Isopropyl-branched lard and its potential application as a bio-based lubricant

IF 1.8 4区工程技术 Q3 ENGINEERING, CHEMICAL Lubrication Science Pub Date : 2023-09-20 DOI:10.1002/ls.1673

Hailemichael O. Yosief, Majher I. Sarker, Grigor B. Bantchev, Robert O. Dunn

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Abstract

Regular lard (RL) was chemically modified into isopropyl-branched lard (BL). The isopropyl group was introduced into the triglyceride structure via a reaction of carbon–carbon double with isopropyl bromide in presence of ethylaluminum sesquichloride. The reaction was confirmed with gas chromatography–mass spectroscopy, nuclear magnetic resonance, infrared spectroscopy. The physical, tribological and chemical properties of the RL, BL and their blendings in polyalphaolefin (PAO) and high-oleic sunflower oil (HOSuO) were investigated. The BL exhibited better solubility both in HOSuO and PAO than RL. Compared to RL, BL exhibited higher density, viscosity, improved oxidative stability and cold flow properties both as a neat material and blendings in HOSuO or PAO. However, BL displayed lower viscosity index (197 vs. 162) compared to RL. Both RL and BL displayed similar lubricity as HOSuO and showed potential such as a good lubricity additive in PAO even in small amounts (~10 wt%). This study reveals introducing alkyl branching into lard can lead to improved physico-chemical properties and lubrication performance.

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异丙基支链猪油及其作为生物基润滑剂的潜在应用

普通猪油（RL）经化学改性为异丙基支链猪油（BL）。在乙基倍半氯化铝存在下，通过碳碳双与异丙基溴的反应，将异丙基引入甘油三酯结构中。该反应通过气相色谱-质谱、核磁共振和红外光谱得到证实。研究了 RL、BL 及其在聚α烯烃（PAO）和高油酸葵花籽油（HOSuO）中的混合物的物理、摩擦学和化学特性。与 RL 相比，BL 在 HOSuO 和 PAO 中的溶解性更好。与 RL 相比，BL 具有更高的密度、粘度、更好的氧化稳定性和冷流特性，无论是作为纯净材料还是与 HOSuO 或 PAO 混合使用。不过，与 RL 相比，BL 的粘度指数较低（197 对 162）。RL 和 BL 显示出与 HOSuO 相似的润滑性，并显示出在 PAO 中作为良好润滑性添加剂的潜力，即使用量很少（约 10 wt%）。这项研究表明，在猪油中引入烷基支化可改善物理化学特性和润滑性能。

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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.

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