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

作　　者：Xingwei WANG Chaoyang ZHANG Chen ZHAO Yijing LIANG Ming ZHANG Wufang YANG Bo YU Qiangliang YU Meirong CAI Feng ZHOU Weimin LIU 

机构地区：[1]State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou,730000,China [2]Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing,Yantai,264000,China

出　　处：《Friction》2024年第5期884-896,共13页摩擦（英文版）

基　　金：support from National Key Research and Development Program of China(2021YFA0716304);National Natural Science Foundation of China(52075524,51705504 and 21972153);Youth Innovation Promotion Association CAS(2022429 and 2018454);Gansu Province Science and Technology Plan(22JR5RA094,20JR10RA060);Natural Science Foundation of Shandong Province(ZR2022ZD09);LICP Cooperation Foundation for Young Scholars(HZJJ21-06).

摘　　要：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.

关 键 词：POSS additive reduce-friction ANTI-WEAR multialkylated cyclopentanes(MACs) resistant atomic irradiation 

分 类 号：TH117.2[机械工程—机械设计及理论]