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Shape‐Stabilized Phase Change Materials Based on Stearic Acid and Mesoporous Hollow SiO 2 Microspheres (SA/SiO 2 ) for Thermal Energy Storage
Author(s) -
Fan Shuang,
Gao Hongyi,
Dong Wenjun,
Tang Jia,
Wang Jingjing,
Yang Mu,
Wang Ge
Publication year - 2017
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201601380
Subject(s) - thermal energy storage , mesoporous material , stearic acid , phase change material , chemistry , chemical engineering , latent heat , thermal stability , thermal conductivity , melting point , microsphere , thermal , crystallization , energy storage , composite material , materials science , organic chemistry , catalysis , thermodynamics , power (physics) , physics , engineering
The development of solar energy conversion and storage technologies has been attracting considerable attention in recent years. In this paper, a novel shape‐stabilized phase change material (SSPCM) based on stearic acid (SA) and mesoporous hollow SiO 2 microspheres (SA/SiO 2 ) was synthesized by an impregnating method. The mesoporous silica microspheres with an additional hollow cavity not only provide high loading capacity but also favor the free crystallization of SA, which is confined in the hollow microspheres by interfacial interaction and capillary action. There is no leakage from the obtained SSPCMs even if the temperature exceeds the melting point of SA. The SA/SiO 2 PCM with 70 wt.‐% of SA exhibits high latent heat (reaching up to 135.3 J g –1 ), and its related thermal conductivity is 0.56 W mK –1 , which was enhanced by 56 % relative to that of pure SA. Moreover, the SA/SiO 2 composites show excellent thermal stability, which is beneficial for latent heat thermal energy storage (LHTES).