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Preparation and properties of lauric acid/diatomite composites as novel form-stable phase change materials for thermal energy storage

机译：月桂酸/硅藻土复合材料的制备及其形稳储热新相变材料的性能

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摘要

The lauric acid (LA)/diatomite composite phase change materials (PCMs) were prepared using a direct impregnation method, in which LA was chosen as PCM. The chemical structure, chemical compatibility, element composition, crystalline structure, thermal properties and thermal stability of LA/diatomite composite were extensively investigated by Fourier transform infrared (FTIR) spectroscopy, energy dispersive spectroscopy, X-ray diffraction (XRD), differential scanning calorimetry and thermal gravimetric analysis. FTIR and XRD results indicate that there are only physical interactions between LA and diatomite in LA/diatomite composite. The decrease of XRD intensity of composite PCM confirms the reduction of the crystalline size of LA in LA/diatomite composite. The melting and freezing temperatures of composite PCM are 40.9 degrees C and 38.7 degrees C respectively. The latent heat of composite PCM is 57.2 J/g. LA/diatomite composite does not decompose when the surrounding temperature is lower than 157 degrees C, indicating that the composite PCM has a good thermal stability. (C) 2015 Published by Elsevier B.V.
机译：采用直接浸渍法制备了月桂酸（LA）/硅藻土复合相变材料（PCM），其中选择LA作为PCM。用傅立叶变换红外光谱，能量色散，X射线衍射，差示扫描量热法对LA /硅藻土复合材料的化学结构，化学相容性，元素组成，晶体结构，热性能和热稳定性进行了广泛的研究。和热重量分析。 FTIR和XRD结果表明LA /硅藻土复合物中LA与硅藻土之间仅存在物理相互作用。复合材料PCM的XRD强度降低证实了LA /硅藻土复合材料中LA晶体尺寸的减小。复合材料PCM的熔化和凝固温度分别为40.9摄氏度和38.7摄氏度。复合PCM的潜热为57.2 J / g。当周围温度低于157摄氏度时，LA /硅藻土复合材料不会分解，表明复合材料PCM具有良好的热稳定性。 （C）2015由Elsevier B.V.发布

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  • 来源
    《Energy and Buildings》 |2015年第10期|244-249|共6页
  • 作者

    Fu Xiaowei; Liu Zhimeng; Xiao Yao; Wang Jiliang; Lei Jingxin;

  • 作者单位

    Sichuan Univ, Polymer Res Inst, State Key Lab Polymer Mat Engn, Chengdu 610065, Peoples R China;

    Sichuan Univ, Polymer Res Inst, State Key Lab Polymer Mat Engn, Chengdu 610065, Peoples R China;

    Sichuan Univ, Polymer Res Inst, State Key Lab Polymer Mat Engn, Chengdu 610065, Peoples R China;

    Yunnan Univ, Sch Chem Sci & Engn, Kunming 650091, Peoples R China;

    Sichuan Univ, Polymer Res Inst, State Key Lab Polymer Mat Engn, Chengdu 610065, Peoples R China;

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

    Phase change material; Composite; Lauric acid; Thermal energy storage; Diatomite;

    机译：相变材料;复合材料;月桂酸;热能存储;硅藻土;

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