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Preparation and properties of lauric acid/diatomite composites as novel form-stable phase change materials for thermal energy storage
Graphical abstract
Highlights Lauric acid/diatomite composite was prepared. The direct impregnation method without vacuum was used. Hybrid composite composed of organic PCM and inorganic supporting material.
Abstract 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°C and 38.7°C respectively. The latent heat of composite PCM is 57.2J/g. LA/diatomite composite does not decompose when the surrounding temperature is lower than 157°C, indicating that the composite PCM has a good thermal stability.
Preparation and properties of lauric acid/diatomite composites as novel form-stable phase change materials for thermal energy storage
Graphical abstract
Highlights Lauric acid/diatomite composite was prepared. The direct impregnation method without vacuum was used. Hybrid composite composed of organic PCM and inorganic supporting material.
Abstract 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°C and 38.7°C respectively. The latent heat of composite PCM is 57.2J/g. LA/diatomite composite does not decompose when the surrounding temperature is lower than 157°C, indicating that the composite PCM has a good thermal stability.
Preparation and properties of lauric acid/diatomite composites as novel form-stable phase change materials for thermal energy storage
Fu, Xiaowei (author) / Liu, Zhimeng (author) / Xiao, Yao (author) / Wang, Jiliang (author) / Lei, Jingxin (author)
Energy and Buildings ; 104 ; 244-249
2015-06-23
6 pages
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2012