Modification of POSS and their tribological properties and resistant to space atomic oxygen irradiation as lubricant additive of multialkylated cyclopentanes

Autor: Xingwei Wang, Chaoyang Zhang, Chen Zhao, Yijing Liang, Ming Zhang, Wufang Yang, Bo Yu, Qiangliang Yu, Meirong Cai, Feng Zhou, Weimin Liu
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Friction, Vol 12, Iss 5, Pp 884-896 (2024)
Druh dokumentu: article
ISSN: 2223-7690
2223-7704
DOI: 10.1007/s40544-023-0798-7
Popis: Abstract Developing functional additive resistant to space atomic oxygen (AO) irradiation through simple molecular design and chemical synthesis to enhance the lubricating performance of multialkylated cyclopentanes (MACs) oil is a significant challenge. Herein, sulfur-containing polyhedral oligomere silsesquioxane (POSS) were synthesize via a click-chemistry reaction of octavinyl polyhedral oligomeric with alkyl sulfide. The reduce-friction (RF), anti-wear (AW) properties and anti-AO irradiation of POSS-S-R as MACs base oil additives in atmospheric and simulated space environments were systematically investigated for the first time. Results demonstrate that POSS-S-R not only possesses outstanding anti-AO irradiation capacity but also effectively improves the RF and AW of MACs in atmospheric or simulated space surroundings. This improvement is due to the excellent anti-AO irradiation properties of the POSS structure itself and the high load-carrying ability of silicon-containing and sulfur-containing compounds generated by tribo-chemical reactions, which effectively separates the direct contact of the friction interface. We believe that this synthesized POSS-S-R is a promising additive for space lubricants.
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