Abdolahi Fatemeh, Heydarinasab Amir, Rashidi Alimorad, Ardjmand Mehdi, Mohseni Mehdi Moayed
Department of Chemical Engineering, SR.C., Islamic Azad University, Tehran, Iran.
Nanotechnology Research Center, Research Institute of Petroleum Industry, Tehran, Iran.
Sci Rep. 2025 Aug 27;15(1):31662. doi: 10.1038/s41598-025-16956-9.
This study presents a systematic experimental evaluation of the thermal and rheological properties of Behran oil-based nanofluids formulated with three inexpensive and easily synthesized nitride nanoparticles: boron nitride (BN), carbon nitride (CN), and boron carbon nitride (BCN). Each nanoparticle was surface-functionalized to improve dispersion stability and dispersed at concentrations of 0.1-0.5 wt.%. Thermal conductivity, convective heat transfer coefficient, specific heat capacity, and viscosity were measured at 25 °C, 35 °C, and 50 °C. Structural and morphological characteristics of the nanostructures were confirmed through FTIR, XRD, SEM, TEM, and DLS analyses. The nanofluid containing BN showed the highest thermal conductivity enhancement (14.92% at 0.3 wt.% and 50 °C), while CN led to the greatest increase in specific heat capacity (414% at 25 °C). BCN exhibited moderate enhancements across both properties. All nanofluids exhibited minimal viscosity increases (< 1% at 50 °C), suggesting their potential suitability for high-performance thermal systems. These results highlight the potential of functionalized nitride nanostructures as effective additives for improving the heat transfer performance of industrial lubricants.
本研究对用三种廉价且易于合成的氮化物纳米颗粒（氮化硼（BN）、氮化碳（CN）和硼碳氮化物（BCN））配制的Behran油基纳米流体的热性能和流变性能进行了系统的实验评估。对每种纳米颗粒进行表面功能化处理以提高分散稳定性，并以0.1 - 0.5 wt.%的浓度进行分散。在25°C、35°C和50°C下测量了热导率、对流换热系数、比热容和粘度。通过傅里叶变换红外光谱（FTIR）、X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）和动态光散射（DLS）分析确定了纳米结构的结构和形态特征。含BN的纳米流体显示出最高的热导率增强（在0.3 wt.%和50°C时为14.92%），而CN导致比热容增加最大（在25°C时为414%）。BCN在这两种性能上均表现出适度的增强。所有纳米流体的粘度增加都很小（在50°C时<1%），表明它们可能适用于高性能热系统。这些结果突出了功能化氮化物纳米结构作为有效添加剂来改善工业润滑剂传热性能的潜力。
