Stability is the key for nanofluids to enter applications: Reflections from a case study on PDMS/TiO2 nanofluids

IF 5.4 3区工程技术 Q2 ENERGY & FUELS Thermal Science and Engineering Progress Pub Date : 2025-03-01 Epub Date: 2025-01-22 DOI:10.1016/j.tsep.2025.103288

Iván Carrillo-Berdugo, María Gragera-García, Saray Gragera-García, Juan Jesús Gallardo, Desirée de los Santos, Rodrigo Alcántara, Javier Navas

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Abstract

This work examines the stability and the density, dynamic viscosity, specific heat capacity and thermal conductivity of a series of polydimethylsiloxane-based nanofluids with TiO₂ nanoparticles. Even though polydimethylsiloxane (silicone) is a promising heat transfer fluid for concentrating solar power, its non-polar, aprotic nature complicates the production of stable nanofluids without surfactants or pH control. This, in turn, limits the efficiency and lifespan of these nanofluids. The case study dedicates some space for reflection about the stability challenge for the research community working on nanofluids at fundamental and applied levels. A robust experimental protocol is sketched for quality control in the design of nanofluids, stressing the need for a quantitative assessment of stability before thermal performance is appraised.

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稳定性是纳米流体进入应用的关键：来自PDMS/TiO2纳米流体案例研究的思考

本研究考察了一系列含有TiO2纳米粒子的聚二甲基硅氧烷基纳米流体的稳定性、密度、动态粘度、比热容和导热系数。尽管聚二甲基硅氧烷（有机硅）是一种很有前途的用于聚光太阳能的传热流体，但它的非极性、非质子性质使得在没有表面活性剂或pH控制的情况下生产稳定的纳米流体变得复杂。这反过来又限制了这些纳米流体的效率和使用寿命。该案例研究为研究纳米流体在基础和应用层面的稳定性挑战提供了一些思考空间。本文为纳米流体设计中的质量控制制定了一个可靠的实验方案，强调在评价热性能之前需要对稳定性进行定量评估。

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来源期刊

Thermal Science and Engineering Progress Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

7.20

自引率

10.40%

发文量

327

审稿时长

41 days

期刊介绍： Thermal Science and Engineering Progress (TSEP) publishes original, high-quality research articles that span activities ranging from fundamental scientific research and discussion of the more controversial thermodynamic theories, to developments in thermal engineering that are in many instances examples of the way scientists and engineers are addressing the challenges facing a growing population – smart cities and global warming – maximising thermodynamic efficiencies and minimising all heat losses. It is intended that these will be of current relevance and interest to industry, academia and other practitioners. It is evident that many specialised journals in thermal and, to some extent, in fluid disciplines tend to focus on topics that can be classified as fundamental in nature, or are ‘applied’ and near-market. Thermal Science and Engineering Progress will bridge the gap between these two areas, allowing authors to make an easy choice, should they or a journal editor feel that their papers are ‘out of scope’ when considering other journals. The range of topics covered by Thermal Science and Engineering Progress addresses the rapid rate of development being made in thermal transfer processes as they affect traditional fields, and important growth in the topical research areas of aerospace, thermal biological and medical systems, electronics and nano-technologies, renewable energy systems, food production (including agriculture), and the need to minimise man-made thermal impacts on climate change. Review articles on appropriate topics for TSEP are encouraged, although until TSEP is fully established, these will be limited in number. Before submitting such articles, please contact one of the Editors, or a member of the Editorial Advisory Board with an outline of your proposal and your expertise in the area of your review.