Thermal decomposition behavior of branched and linear perfluoropolyether lubricants

IF 1.6 4区化学 Q3 CHEMISTRY, INORGANIC & NUCLEAR

Journal of Fluorine Chemistry Pub Date : 2026-02-01 Epub Date: 2026-02-21 DOI:10.1016/j.jfluchem.2026.110548

Shizhao Yang , Jun Ma , Xin Xu , Jianqiang Hu , Li Guo , Jingpei Cao , Teng Chen

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Abstract

Perfluoropolyether (PFPE) lubricants play a significant role in the aerospace industry due to their outstanding chemical stability, thermal stability and anti-wear properties, however, their decomposition behavior has not been revealed fully. Herein, the decomposition mechanism and performance characteristics of four types of PFPE lubricants are investigated thoroughly by means of in situ heating fourier-transform infrared spectroscopy (in situ FTIR) and pyrolysis-gas chromatography/mass spectrometry (Py-GCMS). The results show that the specific sequence of antioxidant ability of PFPE is Fomblin Z03>Fomblin LC80>Fomblin M03≈Fomblin Y04. Moreover, metals can accelerate the oxidation of PFPE lubricants, generating acids, esters and anhydrides, resulting in an increase of acid value from 0.0025 mg KOH/g to 0.0109 mg KOH/g and 7.7 per cent increase in kinematic viscosity for Fomblin M03 after oxidation in 260 °C for 72 h. This work provides a technical scheme for the safe use of perfluoroalkylpolyether lubricants and promotes the research and application of new-generation ultra-high-temperature aviation engine lubricants.

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支链和线性全氟聚醚润滑剂的热分解行为

全氟聚醚（PFPE）润滑油因其优异的化学稳定性、热稳定性和抗磨性能在航空航天工业中发挥着重要作用，但其分解行为尚未得到充分揭示。本文采用原位加热傅里叶变换红外光谱（in situ FTIR）和热解-气相色谱/质谱（Py-GCMS）技术对四种PFPE润滑油的分解机理和性能特征进行了深入研究。结果表明，PFPE抗氧化能力的具体序列为：Fomblin Z03>；Fomblin LC80>Fomblin M03≈Fomblin Y04。此外，金属可以加速PFPE润滑油的氧化，生成酸、酯和酸酐，导致ffomblin M03在260℃氧化72 h后，酸值从0.0025 mg KOH/g增加到0.0109 mg KOH/g，运动粘度增加7.7%。本工作为全氟烷基聚醚润滑油的安全使用提供了技术方案，促进了新一代超高温航空发动机润滑油的研究和应用。

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来源期刊

Journal of Fluorine Chemistry 化学-无机化学与核化学

CiteScore

3.80

自引率

10.50%

发文量

审稿时长

33 days

期刊介绍： The Journal of Fluorine Chemistry contains reviews, original papers and short communications. The journal covers all aspects of pure and applied research on the chemistry as well as on the applications of fluorine, and of compounds or materials where fluorine exercises significant effects. This can include all chemistry research areas (inorganic, organic, organometallic, macromolecular and physical chemistry) but also includes papers on biological/biochemical related aspects of Fluorine chemistry as well as medicinal, agrochemical and pharmacological research. The Journal of Fluorine Chemistry also publishes environmental and industrial papers dealing with aspects of Fluorine chemistry on energy and material sciences. Preparative and physico-chemical investigations as well as theoretical, structural and mechanistic aspects are covered. The Journal, however, does not accept work of purely routine nature. For reviews and special issues on particular topics of fluorine chemistry or from selected symposia, please contact the Regional Editors for further details.