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Microencapsulated n-alkane eutectics in polystyrene for solar thermal applications

机译:聚苯乙烯中用于太阳能热应用的微囊化正烷共晶

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摘要

Some n-alkanes (n-tetracosane: C24, n-eicosane: C20, n-nonadecane: C19, n-octadecane: C18, and n-heptadecane: C17) and their eutectic mixture have been encapsulated in polystyrene (PS) as phase change materials (PCMs) in order to benefit from solar energy. The eutectic melting points and combination ratios of C17-C18, C20-C17, C20-C19, and C20-C24 eutectic mixtures (EMs) were found out theoretically and proven experimentally before the encapsulation processes. Microencapsulated eutectic mixtures (MEEMs) were structurally proven using a Fourier Transform Infrared (FTIR) Spectroscopy Analysis and morphologically investigated using a Scanning Electron Microscopy (SEM), a Polarized Optical Microscopy (POM), and a Particle Size Distribution (PSD) analyzer. Differential Scanning Calorimetry (DSC) analysis was primarily considered for characterization. MEEMs had reversible and mostly isothermal phase change temperatures between 21.0 and 35.9 degrees C and enthalpy between 61.2 and 146.1 J/g. These values were intentially suitable for solar thermal applications. Thermogravimetry Analysis (TGA) was performed to reveal thermal stability limits of the MEEMs. Accelarated thermal cycling experiments were performed to investigate stability of MEEMs.
机译:一些正构烷烃(正十四烷:C24,正二十烷:C20,正十八烷:C19,正十八烷:C18和正十七烷:C17)及其共晶混合物已被包裹在聚苯乙烯(PS)中作为相更换材料(PCM)以从太阳能中受益。在封装过程之前,从理论上找到了C17-C18,C20-C17,C20-C19和C20-C24共晶混合物(EMs)的共熔点和混合比。微胶囊化的共晶混合物(MEEM)已通过傅立叶变换红外(FTIR)光谱分析进行了结构验证,并使用扫描电子显微镜(SEM),偏振光学显微镜(POM)和粒度分布(PSD)分析仪进行了形态学研究。差示扫描量热法(DSC)分析主要用于表征。 MEEMs的可逆相变温度大多在21.0至35.9摄氏度之间,而等焓则在61.2至146.1 J / g之间。这些值本质上适合于太阳能应用。进行热重分析(TGA)以揭示MEEM的热稳定性极限。进行加速的热循环实验以研究MEEM的稳定性。

著录项

  • 来源
    《Solar Energy》 |2018年第1期|32-42|共11页
  • 作者单位

    Gaziosmanpasa Univ, Dept Chem, TR-60240 Tokat, Turkey;

    Gaziosmanpasa Univ, Dept Chem, TR-60240 Tokat, Turkey;

    Gaziosmanpasa Univ, Dept Chem, TR-60240 Tokat, Turkey;

    Karadeniz Tech Univ, Dept Met & Mat Engn, Trabzon, Turkey;

    Gaziosmanpasa Univ, Dept Chem, TR-60240 Tokat, Turkey;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Microencapsulation; Eutectic paraffins mixture; Energy storage;

    机译:微囊化;共晶石蜡混合物;储能;
  • 入库时间 2022-08-18 00:22:51

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