Environmentally friendly
microencapsulated phase change materials
(MEPCMs) with calcium carbonate (CaCO3) shells were modified
with graphene oxide (GO), and the effects of GO content and methodology
on MEPCMs were examined. The core–shell structure of MEPCMs
and crystal structure of CaCO3 shells were confirmed by
scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy
(FTIR), and X-ray diffractometer (XRD). The thermal properties and
stability of MEPCMs were investigated by differential scanning calorimetry
(DSC) and thermogravimetric analysis (TGA), suggesting that the addition
of GO contributed to improving the heat storage capacity and thermal
stability of MEPCMs. When the GO content was 1.0 wt %, the encapsulation
ratio of MEPCMs was as high as 73.19%, and the leakage rate was reduced
by 89.6% compared to the MEPCMs without GO. Furthermore, the thermal
conductivity and mechanical properties of GO modified MEPCMs were
improved significantly. The considerable latent heat storage, thermal
stability, thermal conductivity, leakageprevention,
and mechanical properties of GO modified paraffin@CaCO3 MEPCMs offer potential in green energy applications.
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