Abstract
Adipic acid-amorphous silica composite phase change thermal energy materials are prepared by using a hydrothermal method. The composite materials are characterized by X-ray diffraction(XRD), Fourier transformation infrared spectroscopy(FT-IR), field emission scanning electron microscope(FE-SEM), and synchronous thermal gravimetric analyzer(TGA) and differential scanning calorimetry(DSC). The results show no sign of chemical reactions between adipic acid and silicon dioxide at pH of 5 and temperature of 150 ℃. The particle size of the composite phase change material is uniform with 1—2 μm diameter. The phase change temperatures and the latent heats of the composites are respectively 139.0 ℃ and 48.82 J/g for 30%(by mass) adipic acid loading and 140.5 ℃and 71.89 J/g for 50%(by mass) adipic acid loading.
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