基于反应分子动力学的DLC膜在蜡质采油环境中的摩擦行为及机理研究

IF 3.9 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Langmuir Pub Date : 2025-02-11 DOI:10.1021/acs.langmuir.4c03659

Yunhai Liu, Ligao Liu, Hu Zhang, Penghui Xu

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引用次数: 0

摘要

类金刚石（DLC）膜由于其优异的耐磨性和抗摩擦性能，被认为是一种非常有前途的涂层，可以减少石油和天然气开采设备的摩擦和磨损。通过分子动力学（MD）模拟研究了Fe-Fe模型（普通钢柱塞泵筒）和lc - fe模型（涂覆lc柱塞泵筒）在含蜡采油环境下的摩擦磨损行为。结果表明：DLC膜可以抑制摩擦界面的晶格演化，减少摩擦副之间的剪切变形以及DLC膜与含蜡原油体系之间的弱相互作用，最终降低摩擦磨损；另外，随着环境温度的升高，Fe-Fe摩擦体系的摩擦力不断增大。有趣的是，DLC - fe摩擦体系在环境温度升高后的平均摩擦力小于其在298 K时的平均摩擦力，这表明DLC膜在高温采油环境中具有很大的潜力。该工作可为DLC膜在油井泵柱塞表面的实际工程应用提供理论支持。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Study on the Friction Behavior and Mechanism of DLC Films in Waxy Oil Extraction Environment Based on Reactive Molecular Dynamics

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Study on the Friction Behavior and Mechanism of DLC Films in Waxy Oil Extraction Environment Based on Reactive Molecular Dynamics

Diamond-like carbon (DLC) film is considered a highly promising coating for reducing friction and wear in oil and gas exploitation equipment, owing to its exceptional wear resistance and antifriction properties. Herein, the friction and wear behavior of the Fe–Fe model (conventional steel plunger pump barrel) and the DLC–Fe model (DLC-coated plunger pump barrel) in a waxy oil recovery environment was studied by Molecular dynamics (MD) simulation. The results show that the DLC film can inhibit the lattice evolution of the friction interface and reduce the shear deformation between the friction pairs and the weak interaction between the DLC film and the waxy crude oil system, ultimately reducing the friction and wear. In addition, as the environmental temperature rises, the friction of the Fe–Fe friction system continues to increase. Interestingly, the average friction of the DLC–Fe friction system after the increase in environmental temperature is smaller than its average friction at 298 K, implying that the DLC film has great potential in high-temperature oil extraction environments. This work may provide theoretical support for the practical engineering application of DLC films on the surface of oil well pump plungers.

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来源期刊

Langmuir 化学-材料科学：综合

CiteScore

6.50

自引率

10.30%

发文量

1464

审稿时长

2.1 months

期刊介绍： Langmuir is an interdisciplinary journal publishing articles in the following subject categories: Colloids: surfactants and self-assembly, dispersions, emulsions, foams Interfaces: adsorption, reactions, films, forces Biological Interfaces: biocolloids, biomolecular and biomimetic materials Materials: nano- and mesostructured materials, polymers, gels, liquid crystals Electrochemistry: interfacial charge transfer, charge transport, electrocatalysis, electrokinetic phenomena, bioelectrochemistry Devices and Applications: sensors, fluidics, patterning, catalysis, photonic crystals However, when high-impact, original work is submitted that does not fit within the above categories, decisions to accept or decline such papers will be based on one criteria: What Would Irving Do? Langmuir ranks #2 in citations out of 136 journals in the category of Physical Chemistry with 113,157 total citations. The journal received an Impact Factor of 4.384*. This journal is also indexed in the categories of Materials Science (ranked #1) and Multidisciplinary Chemistry (ranked #5).