@article{LI2024, 
author = {Hanglin LI and Lin DING and Jingchun ZHANG and Zhaoyang GUO and Yazhuo SHANG and Honglai LIU and Xiangqiong ZENG and Jiusheng LI},
title = {A “bricks-and-mortar” structured graphene oxide/polyvinyl alcohol coating: Enhanced water interfacial lubrication and durability},
year = {2024},
journal = {Friction},
volume = {12},
number = {12},
pages = {2657-2678},
keywords = {graphene oxide, coating, water lubrication, anti-wear properties, durability},
url = {https://www.sciopen.com/article/10.1007/s40544-024-0902-7},
doi = {10.1007/s40544-024-0902-7},
abstract = {Coatings serve as ideal protective films for mechanical systems, providing dependable as well as efficient lubrication because of their unique structure along with outstanding tribological characteristics. Inspired by the “bricks-and-mortar” structure, we prepared layered graphene oxide (GO) composite finishes strengthened with polyvinyl alcohol (PVA) and borax. Our study demonstrates that the tribological properties of the GO-based coating on 304 stainless steel (SS304) are potentially greatly affected through PVA, GO, and annealing. By optimizing the composition, we achieved the PVA40 wt%/GO0.01 wt%/borax composite coating, which exhibited the lowest average coefficient of friction (COF) of 0.021±0.003 (a 97.86% reduction compared to control SS304) with minimal wear and abrasion even in a water environment. We found that the enhanced mechanical characteristics as well as elastic recovery within the coating were attributed to the hydrogen bonds and cross-linking between PVA and borax, which led to stress distribution. Reduced friction was further aided by the formation of a hydrated layer at the friction interface. As a result, the coating demonstrated remarkable durability, maintaining a low COF during long sliding distances (576 m, 28,800 cycles, significantly longer than previously reported) without breaking.}
}