Determining the antioxidant activities of organic sulfides by rotary bomb oxidation test and pressurized differential scanning calorimetry

Qiu, Chao; Han, Sheng; Cheng, Xu; Ren, Tianhui

doi:10.1016/j.tca.2006.01.014

Cited by 25 publications

(14 citation statements)

References 27 publications

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“…The oxidative stability of lubricating oils and the oxidation inhibition capacity of antioxidant additives can be evaluated using methods such as pressurized differential scanning calorimetry (PDSC), rotary bomb oxidation test (RBOT), thin film micro oxidation test (TFMO), turbine oil stability test (TOST), and hydroperoxide titration test [36][37][38]. In this study, PDSC which is an effective way to evaluate the antioxidant efficiency and oxidation stability of base oils [39][40][41] was employed.…”

Section: Resultsmentioning

confidence: 99%

Physical Properties and Fatty Acid Profiles of Oils from Black, Kidney, Great Northern, and Pinto Beans

Sutivisedsak

Moser

Sharma

et al. 2010

J Americ Oil Chem Soc

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Four common beans (black, kidney, great northern, and pinto) were extracted with hexane and found to contain about 2% triacylglycerols. The fatty acids in these bean oils were mainly linolenic (41.7-46 wt%), linoleic (24.1-33.4 wt%), palmitic (10.7-12.7 wt%) and oleic (5.2-9.5 wt%). Because of the high levels of polyunsaturated fatty acids, the bean oils had iodine values between 174 and 177 g/100 g (compared to 130 g/100 g for soybean oil). Yet, the bean oils exhibited high oxidative stability due to the presence of high amounts of tocopherols (2,670-2,970 ppm). The bean oils had lower pour points (-18 to -11°C) compared to -9°C for soybean oil. Among the four bean oils, kidney bean oil had the highest acid value (15.4 mg KOH/g) and kinematic viscosities over a wide range of temperatures.

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Section: Resultsmentioning

confidence: 99%

Physical Properties and Fatty Acid Profiles of Oils from Black, Kidney, Great Northern, and Pinto Beans

Sutivisedsak

Moser

Sharma

et al. 2010

J Americ Oil Chem Soc

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“…To clarify, the effect is very important to choose right antioxidants in real working conditions. Modern technologies, such as rotary bomb oxidation tester, GCMS, and DSC, are powerful methods to analyze the oxidative stability of base oil while antioxidant is applied. Those techniques could thoroughly probe the molecular structure, thermal stability, and oxidation resistance of oil samples.…”

Section: Introductionmentioning

confidence: 99%

The influence of high temperature oxidation on molecular structure and performance of aviation base oils

Fei

et al. 2018

Asia-Pacific J Chem Eng

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In this paper, the dioctyl adipate (DIOA) and poly‐α‐olefin (PAO) were comparatively study to systematic evaluate the influence of high temperature oxidation on the molecular structure and performance of the base oil. Even the DIOA has better antioxidation properties, antioxidant could significantly reduce the molecular structure damage during high temperature oxidation for the both two kinds of base oils. Because the decrement of kinematic viscosity was slow down after antioxidant was added into the base oils, the kinematic viscosity ratio of DIOA and PAO is nearly 1.7 after oxidation at 300°C, which is down to 1.2 while antioxidant is applied. Based on the DSC analysis, the antioxidant could postpone the oxidation process of the PAO and DIOA oil samples and have longer oxidation induction time (17.5 and 35.1 min) and higher incipient oxidation temperature (262.3°C and 243.8°C), respectively. The oxidation induction time of DIOA is nearly twice (or triple) the value of PAO4, which suggests a much better antioxidation performance of DIOA. The GCMS results elucidate that the species and quantities of oxidation products are reduced simultaneously.

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“…Oil samples were heated from an ambient temperature of 180°C at the heating rate of 100°C min -1 . Once the temperature is stabilized at 180°C, pressurization of PDSC cell with oxygen, pressure, oxygen flow and temperature were adjustments were done within 2 minute time 17 . PDSC held at the isothermal mode until an exothermic peak of oxidation onset is detected.…”

Section: Measurement Of Oxidation Products By Ft-irmentioning

confidence: 99%

Study of Antioxidant Activity of Hindered Phenols in Bulk Oil and Thin Film Oxidation Conditions in Lubricants

Sutar¹,

Singare²

2018

RJC

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Antioxidant activity of three substituted hindered phenolic antioxidants is studied in bulk oil oxidation and thin film oxidation conditions. Test conditions of The Institute of Petroleum test method IP-48 are used for evaluation of inhibition activity of antioxidants in bulk oil oxidation regime and Pressure Differential Scanning Calorimetry (PDSC) is used for thin film oxidation regime. Para position of phenolic antioxidant has a substitution of alkyl, ester and thioether linkage in these selected antioxidants. Antioxidant activity of thioether substitution is found better that ester and alkyl substitution. Ester substitution in para position has better inhibition activity than alkyl substitution. Relative Inhibition activity of selected antioxidants is similar in both bulk oil oxidation process (which is slower oxidation reaction) and in thin film oxidation (which is relatively faster oxidation reaction.)

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Determining the antioxidant activities of organic sulfides by rotary bomb oxidation test and pressurized differential scanning calorimetry

Cited by 25 publications

References 27 publications

Physical Properties and Fatty Acid Profiles of Oils from Black, Kidney, Great Northern, and Pinto Beans

Physical Properties and Fatty Acid Profiles of Oils from Black, Kidney, Great Northern, and Pinto Beans

The influence of high temperature oxidation on molecular structure and performance of aviation base oils

Study of Antioxidant Activity of Hindered Phenols in Bulk Oil and Thin Film Oxidation Conditions in Lubricants

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