Rheological properties and tribological performance of tungsten disulfide nanosheet dispersed nanofluids

IF 5.45 Q1 Physics and Astronomy

Nano-Structures & Nano-Objects Pub Date : 2026-05-01 Epub Date: 2026-05-09 DOI:10.1016/j.nanoso.2026.101683

Anand Gaurav, Puja Jha, Aditya Roy, Gayatri Paul

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Abstract

The present study focuses on the assessment of rheological properties and tribological performance of tungsten disulphide (WS₂) nanosheet dispersed oil-based nanofluids. The prepared nanofluids are investigated to understand the prolonged dispersion stability. Results suggest that the nanofluids are stable for more than 15 days. The dispersion stability is further improved by adding suitable surface modifiers to the nanofluids. The rheological properties of the base fluid and the nanofluids are strongly governed by the concentration of nanosheets, shear rate, and type of surface modifier. The tribological performance of the nanofluids are studied under ball-plate sliding reciprocation simulated conditions. Parameters like applied load, type of surface modifier, concentration of nanosheets are observed to primarily affect the coefficient of friction and worn surface morphology of the mating tribo-pair. The addition of surfactant during the preparation of the nanofluids helps in stable dispersion of the nano-additives and reduces the coefficient of friction (COF). A maximum reduction of ∼30% in COF is observed for the nanofluids in comparison to the base oil. Nanofluids, in general, are observed to improve the tribological performance of the base oil by reduced wear and friction.

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二硫化钨纳米片分散纳米流体的流变性能和摩擦学性能

研究了二硫化钨（WS2）纳米片分散油基纳米流体的流变性能和摩擦学性能。研究了所制备的纳米流体的长期分散稳定性。结果表明，纳米流体在15天以上是稳定的。通过在纳米流体中加入合适的表面改性剂，进一步提高了纳米流体的分散稳定性。基液和纳米流体的流变性能在很大程度上受纳米片浓度、剪切速率和表面改性剂类型的影响。在球板滑动往复模拟条件下，研究了纳米流体的摩擦学性能。研究发现，载荷、表面改性剂类型、纳米片浓度等参数主要影响摩擦副的摩擦系数和磨损表面形貌。在纳米流体制备过程中加入表面活性剂有助于纳米添加剂的稳定分散，降低摩擦系数。与基础油相比，观察到纳米流体的COF最大减少约30%。一般来说，纳米流体通过减少磨损和摩擦来改善基础油的摩擦学性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nano-Structures & Nano-Objects Physics and Astronomy-Condensed Matter Physics

CiteScore

9.20

自引率

0.00%

发文量

审稿时长

22 days

期刊介绍： Nano-Structures & Nano-Objects is a new journal devoted to all aspects of the synthesis and the properties of this new flourishing domain. The journal is devoted to novel architectures at the nano-level with an emphasis on new synthesis and characterization methods. The journal is focused on the objects rather than on their applications. However, the research for new applications of original nano-structures & nano-objects in various fields such as nano-electronics, energy conversion, catalysis, drug delivery and nano-medicine is also welcome. The scope of Nano-Structures & Nano-Objects involves: -Metal and alloy nanoparticles with complex nanostructures such as shape control, core-shell and dumbells -Oxide nanoparticles and nanostructures, with complex oxide/metal, oxide/surface and oxide /organic interfaces -Inorganic semi-conducting nanoparticles (quantum dots) with an emphasis on new phases, structures, shapes and complexity -Nanostructures involving molecular inorganic species such as nanoparticles of coordination compounds, molecular magnets, spin transition nanoparticles etc. or organic nano-objects, in particular for molecular electronics -Nanostructured materials such as nano-MOFs and nano-zeolites -Hetero-junctions between molecules and nano-objects, between different nano-objects & nanostructures or between nano-objects & nanostructures and surfaces -Methods of characterization specific of the nano size or adapted for the nano size such as X-ray and neutron scattering, light scattering, NMR, Raman, Plasmonics, near field microscopies, various TEM and SEM techniques, magnetic studies, etc .