a differences and the comparative similarity of the FTIR results to HCl titration are discussed, including analytical benefits. It provides a rapid means of producing quality ASTM-comparable results, taking ~1 min/sample for spectral analysis versus 30–40 min for potentiometric titration. Method protocols are best suited to an open architecture FTIR accessory but can be readily adapted to flow cell equipped FTIRs. As structured, ASTM-like results are obtained rapidly with a major analytical environmental/maintenance footprint reduction, being ideally suited for in-service lubricant or research labs analysing 20–50 samples/day.

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使用定量傅里叶红外光谱测定在役润滑油的滴定可比BN结果

一种新的化学计量FTIR碱基数(BN)方法已经开发出来，对摩擦学领域具有重要的效用和分析效益，在一小部分时间内提供ASTM D4739可比的BN结果，而不是滴定。两种方法分析的36种新/现役油均呈线性相关，方法间准确度为~±1.0 BN, FTIR法内重现性为~±0.50 BN。讨论了酸的pKa差异和FTIR结果与HCl滴定的比较相似性，包括分析的好处。它提供了一种快速产生高质量ASTM可比结果的方法，光谱分析仅需1分钟/个样品，电位滴定仅需30-40分钟。方法协议最适合于开放式结构的FTIR附件，但可以很容易地适应于配备FTIR的流动池。在结构上，类似ASTM的结果可以快速获得，主要的分析环境/维护足迹减少，非常适合在役润滑剂或研究实验室分析20-50个样品/天。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Lubrication Science ENGINEERING, CHEMICAL-ENGINEERING, MECHANICAL

CiteScore

3.60

自引率

10.50%

发文量

审稿时长

6.8 months

期刊介绍： Lubrication Science is devoted to high-quality research which notably advances fundamental and applied aspects of the science and technology related to lubrication. It publishes research articles, short communications and reviews which demonstrate novelty and cutting edge science in the field, aiming to become a key specialised venue for communicating advances in lubrication research and development. Lubrication is a diverse discipline ranging from lubrication concepts in industrial and automotive engineering, solid-state and gas lubrication, micro & nanolubrication phenomena, to lubrication in biological systems. To investigate these areas the scope of the journal encourages fundamental and application-based studies on: Synthesis, chemistry and the broader development of high-performing and environmentally adapted lubricants and additives. State of the art analytical tools and characterisation of lubricants, lubricated surfaces and interfaces. Solid lubricants, self-lubricating coatings and composites, lubricating nanoparticles. Gas lubrication. Extreme-conditions lubrication. Green-lubrication technology and lubricants. Tribochemistry and tribocorrosion of environment- and lubricant-interface interactions. Modelling of lubrication mechanisms and interface phenomena on different scales: from atomic and molecular to mezzo and structural. Modelling hydrodynamic and thin film lubrication. All lubrication related aspects of nanotribology. Surface-lubricant interface interactions and phenomena: wetting, adhesion and adsorption. Bio-lubrication, bio-lubricants and lubricated biological systems. Other novel and cutting-edge aspects of lubrication in all lubrication regimes.