Poly-α-olefin (PAO, 3 cSt at 100 oC) and
Di-iso-octyl
sebacate (DIOS, 3 cSt at 100 oC) base oils are
purchased from Shanghai Foxsyn Chemical Science and Technology Co. Ltd.
and Shanghai Aladdin Biochemical Technology Co. Ltd., respectively. The
928 and 50-1-4Φ aviation lubrication oils are commercially available in
the Henan Hangcai Science and Technology Co. Ltd. Antioxidants,
including 2,6-butylated hydroxytoluene (T501), N-phenyl-1-naphthylamine
(T531) and 4,4-diisooctanyldiphenylamine (Tz516) is purchased from
Shanghai Kaiyin Chemicals Co. Ltd.
A lab-designed aviation lubrication oil comparative oxidation appliance
is made for the oxidation reactions of the oil samples in this paper.
The base oils (PAO, DIOS) and aviation lubrication oils (928 and
50-1-4Φ) are oxidized in the designed appliance shown in Figure 1 (The
detailed information of the appliance is shown in Figure 1s in SI). The
experiment conditions including metal sheet, oxidation time and
oxidation temperature are adjusted in oxidation reactions to produce the
oil specimens with different color numbers.