Evaluation of liquid phase oxidation products of ester and mineral oil lubricants

Naidu, S. K.; Klaus, E. E.; Duda, J. L.

doi:10.1021/i300016a021

Cited by 82 publications

(52 citation statements)

References 3 publications

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“…These assignments revealed the formation of oxygenated structures such as peroxy acids, esters, and ketones during the oxidation of vegetable oils. The formation of such compounds has also been reported in other previous studies (4,14). The trend observed in the FTIR spectra of vegetable oils oxidized at 200°C showed that as oxidation progressed, the absorption of the O-H and C=O peaks decreased, suggesting that polymerization of the carbonyl compounds had taken place.…”

Section: Resultssupporting

confidence: 83%

“…The oils were used as received without any further purification. The FA compositions of the SBO and HOSO provided by each supplier were as follows (in %): SBO: palmitic, 10.5; stearic, 4.1; oleic, 23.4; linoleic, 52.6; linolenic, 7.2; HOSO: palmitic,7; stearic,4; oleic, 83; linoleic,3; linolenic, 2. Some physical properties of the vegetable base stocks evaluated are listed in Table 1.…”

mentioning

confidence: 99%

“…In this study, the Penn State micro-oxidation test (PSMO), a thin-film test used extensively to study the oxidative stability of mineral and synthetic oils, was selected. This relatively simple thin-film test requires a much smaller sample size than most oxidation tests; it is not oxygen-diffusion limited and requires relatively short test durations (3,4). The wear performance of the test fluids was evaluated using a sequential four-ball wear test (SFBT).…”

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confidence: 99%

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A study of the oxidation and wear properties of vegetable oils: Soybean oil without additives

Castro

Perez

Erhan

et al. 2006

J Americ Oil Chem Soc

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The use of biodegradable lubricants in diverse applications continues to increase. Vegetable oils (e.g., soybean oil) are the main biodegradable lubricant base stocks used worldwide. However, there are concerns about their oxidative stability and low-temperature performance. Improvements in oxidative stability can be made through chemical or genetic modifications. This work compared the effects of oils with different chemical compositions. Soybean oil, high-oleic soybean oil, and epoxidized soybean oil were compared in laboratory bench tests. The tests conducted include the Penn State sequential four-ball wear test and the Penn State micro-oxidation test. Oxidation products from the micro-oxidation test were analyzed by FTIR and gel permeation chromatography. In this paper, all oils were evaluated neat, without additives.It is only natural that lubricant technology has advanced as a result of concerns for protecting and preserving the environment in all aspects of our lives. Research and development in lubricant technology to find better ways to protect the environment-or at least to reduce environmental pollutants-is driven by public demand, industry concerns, and governmental agency policies. The negative impact of the spillage or leakage of lubricants has led to the development of oils and greases that are less detrimental to the environment if inadvertently spilled or leaked.As a result of these growing environmental concerns, vegetable oils and their derivatives are finding their way into lubricants used in industrial and transportation applications. Vegetable oils can offer significant environmental advantages with respect to biodegradability and renewability, as well as satisfactory performance in a variety of applications. However, vegetable oils differ from traditional mineral or synthetic oils in that they are composed of TAG, which have different amounts and types of FA attached to the glycerol portion of the vegetable oil structure. The FA vary in the length of their hydrocarbon chains and degree of unsaturation (1). A direct consequence of this unique composition is that such oils oxidize much more rapidly than other lubricant base fluids because of the presence of double bonds. As a result, improving the oxidative stability of vegetable oils is a major objective. One approach used to improve their performance is to modify the FA structure either chemically or genetically (2).In this study, the oxidative and wear performance of oils were compared to better understand how the chemical composition of the base stock affects these properties. The oxidative stability of the base oils can be evaluated by different techniques. In this study, the Penn State micro-oxidation test (PSMO), a thin-film test used extensively to study the oxidative stability of mineral and synthetic oils, was selected. This relatively simple thin-film test requires a much smaller sample size than most oxidation tests; it is not oxygen-diffusion limited and requires relatively short test durations (3,4). The wear performance of the ...

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confidence: 83%

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confidence: 99%

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A study of the oxidation and wear properties of vegetable oils: Soybean oil without additives

Castro

Perez

Erhan

et al. 2006

J Americ Oil Chem Soc

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“…The IR spectra of the samples show two main distinct absorption peaks at 1600 cm À1 and at 1590 cm À1 , which appear more prominent as processing time increases. The band at 1600 cm À1 has been previously related to part of the ketone group [-C5 5C-C5 5O] [29,30]. On the other hand, the peak at 1590 cm À1 can be attributed to carboxylic groups which may arise from the degradation of polyolefins [31].…”

Section: Resultsmentioning

confidence: 95%

Formulation and processing of virgin and recycled polyolefin/oil blends for the development of lubricating greases

Martín‐Alfonso¹,

Romero²,

Valencia³

et al. 2013

Journal of Industrial and Engineering Chemistry

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“…The t 4 point corresponds to the end of the 100 min isothermal time. From these time points, and their corresponding weights, a series of pseudokinetic equations can be developed (eqs [5][6][7][8][9][10][11], which are analogous to those used in the TFMO system. 7,28,29 …”

Section: ■ Results and Discussionmentioning

confidence: 99%

Isothermal Thermogravimetric Analysis of Soybean Oil Oxidation Correlated to Thin Film Micro-Oxidation Test Methods

Arca

Sharma

Perez

et al. 2012

Ind. Eng. Chem. Res.

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An isothermal thermogravimetric analysis (TGA) method was used to generate a model capable of predicting the results of the Thin Film Micro-Oxidation (TFMO) test in a soybean oil system. Utilizing a series of pseudorate constants and "activation energies", weight loss data from the TGA method can predict oxidation, polymerization, evaporation, and the formation of high molecular weight deposits, normally observed in the TFMO test. These parameters can be used in simple computer simulations which can calculate the weight of each component of a lubricant as it decomposes. This allows evaluation of lubricants without the difficult to obtain TFMO equipment, instead utilizing equipment available in most laboratories.

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Evaluation of liquid phase oxidation products of ester and mineral oil lubricants

Cited by 82 publications

References 3 publications

A study of the oxidation and wear properties of vegetable oils: Soybean oil without additives

A study of the oxidation and wear properties of vegetable oils: Soybean oil without additives

Formulation and processing of virgin and recycled polyolefin/oil blends for the development of lubricating greases

Isothermal Thermogravimetric Analysis of Soybean Oil Oxidation Correlated to Thin Film Micro-Oxidation Test Methods

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