Lubricity and Tribological Properties of Dicarboxylic Acid and Oleyl Alcohol Based Esters

Salimon, Jumat; Ahmed, Waled Abdo; Salih, Nadia; Yarmo, Mohd Ambar; Derawi, Darfizzi

doi:10.17576/jsm-2015-4403-12

Cited by 11 publications

(8 citation statements)

References 23 publications

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“…Therefore, most esters can be worked as boundary lubrication condition. Adsorption of the polar head groups on a metal surface will minimize the surface energy and causes a decrease of the friction coefficient (FC) [60]. In turn, polarity of the biolubricant upsurges its effectiveness in reducing wear.…”

Section: Tribological Analysismentioning

confidence: 99%

D-optimal design optimization of unsaturated palm fatty acid distillate and trimethylolpropane esterification for biolubricant production

Jumaah¹,

Salih²,

Salimon³

2022

Comptes Rendus. Chimie

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Section: Tribological Analysismentioning

confidence: 99%

D-optimal design optimization of unsaturated palm fatty acid distillate and trimethylolpropane esterification for biolubricant production

Jumaah¹,

Salih²,

Salimon³

2022

Comptes Rendus. Chimie

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“…Considering the poor performance of zinc dibutyldithiophospate as an antiwear additive, the proposed additive failed to achieve equivalent performance to commercially available antiwear additives. Other studies have used biolubricants derived from fatty acids or carboxylic acid and demonstrated improved antiwear performance with the presence of carbonyl groups …”

Section: Introductionmentioning

confidence: 99%

Synthesis and antiwear properties of dicarboxylic acid derivatives containing dialkyl dithiophosphate groups

Sim

Kim

Joeng

et al. 2019

Lubrication Science

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The use of lubricants has grown more widespread with industrial development. Lubricants usually contain additives with heavy metals such as zinc and molybdenum, increasing the emission of heavy metal contamination of soil and ocean. This study synthesised antiwear additives without heavy metal components in a simple and efficient manner by using alkane diacid derivatives produced from biomass and dithiophosphate instead of petroleum‐based compounds. A four‐ball wear test was performed to examine tribological performance in relation to changes in the alkyl chain length of the diacid and dithiophosphate of the synthesised antiwear additive, and the results were compared with the performance of zinc dialkyl‐dithiophosphorus (ZDDP), an antiwear additive that contains heavy metals. The tribological performance of the antiwear additives produced from synthesised dialkyl carboxylic acid derivatives was analysed based on the measurements of wear scar diameter. The wear scar diameter was 0.48 mm for the synthesised antiwear additive, whereas the ZDDP at a concentration of 0.05% gave a diameter of 0.82 mm. In the case of the synthesised antiwear additive, tribological performance did not improve for concentrations higher than 0.05%. An analysis of the carbon chain length of the dialkyl dithiophospate and dicarboxylic acid showed that the wear scar diameter was 0.72 mm when the alkyl chain length of R1 was 4. This diameter dropped below 0.48 mm when the alkyl chain length was greater than 8. When the number of carbons of dicarboxylic acid moiety was increased from 4 to 11, the antiwear performance improved slightly, with the wear scar diameter decreasing from 0.52 to 0.48 mm.

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“…The presence of the double bonds and its reactivity have allowed the functional addition reactions into the unsaturated fatty acids. The epoxidation process is one of the most important functionalization reactions of the double bond to other stable functional groups in order to improve the plant oils oxidative stability (Moser & Erhan 2007;Salimon et al 2015Salimon et al , 2011. It is also the most widely industrial used process towards highly unsaturated plant oil to increase their industrial usage (El-Adly et al 2014).…”

Section: Introductionmentioning

confidence: 99%

“…Epoxidised plant oils products from the epoxidation process can be used as high-temperature lubricants (Lathi & Mattiasson 2007;Salimon et al 2010), plasticizers (Joseph et al 2014) and high temperature coating materials (Derawi & Salimon 2016). Recently, palm oil become one of the potential plant oils in order to produce biolubricant base stock (Salimon & Salih 2009;Salimon et al 2015).…”

Section: Introductionmentioning

confidence: 99%

The Optimization of RBD Palm Oil Epoxidation Process using D-Optimal Design

Nor

Derawi²,

Salimon³

2018

JSM

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The epoxidation process of RBD palm oil was carried out using in situ generated performic acid. The effect of various process variables such as the formic acid towards hydrogen peroxide mole ratio, the reaction temperature and the reaction time were optimized by using response surface methodology (RSM). The D-optimal design was used to evaluate the influence of process variables and their interaction in order to obtain the process optimum conditions. The results showed that the optimum conditions of the epoxidation process were at 5.91 mole ratio of formic acid towards 3.60 mole of hydrogen peroxide, reaction temperature of 40ºC and reaction time of 2.55 h. At the optimum condition, the epoxidised RBD palm oil (EPO) yield was 86% with oxirane oxygen content (OOC) of 3.46%. The results showed in good agreement with the predicted values from the RSM model.

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Lubricity and Tribological Properties of Dicarboxylic Acid and Oleyl Alcohol Based Esters

Abstract: Synthesis of new lubricants nowadays is increasing to improve the lubricity properties

Cited by 11 publications

References 23 publications

D-optimal design optimization of unsaturated palm fatty acid distillate and trimethylolpropane esterification for biolubricant production

D-optimal design optimization of unsaturated palm fatty acid distillate and trimethylolpropane esterification for biolubricant production

Synthesis and antiwear properties of dicarboxylic acid derivatives containing dialkyl dithiophosphate groups

The Optimization of RBD Palm Oil Epoxidation Process using D-Optimal Design

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