Preparation and thermal properties of stearic acid/diatomite composites as form-stable phase change materials for thermal energy storage via direct impregnation method

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• 作者：Xiaowei Fu ; Zhimeng Liu ; Bo Wu ; Jiliang Wang…
• 关键词：Composite phase change material ; Thermal energy storage ; Stearic acid ; Thermal properties
• 刊名：Journal of Thermal Analysis and Calorimetry
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：123
• 期：2
• 页码：1173-1181
• 全文大小：1,035 KB
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• 作者单位：Xiaowei Fu (1)
  Zhimeng Liu (1)
  Bo Wu (1)
  Jiliang Wang (2)
  Jingxin Lei (1)
  
  1. State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu, 610065, China
  2. School of Chemistry Science and Engineering, Yunnan University, Kunming, 650091, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Sciences
  Polymer Sciences
  Physical Chemistry
  Inorganic Chemistry
  Measurement Science and Instrumentation
  
• 出版者：Akad茅miai Kiad贸, co-published with Springer Science+Business Media B.V., Formerly Kluwer Academic
• ISSN：1572-8943

文摘

Stearic acid/diatomite composite form-stable phase change materials (PCMs) have been prepared by using a direct impregnation method without vacuum treatment. The surface morphology, chemical compatibility, thermal properties and thermal stability were characterized by scanning electron microscopy, Fourier transform infrared spectrometer and X-ray diffraction (XRD), differential scanning calorimeter and thermogravimetric analysis (TG), respectively. The results show that there are only physical interactions between stearic acid and diatomite in composite PCM. XRD analysis reveals that crystal type is not affected by composite technology of SA/diatomite composite form-stable PCM with decrease in crystal size due to the limited pores in diatomite. The melting and freezing temperatures of stearic acid/diatomite composite, respectively, are 52.3 and 48.4 °C. The latent heat of SA/diatomite composite reaches 57.1 J g−1, potential to be used in a practical application. TG result indicates that the decomposition of SA/diatomite composite starts at 192 °C, implying that the SA/diatomite has a good thermal stability. Keywords Composite phase change material Thermal energy storage Stearic acid Thermal properties