Preparation and characteristics of microencapsulated stearic acid as composite thermal energy storage material in buildings
作者： Zhi Chen , Lei Cao , Feng Shan , Guiyin Fang
DOI: 10.1016/J.ENBUILD.2013.03.025
关键词:
摘要: Abstract Microencapsulated stearic acid (SA) with silicon dioxide (SiO 2 ) shell as composite thermal energy storage material was prepared using sol–gel methods. In the material, used core that is latent heat phase change (PCM), and acted which prevented leakage of melted acid. Fourier transformation infrared spectroscope (FT-IR) scanning electronic microscope (SEM) were to determine chemical structure microstructure microencapsulated shell. The properties stability investigated by differential calorimeter (DSC) thermogravimetric analyzer (TGA). SEM results showed encapsulated in DSC indicated solidifies at 52.6 °C a 162.0 kJ/kg melts 53.5 °C 171.0 kJ/kg when encapsulation ratio SA 90.7%. TGA presented shells can improve material.
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