Synergistic thermal and surface area properties of Al₂O₃–TiO₂/water hybrid nanofluids

作     者：Djentoe, Yokanan Gustino Widiasto, Farrel Yoga Effendi, Hilbran Tama Dida Musabbikhah Hartati, Sri Santoso, Budi Kristiawan, Budi Wijayanta, Agung Tri 

作者机构：Department of Mechanical Engineering Faculty of Engineering Universitas Sebelas Maret Jl. Ir. Sutami 36A Kentingan Surakarta 57126 Indonesia Master Program of Mechanical Engineering of Engineering Universitas Sebelas Maret Jl. Ir. Sutami 36A Kentingan Surakarta 57126 Indonesia Department of Mechanical Engineering Sekolah Tinggi Teknologi “Warga” Surakarta Jl. Raya Solo – Baki KM 2 Grogol Sukoharjo 57552 Indonesia Department of Agricultural Technology Universitas Veteran Bangun Nusantara Jl. Letnan Jenderal Sujono Humardani 1 Gadingan Jombor Bendosari Sukoharjo 57521 Indonesia Research Group of Sustainable Thermofluids Universitas Sebelas Maret Jl. Ir. Sutami 36A Kentingan Surakarta 57126 Indonesia 

出 版 物：《Case Studies in Chemical and Environmental Engineering》 (Case. Stud. Chem. Environ. Eng.)

年 卷 期：2025年第11卷

基　　金：Institute for Research and Community Service of Universitas Sebelas Maret  (194.2/UN27.22/PT.01.03/2024) 

主　　题：Hybrid nanofluid Specific heat Thermal conductivity Thermal property 

摘      要：This work investigated experimentally on synergistic thermal and surface area properties of water-based Al2O3–TiO2 hybrid nanoparticles at a given volume ratio (50:50). Morphology and structure characterization were performed using Transmission Electron Microscope (TEM) and Surface Area Analysis (SAA), while thermal properties were analyzed using a thermal properties analyzer. The aims of this study were to investigate morphology and structure characterization and to evaluate thermal behavior using Transient Line Heat Source (TLHS), including thermal conductivity, heat capacity, and diffusivity. TEM micrographs revealed that TiO2 and Al2O3 nanoparticles were characterized by fractal-like arrangements and quasi-spherical morphology, respectively. The structural analysis of TiO2 and Al2O3 nanoparticles reveals a mesoporous structure with curve isotherm type IV that has loop hysteresis characteristics. The thermal durability of the water-based Al2O3–TiO2 hybrid nanoparticles is shown to have a strong relationship with the Moldoveanu model, confirming the trend of increasing thermal durability with a decrease in temperature as a result of increased nanoparticle mobility. According to this study, thermal behavior indicates that there are differences in temperature between 20 and 65 °C. Heat capacity increases significantly from 4 to 8 MJ/m2·K, with the fastest change occurring between 20 and 30 °C, whereas thermal diffusivity is bounded between 0 and 0.2 mm2/s. All of this highlights the potential applications in analysis and energy storage, highlighting the transfer characteristics of nanomaterials that are useful. The potential of hybrid nanofluids in long-term thermal management systems is demonstrated in this case study. © 2025 The Authors