Abstract
A novel nanencapsulated phase change material (NEPCM) was fabricated via the self-assembly method with n-dodecanol as the core and SiO2 derived from sodium silicate as the shell. The as-prepared nanocapsules with different core/shell ratios were investigated systematically. Scanning electron microscopy and transmission electron microscopy photographs indicated that the products had a nearly spherical and compact surface with nanometer size. Fourier transform infrared spectroscopy and X-ray diffraction confirmed that SiO2 was successfully encapsulated upon n-dodecanol. Differential scanning calorimetry results showed that the NEPCMs exhibited similar phase change characteristics to pristine n-dodecanol, which melted at 21.03 °C with a latent heat of 116.7 J/g and solidified at 19.58 °C with a latent heat of 114.6 J/g. Thermogravimetric analysis and thermal cycle tests revealed that the nanocapsules had good thermal stability. In conclusion, the prepared nanocapsules have great potential for thermal energy ...
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