Stable nano-enhanced phase change material emulsions of natural surfactant and silica nanoparticles for thermal energy storage applications

IF 6.1 2区 工程技术 Q2 ENERGY & FUELS Applied Thermal Engineering Pub Date : 2025-03-13 DOI:10.1016/j.applthermaleng.2025.126236
Alpana Singh , Tushar Sharma , Mahmood M.S. Abdullah , Vikram Vishal
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Abstract

The study investigates the stabilization of n-PCM (nano phase change material) emulsions using natural surfactants combined with silica nanofluid of single step origin at concentrations of 0.5 and 1 wt%. The novelty of study lies in application of natural surfactant used to enhance the emulsification process, ensures a sustainable and non-toxic stabilization method. Silica nanofluid of single step origin was incorporated to improve stability and performance, making these advanced emulsions a practical choice for various industrial applications. The emulsions were characterized through various techniques, including differential scanning calorimetry to assess thermal properties, interfacial tension measurements to evaluate emulsification efficiency, microscopic analysis for droplet distribution, and rheological testing to determine viscosity changes. Corrosion tests were conducted to investigate the protective effects of the stabilizers, while scanning electron microscopy and energy dispersive x-ray spectroscopy provided insight into the structural characteristics and distribution of nanoparticles within the emulsion. The results demonstrated that the addition of 0.5 wt% silica nanofluid significantly improved the stability and thermal characteristics of the n-PCM emulsion without adversely affecting its phase change behavior, with melting point of 21.08 °C, enthalpy of melting 1205.171 J/g, freezing point of 15.46 °C and enthalpy of crystallization 1284.825 J/g. In contrast, the emulsion with 1 wt% silica nanofluid led to alterations in thermal properties and viscosity, suggesting a more complex interaction with the n-PCM matrix. Overall, the study highlights that a lower concentration of silica nanoparticles (0.5 wt%) is preferable for optimizing the stability and thermal performance of n-PCM emulsions, making it a viable approach for applications requiring efficient thermal energy management.

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本研究调查了天然表面活性剂与单步来源的纳米二氧化硅流体在 0.5 和 1 wt% 浓度下对 n-PCM(纳米相变材料)乳液的稳定作用。这项研究的新颖之处在于利用天然表面活性剂来增强乳化过程,从而确保采用一种可持续且无毒的稳定方法。研究还加入了单步来源的纳米二氧化硅流体,以提高稳定性和性能,使这些先进的乳液成为各种工业应用的实用选择。通过各种技术对乳液进行了表征,包括评估热性能的差示扫描量热法、评估乳化效率的界面张力测量法、液滴分布的显微分析法以及确定粘度变化的流变测试法。此外,还进行了腐蚀测试以研究稳定剂的保护作用,而扫描电子显微镜和能量色散 X 射线光谱分析则有助于深入了解纳米粒子在乳液中的结构特征和分布情况。结果表明,添加 0.5 wt% 的二氧化硅纳米流体可显著提高 n-PCM 乳液的稳定性和热特性,而不会对其相变行为产生不利影响,其熔点为 21.08 ℃,熔化焓为 1205.171 J/g,凝固点为 15.46 ℃,结晶焓为 1284.825 J/g。相比之下,含有 1 wt% 二氧化硅纳米流体的乳液会导致热特性和粘度发生变化,这表明与正 PCM 基质之间的相互作用更为复杂。总之,该研究强调,较低浓度的二氧化硅纳米粒子(0.5 wt%)更适合优化 n-PCM 乳液的稳定性和热性能,使其成为需要高效热能管理的应用中的一种可行方法。
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来源期刊
Applied Thermal Engineering
Applied Thermal Engineering 工程技术-工程:机械
CiteScore
11.30
自引率
15.60%
发文量
1474
审稿时长
57 days
期刊介绍: Applied Thermal Engineering disseminates novel research related to the design, development and demonstration of components, devices, equipment, technologies and systems involving thermal processes for the production, storage, utilization and conservation of energy, with a focus on engineering application. The journal publishes high-quality and high-impact Original Research Articles, Review Articles, Short Communications and Letters to the Editor on cutting-edge innovations in research, and recent advances or issues of interest to the thermal engineering community.
期刊最新文献
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