Effect of Copper Nanoparticles Surface-Capped by Dialkyl Dithiophosphate on Different Base Oil Viscosity

IF 4.7 3区材料科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC ACS Applied Electronic Materials Pub Date : 2024-04-18 DOI:10.3390/lubricants12040137

Xufei Wang, Shuguang Fan, Ningning Song, Laigui Yu, Yujuan Zhang, Shengmao Zhang

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Abstract

In order to more accurately characterize the effects of nanoparticles on lubricant viscosity, the effects of copper dialkyl dithiophosphate (HDDP)-modified (CuDDP) nanoparticles on the dynamic viscosity of mineral oils 150N, alkylated naphthalene (AN5), diisooctyl sebacate (DIOS), and polyalphaolefins (PAO4, PAO6, PAO10, PAO40, and PAO100) were investigated at an experimental temperature of 40 °C and additive mass fraction ranging from 0.5% to 2.5%. CuDDP exhibits a viscosity-reducing effect on higher-viscosity base oils, such as PAO40 and PAO100, and a viscosity-increasing effect on lower-viscosity base oils, namely, 150N, AN5, DIOS, PAO4, PAO6, and PAO10. These effects can be attributed to the interfacial slip effect and the shear resistance of the nanoparticles. The experimental dynamic viscosity of the eight base oils containing CuDDP was compared with that calculated by the three classical formulae of nanofluid viscosity, The predicted viscosity values of the formulae deviated greatly from the experimental viscosity values, with the maximum deviation being 7.9%. On this basis, the interface slip effect was introduced into Einstein’s formula, the interface effect was quantified with the aniline point of the base oil, and a new equation was established to reflect the influence of CuDDP nanoparticles on lubricating oil viscosity. It can better reflect the influence of CuDDP on the viscosity of various base oils, and the deviation from the experimental data is less than 1.7%.

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二硫代磷酸二烷基酯表面包覆的纳米铜颗粒对不同基础油粘度的影响

为了更准确地描述纳米颗粒对润滑油粘度的影响，研究了二烷基二硫代磷酸铜（HDDP）改性纳米颗粒（CuDDP）对矿物油 150N.、烷基化萘（AN5）、癸二酸二异辛酯（DIOS）和聚α烯烃（PAO4、PAO6、PAO10、PAO40）动态粘度的影响、烷基化萘 (AN5)、癸二酸二异辛酯 (DIOS) 和聚α烯烃（PAO4、PAO6、PAO10、PAO40 和 PAO100）的动态粘度的影响。5% 至 2.5%。CuDDP 对 PAO40 和 PAO100 等粘度较高的基础油具有降粘作用，而对 150N、AN5、DIOS、PAO4、PAO6 和 PAO10 等粘度较低的基础油则具有增粘作用。这些效应可归因于纳米粒子的界面滑移效应和剪切阻力。将含有 CuDDP 的八种基础油的实验动态粘度与纳米流体粘度的三种经典公式计算出的粘度进行了比较，发现公式预测的粘度值与实验粘度值偏差很大，最大偏差为 7.9%。在此基础上，将界面滑移效应引入爱因斯坦公式，用基础油的苯胺点量化界面效应，建立了反映 CuDDP 纳米粒子对润滑油粘度影响的新公式。它能更好地反映 CuDDP 对各种基础油粘度的影响，与实验数据的偏差小于 1.7%。

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来源期刊

ACS Applied Electronic Materials Multiple-

CiteScore

7.20

自引率

4.30%

发文量

567

期刊介绍： ACS Applied Electronic Materials is an interdisciplinary journal publishing original research covering all aspects of electronic materials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials science, engineering, optics, physics, and chemistry into important applications of electronic materials. Sample research topics that span the journal's scope are inorganic, organic, ionic and polymeric materials with properties that include conducting, semiconducting, superconducting, insulating, dielectric, magnetic, optoelectronic, piezoelectric, ferroelectric and thermoelectric. Indexed/Abstracted： Web of Science SCIE Scopus CAS INSPEC Portico

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