Evaluation of physicochemical, tribological and oxidative stability properties of chemically modified rice bran and karanja oils as viable lubricant base stocks for industrial applications

Edla, Sneha; Thampi, Ananthan D; Pranav, P.; Rani, S.

doi:10.1016/j.triboint.2022.107631

Cited by 21 publications

(17 citation statements)

References 38 publications

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“…The presence of alkane was confirmed by a peak at 1460 cm À1 . 25 The peak at 2853 cm À1 was the asymmetric stretching vibration of the methyl group. 26 Bands that appear at 2922-2954 cm À1 are caused by C H vibrations, specifically the asymmetrical stretching of CH(CH 2 ) and the asymmetrical stretching of CH 3 .…”

Section: Ftir Spectra Analysismentioning

confidence: 99%

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Formulation and tribological performance of engine oil blended with various non‐edible vegetable oils

Basiron

Abdollah

Abdullah

et al. 2023

Lubrication Science

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This present study formulated eco‐friendly lubricants by combining non‐edible vegetable oils with a mineral oil and investigated their efficacy on the friction and wear characteristics of four AISI 52100 chrome steel balls. Multiple formulations containing varying combinations of 0 to 100 vol% of a mineral oil SAE 15W40 (S100), castor oil (C100), and jatropha oil (J100) were prepared using the sonification technique in an ultrasonic homogeniser. A fourier transform spectrometer (FTIR) was then used to investigate the molecular vibrations of each formulation. A tribological test was also performed with a four‐ball tribometer according to ASTM D4172‐94 engineering standards. Finally, a scanning electron microscope (SEM) equipped with an energy dispersive X‐ray spectroscope (EDX) was used to examine surface morphologies. The 80% S100, 10% C100, and 10% J100 (S80C10J10) formulation provided excellent tribological performance as it contained fatty acids composed of carbohydrates and carbonyl groups, particularly polysaccharides and glycerols.

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Section: Ftir Spectra Analysismentioning

confidence: 99%

“…Alkane was represented by a range of peaks observed between 1456 and 1461 cm À1 . 25 The sharp peak at 1743 cm À1 represented the characteristic peaks of carbonyl groups of proteins. 26 As stated by the authors, 33 a peak at 2854 cm À1 represents saturated hydrocarbon ( CH 3 ).…”

Section: Ftir Spectra Analysismentioning

confidence: 99%

Formulation and tribological performance of engine oil blended with various non‐edible vegetable oils

Basiron

Abdollah

Abdullah

et al. 2023

Lubrication Science

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“…However, the β-hydrogen atoms in the hydroxyl groups and unsaturated free fatty acids (FFA) of the vegetable oil triglycerides promote fast crystallisation, resulting in poor thermo-oxidative stability. Therefore, converting vegetable oil into synthetic esters through chemical modifications (e.g., epoxidation, hydrogenation and transesterification [4]) can remedy this deficiency. One of the economically feasible solutions is to convert vegetable oil into a synthetic polyol ester, namely, trimethylolpropane ester (TMP ester), using transesterification.…”

Section: Introductionmentioning

confidence: 99%

“…One of the economically feasible solutions is to convert vegetable oil into a synthetic polyol ester, namely, trimethylolpropane ester (TMP ester), using transesterification. On top of an improved thermo-oxidative stability [4,5], numerous research studies on such polyol esters derived from vegetable oil have produced biolubricants with a lubricity that is on par or superior to conventional lubricants [6,7]. To date, vegetable oils, such as palm oil [8], jatropha oil [9], rice bran [4], karanja oil [4], sunflower oil [9], soybean oil [9,10] and cotton seed oil [11], have been transesterified to produce TMP esters.…”

Section: Introductionmentioning

confidence: 99%

“…On top of an improved thermo-oxidative stability [4,5], numerous research studies on such polyol esters derived from vegetable oil have produced biolubricants with a lubricity that is on par or superior to conventional lubricants [6,7]. To date, vegetable oils, such as palm oil [8], jatropha oil [9], rice bran [4], karanja oil [4], sunflower oil [9], soybean oil [9,10] and cotton seed oil [11], have been transesterified to produce TMP esters. Recently, studies on TMP esters have shifted towards specific fatty acid chains, namely, from TMP trioleate [12,13].…”

Section: Introductionmentioning

confidence: 99%

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Boundary Lubricity of Vegetable-Oil-Derived Trimethylolpropane (TMP) Ester

Lee

Chong

et al. 2022

Lubricants

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Vegetable-oil-based biolubricants are an excellent alternative to conventional lubricants. Instead of focusing on novel feedstocks, these biolubricants should be further elucidated based on their fatty acid composition, which influences their tribological properties. Therefore, the study utilises gene expression programming (GEP) to derive a boundary lubricity model for vegetable-oil-derived trimethylolpropane (TMP) esters, considering the fatty acid composition (saturation and monounsaturation levels), load and speed. Neat vegetable oil and blends from seven feedstocks are selected following a wide range of fatty acid profiles to synthesise TMP esters using a two-stage transesterification process. The TMP esters are spin-coated on wear discs that are subsequently rotated against a ball using a purpose-built tribometer. The frictional performance of the TMP esters with balanced saturation and monounsaturation levels of fatty acid are measured to improve it at higher speeds. The GEP model is statistically evaluated by adopting the friction data, a showing good generalisation and predictability capability. The model demonstrates that friction decreases with increasing saturation levels of the TMP ester. The GEP model for vegetable oil TMP esters allows for the tribological performance prediction of TMP esters following the fatty acid profile, providing a platform to optimise such biolubricant for desired applications.

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Polyols from castor oil (Ricinus communis) and epoxidized soybean oil (Glycine max) for application as a lubricant base

Stradolini,

Gryczak,

Petzhold

2023

J Americ Oil Chem Soc

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Polyols are widely synthesized from fossil sources and applied in multiple sectors of the industry as raw material for polyurethane production and also as lubricants. Although the preparation method normally used is efficient and practical, it is necessary to develop environmentally friendly synthesis route that reduce pollution. This study focuses on an alternative synthetic route for the synthesis of polyols using only raw materials from renewable sources. Polyols were successfully obtained by modifying castor oil and epoxidized soybean oil through transesterification, transamidation and oxirane ring opening. The polyols were then characterized by Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance (1H and 13C‐NMR), acidity index (AI), thermogravimetry (TGA), differential scanning calorimetry (DSC), size exclusion chromatography (SEC), dynamic viscosity and exploratory scanning of ecotoxicological parameters using Artemia salina. The results highlight the promising potential of transamidated castor oil (TACO) polyol in the field of biolubricants, attributed to its high viscosity index, oxidative stability and, ecofriendly behavior.

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Evaluation of physicochemical, tribological and oxidative stability properties of chemically modified rice bran and karanja oils as viable lubricant base stocks for industrial applications

Cited by 21 publications

References 38 publications

Formulation and tribological performance of engine oil blended with various non‐edible vegetable oils

Formulation and tribological performance of engine oil blended with various non‐edible vegetable oils

Boundary Lubricity of Vegetable-Oil-Derived Trimethylolpropane (TMP) Ester

Polyols from castor oil (Ricinus communis) and epoxidized soybean oil (Glycine max) for application as a lubricant base

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