Study of cystine schiff base esters as new environmentally benign multifunctional biolubricant additives

Singh, Rajesh Kumar; Pandey, Shubham; Saxena, Richa; Thakre, Gananath D.; Atray, Neeraj; Ray, Siddharth S.

doi:10.1016/j.jiec.2014.11.027

Cited by 26 publications

(12 citation statements)

References 26 publications

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“…Plant-derived compounds, such as cystine schiff base ester, exhibit good properties regarding their use as additives in anticorrosion, antiwear or antifriction processes, since the disulfide groups (-S-S-) form a surface-complex film to protect the metal pieces in contact with each other [75]. On the other hand, ethyl cellulose and ethylene-vinyl acetate have emerged as potential additives to modify viscosity, since even the addition of a small amount of these compounds can double the viscosity of a biolubricant.…”

Section: Use Of Additives To Improve Lubricant Propertiesmentioning

confidence: 99%

An Overview of the Biolubricant Production Process: Challenges and Future Perspectives

et al. 2020

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The term biolubricant applies to all lubricants that are easily biodegradable and non-toxic to humans and the environment. The uses of biolubricant are still very limited when compared to those of mineral oils, although this trend is increasing and depends on investment in research and development (R&D). The increase in demand for biodegradable lubricants is related to the evolution of environmental regulations, with more restrictive rules being implemented to minimize environmental impact caused by inappropriate disposal. This study provides an overview of the types, production routes, properties, and applications of biolubricants. Biolubricants are classified as either natural or synthetic oils according to chemical composition. Natural oils are of animal or vegetable origin and are rarely used because they are unstable at high temperatures and form compounds that are harmful to equipment and machines. Synthetic oils are obtained from chemical reactions and are the best lubricants for demanding applications. They are obtained by various routes, mainly by obtaining straight or branched-chain monoesters, diesters, triesters, and polyol esters from vegetable oils. The conversion of triglyceride to esters can be followed or preceded by one or more reactions to improve reactions such as epoxidation and hydrogenation.

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Section: Use Of Additives To Improve Lubricant Propertiesmentioning

confidence: 99%

An Overview of the Biolubricant Production Process: Challenges and Future Perspectives

et al. 2020

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“…Recently, Schiff bases have gained great attention as lubricant additives due to their easy preparation, high performance, and environmental friendliness. − Most of the work that has been done is to connect phenol and Schiff base into one molecule, and the obtained antioxidant is more effective than the corresponding phenol. − These highly active phenolic Schiff bases could display multifunctional properties after combining with other fragments such as thiourea, chitosan, , and amino acid derivatives. − Inspired by these works, we considered introducing Schiff base as a bridge to combine sterically hindered phenol and diphenylamine into one molecule (Scheme ).…”

Section: Introductionmentioning

confidence: 99%

Schiff Base Bridged Phenolic Diphenylamines for Highly Efficient and Superior Thermostable Lubricant Antioxidants

Feng

Cai

et al. 2017

Ind. Eng. Chem. Res.

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Normally, the sterically hindered phenols and diphenylamines, used as antioxidants, are added into the base oil simultaneously in order to improve the antioxidant efficiency. In view of this, we have designed a new type of antioxidant which combined the two traditional antioxidants into one molecule with Schiff base. These novel Schiff base bridged phenolic diphenylamine (SPD) antioxidants have been prepared through a one-step synthesis method which is suitable for large-scale production. The thermal stability and antioxidant ability were examined by thermal gravimetric analyzer (TGA) and pressurized differential scanning calorimetry (PDSC), respectively. The results showed that they both had better thermal stability and antioxidant efficiency than the commonly used commercial antioxidants. Importantly, the formulation of SPDs with other additives also exhibited improved antioxidant performances, presenting good application potential in the lubricant industry.

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“…Acylated chitosan Schiff bases with 3,5‐di‐tert‐butyl‐4‐hydroxybenzaldehyde were evaluated as multifunctional additives with antioxidants and lubricity properties along with a screening of corrosion behavior in bio lubricant base oil (N‐butyl palmitate/stearate) (Singh et al, 2014a, b). Ca salts of histidine Schiff base esters were evaluated as the detergent dispersant, the antioxidant and antiwear multifunctional additive in polyol base oil (Singh et al, 2015a, b). Two multifunctional additives were also synthesized in two‐step process by using cystine.…”

Section: Introductionmentioning

confidence: 99%

“…Two multifunctional additives were also synthesized in two‐step process by using cystine. Both additives were evaluated as MFA in polyol base fluid for deposits inhibition and lubricity properties (Singh et al, 2015a, b). A novel organo‐inorganic hybrid salt, was synthesized by the reaction between hexachlorocyclotriphosphazene (N 3 P 3 Cl 6 ) and 2,6‐di‐tert‐butyl‐4‐(dimethylaminomethyl)phenol and evaluated as an antioxidant, anticorrosion, antiwear, and antifriction multifunctional additive in polyol lube base oil (Singh et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Efficiency of Dodecenylsuccinic Amide of n‐Phenyl‐p‐Phenylenediammine as Novel Multifunctional Lubricant Additive for Deposit Control and Lubricity

Faujdar

Negi

Bhonsle

et al. 2020

J Surfact & Detergents

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A novel multifunctional amide additive N-phenyl-p-phenylenediamine-dodecenylsuccinic anhydride (PPA-DDSA) was synthesized by the reaction of DDSA and N-phenyl-p-phenylenediamine. The successful synthesis of amide additive was confirmed by various analytical techniques like Fourier Transform infrared spectroscopy, nuclear magnetic resonance spectroscopy, and thermogravimetric analysis. Performance of prepared additive was evaluated as multifunctional additive for anti-oxidant, detergent dispersant, anti-corrosion, and lubricity properties. The MAK-500 ® mineral base oil and synthetic polyol base oil were used as a reference. The antioxidant property was evaluated by using the 2,2-diphenyl-1-picrylhydrazyl method, which revealed that PPA-DDSA was better antioxidant than PPA and gallic acid but less effective than butylated hydroxytoluene. PPA-DDSA was found to be excellent detergent dispersant in polyol in comparison to the MAK-500. At 4000 ppm additive concentration, the coking value is reduced to 0.0205 g from the value of 0.0840 g for blank polyol while the % dispersancy increased to 40.67 from 20.00 for polyol base oil. The antiwear property was observed to be better in the MAK-500 while the antifriction potential was found to be better in polyol base oil. The average wear scar is reduced from 881 to 550 μM at 2000 ppm concentration in MAK-500 base oil, while at 3000 ppm PPA-DDSA concentration, the average friction coefficient reduces to 0.0826 from 0.1276 for blank polyol.

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Study of cystine schiff base esters as new environmentally benign multifunctional biolubricant additives

Cited by 26 publications

References 26 publications

An Overview of the Biolubricant Production Process: Challenges and Future Perspectives

An Overview of the Biolubricant Production Process: Challenges and Future Perspectives

Schiff Base Bridged Phenolic Diphenylamines for Highly Efficient and Superior Thermostable Lubricant Antioxidants

Efficiency of Dodecenylsuccinic Amide of n‐Phenyl‐p‐Phenylenediammine as Novel Multifunctional Lubricant Additive for Deposit Control and Lubricity

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