Robust Superhydrophobic Membrane for Solving Water-Accelerated Fatigue of ZDDP-Containing Lubricating Oils
Robust Superhydrophobic Membrane for Solving Water-Accelerated Fatigue of ZDDP-Containing Lubricating Oils
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用于解决含 ZDDP 润滑油水加速疲劳问题的坚固超疏水膜
DOI：
10.1021/acs.langmuir.0c01407
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发表时间：
2020
期刊：
影响因子：
3.9
通讯作者：
Jing Li
中科院分区：
文献类型：
--
作者：
Siyang Zhao;Li Tie;Zhiguang Guo;Jing Li
超润湿材料在油水分离等界面应用中显示出明显的优势。然而，由于超疏水表面的机械耐久性差和添加剂稳定的难处理乳液，解决润滑油的水加速疲劳仍然是一个挑战。在这项工作中，一个强大的超疏水膜解决润滑油的水加速疲劳含有二烷基二硫代磷酸锌（ZDDP）作为一个典型的抗磨添加剂。采用简单的喷涂方法，将SiO2纳米颗粒与磷酸铝复合，制备了一种全无机涂层。经硅烷化处理后的膜具有极强的疏水性，即使在100次循环的砂击后，仍能有效地分离ZDDP稳定的润滑油包水乳状液（收集的润滑油纯度大于99.995%）。在高接触压力下的球盘摩擦学试验表明，再生润滑油恢复了润滑油的保护能力，并显著抑制了润滑油的催化脱氢作用，避免了大量不需要的碳基磨屑的产生。这一工作推动了润滑油工业中超润湿材料的发展。
Superwetting materials show distinct advantages in interfacial applications such as oil–water separation. However, it remains a challenge to solve water-accelerated fatigue of lubricating oils owing to the poor mechanical durability of superhydrophobic surfaces and the intractable emulsions stabilized by additives. In this work, a robust superhydrophobic membrane for solving water-accelerated fatigue of lubricating oils containing zinc dialkyldithiophosphate (ZDDP) as a typical antiwear additive is presented. An all-inorganic coating is constructed by SiO2nanoparticles and aluminum phosphate using a simple spray-coating method. After silanization, the prepared membrane can extremely repel water and effectively separate ZDDP-stabilized water-in-lubricating oil emulsions (the purities of the collected lubricating oils are over 99.995%), even after sand impingement for 100 cycles. Ball-on-disk tribological tests at severe contact pressures reveal that the reclaimed lubricating oils recover the protective ability, and the catalytic dehydrogenation of lubricating oil is dramatically suppressed to avoid producing a mass of unwanted carbon-based wear debris. This work advances the development of superwetting materials in the lubricating oil industry.