Effect of atomic oxygen on corrosion and friction and wear behavior of polyimide composites

Abstract

Thermosetting polyimide (TPI) composite with better wear resistance and lower friction was obtained with various functional fillers after a high-low temperature cycle test. Nevertheless, taking into consideration of harsh space condition, the friction and wear behavior of TPI composite were also explored after atomic oxygen (AO) irradiation. It reveals that TPI composite behaves excellent properties against AO mainly attributed to g-C 3 N 4 with more negative electronegativity N than carbon atom. Moreover, the mechanism of friction and wear demonstrated that degradation caused by AO led to TPI composite surface with special "carpet-like" morphology and this resulted into lubrication failure, especially when temperature was increased from 200 C to 350 C.

Improved Tribological Performance of MOF@MXene/PI under High Temperature

“…However, pure PI exhibits a high friction coefficient and large wear volumes during the sliding process. Thus, PI composites with improved tribological performance by adding functional nanofillers were widely studied by researchers. , Especially, functional nanofillers were incorporated into the three-dimensional network structure PI composites to obtain the multifunctional material.…”

A review of solid lubrication based on polyurethane composites

“…[19][20][21] Besides, lots of unlubricated polymer resins such as polyimide (PI) have low modulus and bearing capacity, which are limited to be applied in harsh conditions (e.g., superhigh vacuum, humid). [22][23][24][25] Therefore, the modification of polymer resins improved by lubricants is a key to solving poor lubrication problems. It is worth noting that polymer lubricants are widely used in aerospace, public transportation, and microelectronics due to their lightweight, low price, good self-lubricating, and adjustable structure.…”

Mechanically Robust Irradiation, Atomic Oxygen, and Static-Durable CrOx/CuNi Coatings on Kapton Serving as Space Station Solar Cell Arrays

“…Numerous techniques have been developed to alleviate AO degradation. For polymer modification based on silica precursor doping or silicon-based hyperbranching, the erosion yield will decrease by more than one order of magnitude. − However, these modified polymers are generally insulating and intolerant to radiation. Some alloy or nonvolatile oxide coatings − have been demonstrated to have AO durability.…”