国产一级a毛一级a看免费视频,久久久久久国产一级AV片,免费一级做a爰片久久毛片潮,国产精品女人精品久久久天天,99久久久无码国产精品免费了

 文獻名： Synergy between Covalent Organic Frameworks and Surfactants to Promote Water-Based Lubrication and Corrosion Resistance

 

作者： Ping Wen, Yongzhen Lei, Wenqian Li, Mingjin Fan

Department of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji, Shaanxi 721013, P. R. China

 

摘要：Corrosion and friction undulation caused by water-lubricated mechanical devices severely restricts the development of water-based lubricant in practical industries. In this paper, a kind of triazine-based covalent organic framework (TriC) nanomaterial is fabricated as the water-based lubricant additive, and two kinds of surfactant, namely, coconut diethanol amide (CDEA) and Tween 85 (T-85), were chosen carefully as water-based modifiers, respectively. Then, friction behaviors were evaluated using both composite dispersions as the lubricants, compared to either component alone, on an SRV-V tribometer under the high contact pressure. The dramatic reduction in friction coefficient (72.2% and 74.4%) and wear rate (98.0% and 95.8%) is shown by adding 0.1 wt % TriC into CDEA and T-85 aqueous solutions with 1% concentration in comparison with the pure water. More importantly, the perfect anticorrosion on the worn surface of the steel disk is observed during the rubbing process. Subsequently, the preferably competitive adsorption of TriC on the surface of friction pair and two uniquely assembled film configurations depended on surfactant structure are proposed to elaborate the opposite difference in friction and wear resistance as well as perfect anticorrosion.