Paraffin@Hectorite-SiO2/Fe3O4 microcapsule phase change fluid for efficient photothermal energy storage and heat dissipation

IF 5.3 2区地球科学 Q2 CHEMISTRY, PHYSICAL

Applied Clay Science Pub Date : 2025-03-23 DOI:10.1016/j.clay.2025.107797

Huanyu Zhu , Minghui Li , Hao Yi , Feifei Jia , Jinyue Xu , Shaoxian Song

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Abstract

Suspension stability and thermal conductivity are crucial for enhancing the heat dissipation efficiency of latent heat fluid. In this work, Paraffin@Hectorite-SiO₂/Fe₃O₄ phase change microcapsule based on paraffin core and hectorite/SiO₂/Fe₃O₄ composite shell was designed and fabricated using Pickering method, and it was dispersed into water to obtain latent heat fluid. DSC analysis indicated that the latent heat storage capacity of MPCM was 170.44 J/g with the 69.34 % encapsulation ratio. TGA analysis demonstrated that composite shell structure improved the thermal stability of paraffin. Heat dissipation tests indicated that the heat dissipation efficiency of Paraffin@Hectorite-SiO₂/Fe₃O₄-Water LHF were improved by 22.9 % compared with pure water, and the fluid could keep suspended at least 30 days. The introduction of Fe₃O₄ on shell structure enhanced the light absorption rate and the surface temperature could raise to 55.1 °C after exposure to sunlight for 15 min. The resultant LHF has a promising potential for applications in heat dissipation and solar energy storage.

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Paraffin@Hectorite-SiO2/Fe3O4微胶囊相变流体用于高效光热储能和散热

悬浮液的稳定性和导热性是提高潜热流体散热效率的关键。本文采用Pickering法设计制备了基于石蜡岩心和硅石/SiO2/Fe3O4复合壳的Paraffin@Hectorite-SiO2/Fe3O4相变微胶囊，并将其分散到水中获得潜热流体。DSC分析表明，MPCM的潜热储量为170.44 J/g，包封率为69.34%。TGA分析表明复合壳结构提高了石蜡的热稳定性。散热试验表明，Paraffin@Hectorite-SiO2/Fe3O4-Water LHF的散热效率比纯水提高了22.9%，且流体可悬浮至少30天。在壳结构上引入Fe3O4提高了光吸收率，光照15 min后表面温度可提高到55.1℃，在散热和太阳能储能方面具有广阔的应用前景。

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来源期刊

Applied Clay Science 地学-矿物学

CiteScore

10.30

自引率

10.70%

发文量

289

审稿时长

39 days

期刊介绍： Applied Clay Science aims to be an international journal attracting high quality scientific papers on clays and clay minerals, including research papers, reviews, and technical notes. The journal covers typical subjects of Fundamental and Applied Clay Science such as: • Synthesis and purification • Structural, crystallographic and mineralogical properties of clays and clay minerals • Thermal properties of clays and clay minerals • Physico-chemical properties including i) surface and interface properties; ii) thermodynamic properties; iii) mechanical properties • Interaction with water, with polar and apolar molecules • Colloidal properties and rheology • Adsorption, Intercalation, Ionic exchange • Genesis and deposits of clay minerals • Geology and geochemistry of clays • Modification of clays and clay minerals properties by thermal and physical treatments • Modification by chemical treatments with organic and inorganic molecules(organoclays, pillared clays) • Modification by biological microorganisms. etc...