Tribological characterisation of plant oil derived fatty acid esters of higher polyols: Comparative experimental study

Abstract

In this paper, we present the study on the synthesis, physico‐chemical, and tribological characterisation of selected plant‐derived fatty acids esters of higher polyols. We described here more effective method synthesis of desired esters with high yields and high selectivities. In our novel and improved synthesis protocol, we applied homogeneous Sn catalysts. Physico‐chemical characterisation and lubricating properties of synthesised esters have been determined and discussed. Our results showed that the synthesised esters are characterised by excellent viscosity, good low temperature, and lubrication properties. High thermal resistance is the main benefit of synthesised esters. For fatty acid esters of trimethylolpropane dimer, onset temperatures are around 400°C and decomposition temperatures above 460°C, which makes these esters applicable in higher temperature.

The tribological properties of lubricating greases produced on vegetable base and modified of polytetrafluoroethylene

“…A group of model lubricating compositions was devel-oped using non-toxic ingredients that are a dispersing and dispersed phase [18][19][20]. As a dispersing phase, vegetable oil (sunflower) with very good physicochemical properties was used.…”

The Tribological, Physico-Chemical and Rheological Properties of Lubricating Grease Produced on Epoxy Resin Base

“…A lubricating grease produced on the base of epoxy resin was used for the tests (grease A) and for comparison of lubricating greases based on high quality hydrotreated mineral oil (grease B) [19], based on refined vegetable oil (grease C) [20][21][22][23][24][25] and on the base of high-viscous synthetic oil (grease D) [26]. The information concerning the use of materials is included in Table 1.…”

Prospects of Plant-Based Trimethylolpropane Esters in the Biolubricant Formulation for Various Applications: A Review

“…The impurities generated from the use of acidic catalyst during the incomplete esterification process (such as unreacted raw materials) or catalyst residue could contaminate the produced lubricant (Papadaki et al, 2018). Nowicki et al (2019) acknowledged that homogeneous acid catalyst had disadvantages for instance, high corrosivity and difficult product recovery. As a result, a similar catalyst used in the food sector, Tin (II) bis(2-ethylhexanoate), which is neutral and noncorrosive, was selected for the investigation.…”

“…The produced TMPE exhibited the smallest WSD (0.64 mm), the greatest anti-seizure properties (3450 N), and outstanding thermal stability at 400 °C, according to studies on high TMP dimers. The most crucial aspect was that proper catalyst selection enables the manufacturing of high-quality products without the requirement for high vacuum distillation operations (Nowicki et al, 2019). Papadaki et al (2018) investigated the production of TMPE from a two-step bioprocess microbial oil and TMP.…”