Synthesis and evaluation of amines/phenolics antioxidant for TMPTO base oil

The purpose of this paper is to synthesize amines/phenolic antioxidants by a new method and to characterize the influence of antioxidants on thermo-oxidative degradation in trimethylolpropane trioleate (TMPTO) base oil.,The molecule structures of antioxidants and lubricants were confirmed using Fourier transform infrared spectroscopy (FTIR). The oxidative stability of antioxidants and lubricants was evaluated by pressurized differential scanning calorimetry (PDSC).,These findings suggested that butyl-octyl-diphenylamine has obvious advantage on kinematic viscosity inhibition, and amine-phenol combination antioxidant has a slightly better suppression of total acid in TMPTO under thermal oxidation at 200°C for 96 h. The FTIR characterizations showed that all antioxidants could protect the basic structure of TMPTO in the early stage of thermal degradation.,Under the action of butyl-octyl-diphenylamine, the dehydrogenation of TMPTO is easily met with the alkenyl hydrogen = C–H bond in the unsaturated C = C. Meanwhile, as octadecyl 3-(3, 5-di-tert-butyl-4-hydroxyphenyl)propionate protects TMPTO, the unsaturated C = C bond in the base oil molecule easily breaks down during transition.

[1]  James Pullen,et al.  An overview of biodiesel oxidation stability , 2012 .

[2]  B. Barman.  Behavioral differences between group I and group II base oils during thermo-oxidative degradation , 2002 .

[3]  Juozas Padgurskas,et al.  A comparison of pure and natural antioxidant modified rapeseed oil storage properties , 2013 .

[4]  J. Madarasz,et al.  Impact of antioxidant additives on the oxidation stability of biodiesel produced from Croton Megaloc , 2011 .

[5]  Patric Waara,et al.  Additive influence on wear and friction performance of environmentally adapted lubricants , 2001 .

[6]  Sevim Z. Erhan,et al.  Synthesis of novel alkoxylated triacylglycerols and their lubricant base oil properties , 2005 .

[7]  Chunming Xu,et al.  Effects of additives on the properties of chloroaluminate ionic liquids catalyst for alkylation of isobutane and butene , 2004 .

[8]  R. Rastogi,et al.  Low sulfur, phosphorus and metal free antiwear additives: Synergistic action of salicylaldehyde N(4)-phenylthiosemicarbazones and its different derivatives with Vanlube 289 additive , 2013 .

[9]  A. Jess,et al.  Influence of acidity of modified chloroaluminate based ionic liquid catalysts on alkylation of iso-butene with butene-2 , 2012 .

[10]  Suojiang Zhang,et al.  Ionic liquid enhanced alkylation of iso-butane and 1-butene , 2013 .

[11]  Xiangqiong Zeng,et al.  The tribological performance and tribochemical analysis of novel borate esters as lubricant additives in rapeseed oil , 2014 .

[12]  A. Petsom,et al.  Synergistic and antagonistic effects on oxidation stability of antioxidants in a synthetic ester based oil , 2011 .

[13]  Xiaobo Wang,et al.  Improvement of oxidative stability of trimethylolpropane trioleate lubricant , 2013 .

[14]  H. Ali,et al.  Anilinosilanes as thermo-oxidation stabilizers of commercial lubricating base oils , 1997 .

[15]  Haji Hassan Masjuki,et al.  Impacts of NOx reducing antioxidant additive on performance and emissions of a multi-cylinder diesel engine fueled with Jatropha biodiesel blends. , 2014 .

[16]  Martin Mittelbach,et al.  The impact of antioxidants on biodiesel oxidation stability , 2004 .

[17]  W. Zhan,et al.  Synthesis of butyl-octyl-diphenylamine as lubricant antioxidant additive by ionic liquids , 2018 .

[18]  Jiusheng Li,et al.  Preparation and performance evaluation of mPAO8 using olefin from coal as raw material , 2017 .

[19]  Dimitrios Karonis,et al.  Evaluation of the oxidation stability of diesel/biodiesel blends , 2010 .

[20]  Xuzheng Qian,et al.  Thermal-oxidation mechanism of dioctyl adipate base oil , 2016 .

[21]  Wei-min Liu,et al.  A novel imidazolium salt with antioxidation and anticorrosion dual functionalities as the additive in poly(ethylene glycol) for steel/steel contacts , 2013 .