Synthesis of fatty ester derived novel multifunctional additive and its performance evaluation in polyol base oil

IF 1.9 4区 农林科学 Q3 CHEMISTRY, APPLIED
Piyush Gupta, Shoaib Akhtar,  Nisha, Ripudaman Singh Negi, Suheel Kumar Porwal, Raj Kumar Singh
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Abstract

The organometallics like ZDDPs are widely used as multifunctional additives in lubricants for imparting antiwear, antioxidant, and corrosion inhibitor activity. Since it has toxic elements like P, Zn, and S so it is an environmentally toxic, non-biodegradable, and ash-forming additive. In automotive emissions, it also causes poisoning in catalytic converters. Due to environmental concerns, it is an issue of awareness to discover less toxic alternatives for these multifunctional additives despite their potent and economical properties. In this work, MO was reacted in a stoichiometric ratio with Tga, giving the intermediate compound MO-Tga through thiol-ene coupling. Subsequently, the reaction of MO-Tga with PPA gave a novel multifunctional additive MO-Tga-PPA. The molecular characteristics and thermal stability of MO-Tga-PPA were studied using techniques like NMR, FTIR, and TGA. The additive was doped at various concentrations such as 1000, 2000, 3000, 4000, and 5000 ppm in polyol to examine their antiwear, antifriction, antioxidant, and anticorrosion performance. It reveals the maximum reduction of 53.85% in the average COF and 25.51% in AWSD at 5000 ppm. The antioxidant activity shows a maximum free radicals inhibition of 97.9% at 3000 ppm using the DPPH. As far as the anticorrosion activity is concerned, the values for the penetration rate, corrosion rate, and weight loss were reduced to 0.015 mpy, 0.082 mdd, and 0.08 mg from the observed values of 0.114 mpy, 0.62 mdd, and 0.60 mg in polyol base oil was observed at 4000 ppm.

Abstract Image

Abstract Image

脂肪脂衍生新型多功能添加剂的合成及其在多元醇基础油中的性能评价
ZDDPs等有机金属化合物作为多功能添加剂广泛应用于润滑油中,具有抗磨、抗氧化和缓蚀剂的作用。因为它含有P、Zn、S等有毒元素,所以它是一种对环境有毒、不可生物降解的灰分添加剂。在汽车尾气排放中,它也会导致催化转化器中毒。由于环境问题,尽管这些多功能添加剂具有有效和经济的特性,但发现毒性较小的替代品是一个意识问题。在这项工作中,MO与Tga以化学计量比反应,通过巯基偶联得到中间化合物MO-Tga。随后,MO-Tga与PPA反应得到了新型多功能添加剂MO-Tga-PPA。采用NMR、FTIR、TGA等技术研究了MO-Tga-PPA的分子特性和热稳定性。在多元醇中以1000、2000、3000、4000、5000ppm等不同浓度掺杂添加剂,考察其抗磨、抗摩擦、抗氧化、防腐性能。结果表明,在5000ppm时,平均COF和AWSD最大降幅分别为53.85%和25.51%。在3000 ppm时,DPPH对自由基的抑制率达到97.9%。就防腐活性而言,在4000 ppm的多元醇基础油中,渗透率、腐蚀速率和失重值分别从0.114 mpy、0.62 mdd和0.60 mg降至0.015 mpy、0.082 mdd和0.08 mg。
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来源期刊
CiteScore
4.10
自引率
5.00%
发文量
95
审稿时长
2.4 months
期刊介绍: The Journal of the American Oil Chemists’ Society (JAOCS) is an international peer-reviewed journal that publishes significant original scientific research and technological advances on fats, oils, oilseed proteins, and related materials through original research articles, invited reviews, short communications, and letters to the editor. We seek to publish reports that will significantly advance scientific understanding through hypothesis driven research, innovations, and important new information pertaining to analysis, properties, processing, products, and applications of these food and industrial resources. Breakthroughs in food science and technology, biotechnology (including genomics, biomechanisms, biocatalysis and bioprocessing), and industrial products and applications are particularly appropriate. JAOCS also considers reports on the lipid composition of new, unique, and traditional sources of lipids that definitively address a research hypothesis and advances scientific understanding. However, the genus and species of the source must be verified by appropriate means of classification. In addition, the GPS location of the harvested materials and seed or vegetative samples should be deposited in an accredited germplasm repository. Compositional data suitable for Original Research Articles must embody replicated estimate of tissue constituents, such as oil, protein, carbohydrate, fatty acid, phospholipid, tocopherol, sterol, and carotenoid compositions. Other components unique to the specific plant or animal source may be reported. Furthermore, lipid composition papers should incorporate elements of year­to­year, environmental, and/ or cultivar variations through use of appropriate statistical analyses.
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